RESUMEN
BACKGROUND: Heat shock proteins (HSPs) are released in response to stress situations, such as heat, inflammation, and infection. They are also involved in the tumor cell proliferation and prevention of apoptosis. Heat shock protein 105 (Hsp105/110) is a high-molecular-weight protein, which has been reported in many cancer types but few studies have been carried out on oral squamous cell carcinoma (OSCC). In the current study, we have focused on HSP105 expression on OSCC and evaluated their correlation with tumor clinicopathological parameters and patients' survival. METHODS: A retrospective study included 70 patients with OSCC of which 50 patients (71.4%) were male and 20 (28.6%) were female. The patient's information, including age, location, TNM stage, histological grade, regional metastasis, recurrence, and survival, were collected. Immunohistochemical staining for HSP105 was performed. The healthy oral mucosa (n = 10) was used as a control. The staining intensity and percentage of stained cells were semi-quantitatively evaluated, and HSP105 expression was correlated with tumor clinicopathological features and patient survival. RESULTS: Statistical analysis for HSP105 showed that there was no significant correlation with tumor clinicopathological features. However, HSP105 overexpression was associated with a decrease in the duration of patients' survival (P = .042). CONCLUSION: This result suggests that the increased expression of the HSP105 in the OSCC could be a prognostic factor for malignancy.
Asunto(s)
Carcinoma de Células Escamosas , Proteínas del Choque Térmico HSP110/genética , Neoplasias de la Boca , Carcinoma de Células Escamosas/genética , Femenino , Humanos , Masculino , Mucosa Bucal , Neoplasias de la Boca/genética , Recurrencia Local de Neoplasia , Pronóstico , Estudios RetrospectivosRESUMEN
OBJECTIVES: Actually, consensus management of osteonecrosis of the jaws (ONJ) related to nitrogen-containing bisphosphonates (NBPs) is mostly a conservative approach. It does not always control the symptoms and the progression of the disease. The aim of this study was to evaluate the clinical and radiological outcomes of three therapeutic management strategies of established ONJ. MATERIALS AND METHODS: Three treatment strategies, i.e., conservative approach, minimal invasive surgery, and extensive surgery were evaluated in 39 ONJ patients treated with NBPs for malignant diseases or osteoporosis. The patients were closely monitored, and the outcome (extension, improvement, or healing) of mucosa and bone was clinically and radiographically evaluated on a long-term period (27.05 ± 2.96 months). RESULTS: Primary pathology (osteoporosis or malignancies) and clinical severity of ONJ (mild, moderate, severe) were decisive factors. Osteoporotic patients showed more frequently complete mucosa or bone healing (p = 0.0128 and p = 0.00021, respectively) than malignant patients. Mucosa closure and bone improvement occurred more in mild ONJ patients than in severe ONJ (p = 0.0053 and p = 0.0319, respectively). Treatment strategy appeared to be a crucial factor for mucosa but not for bone healing. The rate of complete mucosa healing increased after an extensive surgical procedure (p = 0.0096). CONCLUSIONS: A surgical management of patients with ONJ positively influenced the clinical outcome by enhancing mucosa healing. CLINICAL RELEVANCE: These results deserve further investigations involving a larger cohort. However, they strongly suggest that the guidelines of management of patients with ONJ related to NBPs have to be reconsidered.
Asunto(s)
Osteonecrosis de los Maxilares Asociada a Difosfonatos/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Resultado del TratamientoRESUMEN
Osteonecrosis of the jaw (ONJ) can be associated with nitrogen-containing bisphosphonates (NBPs) therapy. Various mechanisms of NBP-associated ONJ have been proposed and there is currently no consensus of the underlying pathogenesis. The detailed medical and dental histories of 30 ONJ patients treated with NBPs for malignant diseases (24) or osteoporosis (6) were analyzed. The necrotic bone was resected and analyzed histologically after demineralization. In 10 patients the perinecrotic bone was also resected and processed without demineralization. Alveolar bone samples from 5 healthy patients were used as controls. In 14 ONJ patients, serial technetium-99m-methylene diphosphonate scintigraphic scans were also available and confronted to the other data. Strong radionuclide uptake was detected in some patients several months before clinical diagnosis of ONJ. The medullary spaces of the necrotic bone were filled with bacterial aggregates. In the perinecrotic bone, the bacteria-free bone marrow characteristically showed an inflammatory reaction. The number of medullary inflammatory cells taken as an index of inflammation allowed us to discriminate two inflammation grades in the ONJ samples. Low-grade inflammation, characterized by marrow fibrosis and low inflammatory cells infiltration, increased numbers of TRAP(+) mono- and multineacleated cells was seen in patients with bone exposure<2 cm(2). High-grade inflammation, associated with larger lesions, showed amounts of tartrate-resistant acid phosphatase(+)/calcitonin receptor(-) mono- and multinucleated cells, osteocyte apoptosis, hypervascularization and high inflammatory cell infiltration. The clinical extent of ONJ was statistically linked to the numbers of inflammatory cell. Taken together these data suggest that bone necrosis precedes clinical onset and is an inflammation-associated process. We hypothesize that from an initial focus, bone damage spreads centrifugally, both deeper into the jaw and towards the mucosa before the oral bone exposure and the clinical diagnosis of ONJ.
