Does Subcrestal Position Affect Insertion Torque of Different Implant Designs at Different Bone Densities? An In Vitro Model Study.

PURPOSE: To evaluate the insertion torque at the equicrestal and subcrestal positions of three implant designs in synthetic polyurethane blocks simulating different bone conditions. MATERIALS AND METHODS: Overall, 72 implants with three different designs (two conical and one cylindrical) were inserted at equicrestal and subcrestal positions (-2 mm) into polyurethane blocks simulating the anterior (0.32 g/cm3) and posterior (0.48 g/cm3) regions of the maxilla. The final insertion torque of all implants was measured using a digital torque meter, and the results were evaluated and statistically analyzed. RESULTS: For all implant systems, insertion torque decreased significantly when placed at the subcrestal position (P < .05), except for cylindrical implants placed in the bone blocks with high cancellous density. The implants with higher body conicity and square threads had higher insertion torque values than the cylindrical and conical implants with a lower body conical angle and trapezoidal threads. The implants inserted into higher-density blocks showed greater stability. CONCLUSION: The different implant systems lost insertion torque in a nonuniform manner at the subcrestal position and varied according to bone density. Implant design significantly influenced the initial stability at the equicrestal and subcrestal positions, especially in lower-density bone.

Lesión bucal relacionada con relleno dérmico / Dermal filler-related oral lesion

Introduction: Oral adverse reactions related to natural dermal fillers may originate from infiltration techniques, giving rise to swellings, nodule formation doe to local material entrapment, or displacement or migration of the material used. Objective: describe a case of orofacial foreign body reaction in an elderly patient. Case report: a 65-year-old woman was referred for oral evaluation complaining of an intraoral lesion present for 15 days. Intraoral examination revealed a mobile nodule in the lower lip left portion. After the initial consultation, incisional biopsy was performed under local anesthesia and the surgical specimen was sent for histopathological analysis. Intraoral examination revealed a soft mobile nodule in the lower lip left portion. Clinical pathological and Raman microspectroscopy analysis led to a final diagnosis of calcium hydroxyapatite dermal filler-related reaction. Conclusions: this case reinforces the possibility of dermal filler-related mucosal tissue reactions in oral cavity soft tissues(AU)

Introducción: las reacciones adversas bucales relacionadas con rellenos dérmicos naturales pueden originarse a partir de técnicas de infiltración, lo que ocasiona inflamaciones, formación de nódulos por atrapamiento de material local o desplazamiento o migración del material usado. Objetivo: describir un caso de reacción a cuerpo extraño bucofacial en un adulto mayor. Presentación del caso: una mujer de 65 años de edad fue remitida para evaluación bucal por presentar una lesión intrabucal durante 15 días. El examen intrabucal reveló un nódulo móvil en la porción izquierda del labio inferior. Después de la consulta inicial, se realizó una biopsia incisional bajo anestesia local y se envió la muestra quirúrgica para su análisis histopatológico. El examen intrabucal reveló un nódulo móvil suave en la porción izquierda del labio inferior. El análisis clínico-patológico y de la micro-espectroscopia de Raman condujeron a un diagnóstico final de reacción de hidroxiapatita cálcica relacionada con el relleno dérmico. Conclusiones: este caso refuerza la posibilidad de reacciones cutáneas relacionadas con los rellenos dérmicos en los tejidos mucosos de la cavidad bucal(AU)

Lesión bucal relacionada con relleno dérmico / Dermal filler-related oral lesion

Introduction: Oral adverse reactions related to natural dermal fillers may originate from infiltration techniques, giving rise to swellings, nodule formation doe to local material entrapment, or displacement or migration of the material used. Objective: describe a case of orofacial foreign body reaction in an elderly patient. Case report: a 65-year-old woman was referred for oral evaluation complaining of an intraoral lesion present for 15 days. Intraoral examination revealed a mobile nodule in the lower lip left portion. After the initial consultation, incisional biopsy was performed under local anesthesia and the surgical specimen was sent for histopathological analysis. Intraoral examination revealed a soft mobile nodule in the lower lip left portion. Clinical pathological and Raman microspectroscopy analysis led to a final diagnosis of calcium hydroxyapatite dermal filler-related reaction. Conclusions: this case reinforces the possibility of dermal filler-related mucosal tissue reactions in oral cavity soft tissues(AU)

Introducción: las reacciones adversas bucales relacionadas con rellenos dérmicos naturales pueden originarse a partir de técnicas de infiltración, lo que ocasiona inflamaciones, formación de nódulos por atrapamiento de material local o desplazamiento o migración del material usado. Objetivo: describir un caso de reacción a cuerpo extraño bucofacial en un adulto mayor. Presentación del caso: una mujer de 65 años de edad fue remitida para evaluación bucal por presentar una lesión intrabucal durante 15 días. El examen intrabucal reveló un nódulo móvil en la porción izquierda del labio inferior. Después de la consulta inicial, se realizó una biopsia incisional bajo anestesia local y se envió la muestra quirúrgica para su análisis histopatológico. El examen intrabucal reveló un nódulo móvil suave en la porción izquierda del labio inferior. El análisis clínico-patológico y de la micro-espectroscopia de Raman condujeron a un diagnóstico final de reacción de hidroxiapatita cálcica relacionada con el relleno dérmico. Conclusiones: este caso refuerza la posibilidad de reacciones cutáneas relacionadas con los rellenos dérmicos en los tejidos mucosos de la cavidad bucal(AU)

Clinical aspects, imaging features, and considerations on bisphosphonate-related osteonecrosis risk in a pediatric patient with osteogenesis imperfecta.

Osteogenesis imperfecta (OI) is a rare hereditary condition caused by changes in collagen metabolism. It is classified into four types according to clinical, genetic, and radiological criteria. Clinically, bone fragility, short stature, blue sclerae, and locomotion difficulties may be observed in this disease. OI is often associated to severe dental problems, such as dentinogenesis imperfecta (DI) and malocclusions. Radiographically, affected teeth may have crowns with bulbous appearance, accentuated constriction in the cementoenamel junction, narrowed roots, large root canals due to defective dentin formation, and taurodontism (enlarged pulp chambers). There is no definitive cure, but bisphosphonate therapy is reported to improve bone quality; however, there is a potential risk of bisphosphonate-related osteonecrosis of the jaw. In this study we report a case of OI in a male pediatric patient with no family history of OI who was receiving ongoing treatment with intravenous perfusion of bisphosphonate and who required dental surgery. In addition, we discussed the clinical and imaging findings and briefly reviewed the literature.