A Study on the Size of TMD Patient's Condyle Head

OBJECTIVE: In many TMD cases, deformed and reduced condyle heads were frequently observed. This study was prepared to compare the dimensions between normal and symptomatic condyles, using MR images. MATERIALS: One hundred and twenty one patients with clinical signs and MRI-confirmed diagnosis of disc displacement were selected for this study. Thirty eight TMJs from nineteen asymptomatic volunteers who had no clinical symptoms and no disc displacement on sagittal and coronal view of MRI, were served as normal. METHODS: Symptomatic condyles were classified according to the severity of the anterior disc displacement. The amount of anterior disc displacement was evaluated at sagittal section, and they were classified into 4 groups as normal(N), little(G0), mild(G1), moderate(G2) and severe displacement(G3). The dimentions of condyle were measured at the 200% magnified view, by digitizing program. All dimensions were compared among each groups on the central section of sagittal and coronal views, and the statistical analysis was performed. RESULTS: The mean value of anteroposterior length of normal condyle was 0.79+/-0.13cm at sagittal section and mediolateral length was 2.12+/-0.22cm on coronal section. The mean value of anteroposterior length of symptomatic condyle was 0.67+/-0.16cm at sagittal section and mediolateral length was 1.97+/-0.28cm on coronal section. CONCLUSIONS: The size of symptomatic condyle was smaller than normal TMJ. The size of condyle was decreased as the amount of the disc displacement was increased. The dimensional change was found on the anterior articular surface of condyle at the mild or moderate disc displacement. And at the case of severe disc displacement, dimensional change was found on the superior articular surface.

A Study On The Morphology Of Mandibular Condyle

OBJECTIVE: This study was prepared to figure out a certain dimension and morphology of the condyle at the central, medial and lateral aspects on MR images of asymptomatic volunteers, which could be comparable with those of the TMD patient's condyle. MATERIALS: Sixty TMJs from 30 asymptomatic volunteers(15 male, 15 female) who had no clinical symptoms and no disc displacement on sagital and coronal view of MRI were served as normal. METHOD: MR images were taken from the asymptomatic volunteers and the dimension of the anteroposterior length, mediolateral width, height, convexities were measured through the images on the sagittal and coronal sections of mandibular condyle. Then, these data were collected and analyzed. RESULT: The mean value of anteroposterior length was 8.00+/-1.21mm at central section and mediolateral length was 21.40+/-2.32mm on coronal view. The anterior condylar length at medial side was the shortest and the convexity of anterior slop at the lateral side was roved to be the flattest among 3 sections. There were little dimensional and morphological differences at sagittal sections, but the ediolateral width of condyle at coronal section was significantly different between male and female. CONCLUSION: In sagittal sections, the anterior condyle length was shortest at medial side and the convexity of anterior slop was flattest at lateral side, and there were little dimensional and morphologic differences between male and female. In coronal section, male's condyle was more wider and flatter than female's.

Radiological Evaluation Of Fracture Line Stability During Functional Loading After Miniplate Fixation Of Mandibular Angle Fractures

After miniplate fixation of mandibular angle fractures, fracture line stability during functional loading was evaluated. Using panoramic radiographs, 15 mandibular angle fracture patients who were treated by open reduction and one miniplate fixation along the external oblique ridge, were evaluated at postoperative 1, 4 and 8 weeks. At each time, 2 radiographs were taken: one taken during maximum biting of hardened silicone sheet on the affected side molar area and the other on the non-affected side. The distraction gap of inferior border of mandible at each time and each side was measured and these data were analysed statistically with clinical findings. The differences of inferior border distraction gap during hardened silicone sheet biting on the affected side molar area and on the non-affected side molar area at 4 week radiographs were smaller than those of 1 week's except one case. At 8 week's radiographs, the fracture lines were so stabilized that it was almost impossible to find the gap differences except one case and there were increased radiopacity along the entire fracture lines. Clinically, bony union was confirmed in all cases during plate removal performed at postoperative 6 month. By statistical analysis(paired t-test), the inferior border distraction gap during biting of hardened silicone sheet on the affected side was significantly reduced during 1 and 4 week interval(p<0.01). The differences of inferior border distraction gap during biting on the affected side molar area and on the non-affected side molar area were also significantly reduced at 1 and 4 week interval(p<0.01). But the inferior border distraction(compression) gap during non-affected side biting was not significantly changed. From these findings, it could be concluded that fracture line stability during functional loading after one miniplate fixation of mandibular angle fractures stems mainly from reduction of inferior border distraction gap during affected side biting on time interval. According to these radiographic and clinical findings, the clinical superiority of one miniplate fixation technique in mandibular angle fracture treatment could be confirmed.

Unusual peripheral osteomas: Report of 2 cases

Osteoma is defined as a benign neoplasm of bony tissue. Osteomas are divided into two groups: central and peripheral by origin, compact and cancellous by histopathologic findings. Solitary osteoma of jaw bone, not related with Gardner syndrom, is relatively uncommon. We present two cases of huge solitary peripheral osteomas: compact type exophyting osteoma on the inferolingual side of mandibular angle and cancellous type on the residual ridge of posterior maxilla, which is extremely rare.

The Use Of Bone Reduction Forceps For Reduction And Fixation Of Mandibular Angle Fractures

Until now, many kinds of treatment modalities for mandibular angle fractures have been proposed. about among them, the semi-rigid fixation using miniplates has become a most popular procedure due to its simplicity and good clinical results in nowadays. When we use miniplates according to Champy's ideal osteosynthesis line principles for mandibular angle fracture treatment, we generally perform reduction and fixation procedures under the condition of maxillomandibular fixation(MMF) using arch-bars. But in so doing, due to various reasons, we occasionally observe gapping or torqueing of inferior border of mandibular angle after completion of miniplate fixation. In contrast to MMF state, we can observe intimate reduction of inferior border of mandibular angle due to compressive force and gapping of superior border due to tensile forces during wide mouth opening state. So we developed a new technique which uses bone reduction forceps(or modified towel clips) as a temporary fixation device during wide mouth opening state for intimate reduction and stability along the entire fracture line. By applying this new technique for mandibular angle fracture treatment, it was possible for us to perform easy and accurate miniplate fixation for last 1 year period with clinical success. This article presents some case reports of mandibular angle fracture patients who were treated by this new technique and discussions about the reliability and advantages of this technique.

Cervical necrotizing fasciitis:report of a case

No abstract available.

Cervical necrotizing fasciitis:report of a case

No abstract available.