Asunto(s)
Difosfonatos/efectos adversos , Inflamación/complicaciones , Enfermedades Maxilomandibulares/inducido químicamente , Enfermedades Maxilomandibulares/complicaciones , Osteonecrosis/inducido químicamente , Osteonecrosis/complicaciones , Anciano , Anciano de 80 o más Años , Apoptosis , Femenino , Estudios de Seguimiento , Humanos , Inflamación/patología , Enfermedades Maxilomandibulares/diagnóstico por imagen , Enfermedades Maxilomandibulares/patología , Masculino , Persona de Mediana Edad , Necrosis , Osteocitos/patología , Osteonecrosis/diagnóstico por imagen , Osteonecrosis/patología , Fenotipo , Radiografía , Resultado del TratamientoRESUMEN
Crohn disease is a chronic granulomatous inflammatory disease of the gastrointestinal tract of unknown etiology. Oral lesions are significant, as they may occasionally precede intestinal and systemic manifestations. In this retrospective study, clinical and histopathologic data were reviewed from the files of 5 patients with Crohn disease diagnosed at the Department of Oral Medicine and Maxillofacial Pathology School of Dentistry, Aristotle University, Thessaloniki, Greece, and Division of Stomatology and Oral Surgery, Faculty of Medicine, University of Geneva, Switzerland. In the 5 patients, clinical signs included erosions, deep ulcers, cobblestoning of the buccal mucosa, mucosal tags, and lip swelling. Histopathologic examination revealed a granulomatous inflammation with noncaseating granulomas and deep fissuring of the oral mucosa. In all 5 patients, oral lesions were the early signs of the disease. The diagnosis of Crohn disease was confirmed by a colonoscopy and a biopsy of colonic lesions. Oral lesions may be significant and/or initial signs of Crohn disease. Recognition of the lesions may provide an early diagnosis.
Asunto(s)
Enfermedad de Crohn/complicaciones , Enfermedad de Crohn/diagnóstico , Granulomatosis Orofacial/etiología , Adulto , Femenino , Granulomatosis Orofacial/patología , Humanos , Masculino , Mucosa Bucal/patología , Estudios Retrospectivos , Adulto JovenRESUMEN
Bisphosphonates (BP) are the current standard of care for preventing malignant skeletal related-events. Recent reports have documented the relationship between osteonecrosis of the jaws (ONJ) and the use of BPs. Based on the opinion of experts, the purpose of our analysis was to summarize current knowledge, to propose therapeutic options, and to define areas of research. Identified risk factors were long-lasting exposure to BPs, intravenous nitrogen-containing BPs, and poor dental status. Three major hypotheses could explain the genesis of ONJ: excess of bone turnover inhibition, antiangiogenic effect, and local infection. Before the onset of therapy, the dental status must be controlled, and followed during treatment. Dental procedures could worsen the risk of ONJ, and indications must be well evaluated. When an ONJ occurs, the management should be adapted according to its extent. Thereby, a customization of BP therapy should be applied taking into account the aggressiveness of the underlying disease.
