Chemical analysis of the surface of dental implants after contact with surgical gloves / Análise química da superfície de implantes dentários após contato com luvas cirúrgicas

Objective: To perform a chemical analysis of the surface of dental implants after contact with surgical gloves by scanning electron microscopy and energy dispersive spectroscopy (EDS) and to correlate the findings with literature data. Materials and methods: Five commercially pure titanium implants submitted to surface treatment by acid attack and one pair of sterile latex gloves were selected. First, the implant and gloves were analyzed separately by EDS in order to observe the chemical elements on their surfaces. Next, the implant surface was put in contact with the surgical glove and analyzed by EDS to identify possible contaminants left by the latex glove. Results: Calcium, Zn, Mg, S, Si, and Nb were detected on the surface of the surgical glove, with Ca and Zn being the predominant elements in all samples. Titanium was detected on all implants; two implants only exhibited this element as described by the manufacturer and three contained small amounts of Ca, but Ti was the prevalent element. After contact of the implants with the surgical glove, elements that had not been detected on the gloves and implants during separate analysis, such as S, Zn, Si and Ca, were found. Conclusion: The present results and literature data permit us to conclude that the surface of titanium implants was contaminated after contact with surgical gloves and that inorganic chemical elements can modify the titanium oxide layer, resulting in possible interferences with the process of osseointegration

Ameloblastic fibroma: A rare case report with 7-year follow-up

Introduction. Ameloblastic fibroma (AF) is a rare benign odontogenic tumor that usually occurs in the first two decades of life. It affects adolescents and young adults and is found in the mandible and with a higher frequency in the posterior region of this segment. There are rare case reports with a long-term follow-up. Case Outline. We report the case of a 6-year-old boy with extensive ameloblastic fibroma in the mandible. Treatment consisted of enucleation and bone curettage, with the preservation of permanent teeth adjacent to the tumor. Clinical and radiographic follow-up of the patient over a period of 7 years showed no signs of recurrence or malignant transformation. Conclusion. Patients with AF should be under follow-up for prolonged periods of time, even in cases exhibiting a low proliferation index, because of the potential for recurrence and malignant transformation of this tumor

Schwannoma of the oral cavity.Histological and immunohistochemical features

Schwannoma is a relatively uncommon, slowly growing lesion that is most commonly encountered in the nerve sheath. The mobile portion of the tongue is the most common site, followed by the palate, floor of mouth, buccal mucosa, lips, and jaws. The present case report refere a 13-year-old boy with a tongue mass that did not interfere with the speech. The histopathology and immunohistochemistry study of the excised lesion showed a Schwannoma of the tongue

APLICAÇÃO DA FIBRINA RICA EM PLAQUETAS EM CIRURGIA DE TERCEIROS MOLARES: AVALIAÇÃO DA DOR (PARTE II) APPLICATION OF PLATELET-RICH FIBRIN ON THIRD MOLAR SURGERY. PAIN EVALUATION (PART II)

