The correlation analysis between incisal guidance angle and occlusal plane angles and temporomandibular joint morphology.
Clin Oral Investig
; 28(8): 455, 2024 Jul 30.
Article
in En
| MEDLINE
| ID: mdl-39078486
ABSTRACT
OBJECTIVES:
The correlations between the incisal guidance angle (IGA) and occlusal plane angles and temporomandibular joint (TMJ) morphology were investigated in adults with skeletal Class II division II malocclusion. MATERIALS ANDMETHODS:
CBCT images of 37 patients were analyzed. It included 19 cases of skeletal Class II division II malocclusion with low angle (study group) and 18 cases of skeletal Class I average angle (control group). The Invivo Dental 5 software was employed to acquire the data of the incisal guidance angle (IGA), occlusal plane angle (FH-OP), anterior occlusal plane angle (FH-AOP) and the TMJ measurement items.RESULTS:
The results of IGA, FH-AOP angle and FH-OP angle showed the study group > the control group (P < 0.05). There were statistically difference in the condylar mediolateral diameters, articular eminence inclination and height, and posterior joint spaces between two groups. No differences were revealed in the condylar anteroposterior diameters, the condylar inclination angle, condylar head width and height, condylar length, glenoid fossa depth and width between two groups. In the study group, IGA showed a moderate correlation with FH-AOP, a weak correlation with FH-OP and condylar mediolateral diameters. Meanwhile, there was a correlation between FH-AOP, FH-OP, and TMJ indicators.CONCLUSIONS:
The IGA was not only related to FH-AOP and FH-OP, but also to the condylar mediolateral diameters. In addition, there was a correlation between the occlusal plane angles and TMJ morphology in skeletal Class II division II low angle malocclusion. CLINICAL RELEVANCE For patients with skeletal Class II division II low angle malocclusion, adjusting the IGA and the occlusal plane angles could improve the esthetic appearance of the anterior teeth, occlusal function, and TMJ morphology.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Temporomandibular Joint
/
Cone-Beam Computed Tomography
/
Malocclusion, Angle Class II
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Clin Oral Investig
Journal subject:
ODONTOLOGIA
Year:
2024
Document type:
Article
Affiliation country: