RESUMEN

A 72-year-old male with dementia and Parkinson's disease presented at the otorhinolaryngology outpatient clinic with acute dysphagia. A chest x­ray showed a dental prosthesis in the upper esophagus, which was subsequently extracted via rigid esophagoscopy. Due to suspected esophageal perforation on postoperative CT, a cervical approach to the esophagus and flexible esophagoscopy were used, but no evidence of perforation could be identified. This case highlights challenges in managing high-risk esophageal foreign bodies in the upper esophagus, emphasizing the need for careful assessment and a multidisciplinary approach.

Asunto(s)

RESUMEN

Aim: The rising average age increases edentulous cases, demanding more implant-prosthetic rehabilitation, with cardiovascular diseases being significant factors. This study compared healthy patients (CG = Control Group) and those with cardiovascular disease (TG = Test Group) for implant survival, Marginal Bone Loss (MBL), peri-implant tissue level parameters as Periodontal Screening and Recording (PSR), Plaque Index (PI), Bleeding on Probing (BoP) Peri-implant Probing Depth (PPD), and surgical complications. Smoking impact on both groups and medication influence in the TG were secondary outcomes. Patients underwent full-arch implant prosthetic rehabilitation. Methods: Implant survival rate, MBL, and surgical complications were recorded during the monitoring period (7 years), while peri-implant parameters were assessed at the end of the observational time. A total of 26 and 28 CG and TG patients were recruited, respectively. Results: A total of 128 implants were placed in CG, while 142 in the TG. Implant survival and MBL showed no significant differences (p > 0.05). Nevertheless, peri-implant parameters were more unfavorable in TG. The only significant surgical complication was higher bleeding rates in the TG (p < 0.05). Conclusions: Cardiovascular patients showed similar implant survival and MBL but had adverse peri-implant parameters and increased bleeding rates. Higher smoking levels may relate to unfavorable implant outcomes. Further investigation is needed on drug impact with larger samples.

RESUMEN

OBJECTIVES: The aim of the present study was to evaluate clinical and radiographic outcomes of implants placed in alveolar sockets treated by means of alveolar ridge preservation after 10 years of follow-up. METHOD AND MATERIALS: Eleven patients treated with 11 implants placed after alveolar ridge preservation using bovine-derived xenograft particles and collagen membrane were selected. Full-mouth plaque score, full-mouth bleeding score, probing depth at four sites per implant, and radiographic marginal bone level at mesial and distal aspects for each implant were recorded at baseline and after 10 years of follow-up. The primary outcome was the radiographic marginal bone loss. The marginal bone loss was considered as the difference between marginal bone level at baseline and after 10 years of observation time. RESULTS: After 10 years of follow-up, full-mouth plaque score increased significantly (P < .05), while no statistically significant differences were found in the change in full-mouth bleeding score (P ≥ .05). At the 10-year observation period, a significant increase in probing depth was observed at all sites (P < .05), except at the mesial aspects (P ≥ .05). Radiographic marginal bone loss was 1.1 ± 0.1 mm and 1.0 ± 0.1 mm at mesial and distal sites, respectively. CONCLUSION: Whitin the limitations of the present study, implants placed in post-extraction sockets treated with alveolar ridge preservation yielded stable clinical and radiographic results after 10 years of follow-up.

Asunto(s)

RESUMEN

Introducción: evaluar la satisfacción con los tratamientos requiere cuestionarios específicos y validados que garanticen una prestación del servicio adecuada y que contribuya al bienestar de las personas. El objetivo fue evaluar la validez y la confiabilidad de la versión colombiana de un cuestionario sobre satis-facción en una población de usuarios de prótesis total. Materiales y métodos: se realizó un estudio de evaluación de tecnología diagnóstica con una población de 226 pacientes, a partir de las características sociodemográficas y los diez ítems del instrumento. Se analizó la consistencia interna, la reproducibilidad prueba-reprueba y los límites de acuerdo de Bland y Altman. Así mismo, se analizaron los componentes y se aplicó el modelo de Rasch. Resultados: participaron 158 (69.91 %) mujeres y la mediana de edad fue de 69 años. Se obtuvieron un alfa de Cronbach de 0.90 y un coeficiente de correlación intraclase de 0.91. Se identificaron dos factores, los diez ítems se ajustaron al modelo de Rasch y no se observó un funcionamiento diferencial del ítem. Conclusiones: la versión colombiana del cuestionario presentó excelente confiabilidad y las medidas obtenidas explicaron el 58.60 % de la varianza.

Introduction: Evaluating treatment satisfaction requires a specific and validated questionnaire that can obtain information about adequate service provision and contribute to people's well-being. The objective of this study was to evaluate the validity and reliability of the Colombian version of a questionnaire on satisfaction among complete denture wearers. Materials and methods: This survey evaluated diagnostic technology used among 226 patients. Information on sociodemographic characteristics was obtained and ten items of the instrument were evaluated. Internal consistency, test-retest reproducibility, and Bland-Altman limits of agreement were analyzed. Component analysis was performed and the Rasch model was used. Results: Median age of the participants was 69 (ric: 63-76) years, and 158 (69.91%) were women. Cronbach's alpha and intraclass correlation coefficients were 0.91 and 0.80, respectively. Two factors were identified, all ten items conformed to the Rasch model and no differential item functioning was observed. Conclusions: The Colombian version of the questionnaire showed excellent reliability, and the proportion of variance explained by the measures was deemed satisfactory (58.60%).

