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OBJECTIVE: To explore older adults' perceptions, motivations and reasons for using and not replacing old and worn complete dentures over prolonged periods. MATERIALS AND METHODS: In-depth, semi-structured interviews were conducted with Brazilian edentulous older adults who were wearing complete dentures which were at least 20 years old. A purposive sampling method was used to recruit participants from an existing waiting list of those referred to a hospital clinic for new dentures. The interviews were video-recorded, transcribed verbatim and analysed using thematic analysis. RESULTS: Sixty-two individuals were assessed and nine were included in the study, aged from 61 to 77 years (mean = 65.4), with seven (77.8%) of them women. The reported time using their current dentures ranged from 22 to 45 years (mean = 28). Content analysis revealed three main themes: the perception of the current dentures' condition after prolonged use; reasons for the prolonged use and non-replacement; and unsuccessful attempts to replace the dentures. Overall, participants acknowledged the poor condition of their dentures and did recognise the need for replacement. Several factors had prompted them to delay or temporarily forego replacement, with financial constraints being the main barrier. Some reported failed attempts to replace the dentures in the past years or months; however, challenging adaptation to the new prostheses led to them reverting back to their old dentures as a fallback solution. CONCLUSION: Factors influencing prolonged denture use in older adults include a complex interplay of financial aspects, treatment awareness, access and personal factors. Dental professionals can play a pivotal role in promoting timely denture adjustment or replacement by addressing these factors through patient education and personalised care.

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Introduction: The aim of this article was to evaluate the efficacy of photobiomodulation therapy (PBMT) in the alveolar tissue healing process post-extraction using infrared thermography (IT). Case Presentation: A 36-year-old male patient had teeth extractions (18 and 28). Four PBMT sessions (660 nm; 2 J per tooth) were performed in the region of tooth 28 and recorded with thermographic images to compare the healing process, bilaterally. In the first two postoperative sessions, the temperature was higher (hyperradiant) on the left side (treated). After the third laser application, the left side was hyporradiant. In later session, the treated side became hyperradiant compared to the control side. The alveolus of tooth 28 showed more rapid healing than tooth 18 over a period of 60 days. Conclusion: IT can be used to detect the favorable effect of PBMT on accelerating the healing process in the alveolus within 60 days after the tooth extraction.

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UNLABELLED: Adequate polymerization plays an important role on the longevity of the composite resin restorations. OBJECTIVES: The aim of this study was to evaluate the effect of light-curing units, curing mode techniques and storage media on sorption, solubility and biaxial flexural strength (BFS) of a composite resin. MATERIAL AND METHODS: Two hundred and forty specimens were made of one composite resin (Esthet-X) in a stainless steel mold (2 mm x 8 mm Ø), and divided into 24 groups (n=10) established according to the 4 study factors: light-curing units: quartz tungsten halogen (QTH) lamp and light-emitting diodes (LED); energy densities: 16 J/cm² and 20 J/cm²; curing modes: conventional (CM) and pulse-delay (PD); and permeants: deionized water and 75% ethanol for 28 days. Sorption and solubility tests were performed according to ISO 4049:2000 specifications. All specimens were then tested for BFS according to ASTM F394-78 specification. Data were analyzed by three-way ANOVA followed by Tukey, Kruskal-Wallis and Mann-Whitney tests (α=0.05). RESULTS: In general, no significant differences were found regarding sorption, solubility or BFS means for the light-curing units and curing modes (p>0.05). Only LED unit using 16 J/cm² and PD using 10 s produced higher sorption and solubility values than QTH. Otherwise, using CM (16 J/cm²), LED produced lower values of BFS than QTH (p<0.05). 75% ethanol permeant produced higher values of sorption and solubility and lower values of BFS than water (p<0.05). CONCLUSION: Ethanol storage media produced more damage on composite resin than water. In general the LED and QTH curing units using 16 and 20 J/cm² by CM and PD curing modes produced no influence on the sorption, solubility or BFS of the tested resin.

