Evaluation of different screw fixation techniques and screw diameters in sagittal split ramus osteotomy: finite element analysis method.

Sagittal split ramus osteotomy (SSRO) is used for correction of numerous congenital or acquired deformities in facial region. Several techniques have been developed and used to maintain fixation and stabilisation following SSRO application. In this study, the effects of the insertion formations of the bicortical different sized screws to the stresses generated by forces were studied. Three-dimensional finite elements analysis (FEA) and static linear analysis methods were used to investigate difference which would occur in terms of forces effecting onto the screws and transmitted to bone between different application areas. No significant difference was found between 1·5- and 2-mm screws used in SSRO fixation. Besides, it was found that 'inverted L' application was more successful compared to the others and that was followed by 'L' and 'linear' formations which showed close rates to each other. Few studies have investigated the effect of thickness and application areas of bicortical screws. This study was performed on both advanced and regressed jaws positions.

Comparison of the effect of naproxen, etodolac and diclofenac on postoperative sequels following third molar surgery: a randomised, double-blind, crossover study.

OBJECTIVE: To compare the three non-steroidal anti-inflammatory agents (NSAIDs) Diclofenac potassium, Etodolac and Naproxen sodium in relation to pain, swelling and trismus following impacted third molar surgery. STUDY DESIGN: The study was a randomized and a double-blinded study which included 42 healthy young individuals with impacted third molars and bone retention. Patients were randomly assigned to 3 groups (n: 14) to which Diclofenac potassium, Naproxen sodium and Etodolac were administered orally an hour before the operation. Impacted third molars were surgically extracted with local anaesthesia. Visual analog scales (VAS) were used to assess the pain in the 6th, 12th hours and on the 1st, 2nd, 3rd, 5th, and 7th days postoperatively. Swelling was evaluated using ultrasound (US) and mouth opening (trismus) was measured with a composing stick pre and post operatively on the 2nd and 7th days respectively. RESULTS: Regarding pain alleviation, Diclofenac potassium was better than Naproxen sodium and Naproxen sodium was better than Etodolac but these differences were not statistically significant. US measurements showed that the swelling on postoperative 2nd day was significantly lowest with Diclofenac potassium as compared to others (p= 0.027) while Naproxen sodium and Etodolac acted similarly (p=0.747). No difference was noted regarding trismus in any of the groups. CONCLUSION: NSAIDs (Diclofenac, Naproxen and Etodolac) are somehow similarly effective for controlling pain and trismus following extraction of mandibular third molars but Diclofenac potassium surpasses others in reduction of swelling.

Hemifacial microsomia and hypodontia: a case report.

A 6-year-old girl with hemifacial microsomia was examined. Abnormalities found were: severely malformed pinna of the right ear, right malar hypoplasia and unilateral mandibular hypoplasia. Dental examination revealed normal intraoral soft tissues with all deciduous teeth present. Radiographic examination disclosed that the maxillary and mandibular right and left second premolars were not developing. The mandibular ramus was short in length and the mandibular condyle had not developed on the right. The patient had no renal, cardiac or skeletal anomalies and her hearing was normal. No previous publications have been located which report the association of hypodontia and hemifacial microsomia.

[Myxofibroma of the mandible]. / Mandibular mikzofibrom.

In this article, a rare case of large myxofibroma of the mandible has been presented. The odontogenic myxoma originated from the mesenchym ise benign and can be arised from dental papilla, dental follicle or the periodontal ligament. Myxoma is mostly located in maxilla or mandible and accompanied by an unerupted tooth and can be seen in the second or third decade of the life. It is painless and uncapsulated and the growth of tumor is slow. Since it is uncapsulated, recurrence is about 25%. Myxoma can be confused radiologically with benign or malign lesions of jaws which are radiolucent in nature. Curretting, cauterization and resection are methods of treatment and the prognosis is good.