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Neoplasias Óseas/tratamiento farmacológico , Difosfonatos/efectos adversos , Enfermedades Maxilomandibulares/terapia , Osteonecrosis/terapia , Difosfonatos/uso terapéutico , Humanos , Incidencia , Enfermedades Maxilomandibulares/inducido químicamente , Enfermedades Maxilomandibulares/diagnóstico , Enfermedades Maxilomandibulares/fisiopatología , Osteonecrosis/inducido químicamente , Osteonecrosis/diagnóstico , Osteonecrosis/fisiopatologíaAsunto(s)
Anticuerpos Monoclonales/administración & dosificación , Enfermedades del Esófago/tratamiento farmacológico , Inmunosupresores/administración & dosificación , Liquen Plano/tratamiento farmacológico , Anticuerpos Monoclonales de Origen Murino , Biopsia con Aguja , Trastornos de Deglución/diagnóstico , Trastornos de Deglución/etiología , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Enfermedades del Esófago/diagnóstico , Esofagoscopía/métodos , Femenino , Estudios de Seguimiento , Humanos , Inmunohistoquímica , Infusiones Intravenosas , Liquen Plano/diagnóstico , Persona de Mediana Edad , Rituximab , Índice de Severidad de la Enfermedad , Resultado del TratamientoRESUMEN
Oral lichen planus (OLP) is a chronic inflammatory disease of unknown cause, which possesses the potential for malignant transformation. Cyclooxygenases (COX) 1 and 2 are two enzymes known to convert arachidonic acid into prostaglandins. Recent studies have shown an overexpression of COX-2 in oral squamous cell carcinoma and its precursor lesions. The present study investigated the expression of the COX-2 protein in OLP by Western blot analysis. Thirty patients with different degrees of histologically confirmed disease activity participated in the study: 9 patients had a recent onset of active OLP, 12 patients had atrophic OLP with moderate or low activity, and 9 patients presented with atrophic OLP with complete loss of activity. The results showed a high expression of COX-2 in all OLP patients in comparison with the control group. The differences in COX-2 expression in the various stages of OLP were not statistically significant. In conclusion, our results suggest that COX-2 is present during the various clinical forms of OLP. The resulting sustained overexpression of COX-2 in the late stage of the disease could play a role in the malignant transformation of some OLP.
Asunto(s)
Ciclooxigenasa 2/metabolismo , Mediadores de Inflamación/metabolismo , Liquen Plano Oral/metabolismo , Liquen Plano Oral/patología , Adulto , Anciano , Análisis de Varianza , Western Blotting , Estudios de Casos y Controles , Estudios de Cohortes , Progresión de la Enfermedad , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Probabilidad , Medición de Riesgo , Índice de Severidad de la EnfermedadRESUMEN
The peripheral giant cell granuloma (PGCG) is a benign hyperplastic gingival lesion of unknown aetiology occurring mostly in adults. A few cases have been described in children where a more aggressive clinical behaviour has been observed. In this paper, we report a case of PGCG localized in the anterior region of the maxilla of a 6-year-old boy which developed 6 months following a traumatic event. Early detection and treatment of PGCG is important to reduce possible dento-alveolar complications such as bone loss or displacement of dental germs or teeth.
Asunto(s)
Diente Canino/lesiones , Enfermedades de las Encías/etiología , Granuloma de Células Gigantes/etiología , Incisivo/lesiones , Avulsión de Diente/complicaciones , Diente Primario/lesiones , Niño , Fibroblastos/patología , Estudios de Seguimiento , Células Gigantes/patología , Enfermedades de las Encías/patología , Hiperplasia Gingival/patología , Granuloma de Células Gigantes/patología , Humanos , MasculinoRESUMEN
This paper reports an implant periapical lesion (IPL) with a previously unreported etiology. The presence of an osteolytic area around the apex and around the middle portion of a stable Straumann hollow-screw implant was found on periapical radiographs 3.5 years after implant placement. Case management involved curettage of the soft tissue surrounding the implant apex as well as resection of the nonosseointegrated portion of the implant. Histopathologic examination revealed a connective fibrous tissue containing a dense chronic inflammatory infiltrate with a foreign-body material. Polarized light microscopy and Fourier transform infrared microspectroscopy identified the foreign-body material as starch particles. Etiology of this IPL was thus related to a foreign-body reaction to starch particles. This exogenous contamination probably originated from starch-coated gloves during the surgical procedure. This case report suggests that IPL may successfully be treated by debridement and implant resection instead of implant removal. Peri-implant apical soft tissue should be systematically submitted for histopathologic examination.