Introdução: a avaliação da satisfação com os tratamentos requer questionários específicos e validados, que garantam uma prestação de serviço adequada e contribuam para o bem-estar das pessoas. O obje-tivo é avaliar a validade e confiabilidade da versão colombiana de um questionário de satisfação em uma população de usuários de próteses dentárias totais. Materiais e métodos: foi realizado um estudo de avaliação de tecnologia diagnóstica com uma população de 226 pacientes. Foram avaliadas as carac-terísticas sociodemográficas e os dez itens do instrumento. A consistência interna, a reprodutibilidade teste-reteste e os limites de concordância foram analisados de acordo com Bland e Altman. Foi reali-zada uma análise de componentes e aplicado o modelo Rasch. Resultados: participaram 158 (69,91%) mulheres, a mediana de idade foi de 69 anos. Obteve-se um alfa de Cronbach de 0,90 e um coeficiente de correlação intraclasse de 0,91. Dois fatores foram identificados, os dez itens se ajustaram ao modelo Rasch e nenhum funcionamento diferencial dos itens foi observado. Conclusões: A versão colombiana do questionário apresentou excelente confiabilidade e as medidas obtidas explicaram 58,60% da variância.

Asunto(s)

RESUMEN

This study aimed to investigate the effect of two ceramic primers on the microshear bond strength (µSBS) of yttria-stabilized zirconia (Y-TZP) to two types of self-adhesive resin cement and one BisGMA-based resin cement. Zirconia specimens were sandblasted with 27-µm aluminum oxide and composite cylinders were cemented with resin cement with or without the prior use of ceramic primers. Nine groups (n=12) were randomly distributed according to the cement (self-adhesive RelyX U200/3M ESPE, self-adhesive Maxcem Elite/Kerr, and BisGMA-based dual-cure RelyX ARC/3M ESPE) and ceramic primer (Z-Primer Plus/Bisco and Porcelain Liner M/Sun Medical Co.). After luting, the specimens were stored in distilled water at 37°C for 24 hours and then submitted to the µSBS test. The data were analyzed with two-way ANOVA followed by the Scheffe post hoc test (p<0.05). There were significant differences between RelyX U200 and other groups. There were also significant differences between the RelyX U200 group without ceramic primer and other groups without ceramic primers (p<0.05). Self-adhesive resin cement (RelyX U200 and MaxCem) presented higher microshear bond strength (6.17 and 2.32 MPa) than the conventional resin cement (RelyX ARC) when a porcelain primer was not used (0.43 MPa). When using Porcelain Liner M, the results of RelyX ARC (2.94 MPa) were equivalent to the results of self-adhesive cement (3.93 and 2.11 MPa). When using Z-Prime Plus, the results of MaxCem (5.36 MPa) were lower than those of RelyX U200 (9.59 MPa) but equivalent to those of RelyX ARC (6.07 MPa). When using the RelyX ARC, the use of both ceramic primers improved bond strength to zirconia. When using self-adhesive resin cement, Z-Prime Plus improved microshear bond strength values. It can be concluded that, after 24 hours, the highest µSBS results were obtained when using Z-Prime Plus and RelyX U200 self-adhesive cement.

Asunto(s)

RESUMEN

The goal of this pilot study was to develop an age-estimation formula and assess its effectiveness after evaluating individual intraoral findings. A total of 198 Japanese adults were included, and intraoral findings were collected from the corpses. To analyze the condition of each tooth, 20 items were established for intraoral findings, and seven tooth states were established. Logistic regression analysis was used to estimate the impact of age on each intraoral finding. Sequentially, linear regression was applied to verify the correlation between age and type of tooth, and multiple regression was used to correlate age-dependent factors. The intraoral findings with age dependency were tooth stump, edentulous jaw, attrition, no caries, dental prostheses, partial dentures, and complete dentures. Tooth stump, attrition, and dental prostheses showed positive multicollinearity. Missing tooth, extant tooth, normal teeth, and untreated lost teeth were age-correlated. Multiple regression analysis included age as the response variable and five factors as the explanatory variables in a new age-estimation formula, resulting in ± 10 years for 86.96% of cases (60-69 years old), 76.47% (70-79 years old), and 61.05% of all cases. The multiple correlation was 0.551, and the contribution rate of the multiple regression formula was 0.304. The accuracy of the proposed age-estimation formula was within ± 10 years for 61.05% of all subjects. However, the accuracy of age estimation in subjects aged 60-79 years was excellent (76.47-86.96%), which showed that this age-estimation formula would be effective for estimating the age of middle-aged to older subjects.

