Repair process of surgical defects filled with autogenous bone grafts in tibiae of diabetic rats

From a biological standpoint, the best material for reconstruction of bone defects is the autogenous bone graft. However, as tissue healing is affected under diabetic conditions, major changes might take place in the revascularization, incorporation, replacement and remodeling phases of the grafted area. The purpose of this study was to assess the bone healing process in surgical wounds prepared in tibiae of diabetic rats and filled with autogenous bone. Forty male rats (Rattus norvegicus albinus, Wistar) were randomly assigned to receive an endovenous injection (penile vein) of either citrate buffer solution (Group 1 - control; n=20) or streptozotocin dissolved in citrate buffer solution (35 mg/kg) to induce diabetes (Group 2 - diabetic; n=20). After determination of glycemia, the animals were anesthetized and the anterolateral regions of the tibiae of both limbs were shaved, antisepsis was performed and longitudinal incisions were made in each limb. The tibiae were exposed and two 2mm-diameter surgical cavities were prepared: one in the right limb, filled with particulate autogenous bone and the other in the left limb, filled with blood clot. The animals were euthanized at 10 and 30 postoperative days. The anatomic pieces were obtained, submitted to laboratory processing and sections were stained by hematoxylin and eosin and Masson's Trichrome for histomorphologic and histometric analyses. In both groups, the wounds filled with autogenous bone graft showed better results than those filled with blood clot. The control group showed higher new bone formation in wounds filled with autogenous bone graft at 30 days than the diabetic group, but without statistical significance. It may be concluded that, in general, the new bone formation occurred with autogenous graft was quantitatively similar between control and diabetic groups and qualitatively better in the control group

RANCANG BANGUN ANEMOMETER BERBASIS AKUISISI DATA

Data acquisition system is aimed to display value and graphic in real-time. It is designed on Anemometer to present value or graphic of wind speed on Personal Computer (PC) that furthermore, data is analyzed and stored automatically in Microsoft Excel. Equipment used is Wind Speed Air Velocity Anemometer in the form of fan to measure wind speed. It is designed by using Optocoupler as transducer connected to Arduino Uno ATmega328. This Optocoupler has integrated phototransistor and LED (Light Emitting Diode) components. Both components functioned as receiver and data transfer of wind speed from fan by 0 and 1 logic value. Obtained data by PC will be shown on table and graphic including complete time. The result of test shows accuracy specification of Anemometer in 96,149 % and 1,619 % precision with average deviation standard of 0,0475

Influence of surgical ultrasound used in the detachment of flaps, osteotomy and odontosection in lower third molar surgeries. A prospective, randomized, and ?split-mouth? clinical study

As third molar surgery is the most commonly procedure performed in Dentistry and has been accompanied by serious postoperative disorders such as pain, edema and trismus, the study aimed to evaluate if ultrasound device would be able to reduce such postoperative features. The aim of this study was to assess the effects of soft tissue flap elevation, osteotomy and odontosection using piezosurgery versus conventional technique in mandibular third molar extractions. Twenty patients with impacted mandibular third molars underwent tooth extractions using two different methods. Ten patients were included in the Piezo Flap Group (PFG - the flap was elevated using piezosurgery) and ten patients were part of the Piezo Ostectomy Group (POG - osteotomy and odontosection were carried out with ultrasound tips). The contralateral tooth was included in the Control Group (CG - conventional technique). The patients were evaluated at postoperative periods of 1, 3, 7 and 14-days. The measured parameters were duration of surgery, pain, trismus and swelling. The mean duration of surgery for the PFG was 17.21 minutes (CG 10.07 minutes) and POG was 40.09 minutes (CG 15.97 minutes). There was no statistically significant difference in pain and trismus for any of the postoperative periods evaluated in PFG and POG (p>0.05). There was a statistically significant difference in swelling between the PFG and POG, presenting less swelling at the 3-day postoperative period (p=0.038; p0.05). Piezosurgery for tissue elevation of the surgical flap, osteotomy and dental sectioning in mandibular third molar extraction surgery promoted less edema in the early postoperative stages in mandibular third molar extractions despite the longer surgical duration

Projeto de extensão clínica de atualização para extração dos dentes não erupcionados e impactados

In the dental field of oral and maxillofacial surgery the large number of cases of non-erupted teeth and impacted is commonly found in patients treated at Araçatuba Dental School. In order to meet the high demand with a targeted service and enable students interested in the surgical area, the refresher course for extracting teeth unerupted and impacted is performed by selected students, to the accompaniment of teachers and monitors. Students accounted through identification cards and history all cases, so it is possible to identify the profile of patients attended and sort the tooth and the procedure to be performed.Na área odontológica de cirurgia bucomaxilofacial o grande número de casos de dentes não erupcionados e impactados é comumente encontrado nos pacientes atendidos na Faculdade de Odontologia de Araçatuba. Com a intenção de suprir a grande procura com um atendimento direcionado e capacitar os alunos interessados na área cirúrgica, o curso de atualização para extração dos dentes não erupcionados e impactados é realizado por alunos selecionados, com o acompanhamento de professores e monitores. Os alunos contabilizam por meio de fichas de identificação e anamnese todos os atendimentos, assim é possível identificar o perfil do paciente atendido e classificar o dente e o procedimento a ser realizado