Asunto(s)
Coronas , Implantes Dentales de Diente Único/efectos adversos , Reacción a Cuerpo Extraño/etiología , Osteólisis/etiología , Periodontitis Periapical/etiología , Almidón/efectos adversos , Desbridamiento , Implantación Dental Endoósea , Femenino , Reacción a Cuerpo Extraño/inmunología , Reacción a Cuerpo Extraño/patología , Humanos , Maxilar , Persona de Mediana Edad , Osteólisis/cirugía , Periodontitis Periapical/inmunología , Periodontitis Periapical/patología , Periodontitis Periapical/cirugía , Almidón/inmunología , Resultado del TratamientoRESUMEN
PURPOSE: Evaluation of prosthetic complication was performed on 236 patients treated with 528 implants in an 8-year private practice experience. MATERIALS AND METHODS: The study sample included 55 overdentures (ODs) and 265 fixed partial dentures (FPDs). Among the latter, 231 FPDs were cemented and 34 were screw-retained. The type and frequency of prosthetic incidents were recorded, including adjustments and complications. Statistical analysis was performed using a chi-square test to identify risk factors associated with complications. RESULTS AND DISCUSSION: Over this period, 1 abut ment fractured and 2 became loose, leading to a cumulative implant component success rate of 99.2%. Patients with removable prostheses had more complications than those with fixed ones, 66.0% versus 11.5%; the difference was significant (P < .001). Posterior fixed prostheses had more complications than anterior ones, 11.0% versus 0%; however, the difference was not significant (P = .16). The complication rates for cemented and screw-retained prostheses did not differ significantly (10.4% versus 5.9%; P = .61). Prostheses with an extension cantilever had more complications, 29.4% versus 7.9%; the difference was significant (P = .01). In the OD group, the ball-retained prostheses had a significantly higher rate of complications than the bar-retained ones (77.5% versus 42.9%; P = .04). In the FPD group, complications were not recurrent; most occurred during the first 2 years, and the rate of complications did not increase with time. In the OD group, 1.3 incidents per prosthesis were recorded. Incidents were often recurrent, and the rate of complications did not decrease with time. CONCLUSIONS: Removable and fixed prostheses were associated with complications at different frequencies and of different types. In the removable group, adjustments and foreseeable complications were numerous, recurrent, and usually easy to manage. Bar-retained prostheses had fewer complications than ball-retained ones. In the fixed group, complications were limited in number and did not increase with time. Complications were restricted to the posterior region.
Asunto(s)
Pilares Dentales/efectos adversos , Implantes Dentales/efectos adversos , Fracaso de la Restauración Dental , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Cementación , Diseño de Prótesis Dental , Prótesis Dental de Soporte Implantado , Diseño de Dentadura , Retención de Dentadura , Prótesis de Recubrimiento , Dentadura Parcial Fija , Femenino , Estudios de Seguimiento , Humanos , Arcada Edéntula/rehabilitación , Arcada Parcialmente Edéntula/rehabilitación , Masculino , Persona de Mediana Edad , Práctica Privada , Factores de Riesgo , Propiedades de SuperficieRESUMEN
BACKGROUND: Lymphatic malformations are uncommon, hamartomatous, developmental aberrations of the lymphatic system. The case presented in this report is a rare solitary gingival involvement of a microcystic-type lymphatic malformation. METHODS: The lesion presented clinically as a small vesicular swelling of a buccal interdental papilla in a 16-year-old girl. Involved tissues were excised and submitted for routine histologic examination. The expression of the endothelial marker CD34 was investigated using immunohistochemical staining. RESULTS: A physical examination failed to reveal similar or other abnormalities elsewhere in the body of the patient, including the oral cavity. Histopathologic analysis of the specimen demonstrated the presence of subepithelial, thin-walled, distended vascular cavities forming confluent vesicles containing lymph. The dilated lymphatic formations were lined by flattened CD34-negative endothelial cells. These features were consistent with a microcystic gingival lymphatic malformation. To the best of our knowledge, only two additional reports of this malformation have been published to date, but both presented with bilateral gingival involvement. CONCLUSION: Even though lymphatic malformations are encountered very infrequently on gingiva, they should be considered in the differential diagnosis of related conditions with a vesicular clinical appearance.