Asunto(s)

RESUMEN

OBJECTIVES: This study aimed to evaluate the immediate accuracy of the digital osteotomy template in the digital stackable template. METHODS: From November 2018 to January 2020, 4 patients with dentition loss were selected from the Prosthodontics Department, West China Stomatological Hospital. All patients met the conditions for immediate planting and immediate restoration. Owing to the lack of vertical target-restoration space, the implantation plan included intraoperative osteotomy. According to the preoperative cone beam CT (CBCT) data, combined with aesthetic digital smile design (DSD) analysis, virtual wax design, and so on, the ideal bone plane design was performed. According to the virtual osteotomy plane, the virtual implantation plan was designed, and then the digital stackable template assuming osteotomy template, implantation guide, and temporary restoration were made and 3D printed. Osteotomy was performed under the guidance of digital osteotomy template during the operation. The preoperative CBCT and postoperative CBCT of all patients overlapped, the deviation between the actual osteotomy and the ideal osteotomy was calculated, and the angle deviation between the postoperative bone plane and the ideal bone plane was measured. RESULTS: The ave-rage volume deviation between the postoperative design and the ideal one was 492.94 mm³, accounting for 21.21% of the preset osteotomy volume. The average deviation between the postoperative osteotomy and the ideal osteotomy in four patients was 0.024 8 mm. The average angle between the postoperative bone plane and the ideal bone plane was 6.03°. CONCLUSIONS: The displacement deviation of virtual osteotomy design and the actual osteotomy one under the guidance of digital osteotomy template in the digital stackable template are highly consistent with the original design. Thus, this clinical technique is worth popularizing, accurate, and quantifiable.

Asunto(s)

RESUMEN

OBJECTIVES@#This study aimed to evaluate the immediate accuracy of the digital osteotomy template in the digital stackable template.@*METHODS@#From November 2018 to January 2020, 4 patients with dentition loss were selected from the Prosthodontics Department, West China Stomatological Hospital. All patients met the conditions for immediate planting and immediate restoration. Owing to the lack of vertical target-restoration space, the implantation plan included intraoperative osteotomy. According to the preoperative cone beam CT (CBCT) data, combined with aesthetic digital smile design (DSD) analysis, virtual wax design, and so on, the ideal bone plane design was performed. According to the virtual osteotomy plane, the virtual implantation plan was designed, and then the digital stackable template assuming osteotomy template, implantation guide, and temporary restoration were made and 3D printed. Osteotomy was performed under the guidance of digital osteotomy template during the operation. The preoperative CBCT and postoperative CBCT of all patients overlapped, the deviation between the actual osteotomy and the ideal osteotomy was calculated, and the angle deviation between the postoperative bone plane and the ideal bone plane was measured.@*RESULTS@#The ave-rage volume deviation between the postoperative design and the ideal one was 492.94 mm³, accounting for 21.21% of the preset osteotomy volume. The average deviation between the postoperative osteotomy and the ideal osteotomy in four patients was 0.024 8 mm. The average angle between the postoperative bone plane and the ideal bone plane was 6.03°.@*CONCLUSIONS@#The displacement deviation of virtual osteotomy design and the actual osteotomy one under the guidance of digital osteotomy template in the digital stackable template are highly consistent with the original design. Thus, this clinical technique is worth popularizing, accurate, and quantifiable.

Asunto(s)

RESUMEN

RESUMEN Objetivo: El propósito de la investigación fue evaluar la resistencia a la tracción diametral in vitro de cinco cementos dentales: BisCem, Duolink, Ketac Cem, Meron, Allcem, cuatro adhesivos convencionales y un autoadhesivo polimerizado químicamente utilizados como cementantes de puentes y coronas en prótesis fijas. Materiales y métodos: Se prepararon 100 especímenes conformados por cementos: BisCem, Duolink, Ketac Cem, Meron, Allcem, los cuales se dividieron aleatoriamente en 5 grupos de 20 especímenes cada grupo sujetas a fotopolimerización y auto polimerización de 8mm de diámetro y 5mm de alto, con 2mm de distancia aproximadamente de la lámpara para la polimerización, se utilizó un formador de probetas de polietileno de alta densidad estandarizado, el tipo de muestreo es no probabilístico. Se sometieron a los especímenes de cada grupo a la prueba de tracción utilizando una máquina de ensayo universal (zwickiLine by Zwick/Roell), hasta lograr el fracaso del cemento, sometidas a una fuerza continua de 500 kg, con una velocidad de desplazamiento fija de 1 cm/min. Resultados: La resistencia promedio a la tracción diametral de probetas del cemento BisCem fue de 38,75 ± 11,56 MPa, del cemento Duolink fue 64,30 MPa, del cemento Meron 57,14 MPa, del cemento Ketac Cem es de 32,23 MPa, del cemento BisCem (38,753 MPa) y el cemento Ketac Cem (39,233 MPa). El cemento dental Duolink es aquel que presenta mayor resistencia a la tracción diametral de probetas en comparación a Meron (57,137 MPa) que es su similar. La tabulación y el análisis han sido sometidos a los test de Shapiro Wilk, análisis de varianza ANOVA y la prueba de Tuckey los valores de cada muestra se distribuyen normalmente existiendo diferencias significativas entre los grupos estudiados. Conclusiones: Las probetas del cemento de resina adhesiva Duolink evidenció una mayor resistencia a la tracción diametral con mejores valores significativos de resistencia a diferencia de los cementos Ketac Cem, Allcem, Meron y BisCem.

