Related Experiment Video
Updated: May 1, 2026
07:32
Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
2.1K
Dentofacial characteristics in orthodontic patients with centric relation-maximum intercuspation discrepancy.
Won Hee Lim1, Byungtaek Choi, Jeong-Yun Lee
1a Associate Professor, Dental Research Institute and Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea.
The Angle Orthodontist
|March 29, 2014
Summary
Adult orthodontic patients with significant centric relation (CR) to maximum intercuspation (MI) discrepancies often exhibit backward mandibular positioning and rotation. This finding highlights the importance of evaluating CR-MI discrepancy in patients with these dentofacial characteristics.
Area of Science:
- Orthodontics
- Dentofacial Orthopedics
- Cephalometric Analysis
Background:
- Investigating dentofacial characteristics in orthodontic patients with centric relation (CR) and maximum intercuspation (MI) discrepancies.
- Analyzing changes in dentofacial characteristics between CR and MI positions using lateral cephalograms.
Purpose of the Study:
- To identify dentofacial characteristics associated with CR-MI discrepancies in orthodontic patients.
- To analyze cephalometric changes between CR and MI positions in patients with significant CR-MI discrepancies.
Main Methods:
- Adult female patients classified into large (n=20) and small (n=22) CR-MI discrepancy groups.
- Temporomandibular joint (TMJ) MRI performed; gnathological splints used for CR determination in large discrepancy group.
- Lateral cephalograms analyzed for 16 variables to compare CR and MI positions and between groups.
Main Results:
- Large CR-MI discrepancy group showed backward mandibular positioning and rotation at MI compared to norm.
- Mandible exhibited posterior movement and clockwise rotation during MI to CR change in the large discrepancy group.
- All patients with large CR-MI discrepancy had TMJ disk displacement; no significant cephalometric differences at MI between groups.
Conclusions:
- Adult patients with backward mandibular positioning and rotation warrant careful evaluation for potential CR-MI discrepancies.
- TMJ disk displacement is associated with large CR-MI discrepancies.
- Understanding CR-MI discrepancy is crucial for orthodontic treatment planning.