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Adequate polymerization plays an important role on the longevity of the composite resin restorations. OBJECTIVES: The aim of this study was to evaluate the effect of light-curing units, curing mode techniques and storage media on sorption, solubility and biaxial flexural strength (BFS) of a composite resin. MATERIAL AND METHODS: Two hundred and forty specimens were made of one composite resin (Esthet-X) in a stainless steel mold (2 mm x 8 mm Ø), and divided into 24 groups (n=10) established according to the 4 study factors: light-curing units: quartz tungsten halogen (QTH) lamp and light-emitting diodes (LED); energy densities: 16 J/cm² and 20 J/cm²; curing modes: conventional (CM) and pulse-delay (PD); and permeants: deionized water and 75% ethanol for 28 days. Sorption and solubility tests were performed according to ISO 4049:2000 specifications. All specimens were then tested for BFS according to ASTM F394-78 specification. Data were analyzed by three-way ANOVA followed by Tukey, Kruskal-Wallis and Mann-Whitney tests (α=0.05). RESULTS: In general, no significant differences were found regarding sorption, solubility or BFS means for the light-curing units and curing modes (p>0.05). Only LED unit using 16 J/cm² and PD using 10 s produced higher sorption and solubility values than QTH. Otherwise, using CM (16 J/cm²), LED produced lower values of BFS than QTH (p<0.05). 75% ethanol permeant produced higher values of sorption and solubility and lower values of BFS than water (p<0.05). CONCLUSION: Ethanol storage media produced more damage on composite resin than water. In general the LED and QTH curing units using 16 and 20 J/cm² by CM and PD curing modes produced no influence on the sorption, solubility or BFS of the tested resin.

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The purpose of this study was to verify the polymerization efficiency of two curing units through a ceramic barrier. Forty specimens apiece of two resin luting cements (AllCem and RelyX U100) were made in a stainless steel mold. The experimental group was photocured through a ceramic barrier, while the control group was photocured without a barrier. The specimens were stored in deionized water or 75% ethanol for 28 days and submitted to tests of sorption and solubility (ISO 4049:2000). Values obtained were subjected to ANOVA and Tukey multiple comparison tests (P < 0.05). RelyX U100 suffered more sorption and solubility than AllCem. The light sources did not influence sorption and solubility values, except for the specimens of RelyX U100 that were photocured with an LED unit through ceramic and stored in ethanol; these specimens demonstrated higher values than those photocured using a halogen lamp.

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The aim of this study was to assess polymerization ability of three light-curing units by evaluating the influence of the light source, curing regimen and permeant (water or ethanol) on sorption, solubility and amount of residual monomers of a dental adhesive. Specimens of Adper Single Bond 2 were fabricated using a stainless steel circular matrix (8 mm x 1 mm). One quartz-tungsten-halogen (QTH) lamp and two light-emitting diode (LED) device at three different curing regimes (L1 = 12 J; L2 = 24 J; L3 = 24 J) were used to cure the specimens. Specimens were stored in two types of permeants - deionized water or 75% ethanol - for two storage times (G1 =7 days; G2 = 30 days). The specimens underwent water sorption and solubility tests, according to ISO 4049:2000 standard. After storage, residual monomers were identified and quantified by high performance liquid chromatography (HPLC). For sorption, L1 showed the highest values and QTH, the lowest. For solubility, in ethanol-stored groups, L1 had also the highest values, and QTH, the lowest, and findings were significantly different from the other curing regimens. L1 leached significantly more monomers than the others, and QTH had the lowest results. In conclusion, the type of light source, the curing regimen and the permeant affected sorption, solubility and amount of residual monomers of the adhesive under study.

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Dentes natais são aqueles presentes na cavidade oral ao nascimento de etiologia desconhecida. Um ou dois dentes aparecem comumente na mandíbula (região de incisivos inferiores) podendo causar a doença de Riga-Fede, caracterizada por uma úlcera no ventre da língua relacionada ao trauma devido à presença desses dentes precoces, interferindo na alimentação da criança. Paciente HNS, dois meses de idade, gênero feminino, foi levado pela mãe à clínica de Odontopediatria, pois não conseguia mais se alimentar (mamar no seio materno). Realizou-se uma completa anamnese, na qual a mãe relatou a presença de dentes na cavidade oral do lactente, desde o nascimento, e de uma úlcera na língua. Ao exame clínico, observaram-se dois dentes na região de incisivos inferiores e a úlcera de Riga-Fede. Ao exame radiográfico constatou-se que os mesmos não eram supranumerários, e sim os dentes 71 e 81. Optou-se por mantê-los, já que eram os decíduos e estavam bem implantados. O tratamento preconizado foi o desgaste das incisais dos dentes com disco de Soflex® (3M ESPE, St Paul, Mn, USA) seguido de aplicação de verniz de flúor; prescrição de V.A.S.A. na úlcera, antes das mamadas e Oncilon A® (B-MF, São Paulo, Brasil) em orabase três vezes ao dia, por quatro dias. Dez dias após, a criança retornou para acompanhamento, a úlcera desapareceu e a abordagem mostrou-se indicada e eficaz.

