Estimulación eléctrica en la reparación ósea de defectos creados en cráneos de conejos

Electrical stimulation has been used in different conditions for tissue regeneration. The aim of this study was to analyze the tissue response of defects created in rabbit skulls to electrical stimulation. Two groups were formed, each with 9 New Zealand rabbits; two 5 mm defects were made, one in each parietal, with one being randomly filled with autogenous bone extracted as particles and the other maintained only with blood clotting. The rabbits were euthanized at 8 weeks and 15 weeks to then study the samples collected histologically. In the 8-week analysis bone formation was observed in the defects in the test and control filled with bone graft, whereas the defects with clotting presented a very early stage of bone formation with abundant connective tissue. At 15 weeks an advanced stage of bone regeneration was identified in the defects with bone graft, whereas no significant differences were found in the electrically stimulated defects. In conclusion, electrical stimulus does not alter the sequence of bone formation; new studies could help establish patterns and influences of the stimulus on bone regeneration.Electrical stimulation has been used in different conditions for tissue regeneration. The aim of this study was to analyze the tissue response of defects created in rabbit skulls to electrical stimulation. Two groups were formed, each with 9 New Zealand r33311461150sem informaçãosem informaçãoLa estimulación eléctrica ha sido empleada en diferentes condiciones para la regeneración de tejidos. El objetivo de esta investigación es analizar la respuesta tisular de defectos creados en cráneo de conejos a la estimulación eléctrica. Se formaron 2 g

Eagle's Syndrome Associated With Temporomandibular Disorder: A Clinical Report.

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Accidental Impaction Of A Unilateral Removable Partial Denture: A Clinical Report.

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Mandibular Fractures In A Group Of Brazilian Subjects Under 18 Years Of Age: A Epidemiological Analysis.

This study showed a retrospective analysis of the etiology, incidence and treatment of maxillofacial injuries in a pediatric and adolescent population of the State of Sao Paulo. We analyzed 2986 medical records of victims of facial trauma under 18 years, treated between 1999 and 2008 by the Department of Oral and Maxillofacial Surgery, Piracicaba Dental School, University of Campinas, Sao Paulo - Brazil. During this period, 757 patients under 18 were victims of maxillofacial trauma, of which, 112 patients had 139 lines of fracture in the mandible. The most affected age group were male adolescents. The bicycle accidents constituted the main etiology (34.82%). The conservative treatment was used in 51% of cases, and 49% received surgical treatment. Only 5 cases of postoperative complications were identified. The incidence of trauma and mandible fractures in pediatric and adolescent patients was high in the area of study. Bicycle accidents and falls being the main etiological factors. The group of adolescents was most affected. The conservative and surgical treatment was used almost in the same proportion.741276-8

Inflammatory Fibrous Hyperplasia Treated With A Modified Vestibuloplasty: A Case Report

Aim: The purpose of this report is to present a case of surgical and prosthetic treatment of a woman with inflammatory fibrous hyperplasia (IFH) and her evaluation during a six month period. Background: IFH is a benign pathology, prevalent in female patients, and principally associated with ill-fitting prosthetic devices in need of adjustment. It is common for patients to require surgical removal of the hyperplastic tissue and fabrication of a new prosthesis. Case Report: A 55-year-old female with a history of smoking presented with a chief complaint of missing the scheduled adjustment of her maxillary complete denture and the presence of moveable tissue under the denture. Surgical excision of the hyperplastic tissue followed with fixation of the prosthesis for six months to guide the healing of the soft tissue and to reshape the contours of the maxillary supporting tissues. Summary: Surgical removal of hyperplasic soft tissue is a routine procedure, and the fixation of the prosthesis for the support of tissue during healing improves intraoral conditions for the fabrication of a new prosthesis in the future.93135141Tommasi, A.F., Diagnóstico en Patología bucal (1982) São Paulo: Artes Médicas Ltda, , 1st edBassi APF, Vieira EH, Gabrielli MAC. Hiperplasia Fibrosa Inflamatória. R G O. 199846(4):209-11Hiperplasia, K.S., Inflamatória, F., Paulista Odontol, R., (1999), 21 (2). , 40-4Castro MVM, Duarte CA. Remoção cirúrgica de hiperplasia labial induzida por diastema -relato de caso. B C I. 20018(31):46-8Odontogenic cyst and tumors (2002) Oral and maxillofacial patology, pp. 565-617. , Neville B, Damm D, Allen C, Bouquot J, editors, 2nd ed. Philadelphia: W. B. Saunders;Boldine, R.L., Oral lesions caused by ill-fitting dentures (1969) J Prosthet Dent, 6 (21), pp. 580-588Buchner, A., Calderon, S., Pathologic conditions of the oral mucosa associated with ill-fitting dentures: III Epulis fissiratum and flabby ridge (1979) Isr J Dent Med, 2 (28), pp. 7-13Cooper, E.H., Hyperplasia of the oral tissues caused by ill-fitting dentures (1964) Br Dent J, 2 (116), pp. 111-114Kazanjian, V.H., Surgery as an aid to more efficient service with prosthetic dentures (1935) J Am Dent Assoc, 22, p. 566Coelho, C.M.P., Sousa, Y.T.C.S., Daré, A.M.Z., Denture-related oral mucosal lesions in a Brazilian school of dentistry (2004) J Oral Rehabil, 31, pp. 135-139Fröschl, T., Kerscher, A., The optimal vestibuloplasty in preprosthetic surgery of the mandible (1997) J Canio Maxillofac Surg, 25, pp. 85-90Al-Mahdy, F., Mandibular anterior ridge extension: A modification of the kazanjian vestibuloplasty technique (1997) J Oral Maxillofac Surg, 55, pp. 1057-105

In vitro comparison of dental implant site preparation with ultrasonic system and conventional rotatory system

To compare in vitro the site preparation of dental implant using a rotatory system and an ultrasonic system by evaluating the variability of temperature, time and primary stability that is provided by the different sequences of dental implant drills and tips. Materials and methods: Sixteen osteotomies were performed with different sequences of drills (Initial, Titamax 2.0, 2/3 and 3.0) for the rotatory group (RG) and tips (IM1S, IM2P, IM2/3, IM3P) for the ultrasonic group (UG) on bovine cortical-cancellous bone samples. Micro-CT images were acquired to assess bone microarchitecture and bone mineral density of each sample to guarantee similar bone conditions. For the RG, the osteotomies were performed with a dental implant contra-angle handpiece at 800 rpm and 50 N/cm maximum torque using an implant micromotor. For the UG, the osteotomies were performed using a Piezosurgery3 system with the respective tip. The temperature was measured and four implants 3.75 × 11 Titamax were installed in each group to measure the final torque. Results: For the RG, the following mean values were found: 22.87 s, 24.2°C superficial temperature, 27.6°C perforation temperature and 32.30 N/cm torque. The UG values were 72.9 s, 26.6°C superficial temperature, 32.1°C perforation temperature and 22.60 N/cm torque. Conclusions: Rotatory and ultrasonic systems are effective methods for implant site preparation with satisfactory outcomes. For cortical-cancellous preparation sites, the drills of the RG were related to lower temperatures and less time for osteotomy. Thus, the use of rotatory systems is preferred due to the heat differential generated during the dental implant sites preparation13210811