SUMMARY Objetive: The purpose of the research was to evaluate the in vitro diametral tensile strength of five dental cements: BisCem, Duolink, Ketac Cem, Meron, Allcem, four conventional adhesives and a chemically polymerized self-adhesive used as bridge cements and crowns in fixed dentures . Materials and methods : 100 specimens consisting of cements were prepared: BisCem, Duolink, Ketac Cem, Meron, Allcem, which were randomly divided into 5 groups of 20 specimens each group subject to photopolymerization and self-polymerization of 8mm in diameter and 5mm high, with an approximate distance of 2mm from the lamp for polymerization, a standardized high density polyethylene specimen was used, the type of sampling is not probabilistic. The specimens of each group were subjected to tensile testing using a universal testing machine (zwickiLine by Zwick / Roell), until the failure of the cement was achieved, subjected to a continuous force of 500 kg, with a fixed displacement speed of 1 cm / min Results: The average tensile strength of diametral tensile specimens of BisCem cement was 38.75 ± 11.56 MPa, Duolink cement was 64.30 MPa, Meron cement 57.14 MPa, Ketac Cem cement was 32.23 MPa, BisCem cement (38.753 MPa ) and Ketac Cem cement (39,233 MPa). Duolink dental cement is the one with the highest tensile strength of diametral specimens compared to Meron (57,137 MPa), which is similar. The tabulation and the analysis have been submitted to the Shapiro Wilk test, ANOVA analysis of variance and the Tuckey test. The values of each sample are normally distributed with significant differences between the studied groups. Conclusions : Duolink adhesive resin cement specimens showed a higher diametral tensile strength with better significant strength values unlike Ketac Cem, Allcem, Meron and BisCem cements.

RESUMEN

Objetivos ­ À vista disso, conhecendo como a principal condição exógena para que ocorra a proliferação de Candida e introdução de Candidose em cavidade oral é a prótese dentária com tempo de uso de mais de 5 anos, propomos nesse estudo avaliar a quantificação de Candida na saliva pacientes usuários de prótese parcial e total removíveis, correlacionando com idade avançada e o fluxo salivar e fatores que possam agir influenciando sua quantificação. As espécies do gênero Candida são normalmente encontradas na microbiota de pacientes saudáveis, sendo a C. Albicans a mais comum. Já a patogenicidade da espécie só ocorre caso haja condições propicias para o seu desenvolvimento, como comprometimento do sistema imune, hiposalivação e uso incorreto de próteses. As próteses totais, em especial, estão associadas ao aumento de UFC e presença de candidose na cavidade oral. Métodos ­ Foram avaliados 121 indivíduos sendo 31 do grupo controle e 90 usuários de próteses dentárias. Foram realizada uma coleta de saliva de cada paciente no momento da primeira consulta odontológica e os pacientes foram classificados quanto ao fluxo salivar em reduzido, normal e aumentados. A análise microbiológica foi realizada com a mesma saliva utilizada na avaliação do fluxo salivar, sendo estas semeadas e a as colônias de Candida foram quantificadas e os pacientes serão categorizados em negativos, portadores e positivos. Resultados ­ Foi possível uma relação forte no que se refere a diminuição do fluxo salivar associado a idade avançada e em decorrência disto, com a quantidade de UFC de Candida na saliva dos pacientes estudados. Conclusão ­ Posto isso, fica comprovado que os pacientes que utilizam próteses removíveis são os com maior quantidade de UFC, seguidos pelos pacientes que utilizam próteses totais

Objectives ­ In view of this, knowing as the main exogenous condition for the occurrence of Candida proliferation and introduction of Candidosis in oral cavity is the dental prosthesis with time of use of more than 5 years, we propose in this study to carry out a evaluation the quantification of the presence of Candida in saliva in patients using partial and total removable prosthesis, correlating at the found with advanced age and the salivar flow and factors that may influence its quantification. Species of the genus Candida are usually found in the microbiota of healthy patients, with C. Albicans being the most universal. The pathogenicity of the species occurs only if there are propitious conditions to its development, such as impairment of the immune system, hyposalivation and incorrect use of prostheses. Total prostheses, in particular, are associated with increased CFU and the presence of candidosis in the oral cavity. Methods ­ A total of 121 individuals were evaluated, 31 from the control group and 90 users of dental prostheses. Saliva collection was performed from each patient at the time of the first dental appointment and the patients were classified as reduced, normal and increased salivary flow. Microbiological analysis was performed with the same saliva used for salivary flow evaluation. These were sown and Candida colonies were quantified and patients were categorized as negative, carrier and positive. Results ­ It was possible to have a strong relationship regarding the decrease in salivary flow associated with advanced age and, as a result, with the amount of Candida CFU in the saliva of the studied patients. Conclusion ­ Thus, it is proven that patients using removable prostheses are the ones with the highest amount of CFU, followed by patients using total prosthesis

Asunto(s)

RESUMEN

A instalação imediata de implantes em região estética é uma prática frequente, pois reduzir a remodelação óssea e tecidual. Os implantes com interface cone Morse apresentam resultados biológicos e estéticos satisfatórios a longo prazo, pois apresentam gap reduzido entre implante e componente protético e a interface fica distante do tecido ósseo. Este artigo tem como objetivo relatar a reabilitação estética de um incisivo central superior comprometido através da instalação de um implante cone Morse utilizando a técnica da cirurgia guiada com provisionalização imediata. Paciente com 40 anos de idade, do sexo masculino, apresentava incisivo central superior (#21) com tratamento endodôntico prévio, recessão gengival vestibular, escurecimento coronário e mobilidade. O caso clínico apresentado mostrou que, após 12 meses, resultados precisos e estéticos são possíveis de alcançar com a instalação de implantes em alvéolos pós-extração e instalação de um dente provisório imediato em regiões estéticas.

