Ozone therapy improves early stages of osseointegration in ovariectomized rats.

OBJECTIVE: the aim of this study was to analyze the influence of ozone therapy (OZN) on peri-implant bone repair in critical bones by installing osseointegrated implants in the tibia of ovariectomized rats. METHODOLOGY: ovariectomy was performed on 30 Wistar rats, aged six months (Rattus novergicus), and, after 90 days, osseointegrated implants were installed in each tibial metaphysis. The study groups were divided into the animals that received intraperitoneal ozone at a concentration of 700 mcg/kg - OZ Group (n=15) - and a control group that received an intraperitoneal saline solution and, for this reason, was named the SAL group (n=15). The applications for both groups occurred during the immediate post-operative period on the 2nd, 4th, 6th, 8th, 10th, and 12th day post-surgery. At various stages (14, 42, and 60 days), the animals were euthanized, and tests were performed on their tibiae. These tests include histomorphometric and immunohistochemical analyses, computerized microtomography, sampling in light-cured resin for calcified sections, and confocal microscopy. The obtained data were then analyzed using One-way ANOVA and the Shapiro-Wilk, Kruskal-Wallis, and student t-tests (P<0.05). RESULTS: our findings indicate that the OZ group (3.26±0.20 mm) showed better cellular organization and bone neoformation at 14 days (SAL group, 0.90±1.42 mm) (P=0.001). Immunohistochemistry revealed that osteocalcin labeling was moderate in the OZ group and mild in the SAL group at 14 and 42 days post-surgery. The data from the analysis of calcified tissues (microtomography, histometric, and bone dynamism analysis) at 60 days showed no statistically significant differences between the groups (P=0.32). CONCLUSION: it was concluded that ozone therapy anticipated the initial phases of the peri-implant bone repair process.

Ozone therapy improves early stages of osseointegration in ovariectomized rats

Abstract Objective the aim of this study was to analyze the influence of ozone therapy (OZN) on peri-implant bone repair in critical bones by installing osseointegrated implants in the tibia of ovariectomized rats. Methodology ovariectomy was performed on 30 Wistar rats, aged six months (Rattus novergicus), and, after 90 days, osseointegrated implants were installed in each tibial metaphysis. The study groups were divided into the animals that received intraperitoneal ozone at a concentration of 700 mcg/kg — OZ Group (n=15) — and a control group that received an intraperitoneal saline solution and, for this reason, was named the SAL group (n=15). The applications for both groups occurred during the immediate post-operative period on the 2nd, 4th, 6th, 8th, 10th, and 12th day post-surgery. At various stages (14, 42, and 60 days), the animals were euthanized, and tests were performed on their tibiae. These tests include histomorphometric and immunohistochemical analyses, computerized microtomography, sampling in light-cured resin for calcified sections, and confocal microscopy. The obtained data were then analyzed using One-way ANOVA and the Shapiro-Wilk, Kruskal-Wallis, and student t-tests (P<0.05). Results our findings indicate that the OZ group (3.26±0.20 mm) showed better cellular organization and bone neoformation at 14 days (SAL group, 0.90±1.42 mm) (P=0.001). Immunohistochemistry revealed that osteocalcin labeling was moderate in the OZ group and mild in the SAL group at 14 and 42 days post-surgery. The data from the analysis of calcified tissues (microtomography, histometric, and bone dynamism analysis) at 60 days showed no statistically significant differences between the groups (P=0.32). Conclusion it was concluded that ozone therapy anticipated the initial phases of the peri-implant bone repair process.

Inflammatory Myofibroblastic Tumor: Rare Manifestation in Face.

Inflammatory myofibroblastic tumor, also known as inflammatory pseudotumor and plasma cell granuloma, is a tumor that occurs most often in the lungs, abdomen, skin, soft tissue, genital system, and mediastinal. Before surgery, the diagnosis is difficult to establish because of its diverse manifestations. In the head and neck, manifestation is rare and may occur in the upper respiratory tract, soft tissues, orbits, and skull base. This article aims to report a rare manifestation of the disease in the face, highlighting the importance of a correct diagnosis to determine the most appropriate form of treatment, in male patient, leucoderma, 22 years old, with complain of a painless unilateral growth in the left cheek, beginning 2 months before and with progressive growth.

Simultaneous Occurrence of Central Giant Cell Granuloma and Odontogenic Keratocyst in Mandible.

Odontogenic keratocysts and central giant cell granulomas are distinct entities of separate origin that may appear simultaneously in the jaw, making them difficult to differentiate. The objectives of this paper are to report a case of a 54-year-old man presenting with a large lesion in the right mandible and to describe the histological characteristics of that lesion. Imaging revealed tumefaction and multilobulation. The case was surgically managed. Histopathological examination revealed that the lesion was a hybrid of an odontogenic keratocyst and a central giant cell granuloma. It remains unclear as to whether this lesion represented a coincidental or related injury. Since both types of lesion involved have a high rate of recurrence, however, long-term follow-up is scheduled.

