Metrical analysis of disc-condyle relation with different splint treatment positions in patients with TMJ disc displacement
J. appl. oral sci
;
25(5): 483-489, Sept.-Oct. 2017. tab, graf
Article
in English
| LILACS, BBO
| ID: biblio-893650
ABSTRACT
Abstract Objective:
To evaluate the effect of bite positions characterizing different splint treatments (anterior repositioning and stabilization splints) on the disc-condyle relation in patients with TMJ disc displacement with reduction (DDwR), using magnetic resonance imaging (MRI). Material andMethods:
37 patients, with a mean age of 18.8±4.3 years (7 male and 30 females) and diagnosed with DDwR based on the RDC/TMD, were recruited. MRI metrical analysis of the spatial changes of the disc/condyle, as well as their relationships, was done in three positions maximum intercuspation (Position 1), anterior repositioning splint position (Position 2), and stabilization splint position (Position 3). Disc/condyle coordinate measurements and disc condyle angles were determined and compared.Results:
In Position 1, the average disc-condyle angle was 53.4° in the 60 joints with DDwR, while it was −13.3° with Position 2 and 30.1° with Position 3. The frequency of successful "disc recapture" with Position 2 was significantly higher (58/60, 96.7%) than Position 3 (20/60, 33.3%). In Positions 2 and 3, the condyle moved forward and downward while the disc moved backward. The movements were, however, more remarkable with Position 2.Conclusions:
Anterior repositioning of the mandible improves the spatial relationship between the disc and condyle in patients with DDwR. In addition to anterior and inferior movement of the condyle, transitory posterior movement of the disc also occurred.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Occlusal Splints
/
Temporomandibular Joint Disc
/
Joint Dislocations
/
Mandibular Condyle
Type of study:
Evaluation studies
Limits:
Adolescent
/
Adult
/
Child
/
Female
/
Humans
/
Male
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2017
Type:
Article
Affiliation country:
China
Institution/Affiliation country:
Peking University School & Hospital of Stomatology/CN
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