The immediate placement of implant in fresh sockets in the aesthetic area is a frequent practice as it reduces bone and tissue remodeling. Morse taper implants present satisfactory biological and aesthetic results in the long term, since they present a reduced gap between implant and prosthetic component and this interface is distant from bone. This article aims to report the aesthetic restoration of a compromised central upper incisor with the placement of a Morse taper implant using guided surgery with immediate provision. A 40-year-old male patient had a central upper incisor (#21) with previous endodontic treatment, vestibular gingival recession, coronary browning, and mobility. The clinical case presented showed that, after 12 months, precise and aesthetic results are possible to achieve with the placement of implants in post-extracting alveolus and installation of an immediate provisional tooth in esthetic regions.

RESUMEN

A perda de tecido ósseo e gengival na região anterior é um desafio para o clínico devido as exigências estéticas do sorriso, essa perda de tecido de sustentação cria uma relação desarmônica entre as coroas clínicas e ameias interdentais. O objetivo deste estudo é relatar o caso clínico de uma reabilitação maxilar anterior através de uma prótese dentogengival sobre implantes (PDGI). O tratamento realizado após o diagnóstico clínico consistiu na realização de moldagens de estudo, fotografias para o planejamento digital (DSD), confecção dos provisórios, abertura dos implantes, escolha dos pilares protéticos, colocação dos provisórios sobre os implantes, remodelação gengival com provisórios, moldagem de trabalho, ajustes e prova da porcelana, parafusamento da prótese sobre implante e preservação do paciente. Essa reabilitação pode ser uma alterativa viável para substituição de tecido gengival e ósseo perdido, quando a regeneração não tiver um prognóstico favorável ou em pacientes que não desejam ou não podem submeter-se a procedimentos regenerativos. Concluímos que a PDGI melhorou de maneira significativa tanto os requisitos estéticos como funcionais do paciente(AU)

The loss of the bone and gingival tissue in the frontal zone is a challenge to the clinician due to the smiling aesthetic requirements. The loss of the teeth sustentation tissue creates an inharmonic relation between the clinical crowns and the interdental niches. The purpose of this study is to report a clinical case of aesthetic rehabilitation of the anterior maxillary through dentogingival prosthesis on implants. The treatment accomplished after the clinical diagnosis consisted in molding study, taking pictures for digital planning (DSD), confection of the provisional ones, opening the dental implant, assorting of the prosthetic abutments, placing the dental abutment on the dental implant, gingival remodeling with provisional ones, molding work, adjusting and testing the porcelain crown, screw driving the prosthesis on the implant and preserving the patient. This rehabilitation may be a viable alternative to replacing both the gingival and bone tissue when regeneration does not have a favorable prognosis, or in patients whom do not wish or cannot undergo regenerative procedures. We conclude that dentogingival prosthesis on implant has significantly improved both the functional and aesthetic requirements of the patient(AU)

Asunto(s)

RESUMEN

Pouca informação encontra-se disponível sobre a influência dos diferentes tratamentos de superfície das restaurações de resina indireta na resistência de união com as resinas diretas usadas para reparo. O objetivo deste estudo foi avaliar a influência de diferentes técnicas com uso do silano no reparo da resina indireta Ceramage na resistência ao cisalhamento e no padrão de fratura com a resina composta direta Filtek Z350. Blocos de resina composta indireta Ceramage (SHOFU) foram confeccionados e envelhecidos por 3 semanas em água destilada à 37°C. Posteriormente, foram jateados com óxido de alumínio e distribuídos aleatoriamente em 4 grupos de 10. No grupo 1, a superfície da resina Ceramage recebeu o adesivo convencional Adper Single Bond 2 (3M ESPE). No grupo 2 foi aplicado adesivo universal Adper Single Bond Universal (3M ESPE). Nos grupos 3 e 4, foi feita a aplicação do silano Silano Mais (Dentsply Sirona) e dos adesivos convencional e universal respectivamente. Foram confeccionados cilindros de resina composta direta Filtek Z350 (3M ESPE) na superfície da resina indireta Ceramage em todos os espécimes. Em seguida foi feito o teste de cisalhamento na máquina de teste universal (EMIC) após o armazenamento dos espécimes em água destilada à 37°C por 24 horas. O estereomicroscópio foi utilizado para analisar as falhas. A análise estatística foi feita pelo teste estatístico de Kruskal-Wallis. Não houve uma diferença estatisticamente significativa (p>0,05) na resistência de união e no padrão de fratura entre as diferentes técnicas de aplicação do silano no tratamento de superfície. Concluiu-se que o uso do silano pode não ser imprescindível para aumentar a resistência de união do reparo da resina indireta Ceramage com a resina direta Filtek Z350. No entanto, clinicamente é provável que se tenha uma maior chance de sucesso no reparo com a aplicação do silano. (AU)