Non-familial Cherubism – Report of a case / Querubim não familiar - Relatório de caso

The Cherubism is a rare disease that affects the middle and lower third of the facein individuals at the time of childhood. It is a rarehereditary benign bone disease with an autosomal dominant inheritance. The familial distribution may affect different generations and isolated nonfamilial cases have also been reported in literature. Lesions appear as cystic multilocular radiolucencies, histologically, they resemble central giant cell granluloma and hyperpara thyroidism brown tumorwith numerous randomly distributed multinuclea tedgiant cells and vascular spaces within a fibrous connective tissue stroma. Objective: The aim of this study is to report the importance of the diagnosis of this pathology and the variety of treatments availablein the literature, thus guiding to an individualized treatment. Case Report: Caucasian 8 years-oldfemale, in good general condition, was referred to Service of Oral and Maxillofacial Surgery of Erasto Gaertner Hospital (EGH), Curitiba – PR, Brazil, complaining of bilateral swelling of the maxilla and mandible since 4 years-old. Apparently, the girl isthe first one who developed the genetic pathologyin at least 4 generations of her family. After biopsy, cherubism diagnosis was confirmed and the treatment of choice was periodic monitoring. Discussion: Cherubism studies with long-term follow-up with clinical and radiographic documentation indicate that the spontaneous resolution of bone lesions israre. Treatment of cherubism is controversial and various modalities have been reported as the use of calcitonin, osseous plasty surgery, curettage, orthognathic surgery, liposuction and palliative treatments. Conclusion: cherubism is a rarecondition that affects individuals in childhood that lead to some facial alterations, those patients need an special care and an well trained team to treat these disease more carefully and wisely noting that exist a series of option of new treatments in this cases...

Introdução: O Querubismo é uma doença rara que afeta o terço médio e inferior da face em indivíduos no momento da infância. É uma doença óssea hereditária benigna com herança autossômica dominante sendo que a distribuição familial pode afetar diferentes gerações, todavia casos não-familiares isolados também foram relatados na literatura. As lesões apresentam se radiograficamente como cistos multiloculados radiolúcidos e histologicamente se assemelham ao granuloma central de células gigantes e ao tumor marrom do hiper paratireoidismo com numerosas células gigantes multinucleadas distribuídos aleatoriamente e espaços vasculares dentro de um estroma de tecido conjuntivo fibroso. Objetivos: O objetivo deste estudo é relatar a importância do diagnóstico desta patologia e da variedade de tratamentos disponíveis na literatura, orientando dessa maneira a um tratamento individualizado. Relato de Caso: Mulher, caucasiana, 8 anos de idade, em bom estado geral. Foi encaminhada ao Serviço de Cirurgia Bucomaxilofacial do Hospital Erasto Gaertner (EGH), Curitiba - PR, Brasil, com queixa de inchaço bilateral da maxila e da mandíbula desde os 4 anos de idade. Em avaliação notou-se que menina é a primeira pessoa que desenvolveu a patologia empelo menos quatro gerações de sua família. Após biópsia o diagnóstico de cherubism foi confirmado e o tratamento de escolha foi a monitorização periódica. Discussão: estudos de cherubism a longo prazo de follow-up com documentação clínica e radiográficas indicam que a resolução espontânea das lesões ósseas são raras. O tratamento do cherubism é controverso e diversas modalidades têm sido relatados como o uso de calcitonina, a cirurgia de plastia óssea, curetagem cirurgia ortognática, lipoaspiração e tratamentos paliativos...

Implications of the use of bisphosphonates in dental treatment - experience of the service of oral and maxillofacial surgery, Erasto Gaertner Hospital, Curitiba, Brazil

Introduction: Bisphosphonates (BP) are effective drugs in the prevention and treatment of various bone pathologies, acting in the regulation of osteoclast function through different mechanisms. Despite the success in the treatment of various diseases, these drugs have the ability to induce an avascular necrosis of bone tissue, especially in the maxilla and mandible. Objective: Due the significant increase number of cases of patients with oral complications associated with BP therapy in the Department of Oral and Maxillofacial Surgery of the Erasto Gaertner Hospital, the study aimed to report our experience in the care of these patients. Material and methods: Patients submitted to BP therapy were enrolled prospectively between the years of 2011 and 2012. Clinical examination was performed in all patients to evaluate dental health as well oral mucosa. All patients are under follow-up in our service. Results: 26 patients who used BP were attended in the ambulatory. Twenty-three patients used BP for oncological indication and three for osteoporosis. Most of patients were women (6666%) with average age of 56 years old. The most frequent medication used was Pamidronate (54%), followed by Zoledronic acid (30%) and Alendronate (15%). Ten patients showed bone exposition, most of then in the mandible (80%), with an average time of one year of exposure. Conclusion: Dentists should advise their patients about the use of BP and the implications for oral health and treatments. These patients must have periodic consultations for evaluation and early detection of osteonecrosis associated to BP for adequate treatment.