Assistência cirúrgico-odontológica a pacientes imunodeprimidos por uso crônico de corticoides

Objective: The objective of this work, and review concepts on the physiology of hormones Adrenals to enhance pre, trans and post-operative care to dentists facing surgical, dental care of immunosuppressed patients. Literature review: The corticosteroids are among the most used drugs in medicine in recent times due to its anti-inflammatory and immunosuppressive activities, especially in transplant patients and patients with chronic autoimmune diseases. However, the continuing use of these drugs leads to a decrease in endogenous production of cortisol by the adrenal. Besides depressing the patient’s immune system, it may generate many parallel undesirable effects like blocking the production of the natural hormone of adrenal cortex, or steroid called cortisol, which may be the cause of a malfunctioning of the adrenal gland, causing hypofunction or hyperfunction of the gland. Final considerations: This fact will lead to changes in the planning of dental surgery, where it will be necessary special actions towards the patients who have this condition.Objetivo: Este trabalho, além de revisar conceitos sobre a fisiologia dos hormônios suprarrenais, tem a finalidade de ressaltar os cuidados pré, trans e pós-operatórios para os cirurgiões-dentistas diante da assistência cirúrgico-odontológica de pacientes imunodeprimidos. Revisão de literatura: Os corticoides ou corticosteroides estão entre os medicamentos mais aplicados na área médica nos últimos tempos em razão de suas atividades anti-inflamatórias e imunossupressoras, especialmente em pacientes transplantados e portadores de doenças autoimunes crônicas. Todavia, o uso contínuo desses medicamentos leva à diminuição da produção endó- gena de cortisol pela suprarrenal. Além de deprimir o sistema imunológico do paciente, pode gerar inúmeros efeitos paralelos indesejáveis, entre os quais o bloqueio na produção do hormônio natural do córtex suprarrenal, denominado cortisol ou corticoide, podendo ser a causa de um funcionamento inadequado da glândula suprarrenal, gerando hipofunção ou hiperfunção da glândula. Considerações finais: Tal fato terá como consequência mudanças no planejamento do tratamento cirúrgico-odontológico, sendo necessária a realização de condutas especiais para os pacientes portadores dessa condição

Utilization of Ethyl Cyanoacrylate and 2-Octyl Cyanoacrylate Adhesives for Autogenous Bone Graft Fixation: Histomorphometric Study in Rats

The present study analyzes the repair process of autogenous bone graft in a block fixed with ethyl cyanoacrylate and 2-octyl cyanoacrylate adhesives in rat calvaria. Forty-eight rats, divided into 3 groups, received round osteotomies at the right parietal bone for the attainment of autogenous bone graft fragment, which was fixed at the opposite side to the donor site with ethyl cyanoacrylate (ethyl group) and 2-octyl cyanoacrylate (octyl group) adhesives. In the control group, bone fragment was only juxtaposed at the parietal bone surface without any fixation material. The animals were euthanized after 10 and 60 postoperative days. The calvariae were processed in a laboratory for the attainment of slides stained through the hematoxylin and eosin technique for histological and histometric analysis. The qualitative analysis showed a discrete inflammatory infiltrate in the control group and moderate inflammatory infiltrate in the ethyl and octyl groups at the 10-day period, which remained at the 60-day period, mainly in the octyl group. The bone fragment remained bonded to the recipient site through the adhesive, but graft incorporation was not observed in any of the specimens. Resorption was higher in the octyl group followed by the ethyl and control groups, both at the 10-and 60-day periods, but with no statistical significance (P < .05). Although promoting graft fixation and its maintenance at the recipient site, both studied adhesives did not allow the graft incorporation, producing a localized and discrete inflammatory reaction, which persisted at 60 days, being more intense in the octyl cyanoacrylate group

CORONECTOMÍA DE TERCEROS MOLARES INFERIORES: REVISIÓN DE LITERATURA

La coronectom&iacute;a tambi&eacute;n llamada odontectom&iacute;a parcial intencional es la remoci&oacute;n de la corona del diente, dejando la ra&iacute;z in situ. Esta t&eacute;cnica es aplicada en terceros molares u otros dientes incluidos en la mand&iacute;bula con el fin de evitar da&ntilde;os al nervio alveolar inferior durante los procedimientos quir&uacute;rgicos. Lesiones al nervio alveolar inferior pueden representar implicaciones m&eacute;dico-legales. El objetivo de este estudio fue realizar una revisi&oacute;n de la literatura sobre la coronectom&iacute;a comparada a los resultados cl&iacute;nicos de las exodoncias en terceros molares inferiores con relaci&oacute;n al nervio alveolar inferior, as&iacute; como las complicaciones relacionadas a la coronectom&iacute;a como: d&eacute;ficit neurosensorial, infecci&oacute;n postoperatoria, migraci&oacute;n radicular. Puede concluirse que la coronectom&iacute;a es una t&eacute;cnica previsible y de f&aacute;cil ejecuci&oacute;n pudiendo ser realizada en ambiente ambulatorial. Es un procedimiento alternativo y &uacute;til en las exodoncias de terceros molares inferiores incluidos que est&aacute;n pr&oacute;ximos al canal mandibular para evitar alteraciones neurosensoriales