Just few information is available about the influence of different surface treatments of indirect resin restorations on bond strength to direct resins used for repair. The objective of this study was to evaluate the influence of different techniques with the use of silane on the shear bond strength and fracture pattern of indirect resin Ceramage to Filtek Z350 direct composite resin. Ceramage indirect composite blocks (SHOFU) were made and aged in distilled water at 37 ° C for 3 weeks. Subsequently, they were sandblasted with aluminum oxide and randomly divided into 4 groups of 10. In group 1, the surface of the Ceramage resin received the conventional adhesive Adper Single Bond 2 (3M ESPE). In group 2, Adper Universal Bond universal adhesive (3M ESPE) was applied. In groups 3 and 4, the Silano Mais silane (Dentsply Sirona) and the conventional and universal adhesives were applied respectively. Composite resins cylinder of Filtek Z350 (3M ESPE) were made on the surface of the indirect resin Ceramage in all specimens. The shear test was then performed on the universal test machine (EMIC) after their storage in destilled water at 37°C for 24 hours. The stereomicroscope was used to analyze the fractures. Statistical analysis was done by Kruskal-Wallis test. There were no statistically significant differences (p>0,05) in bond strength values and in fracture pattern between the different techniques of application of silane in surface treatment. It was concluded that the silane coupling agent would not be necessary for repairing indirect resin Ceramage with composte resin Filtek Z350. However, clinically it is likely to have a better chance of successful repair with silane application. (AU)

Asunto(s)

RESUMEN

Objective: To assess clinical and radiographic outcomes of short implants (length six mm) in the posterior region and early-loading with splinted fixed dental prostheses. Methods: Forty-five patients were recruited at 3 centers and 2-3 implants (diameter 4 mm, length 6 mm) were implanted in each case. Totally, ninty-five implants were placed, using one-stage surgery protocol and loaded with a screw-retained splinted fixed prosthesis 6 weeks later. Clinical and radiographic examinations were performed preoperatively, post-surgery, at loading, and 6, 12 and 24 months after prosthesis placement. Results: Four implants were removed before loading. A total of 36 patients with 76 implants completed the whole treatment and 2 year follow-up according to the research design. No implant was lost after loading, and the 2-year survival rate of the implant was 100%(76/76). In all cases, the response of swelling and pain after operation was mild, and the bone resorption around the implants was not obvious at 6 months [(0.04±0.29) mm], 1 year [(-0.11±0.44) mm], and 2 years [(0.00±0.53) mm] after loading. Bone loss less than 1.00 mm was found only in 26% (18/69) implants after 2 years of loading, and the height of the alveolar bone around 17% (12/69) of the implant increased. During 2-year follow-up, the probing depth of the implants increased by nearly 0.50 mm, but there was no clinical significance (P>0.05). Conclusions: The 2-year results of this study showed that the 6-mm-long implants can be a predictable procedure, especially in situations with limited bone height in posterior edentulous regions.

Asunto(s)

RESUMEN

Objective@#To assess clinical and radiographic outcomes of short implants (length six mm) in the posterior region and early-loading with splinted fixed dental prostheses.@*Methods@#Forty-five patients were recruited at 3 centers and 2-3 implants (diameter 4 mm, length 6 mm) were implanted in each case. Totally, ninty-five implants were placed, using one-stage surgery protocol and loaded with a screw-retained splinted fixed prosthesis 6 weeks later. Clinical and radiographic examinations were performed preoperatively, post-surgery, at loading, and 6, 12 and 24 months after prosthesis placement.@*Results@#Four implants were removed before loading. A total of 36 patients with 76 implants completed the whole treatment and 2 year follow-up according to the research design. No implant was lost after loading, and the 2-year survival rate of the implant was 100%(76/76). In all cases, the response of swelling and pain after operation was mild, and the bone resorption around the implants was not obvious at 6 months [(0.04±0.29) mm], 1 year [(-0.11±0.44) mm], and 2 years [(0.00±0.53) mm] after loading. Bone loss less than 1.00 mm was found only in 26% (18/69) implants after 2 years of loading, and the height of the alveolar bone around 17% (12/69) of the implant increased. During 2-year follow-up, the probing depth of the implants increased by nearly 0.50 mm, but there was no clinical significance (P>0.05).@*Conclusions@#The 2-year results of this study showed that the 6-mm-long implants can be a predictable procedure, especially in situations with limited bone height in posterior edentulous regions.

RESUMEN

OBJECTIVE: Different clinical problems may require a surgical approach to the dental arch, such as dentofacial orthopedics, implant-supported dental prothesis, maxillary orthodontics protraction, removable appliances, and posttraumatic dental reconstruction. The aim of this study is to analyze the dental arch size and type for supporting individual dental protheses. MATERIALS AND METHODS: In this study, the reference measurements on the length of the bony palate, maxillary intercanine width, maxillary intermolar width, and the ratio of the maxillary to the palatinal surface were studied in 120 bony palates using a computer software program. RESULTS: The average length of the bony palate, maxilla, and palatine was measured as 104.4 ± 30.3, 40.05 ± 4.05, and 15.00 ± 3.03 mm, respectively. The right and left sides of average width of intermaxillary distances were measured as 13.75 ± 1.50 and 12.51 ± 1.50 mm, respectively. The average width of intermolar distance was calculated as 19.82 ± 1.61 mm (right side) and 18.89 ± 1.69 mm (left side), respectively. The maxillary dentitions were classified as square (17%), round-square (63.5%), round (14.4%), and round V-shaped arches (5.1%). The round-square ones showed no prominent principal component. Among the maxillary arches, the round arches were characterized by small values and round V-shaped ones with the largest values. Asymmetry between the right and the left bony palate was observed. The areas with equal bony palate on both sides were present in 64.4% of the cases, and in 33.1% of the cases, bony palate was dominant on the right. CONCLUSIONS: The primary principle in reconstructive treatment should be describing geometrical forms and mathematical details of the bony palate. Three-dimensional reference values relative to the dental arch may increase the success of individual treatment of surgical procedures and reduce possible complications. With the help of certain software, this research has made possible to investigate the variability of the dental arch and calculate the variety in measurements and thereby determining the most appropriate implant position, optimizing the implant axis and defining the best surgical and prosthetic solution for the patient.