Asunto(s)
Encía/anomalías , Tejido Linfoide/anomalías , Adolescente , Antígenos CD34/análisis , Células Endoteliales/patología , Endotelio Vascular/patología , Femenino , Estudios de Seguimiento , Encía/patología , Humanos , Tejido Linfoide/patologíaRESUMEN
This paper reports a 5-year life-table analysis on wide neck (WN) ITI implants placed in a private practice. In 212 patients, 263 implants were placed in the posterior region; 97% rehabilitated the molar area. Implants in the mandible and in the maxilla were 61.2% and 38.8%, respectively; the mean implant length was 9.7 and 8.9 mm, respectively. Eighty-nine percent sites had both vestibular and buccal bone lamellae > or =1 mm, 9.1% had one of them <1 mm and 1.9% had both lamellae <1 mm. Sinus perforation during surgery occurred in 52% of the maxillary implants. Prosthetic information was available for 249 implants; implants were involved in 157 single crowns (SC) and 80 fixed partial dentures (FPD). Radiographic analysis was performed on 102 implants that reached the 2-year control, and crestal bone loss (CBL) was measured. Results showed that five implants failed; the 5-year cumulative survival rate was 97.89%. The 1-year survival rate based on 259 implants was 98.8% and the 2-year survival rate based on 174 implants was 97.7%. In this 5-year timeframe, 94.3% of the SCs and 96.2% of the FPDs were free of complication. The mean CBL at the mesial and distal sides was 0.71 and 0.60 mm, respectively; bone losses >1 and >2 mm were recorded for 29.7% and 2.5% of the sides, respectively. This mid-term study showed that the WN ITI implants were highly predictable in private practice and that prosthetic complication in the molar area was an infrequent event.
Asunto(s)
Implantes Dentales , Diseño de Prótesis Dental , Adulto , Anciano , Anciano de 80 o más Años , Pérdida de Hueso Alveolar/diagnóstico por imagen , Diente Premolar , Densidad Ósea , Coronas/estadística & datos numéricos , Implantes Dentales/efectos adversos , Implantes Dentales/estadística & datos numéricos , Fracaso de la Restauración Dental , Dentadura Parcial Fija/estadística & datos numéricos , Femenino , Estudios de Seguimiento , Humanos , Tablas de Vida , Masculino , Mandíbula/diagnóstico por imagen , Mandíbula/cirugía , Maxilar/diagnóstico por imagen , Maxilar/cirugía , Seno Maxilar/lesiones , Persona de Mediana Edad , Diente Molar , Radiografía , Propiedades de Superficie , Análisis de SupervivenciaRESUMEN
BACKGROUND: This case series presents the polymorphic clinical characteristics of gingival acquired immunodeficieny syndrome (AIDS)-related Kaposi sarcoma (KS), a malignancy that is gradually becoming uncommon in developed nations. An up-to-date overview of the related epidemiology, etiopathogenesis, histopathology, and treatment is provided, along with a pictorial guide to ease clinical diagnosis. METHODS: The oral/maxillofacial pathology records at Aristotle University and the University of Geneva were retrospectively reviewed. Thirty-two cases diagnosed with oral AIDS-related KS were retrieved between 1991 and 2004. KS diagnosis was established histologically by incisional biopsies from intraoral lesions. All charts contained clinical oral examination data, radiological images, and detailed photographic records. RESULTS: Thirteen patients (12 males and one female) presented with KS gingival involvement (40.6%). Eleven of the male patients were homosexual/bisexual men. The mean age of the patients at the time of intraoral KS diagnosis was 42.1 years, and the mean CD4 cell count was 103 (0 to 481). Gingival epidemic KS presented with various degrees of pigmentation and a wide range of clinical patterns, from relatively flat macules (early stage) to tumors with variable nodular morphology (advanced disease). Solitary or multiple gingival involvement may appear concomitantly with palatal and/or cutaneous lesions. CONCLUSIONS: Even though the incidence of intraoral KS had fallen precipitously in developed countries after the mid-1990s, gingival KS should be considered in the differential diagnosis of every pigmented gingival lesion. Periodontists are in a unique position to identify gingival involvement of intraoral KS and facilitate early diagnosis.
