Evaluation of inorganic bovine bone graft in periodontal defects after third molar surgery.

AIM: This study evaluated the e cacy of inorganic bovine bone graft (IBB) in periodontal defect after mandibular third molar (3M) surgery. METHODS: The authors conducted a split-mouth, prospective, randomized, blinded, placebo-controlled clinical trial involving 20 participants with a mean age of 21.60 ± 6.5 years who had symmetrical bilateral lower 3M randomly assigned to receive IBB or left empty (blooding clot). The clinical variables studied were probing depth and clinical attachment level (CAL) at preoperative and postoperative periods of 10, 30, and 60 days. Radiographic measures included the distance from the alveolar bone crest to the cementoenamel junction and the bone density at 30 and 60 days postsurgical procedure. For statistical analysis, we used the paired t-test at a level of signi cance of 5%. RESULTS: It was observed a reduction in pocket depth and CAL in both groups, but IBB did not provide better results than blooding clot (P > 0.05). On the other hand, IBB group showed an increased in the bone density, and a decrease in the periodontal defect on the distal surface of second molar (2M) after 30 and 60 days of surgery compared to the control group (P < 0.05). CONCLUSION: The use of inorganic bone graft (GenOx) did not enhance the probing depth after 3M removal. Although the radiographic ndings have showed an increase in bone density and a decrease in the periodontal defect on the distal surface of the 2M, we cannot recommend the use of IBB as a treatment for periodontal defect prevention after 3M removal.

Evaluation of reliability and reproducibility of linear measurements of cone-beam-computed tomography.

OBJECTIVE: it was to evaluate intra- and interexaminer reliability and reproducibility of linear measurements in cone-beam tomography (CBCT) images. MATERIALS AND METHODS: CBCT scans were obtained from 50 patients of a private clinic. Two examiners located the landmarks twice in two-dimensional and three-dimensional images on different days, with images performed 1 week apart. Intra- and interexaminer reproducibility and reliability were analyzed. RESULTS: the measurement error (ME) did not show significant differences between intra- and interexaminers. The intraclass correlations (ICC) between the intra- and interexaminer readings obtained with the different methods showed almost perfect matches. The results demonstrated high examiner reproducibility for linear and volumetric parameters with high intraclass correlation coefficient (ICC) and coefficient of variation (CV). The ICC showed that the methodology was highly reliable and reproducible (ICC- >0.99 and CV <1.5%). CONCLUSION: the measurements demonstrated strong agreement between examiners and significant reliability and reproducibility. Therefore, this methodology can serve as a standard for linear measurement analysis of the topography of mandibular canal and osseous adjacent structures.

Osteorradionecrose resultando em fratura patológica de mandíbula: relato de caso clínico / Osteoradionecrosis resulting in pathological fracture of jaw: relate of clinical case

Introdução: A osteorradionecrose (ORN) é uma severa complicação da radioterapia em pacientes portadores de câncer de cabeça e pescoço. Dependendo da localização e extensão da lesão osteorradionecrótica, pode trazer sinais e sintomas como dor, odor fétido, disgeusia, disestesia ou anestesia, trismo, dificuldade de mastigação, deglutição e fonação, formação de fístula, fratura patológica e infecção local ou sistêmica. Objetivo: O presente trabalho teve como objetivo relatar um caso clínico de um paciente portador de osteorradionecrose em corpo mandibular, com presença de infecção, e que resultou em fratura patológica mandibular. Desenvolvimento do caso: Foram realizados esquemas rigorosos de antibioticoterapia,associados a oxigenoterapia hiperbßrica para permitir o tratamento da fratura mandibular com fixação interna rígida, após o tratamento da infecção secundßria, na intenção de eliminar aosteorradionecrose, a qual no caso em questão houve reparação e ausência de qualquer sinal clínico radiogrßfico de recidiva, num acompanhamento de um ano de pós-operatório. Conclusão:Diante da severidade da doença, esgotadas as possibilidades conservadoras e diante de uma necessidade cirúrgica pela fratura patológica, pôde-se observar que o uso da oxigenoterapia hiperbßrica resultou em uma satisfatória cicatrização da ferida cirúrgica, bem como a manutenção da saúde dos tecidos no caso em questão.