Relationship between rotational disc displacement of the temporomandibular joint and the dentoskeletal morphology
| Autor: | Won-Jeong Han, So-Hyun Park, Dong-Hwa Chung, Sug-Joon Ahn, Jung-Sub An |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
050402 sociology
medicine.medical_treatment Orthodontics Temporomandibular joint 03 medical and health sciences 0302 clinical medicine 0504 sociology medicine Displacement (orthopedic surgery) Cephalometrics Reduction (orthopedic surgery) medicine.diagnostic_test business.industry Disk displacement 05 social sciences Mandible Magnetic resonance imaging 030206 dentistry Classification medicine.disease Sagittal plane medicine.anatomical_structure Coronal plane Original Article Malocclusion business |
| Zdroj: | Korean Journal of Orthodontics |
| ISSN: | 2005-372X 2234-7518 |
| DOI: | 10.4041/kjod.2021.51.2.105 |
| Popis: | Objective The purpose of this study was to evaluate the relationship between rotational disk displacement (DD) of the temporomandibular joint (TMJ) and the dentoskeletal morphology. Methods Women aged > 17 years were included in this study. Each subject had a primary complaint of malocclusion and underwent routine cephalometric examinations. They were divided into five groups according to the findings on sagittal and coronal magnetic resonance images of their TMJs: bilateral normal disk position, bilateral anterior DD with reduction (ADDR), bilateral rotational DD with reduction (RDDR), bilateral anterior DD without reduction (ADDNR), and bilateral rotational DD without reduction (RDDNR). Twenty-three cephalometric variables were analyzed, and the Kruskal-Wallis test was used to evaluate differences in the dentoskeletal morphology among the five groups. Results Patients with TMJ DD exhibited a hyperdivergent pattern with a retrognathic mandible, unlike those with a normal disk position. These specific skeletal characteristics were more severe in patients exhibiting DD without reduction than in those with reduction, regardless of the presence of rotational DD. Rotational DD significantly influenced horizontal and vertical skeletal patterns only in the stage of DD with reduction, and the mandible exhibited a more backward position and rotation in patients with RDDR than in those with ADDR. However, there were no significant dentoskeletal differences between ADDNR and RDDNR. Conclusions The results of this study suggest that rotational DD of TMJ plays an important role in the dentoskeletal morphology, particularly in patients showing DD with reduction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|