Postoperative changes in mandibular prognathism surgically treated by intraoral vertical ramus osteotomy

2013 ◽  
Vol 42 (1) ◽  
pp. 62-70 ◽  
Author(s):  
J. Nihara ◽  
M. Takeyama ◽  
Y. Takayama ◽  
Y. Mutoh ◽  
I. Saito
Keyword(s):  
Mandibular Prognathism ◽  
Postoperative Changes ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Vertical Ramus Osteotomy

scholarly journals Correlation between the Pharyngeal Airway Space and Head Posture after Surgery for Mandibular Prognathism

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Chun-Ming Chen ◽  
Steven Lai ◽  
Ker-Kong Chen ◽  
Huey-Er Lee
Keyword(s):  
Mandibular Prognathism ◽  
Head Posture ◽  
Oropharyngeal Airway ◽  
Pharyngeal Airway ◽  
Mandibular Setback ◽  
Postoperative Changes ◽  
Lateral Cephalograms ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Mandibular Setback Surgery ◽  
Vertical Ramus Osteotomy

Purpose. The aim of this study was to determine the correlation between the pharyngeal airway space and head posture after mandibular setback surgery for mandibular prognathism.Materials and Methods. Serial lateral cephalograms of 37 patients with mandibular prognathism who underwent intraoral vertical ramus osteotomy (IVRO) were evaluated before (T1) and immediately (T2), between 6 weeks and 3 months (T3), and more than 1 year (T4) after surgery. Pairedt-tests and Pearson’s correlation analysis were used to evaluate the postoperative changes in all cephalometric parameters, including the mandible, hyoid, head posture (craniocervical angle), and pharyngeal airway space.Results. The mandible and hyoid were set back by 12.8 mm and 4.9 mm, respectively, at T2. Furthermore, the hyoid showed significant inferior movement of 10.7 mm, with an 8 mm increase in the tongue depth. The upper oropharyngeal airway (UOP) shortened by 4.1 mm, the lower oropharyngeal airway (LOP) by 1.7 mm, and the laryngopharyngeal airway by 2 mm. The craniocervical angle showed a significant increase of 2.8°. UOP and LOP showed a significant correlation with the craniocervical angle at T2 and T4.Conclusions. Our findings conclude that the oropharyngeal airway space is significantly decreased and correlated with a change in the head posture after mandibular setback surgery.

Intraoral vertical ramus osteotomy for correction of mandibular prognathism

2013 ◽  
Vol 42 (10) ◽  
pp. 1341
Author(s):  
Y. Yoshinori ◽  
N. Kazuyuki ◽  
O. Takeshi ◽  
K. Kenichiro ◽  
K. Tuyoshi
Keyword(s):  
Mandibular Prognathism ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Vertical Ramus Osteotomy

Intraoral Vertical Ramus Osteotomy for Correction of Mandibular Prognathism

2008 ◽  
Vol 61 (1) ◽  
pp. 52-55 ◽  
Author(s):  
Chun-Ming Chen ◽  
Huey-Er Lee ◽  
Chia-Fu Yang ◽  
Yee-Shyong Shen ◽  
I-Yueh Huang ◽  
...  
Keyword(s):  
Mandibular Prognathism ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Vertical Ramus Osteotomy

Skeletal changes after modified intraoral vertical ramus osteotomy for correction of mandibular prognathism

2007 ◽  
Vol 60 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Steven Sheng-Tsung Lai ◽  
Yu-Chuan Tseng ◽  
I-Yueh Huang ◽  
Yi-Hsin Yang ◽  
Yee-Shyong Shen ◽  
...  
Keyword(s):  
Mandibular Prognathism ◽  
Skeletal Changes ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Vertical Ramus Osteotomy

scholarly journals Intraoperative Hemorrhage and Postoperative Sequelae after Intraoral Vertical Ramus Osteotomy to Treat Mandibular Prognathism

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Chun-Ming Chen ◽  
Steven Lai ◽  
Ker-Kong Chen ◽  
Huey-Er Lee
Keyword(s):  
Blood Loss ◽  
Operating Time ◽  
Rank Correlation ◽  
Men And Women ◽  
Mandibular Prognathism ◽  
Mandibular Setback ◽  
Intraoral Vertical Ramus Osteotomy ◽  
The Mean ◽  
Blood Loss Volume ◽  
Vertical Ramus Osteotomy

Objective.To investigate the factors affecting intraoperative hemorrhage and postoperative sequelae after orthognathic surgery.Materials and Methods.Eighty patients with mandibular prognathism underwent surgical mandibular setback with intraoral vertical ramus osteotomy (IVRO). The correlation between the blood loss volume and postoperative VAS with the gender, age, and operating time was assessed using thet-test and Spearman rank correlation coefficient. The correlation between the magnitude of mandibular setback with the presence of TMJ clicking symptoms and lip sensation was also assessed.Results.The mean operating time and blood loss volume for men and women were 249.52 min and 229.39 min, and 104.03 mL and 86.12 mL, respectively. The mean VAS in men and women was 3.21 and 2.93, and 1.79 and 1.32 on the first and second postoperative days. There is no gender difference in the operating time, blood loss, VAS, TMJ symptoms, and lip numbness. The magnitude of mandibular setback was not correlated with immediate and long-term postoperative lip numbness.Conclusion.There are no gender differences in the intraoperative hemorrhage and postoperative sequelae (pain, lip numbness, and TMJ symptoms). In addition, neither symptom was significantly correlated with the amount of mandibular setback.

scholarly journals Three-dimensional Analysis of Mandible Ramus Morphology and Transverse Stability After Intraoral Vertical Ramus Osteotomy

2021 ◽  
Author(s):  
Luo Huang ◽  
Shan Tang ◽  
Jing Yan ◽  
Yaoran Liu ◽  
ZhengGuo Piao
Keyword(s):  
Three Dimensional ◽  
Reference Points ◽  
Class Iii ◽  
Mandibular Ramus ◽  
Skeletal Class ◽  
Computed Tomography Images ◽  
Postoperative Changes ◽  
Transverse Stability ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Vertical Ramus Osteotomy

Abstract Objectives: The purpose of this study was to investigate short- and long-term postoperative changes of both morphology and transverse stability in mandibular ramus after intraoral vertical ramus osteotomy (IVRO) in patients with jaw deformity using three-dimensional (3D) orthognathic surgery planning treatment software for measurement of distances and angles.Study Design: This retrospective study included consecutive patients with skeletal Class III malocclusion who had undergone intraoral vertical ramus osteotomy and computed tomography images before (T0), immediately after (T1), and one year after (T2) surgery. Reference points, reference lines and evaluation items were designated on the reconstructed 3D surface models to measure distances, angles and volume. The average values at T0, T1, T2 and time-dependent changes in variables were obtained.Results: After surgery, the condylar length, ramal height, mandibular body length and mandibular ramus volume were significantly decreased (P < .01), while clinically insignificant change was observed from T1 to T2. The angular length was increased immediately after surgery (P < .05), but it was decreased 1 year after surgery (P < .05). Lateral ramal inclination showed significant increase after surgery (P < .05) and maintained at T2.Conclusion: Changes in the morphology of the mandibular ramus caused by IVRO do not obviously bring negative effect on facial appearance. Furthermore, despite position and angle of mandibular ramus changed after IVRO, good transverse stability was observed postoperatively. Therefore, IVRO technique can be safely used without compromising esthetic results.

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