Natal teeth are those present in the oral cavity at birth with unknown etiology. Generally, one or two teeth can appear in the mandibular incisor region and lead to Riga-Fede disease, which is characterized by an ulcer on the ventral surface of the tongue caused by the trauma due to this early tooth, affecting the child´s ability to suckle. Patient HNS, a two-month-old female, was taken by her mother to a pediatric dental clinic because she could not suckle. A complete interview was done, in which mother reported the presence of teeth in the child´s oral cavity and an ulcer on the tongue. Clinical examination revealed two teeth in the mandibular central incisor region and Riga-Fede disease. Radiographs revealed that those teeth were not supranumerary, but teeth 71 and 81. It was decided that they would remain in the oral cavity since they were the deciduous teeth and were well implanted. Treatment consisted of rounding the incisal edges of the teeth with a Sof-Lex® (3M ESPE, St Paul, Mn, USA) disc, followed by application of a fluorine varnish. Additionally, V.A.S.A. should be applied on the ulceration before breastfeeding and Orabase Oncilon A® (B-MF, São Paulo, Brasil) given three times a day for four days. Ten days later, the child returned for a follow-up visit. The ulcer had disappeared and the approach proved to be indicated and efficient.

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Este trabalho descreve uma sequencia clínica de restauração de cavidade de classe I, em que se utiliza a técnica de escultura progressiva com estratificação de cor. O dente selecionado para realização da sequencia é um primeiro molar inferior direito (46), com restauração de amálgama deficiente. Foram utilizadas as resinas A2D para dentina, W para caracterização das vertentes, A2E e CT para esmalte, todas Filtek Supreme (3M ESPE). Ao restaurar diretamente os dentes posteriores com resina composta, os cirurgiões-dentistas devem ter compreensão integral da morfologia do dente, combinada com as técnicas apropriadas, esboçadas no caso clínico, a fim de obter uma restauração estética aceitável. A técnica apresenta-se como ferramenta útil para os profissionais, pois fornece restaurações de alta qualidade, que reproduzem as propriedades ópticas e morfológicas dos tecidos dentários.

The aim of this article is to describe the clinical protocol of a Class I cavity restoration using the progressive sculpture with shade stratification. A right mandibular first molar (46) presenting a defective amalgam restoration was selected, and the shades were selected (A2D for dentin, W (white) for characterization, and A2E and CT for enamel, Filtek Supreme®, 3M ESPE). Dentists must have an integral understanding of tooth morphology when making direction restorations in posterior teeth using composite resin. This knowledge should be associated with appropriate techniques, to produce acceptable esthetic restorations which reproduce the optical and morphological properties of dental tissues.

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A hipoplasia do esmalte é uma formação incompleta ou deficiente da matriz orgânica do esmalte. Clinicamente, apresenta-se como manchas esbranquiçadas, rugosas, sulcos ou ranhuras, bem como, outras alterações na estrutura do esmalte, comprometendo a estética do sorriso. De acordo com o grau de severidade dessa anomalia, vários protocolos de tratamento podem ser realizados, desde clareamento, microabrasão, restaurações estéticas diretas e coroas unitárias. Desta forma, objetiva-se apresentar o diagnóstico e o tratamento restaurador estético de um caso clínico de hipoplasia do esmalte. Paciente gênero feminino procurou a FO-UFG queixando-se de manchas brancas nos dentes anteriores. Clinicamente, observou-se nos terços médio e incisal dos incisivos centrais superiores a presença de manchas esbranquiçadas profundas e leve alteração do contorno incisal, adotando-se um tratamento estético restaurador direto. As estruturas hipoplásicas nos dentes 11 e 21 foram desgastadas limitando-se à remoção da estrutura dentária afetada. Após o condicionamento ácido e aplicação do sistema adesivo, realizou-se a restauração com resina composta micro-híbrida pela estratificação da dentina e esmalte, seguido pelo acabamento e polimento das restaurações. A partir do tratamento pôde restabelecer a harmonia estética, propiciando significativo impacto positivo à auto-estima da paciente.