Objetivo: Avaliar a influência do coágulo de fibrina rico em plaquetas (PRF) na intensidade da dor após exodontia de terceiros molares, e comparar, secundariamente, a necessidade do uso de medicamentos no pós- -operatório com e sem o uso da PRF. Materiais e Métodos: Os pacientes foram submetidos à extração bilateral dos terceiros molares inferiores em sessões diferentes com, no mínimo, 15 dias de intervalo entre si, resultando em dois grupos de análise. No grupo teste, o coágulo da PRF produzido foi levado ao alvéolo e, posteriormente suturado. No grupo controle não houve a adição da PRF previamente à sutura. Para a comparação da intensidade da dor entre o lado teste e o lado controle, foram feitas avaliações pós-operatórias com 24 horas, 48 horas e 7 dias por meio da Escala Visual Analógica (EVA). Os dados obtidos foram analisados estatisticamente através dos cálculos de frequência relativa e absoluta e para testar as diferenças entre as proporções dos eventos foi utilizado o teste Qui-quadrado. Resultados: No grupo controle não houve diferença estatisticamente significante entre a distribuição dos escores de dor em todos os períodos de avaliação, enquanto no grupo teste houve predominância do escore 1, demonstrando menor intensidade de dor. Todavia, quando comparados os grupos teste e controle, verificou-se que não houve diferença estatisticamente significante na intensidade da dor pós-operatória. Conclusão: A fibrina rica em plaquetas não apresentou influência na redução da sintomatologia dolorosa após exodontia de terceiros molares, contudo, tais resultados preliminares evidenciam a necessidade de maiores estudos acerca do tema.  Purpose: Evaluate the influence of Platelet-Rich Fibrin -PRF) clot on pain intensity after third molar extraction, and compare, secondarily, the use of post-operative drugs with PRF or not. Methods: Patients were submitted to bilateral extraction of the lower third molars in different sessions with, at least 15 days between each other, resulting in two groups of analysis: control (without PRF) and test (with PRF). In the test group, the PRF clot was taken to the alveolus and subsequently sutured. In the control group there was no addition of PRF. To compare pain intensity between the test side and the control side, postoperative evaluations were performed at 24 hours, 48 hours and 7 days using the Visual Analog Scale (VAS). The data were statistically analyzed through the relative and absolute frequency calculations and the differences between the proportions of the events was calculated by Chi-square. Results: In the control group there was no statistically significant difference among the pain scores distribution in all the evaluation periods, whereas in the test group there was a predominance of score 1. There was no statistically significant difference among the intensity of postoperative pain when compared to the groups teste and control. Conclusion: Fibrin rich in platelets did not influence the reduction of painful symptoms after third molar extraction, and further studies on the subject are required

APLICAÇÃO DA FIBRINA RICA EM PLAQUETAS EM CIRURGIA DE TERCEIROS MOLARES: AVALIAÇÃO DO SANGRAMENTO (PARTE I) APPLICATION OF PLATELET-RICH FIBRIN ON THIRD MOLAR SURGERY: EVALUATION OF THE BLEEDING (PART I)

Objetivo: Avaliar os efeitos da aplicação do coágulo leucoplaquetáriona redução do sangramento após exodontias de terceiros molares mandibulares.Materiais e métodos: Foram incluídos na pesquisa pacientessaudáveis, não gestantes, entre 18 e 60 anos com indicação de extraçãobilateral dos terceiros molares inferiores. Os pacientes foram conduzidospara a coleta de sangue, seguida da centrifugação e obtenção do coáguloleucoplaquetário. Na sequência, procedeu-se o sorteio do lado a ser operado.Em seguida, definiu-se o grupo teste onde, após a extração, houvea colocação do coágulo e posterior síntese cirúrgica. O grupo controlecorrespondeu ao lado contralateral e não se utilizou o referido coágulo,apenas a síntese cirúrgica. Resultados: Foram avaliados doze sítios cirúrgicos,em seis pacientes, três do sexo feminino e três do sexo masculino.Após análise estatística com o teste do Qui-quadrado, comparativamente,entre os grupos teste e controle, para os três períodos pós-operatórios,não houve relevância estatística (p=0,65) com relação ao efeito docoágulo leucoplaquetário na diminuição do sangramento. Conclusão: Ocoágulo leucoplaquetário não se mostrou estatisticamente relevante nadiminuição do sangramento pós-operatório de cirurgias de terceiros molaresmandibulares para os períodos avaliados.Purpose: To evaluate the effects of the application of the leucoplaquetaryclot in the reduction of bleeding after mandibular third molar extractions.Methods: The patients included were healthy, non-pregnant patients, between18 and 60 years old with indication of bilateral extraction of thelower third molars. The patients were taken to the blood harvesting, followedby the centrifugation and the obtainment of the leucoplaquetaryclot. Subsequently, the lot was drawn on the side to be operated. Then, thetest group was defined, on which, after the extraction, the clot was placedand surgical synthesis was performed. The control group, correspondedto the opposite site and in the referred site the clot was not placed,therefor it was only sutured. Results: Twelve surgical sites, in six patientswere evaluated, three females and three males, and, after statistical analysiswith the Chi-square test, comparatively, between the test and controlgroups, for the three post-operative periods evaluated, there was no statisticalrelevance (p=0,65) in relation to the effect of the leucoplaquetaryclot in the reduction of bleeding. Conclusions: The leucoplaquetary clotwas not statistically relevant in the reduction of postoperative bleedingfrom third molar mandibular surgeries for the periods evaluated

