condylar position
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Author(s):  
Ki Eun Hong ◽  
Eun Sup Shin ◽  
Jun Park ◽  
Ji Eon Yun ◽  
Chul Hoon Kim ◽  
...  

Abstract Background The purpose of this retrospective study was to evaluate the postoperative change in the position and stability of the mandibular condyle after bilateral sagittal split ramus osteotomy (BSSRO) and BSSRO with distal segmental ostectomy (DSO) in patients with facial asymmetry using 3D computed tomography. Methods The condyles of the patient diagnosed with facial asymmetry were divided into the deviated side (DS) and the non-deviated side (NDS). Group I, which was treated with BSSRO only, and Group II, which additionally received DSO along with BSSRO, were superimposed on the condyle using the pre-and postoperative 3D CT. The amount of condylar change in anteroposterior displacement, mediolateral displacement, and rotation was measured. The clinical symptoms of temporomandibular joint were also evaluated before and after surgery for each patient. Results Between Groups I and II, there was no statistically significant difference in the anteroposterior condylar position on both DS and NDS. And also, there was no statistical difference between the two groups in the mediolateral change on DS but, statistically significant difference on NDS. The change in the rotation of the condyle was observed to rotate inward from both condylar heads of Groups I and II, and a statistically significant difference was observed between the two groups on both DS and NDS. Moreover, no difference in clinical temporomandibular joint symptoms was observed after surgery in each DS and NDS condyle of the two groups. Conclusions As a result of analyzing the condylar position change of the group treated with BSSRO alone and the group treated with BSSRO and DSO in patients with facial asymmetry, there were statistically significant differences in the mediolateral displacement of NDS and the condyle rotation of NDS and DS. However, the anteroposterior condylar position did not show any difference in the bilateral condyles. In addition, since worsening clinical symptoms of bilateral temporomandibular joint were not observed before and after surgery in both groups, it is concluded that it is not necessary to accompany DSO in patients with facial asymmetry (minimum 3 mm, maximum 7 mm).


2021 ◽  
Vol 10 (3) ◽  
pp. 1-6
Author(s):  
Anderson Vilchez-Chavez ◽  
◽  
Augusto Aguirre-Aguilar ◽  
Marcos J. Carruitero ◽  
◽  
...  

Aim: To determine the association between the level of temporomandibular disorder (TMD) and the condylar position in a university population. Material and Methods: A cross-sectional study was carried out in 41 university students between 18 and 27 years old (21±2.28). The level of TMD was determined using the Helkimo index modified by Maglione, whereas the condylar position was found radiographically by lateral scan. The association was evaluated using the Chi-square statistical test. Results: Statistically significant association was found between the TMD level and the condylar position in the female gender (p=0.003). The central condylar position was the most frequent in females (70.00%), while in males the highest frequency of condylar positions was posterior and anterior, 40.48% and 35.71% respectively. In mild TMD, the most frequent condylar position was central (46.34%), whilst non-centric positions were prevalent in moderate TMD, with 2.44%. There was no statistically significant association between the TMD level and the condylar position of the participants, nor in males (p>0.05). Conclusion: The TMD was associated with the condylar position in females of the university population studied, analyzed in lateral temporomandibular joint scans. Non-centric condylar positions were more frequent in the moderate TMD level and centric positions in mild TMD.


CRANIO® ◽  
2021 ◽  
pp. 1-6
Author(s):  
Nuhad A. Hassan ◽  
Aseel Salan Khazaal Al- Jaboori ◽  
Sanaa J. Mahmoud ◽  
Maisaa Q. Ali

Author(s):  
Mohamed Zahoor Ul Huqh ◽  
Rozita Hassan ◽  
Roselinda Abdul Rahman ◽  
Asilah Yusof ◽  
Ida Bagus Narmada ◽  
...  

Abstract Objectives The purpose of this study was to evaluate the short-term effect of active skeletonized sutural distractor (ASSD) appliance on temporomandibular joint morphology of class III malocclusion subjects. Materials and Methods This was a prospective interventional study. Cone-beam computerized tomography (CBCT) images of 22 patients were taken before and after treatment by using Planmeca Promax 3D CBCT machine version 2.9.2 (Planmeca OY Helsinki, Finland). The condylar width, height, length, roof of glenoid fossa thickness, and all joint spaces were measured. The condylar position was determined based on Pullinger and Hollander formula. The condylar shape was determined as per Kinzinger et al. The condylar volume was calculated by using Mimics software (Materialize, Belgium). Statistical Analysis Data analysis was performed by using SPSS software version 24. Wilcoxon paired signed-rank test was used to compare the difference in temporomandibular joint morphology and condylar volume between pre- and post-treatment measurements. Chi-square test was used to compare the condylar position and shape. Results The superior (p = 0.000 on the right side, p = 0.005 on the left side) and posterior joint spaces (p = 0.000 on both sides) were decreased after the treatment, respectively. The condyles were rotated upward and backward, thereby increasing the anterior joint spaces (p = 0.000 on both sides) after the treatment. The condylar volume increases after treatment, but no significant differences were observed (p = 0.903 on the right side, p = 0.062 on the left side). Conclusion The significant changes were observed in joint spaces. The condyles were more anteriorly placed before treatment. Condylar position and shape alter in response to ASSD treatment. The condylar volume did not show any significant change.


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