Asunto(s)

RESUMEN

O objetivo do estudo foi avaliar o comportamento mecânico de uma cerâmica, à base de dissilicato de lítio, em ensaio de flexão com as extremidades fixas. Este estudo particular tem similaridade com caso real de aplicação de prótese em pacientes, o que melhora a avaliação do material quando comparado a ensaios convecionais como o ensaio de flexão em três pontos, com viga simplesmente apoiada. Para isso os corpos de prova foram submetidos à três tipos de envelhecimento: ciclagem mecânica, ciclagem termomecânica, ambas de acordo com os protocolos utilizados na literatura, e ciclagem intrabucal. A ciclagem intrabucal foi realizada por meio da utilização de um dispositivo intrabucal semelhante a uma placa oclusal, na qual foram instalados os corpos de prova, por meio de um dispositivo metálico próprio. Estas placas foram utilizadas em dez voluntários por oito horas, durante o período noturno. As amostras foram posteriormente submetidas ao ensaio mecânico de flexão de três pontos com as extremidades engastadas, para avaliação da resistência residual. Os resultados de resistência residual foram submetidos à análise estatística descritiva (média e desvio padrão) e inferencial, mediante o teste paramétrico de análise de variância (ANOVA) um fator e o teste de Tukey ( = 0,05). As amostras representativas de cada grupo foram observadas em microscópio eletrônico de varredura para análise fractográfica. O tipo de ciclagem influenciou no comportamento mecânico da cerâmica, apresentando significância estatística (p = 0,000) e o grupo de ciclagem intrabucal mostrou a menor resistência à flexão. A origem da fratura foi na zona de tração, porém observou-se uma origem secundária localizada em zona de torção. Pode-se concluir que os tipos de ciclagens influenciaram no comportamento mecânico da cerâmica de dissilicato de lítio. As ciclagens mecânica, termomecânica e intrabucal reduziram a resistência à flexão do material. A ciclagem intrabucal foi a que mais reduziu a resistência residual em flexão deste tipo de cerâmica(AU)

This study aimed to evaluate the behavior of lithium disilicate ceramic in similar condition to a partial fixed prosthesis of three elements by subjecting to three types of aging (n=10): mechanical cycling, thermomechanical cycling, both according to the protocols used in the literature, and intraoral cycling. The intraoral cycling was accomplished by using an intraoral device, which is similar to an occlusal splint. They were installed with the samples (CP) by means of a metallic device that was fixed in balanced contact condition with the remainder of the occlusal surface of the plate. These plates were used in ten volunteers for eight hours during the evening. After fatigue, the samples were subjected to three-point bending tests with clamped ends to evaluate the residual strength. The residual strength results were submitted to descriptive statistics (mean and standard deviation) and inferential by the parametric analysis of variance (ANOVA), with one factor and Tukey test ( = 0.05). In addition, representative samples of each group were observed in a scanning electron microscope (SEM) for fractographic analysis. The cycling condition influenced the mechanical behavior of ceramic with statistical significance of (p = 0,000), and the intraoral cycling group showed the lowest residual flexural strength. In fractographic analysis, they showed that the origin of fracture was in the tensile zone, but there was a secondary fracture origin represented by a twisted zone. Therefore, all types of cycling influenced the flexural strength of the material(AU)

Asunto(s)

RESUMEN

A 43-year-old woman with a unilateral cleft lip and palate, presenting a totally edentulous maxilla and mandible with marked maxillomandibular discrepancy, attended the Prosthodontics section of the Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo for treatment. She could not close her mouth and was dissatisfied with her complete dentures. Treatment planning comprised placement of six implants in the maxilla, four in the mandible followed by prostheses installation and orthognathic surgery. The mandibular full arch prosthesis guided the occlusion for orthognathic positioning of the maxilla. The maxillary complete prosthesis was designed to assist the orthognathic surgery with a provisional prosthesis (no metal framework), allowing reverse treatment planning. Maxillary and mandibular realignment was performed. Three months later, a relapse in the position of the maxilla was observed, which was offset with a new maxillary prosthesis. This isa complex interdisciplinary treatment and two-year follow-up is presented and discussed. It should be considered that this type of treatment could also be applied in non-cleft patients.