Asunto(s)
Infecciones Oportunistas Relacionadas con el SIDA/patología , Neoplasias Gingivales/patología , Sarcoma de Kaposi/patología , Infecciones Oportunistas Relacionadas con el SIDA/tratamiento farmacológico , Infecciones Oportunistas Relacionadas con el SIDA/epidemiología , Infecciones Oportunistas Relacionadas con el SIDA/virología , Adulto , África/epidemiología , Terapia Antirretroviral Altamente Activa , Diagnóstico Diferencial , Femenino , Neoplasias Gingivales/tratamiento farmacológico , Neoplasias Gingivales/epidemiología , Neoplasias Gingivales/virología , Herpesvirus Humano 8 , Humanos , Masculino , Persona de Mediana Edad , Mucosa Bucal/patología , Neoplasias Palatinas/tratamiento farmacológico , Neoplasias Palatinas/epidemiología , Neoplasias Palatinas/patología , Neoplasias Palatinas/virología , Estudios Retrospectivos , Sarcoma de Kaposi/tratamiento farmacológico , Sarcoma de Kaposi/epidemiología , Sarcoma de Kaposi/virología , Estados Unidos/epidemiologíaRESUMEN
Sialolithiasis is the main pathology of major salivary glands. Sialolithiasis of minor salivary glands is, however, generally considered to be extremely rare. Lithiasis of accessory salivary glands apparently occurs more frequently than alleged and therefore should be included in differential diagnosis of tumors of the oral mucous membrane. The elementary lesion consists of a firm nodule located under the mucosal membrane on the upper lip or cheek. Nodules should be excised and examined by histopathology.
Asunto(s)
Cálculos de las Glándulas Salivales/patología , Glándulas Salivales Menores/patología , HumanosRESUMEN
OBJECTIVE: Currently, practitioners use clinical and histopathologic examination to diagnose a caliber-persistent labial artery (CPLA). We illustrate the use of ultrasonography as a noninvasive diagnostic tool to visualize this enlarged artery of the lip. METHODS: We examined the lips of 3 patients with a suspected CPLA. We localized and determined the extension of the intralabial artery with ultrasonography, including pulsed and color Doppler analysis. We compared the sonograms to the clinical and histopathologic findings. RESULTS: Sonograms showed clear enlargement of the labial artery in the 3 cases. The course of the constant-diameter artery was either vertical or oblique from the depth of the lip to the surface of the mucosa. This vascular abnormality was confirmed by histopathologic examination. CONCLUSIONS: Ultrasonography and color Doppler imaging may be useful noninvasive tools for the diagnosis and preoperative evaluation, as well as the follow-up, of labial lesions related to a CPLA, thus eliminating the need for diagnostic surgery in typical pulsatile nodules. Ultrasonography may help distinguish a CPLA from other vascular lesions of the lip such as an aneurysm. Atypical cases or chronic ulcerations mimicking a cancer should undergo biopsy so that a malignant process is not missed.
Asunto(s)
Enfermedades de los Labios/diagnóstico por imagen , Labio/irrigación sanguínea , Labio/diagnóstico por imagen , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Flujo Pulsátil , Recurrencia , UltrasonografíaRESUMEN
The purpose of the present clinical study was (1) to evaluate the Osstell as a diagnostic tool capable of differentiating between stable and mobile ITI implants, (2) to evaluate a cut-off threshold implant stability quotient (ISQ) value obtained at implant placement (ISQitv) that might be predictive of osseointegration, (3) to compare the predictive ISQitv of immediately loaded (IL) implants and implants loaded after 3 months (DL). Two patient groups were enrolled, 18 patients received 63 IL implants and 18 patients were treated with 43 DL implants. The ISQ was recorded at implant placement, after 1, 2, 4, 6, 8, 10 and 12 weeks. All implants passed the 1-year loading control. Two implants failed, one DL implant with ISQ at placement (ISQi) of 48 and one IL implant with ISQi of 53. The resonance-frequency analysis (RFA) method was not a reliable diagnostic tool to identify mobile implants. However, implant stability could be reliably determined for implants displaying an ISQ> or =47. After 1 year of loading, all DL implants with an ISQi> or =49 and all IL implants with an ISQi> or =54 achieved and maintained osseointegration. By the end of 3 months, implants with ISQi<60 had an increase of stability. Implants with ISQi 60-69 had their stability decrease during 8 weeks before returning to their initial values. Implants with ISQ>69 had their stability decrease during the first 4 weeks before remaining stable. Although preliminary, these data might orient the practitioner to choose among various loading protocols and to selectively monitor implants during the healing phase.
