Clinical study of augmentation malarplasty with porous polyethylene

Effects of compression on distracted area during mandibular distraction in rabbits

Correction of secondary cleft-lip nasal deformity by using Abbe flap: Report of 4 cases

The study by using the computerized tomography imaging in order to access to mandibular foramen while inferior alveolar nerve anesthesia

PURPOSE: This study was performed to provide an anatomical information of the mandibular ramus for the successful inferior alveolar nerve block. Three dimensional images were reconstructed from the computerized tomography (CT) and the anatomical evaluation of the mandibular ramus was done. MATERIALS AND METHODS: Sixty-four patients who had been taken the facial CT scans from 2000, Jan to 2003, June was selected. The patients who had the anterior or posterior teeth misssing, edentulous ridge, and jaw fracture were excepted. In the occulusal plane, the lingual surface angle (LSA) between the mid-sagittal plane and the mandibular molar lingual surface from the 2nd premolar to the 2nd molar, the inner ramal surface angle (IRSA), the maximum inner ramal surface angle (MxIRSA), and the outer ramal surface angle (ORSA) to the-mid sagittal plane were MEASURED: The inner ramal surface angle in the ligular tip level (IRSA-L) and the outer ramal surface angle in the ligular tip level (ORSA-L), the ramal length (RL), and the anterior ramal length (ARL) were also measured in the lingular tip level. RESULTS: In the lingular tip level, the mean IRSA-L and ORSA-L were 28.6+/-6.3 degrees and 17.9+/-4.9 degrees respectively. The larger was the IRSA, the larger was the ORSA. In the lingular tip level, the mean ramal length was 35.8+/-3.4 mm. The larger was the IRSA-L, the shorter was the ramal length. On the lingular tip level, the mean anterior ramal length from anterior ramus to lingular tip was 19.6+/-3.3 mm. when the ramal length was longer, the anterior ramal length was also longer. On the lingular tip level, there was positive correlation vetween the IRSA and the ORSA, negative correlation between the IRSA and the ramal length, and positive correlation between the ramal length and the lingular tip level to the anterior ramus. There was no statistical meaning of data between sex and age. CONCLUSION: In the clinical view of the results so far achieved, if the direction of needle is closer to posterior it is able to contact bone on lingular tip when the internal surface of ramus is wided outer.

The study of evaluation to relationship between the inferior alveolar nerve and the mandibular third molar by using radiographic image

PURPOSE: This study was performed to evaluate relationship between the inferior alveolar nerve injury and the findings of panoramic and tomographic images for preventing inferior alveolar nerve injury after the 3rd molar extraction. MATERIAL AND METHOD: From April, 2005 to June, 2005, The 190 patients who visited in the Department of Oral and Maxillofacia Surgery, Chonnam National University Hospital and the panoramic radiographies were taken for extraction of the mandibular third molar, was selected. Among 215 mandibular third molars, Scanora tomographic imagings were taken in the 90 teeth which were overlaped to the mandibular canal in the panoramic imagies. In panoramic radiographies, the angulation, the level, the root morphology, and the superimposition sign of the mandibular third molars with the mandibular canal were evaluated. In the tomographic radiographies, the location and distance of the mandibular third molar from the canal were also evaluated. The relationships between these findings and the inferior alveolar nerve injury were examined. RESULTS: In the panoramic findings, the inferior alveolar nerve injuries were occurred in the darkened roots (5 molars, 7%), the uncontinuous radiopaque image (3 molars, 7%), and the depositioned mandibular canal (2 molars, 10%). In the tomographic findings of 90 molars, 20 molars also had the superimposition imagies. Five molars in those molars (25%) had the inferior alveolar nerve injury after extraction. There were 10 patients who had the inferior alveolar nerve injury. The sensory was began to be recovered in 9 patients, except 1 patient, within 2 weeks, then fully recovered within 3 months. CONCLUSION: These results indicate that the depth mandibular third molar and the superimposition sign may be related with the risk of the inferior alveolar nerve injury after extraction.

Effects of pterygomaxillary separation on skeletal and dental changes following surgically-assisted rapid maxillary expansion

The effect of location and angle of drilling on the changes of the distance between two block specimens during screwing on miniplate fixation

A modified endaural and neck approach to the parotid gland tumor

Generally we use the preauricular incision to access and remove the parotid gland tumor. But the preauricular approach has some complications such as damage of facial nerve and sensory nerve, Frey's syndrome, and postoperative scar. Especially, the postoperative scar can often cause an unesthetic result and mental stress in young patients. Therefore, if we avoid preauricular incision to be performed outside of tragus, the postoperative scar would be hardly remarkable, and patients would be satisfied cosmetically. We performed surgical excision using a modified endaural and neck approach in a 21-year-old female with a pleomorphic adenoma and 15-year-old male with a neurofibroma occured in the parotid gland. A new, modified endaural and neck approach is a combined method of the modified endaural incision by Starck et al and Gutierrez's neck extension. We obtained an adequate access and the cosmetically acceptable postsurgical scar. The postoperative scars were hidden in the external ear and the hairline. Moreover, except the neck dissection can this approach be applied to the surgery of temporomandibular joint as well as the parotid gland tumor.