The enamel hypoplasia is an incomplete or deficient formation of the enamel organic matrix. It can appear by hereditary origin or by a consequence of systemic or local events that happen during teeth development. It comes as whitish, wrinkled, sulcus and grooves stains, as well as, other alterations in the enamel structure. Clinically, it appears with no enamel or just part of it, presenting an unsatisfactory aesthetics. In agreement with this anomaly degree of severity, several treatment protocols can be realized since whitening and microabrasion, until conservative aesthetic restorations and artificial crown. Therefore, the aim of this study is to present a clinical case that reports an option of enamel hypoplasia treatment. Female patient, 9, accompanied by her mother, sought the FO-UFG complaining about white stains in her permanents teeth. During the anamnesis the mother told that white stains just appeared in the moment of permanent incisors eruption. Clinically, it was observed in the middle and incisal thirds of the upper central incisors the presence of whitish spots profound and light alteration of the contour incisal, adopting a treatment is direct aesthetic restorative. The structures hypoplastic in 11 and 21 teeth were worn only to the removal of the affected tooth structure. After etching and application of adhesive system, there was the restoration with micro-hybrid resin composite by stratification of the enamel and dentin, followed by finishing and polishing of restorations. From the treatment could restore the aesthetic harmony, providing significant positive impact on self-esteem of the patient.

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The aim of this study was to assess polymerization ability of three light-curing units by evaluating the influence of the light source, curing regimen and permeant (water or ethanol) on sorption, solubility and amount of residual monomers of a dental adhesive. Specimens of Adper Single Bond 2 were fabricated using a stainless steel circular matrix (8 mm x 1 mm). One quartz-tungsten-halogen (QTH) lamp and two light-emitting diode (LED) device at three different curing regimes (L1 = 12 J; L2 = 24 J; L3 = 24 J) were used to cure the specimens. Specimens were stored in two types of permeants - deionized water or 75 percent ethanol - for two storage times (G1 =7 days; G2 = 30 days). The specimens underwent water sorption and solubility tests, according to ISO 4049:2000 standard. After storage, residual monomers were identified and quantified by high performance liquid chromatography (HPLC). For sorption, L1 showed the highest values and QTH, the lowest. For solubility, in ethanol-stored groups, L1 had also the highest values, and QTH, the lowest, and findings were significantly different from the other curing regimens. L1 leached significantly more monomers than the others, and QTH had the lowest results. In conclusion, the type of light source, the curing regimen and the permeant affected sorption, solubility and amount of residual monomers of the adhesive under study.

O objetivo deste estudo foi avaliar a capacidade de polimerização de três unidades fotopolimerizadoras por meio da análise da influência das fontes de luz, regimes de cura (QTH, L1, L2 e L3) e diferentes permeantes (água e etanol) na sorção, solubilidade e quantidade de monômeros residuais de um adesivo dentário. Espécimes de AdperTM Single Bond 2 foram feitos utilizando uma matriz circular de aço inoxidável (8 mm x 1 mm). Três fontes de luz, uma a base de luz halógena (QTH) e duas a base de diodos emissores de luz (LED), em três diferentes regimes de cura (L1 = 12J; L2 = 24J; L3 = 24J) foram usados para fotoativar os espécimes. Os espécimes foram armazenados em dois tipos de permeantes (água deionizada ou etanol a 75 por cento), por dois diferentes períodos de armazenamento (G1 =7 dias; G2 = 30 dias). Os espécimes foram submetidos a testes de sorção e solubilidade de acordo com a ISO 4049:2000. Após o período de armazenamento, os monômeros residuais foram identificados e quantificados por cromatografia líquida de alta eficiência (HPLC). Para sorção, L1 apresentou os maiores valores significantes e QTH os menores. Para solubilidade, nos grupos do etanol, L1 apresentou os maiores valores e QTH os menores e os achados foram estatisticamente diferentes dos outros regimes de cura. L1 extraiu significantemente mais monômeros do que os outros regimes e QTH teve os menores resultados. As fontes de luz, os regimes de polimerização e os diferentes permeantes influenciaram na sorção, solubilidade e quantidade de monômeros residuais extraídos do adesivo em estudo.

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