Asunto(s)
Pilares Dentales , Implantes Dentales , Retención de Prótesis Dentales , Oseointegración/fisiología , Diseño de Prótesis Dental , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Diseño de Dentadura , Dentadura Parcial Fija , Femenino , Estudios de Seguimiento , Predicción , Humanos , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Estrés Mecánico , VibraciónRESUMEN
The purpose of the present study was (1) to measure the primary stability of ITI implants placed in both jaws and determine the factors that affect the implant stability quotient (ISQ) determined by the resonance frequency method and (2) to monitor implant stability during the first 3 months of healing and evaluate any difference between immediately loaded (IL) implants and standard delayed loaded (DL) implants. The IL and DL groups consisted of 18 patients/63 implants and 18 patients/43 implants. IL implants were loaded after 2 days; DL implants were left to heal according to the one-stage procedure. The ISQ was recorded with an Osstell apparatus (Integration Diagnostics AB, Gothenburg, Sweden) at implant placement, after 1, 2, 4, 6, 8, 10 and 12 weeks. Primary stability was affected by the jaw and the bone type. The ISQ was higher in the mandible (59.8+/-6.7) than the maxilla (55.0+/-6.8). The ISQ was significantly higher in type I bone (62.8+/-7.2) than in type III bone (56.0+/-7.8). The implant position, implant length, implant diameter and implant deepening (esthetic plus implants) did not affect primary stability. After 3 months, the gain in stability was higher in the mandible than in the maxilla. The influence of bone type was leveled off and bone quality did not affect implant stability. The resonance-frequency analysis method did not reveal any difference in implant stability between the IL and DL implants over the healing period. Implant stability remained constant or increased slightly during the first 4-6 weeks and then increased more markedly. One DL and IL implant failed; both were 8 mm long placed in type III bone. At the 1-year control, the survival rate of the IL and the DL implants was 98.4% and 97.7%, respectively. This study showed no difference in implant stability between the IL and DL procedures over the first 3 months. IL short-span bridges placed in the posterior region and full arch rehabilitation of the maxilla with ITI sandblasted-and-etched implants were highly predictable.
Asunto(s)
Pilares Dentales , Implantes Dentales , Retención de Prótesis Dentales , Oseointegración/fisiología , Grabado Ácido Dental , Abrasión Dental por Aire , Densidad Ósea/fisiología , Diseño de Prótesis Dental , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Dentadura Parcial Fija , Femenino , Estudios de Seguimiento , Humanos , Masculino , Mandíbula/fisiopatología , Mandíbula/cirugía , Maxilar/fisiopatología , Maxilar/cirugía , Persona de Mediana Edad , Estadísticas no Paramétricas , Análisis de Supervivencia , Resultado del Tratamiento , Vibración , Cicatrización de Heridas/fisiologíaRESUMEN
OBJECTIVES: To report our experience of subacute necrotizing sialadenitis (SANS), an unusual lesion of the minor salivary palatal glands, and to discuss its relationship with necrotizing sialometaplasia (NS). DESIGN: A retrospective review of records for patients with SANS identified between 1996 and 2001. SETTING: Academic center, referral center, and an ambulatory care center. PATIENTS: Three patients (1 woman, 2 men), aged 22, 23, and 40 years at diagnosis. INTERVENTION: All 3 patients underwent incisional biopsy. MAIN OUTCOME MEASURES: Clinical description of SANS, ability to make the diagnosis preoperatively, clinical evolution, histologic features, and comparison with the much more frequent NS. RESULTS: Three patients presented with a lateral palatal nodule (1 case bilateral, 1 case ulcerated) of 7 to 10 days' duration, 0.8 to 1.0 cm in size, slightly or not painful. No patient was correctly diagnosed prior to undergoing a biopsy. In all 3 cases, the biopsy specimen showed acinic necrosis surrounded by a dense polymorphous inflammatory infiltrate with atrophy of ductal cells but no squamous metaplasia. Healing occurred without any further treatment in up to 3 weeks. No recurrence was observed in 2 cases; 1 patient was lost to follow-up. CONCLUSIONS: SANS is a painful spontaneously resolving necrosis of the palatal salivary glands, easily misdiagnosed preoperatively. The main differences from NS are smaller size of lesion, scarcity of ulceration, and absence of squamous metaplasia. Although initially described as a new autonomous entity, SANS might be an early or minimal form of NS.