Asunto(s)

RESUMEN

O câncer é uma patologia grave e o seu tratamento pode ser feito através de quimioterapia, radioterapia ou uma terapia combinada. O diagnóstico, o pré-tratamento e o tratamento são extremamente importantes para a prevenção das sequelas e para a qualidade de vida dos pacientes. A mucosite oral é um dos efeitos colaterais mais significativos da terapia contra o câncer. O risco para o desenvolvimento dessa condição, a sua gravidade e a duração dependem do tipo de tratamento realizado, idade, predisposição genética, saúde e higiene oral, a função secretora salivar, a alimentação, o uso de tabaco e álcool entre outros. Os sintomas podem variar de leve desconforto até uma dor intensa. O uso simultâneo da quimioterapia e da radioterapia resulta em um quadro de mucosite mais severo e prolongado. O objetivo desse estudo é informar sobre a mucosite oral, os seus fatores de risco, os seus sintomas e os possíveis tratamentos para essa condição.

Cancer is a severe pathology and its treatment generally includes radiotherapy, chemotherapy, surgery or a combination of them. The diagnosis, pre-treatment and treatment are extremely important to prevent the aftereffects and to provide better life quality to these patients. Oral mucositis is one of the most significant side effects in the therapy against cancer. The risk of developing this condition, its severity and duration depends on the type of the treatment performed, age, genetic predisposition, general health, oral hygiene, salivary secretory function, nutrition, smoking habit, alcohol abuse and other. Symptoms can range from mild discomfort to severe pain. Concurrent use of chemotherapy and radiotherapy results in more severe and prolonged mucositis. The aim of this study is to describe the mechanisms of oral mucositis, its risk factors, symptoms and possible treatments.

Asunto(s)

RESUMEN

Este trabalho se propôs a avaliar pacientes submetidos à colocação de implantes zigomáticos pela técnica de Stella & Warner, considerando a sobrevivência dos implantes convencionais e zigomáticos, a saúde do seio maxilar e o nível de satisfação dos pacientes em relação à reabilitação oral. Foram avaliados 28 pacientes, onde 14 haviam recebido implantes zigomáticos e convencionais, encontrando-se reabilitados com próteses totais fixas implantossuportadas (grupo 1) e 14 foram reabilitados somente com implantes convencionais e próteses totais fixas implantossuportadas (grupo 2). O estudo teve quatro fases, representadas pela avaliação radiográfica dos implantes (fase I), avaliação clínica (fase II), avaliação da saúde do seio maxilar (fase III) e aplicação de um questionário para mensurar a satisfação da reabilitação com prótese fixa total implanto-suportada (fase IV). O grupo 2 só foi submetido a fase IV, enquanto o grupo 1 participou de todas as etapas. Foram realizadas análises descritivas e estatísticas, tendo, esta última, utilizado o test t para amostras independentes na avaliação da fase IV. Os resultados demonstraram que a técnica de Stella & Warner mostrou-se efetiva, permitindo um elevado índice de sobrevivência dos implantes convencionais e zigomáticos (100%), considerando um período mínimo de acompanhamento de 15 meses e máximo de 53 meses após reabilitação protética. Não foram encontradas alterações patológicas nos tecidos periimplantares dos implantes convencionais e zigomáticos analisados. Os achados radiográficos mostraram níveis ósseos satisfatórios nos implantes convencionais das reabilitações orais com fixações zigomáticas e um bom posicionamento do ápice dos implantes zigomáticos em relação ao osso zigomático. A presença do implante zigomático não provocou sinusopatias e o teste t demonstrou um índice de satisfação inferior no grupo 1 quando comparado ao grupo 2. A colocação de implantes zigomáticos pela técnica de Stella & Warner mostrou ser uma técnica previsível, com alto índice de sobrevivência em pacientes com maxilas atróficas, sendo necessário um acompanhamento por longo prazo para confirmar os achados iniciais desse estudo. (AU)

This study aimed to evaluate patients who underwent placement of zygomatic implants technique by Stella & Warner, considering the survival of conventional and zygomatic implants, sinus health and level of patient satisfaction in relation to oral rehabilitation. We evaluated 28 patients where 14 had received conventional and zygomatic implants, being rehabilitated with implant-fixed dentures (group 1) and 14 were rehabilitated only with conventional implants and implant-fixed dentures (group 2). The study had four phases, represented by radiographic evaluation of implants (stage I), clinical evaluation (stage II), assessing the health of the maxillary sinus (stage III) and a questionnaire to measure satisfaction of rehabilitation with fixed prosthesis implant Total -backed (stage IV). Group 2 underwent only stage IV, while group 1 participated in all stages. Descriptive analysis and statistics were performed, using the t test for independent samples in the evaluation of phase IV. The results demonstrated that the technique of Stella & Warner proved effective, allowing a high survival rate of conventional implants and zygomatic (100%), considering a minimum follow-up of 15 months and maximum 53 months after prosthetic rehabilitation. There were no pathological changes in tissues periimplants conventional and zygomatic implants analyzed. Radiographic findings showed satisfactory levels bone implants in the oral rehabilitation with conventional zygomatic implants and a good positioning of the apex of the zygomatic implants over the zygomatic bone. The presence of the zygomatic implant did not cause sinus and the t test showed a satisfaction index lower in group 1 compared with group 2. The zygomatic implant placement technique by Stella & Warner proved to be a predictable technique with high survival rate in patients with atrophic jaws, necessitating long-term follow-up to confirm the initial findings of the study. (AU)

Asunto(s)