APLICAÇÃO DA FIBRINA RICA EM PLAQUETAS EM CIRURGIA DE TERCEIROS MOLARES. AVALIAÇÃO DO EDEMA (PARTE III) APPLICATION OF PLATELET-RICH FIBRIN ON THIRD MOLAR SURGERY. SWELLING EVALUATION (PART III)

Introdução: A Fibrina Rica em Plaquetas (PRF) é um derivado sanguíneo estritamente autólogo que tem sido utilizada para minimizar os riscos de complicações em cirurgias bucais. Objetivo: Avaliar os efeitos clínicos da aplicação da PRF em cirurgias de terceiros molares, analisando sua participação na redução do edema. Metodologia: Foram selecionados pacientes saudáveis, não gestantes, com idade variando entre 18 e 60 anos e indicação de cirurgia de terceiros molares bilateralmente impactados, sem história de infecção prévia. Os lados foram divididos por meio de sorteio em grupo controle, sem uso da PRF, e grupo teste, lado com PRF. O acompanhamento pós-operatório foi realizado com 48 horas e 07 dias, através de 06 medições em face, a medida interincisal, comissura labial à asa do nariz, comissura ao canto externo do olho, comissura ao tragus, comissura ao ângulo, ângulo ao mento. Resultados: Foram selecionados 06 pacientes, performando um total de 12 procedimentos cirúrgicos. O maior valor médio dos deltas registrado foi 9,75 mm para a medida interincisal no grupo controle entre as 48 horas e 07 dias pós-operatórios. No mesmo período, foi registrado maior variação dos deltas calculados para o grupo teste nas medidas referentes a comissura labial à asa do nariz e comissura ao canto externo do olho. Não houve dados estatisticamente significantes concernindo os pontos anatômicos em face ao se comparar as medidas pré-operatórias e no pós-operatório de 48 horas e 07 dias. Conclusão: Com base nos resultados, não foi encontrada relevância estatística que suporte o uso da PRF como forma de redução do edema facial na amostra estudada.  Introduction: Platelet Rich Ribrin (PRF) is a strictly autologous blood concentrate that has been used to minimize the risk of complications in third molar surgery. Purpose: To evaluate the clinical effects of the application of PRF in third molar surgery, analyzing its participation in the reduction of edema. Methods: The inclusion criteria consisted of healthy, non-pregnant patients, ranging from 18 to 60 years old and indication of bilaterally impacted third molar surgery, without history of previous infection. The sides were randomly divided in control group, without use of PRF, and test group, side with PRF. Postoperative follow-up was performed in 48 hours and 07 days, through 06 facial measurements Results: We selected 06 patients, with 12 surgeries being performed at the end. The highest mean value of deltas recorded was 9.75 mm for the interincisal measure in the control group between 48 hours and 07 postoperative days. In the same period, a greater variation of the deltas calculated for the test group was recorded in the measurements referring to the labial commissure to the wing of the nose and commissure to the outer corner of the eye. There were no statistically significant data concerning the anatomical points when comparing the preoperative measurements and in the postoperative period of 48 hours and 07 days. Conclusion: Based on the results, no statistical relevance was found that supports the use of PRF as a way to reduce facial swelling in this sample