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A prospective study of Twin-block appliance therapy assessed by magnetic resonance imaging.
Am J Orthod Dentofacial Orthop 2000; 118(5):494-504AJ

Abstract

Forty children displaying Class II Division 1 malocclusion were involved in a prospective magnetic resonance image investigation to evaluate the effects of Twin-block functional appliances on the temporomandibular joints. None of these children had clinical signs or symptoms of temporomandibular disorders. Nineteen children were treated with a Clark Twin-block appliance for 6 months; the other 21 children received no treatment and served as controls. Comparison between control and Clark Twin-block groups suggested that reduction of the condylar axial angle represents a feature of untreated Class II growth patterns, whereas axial angle stability with Clark Twin-block therapy may suggest alteration of condylar growth direction. Condyles that were positioned at the crest of the articular eminence by the Clark Twin-block at the beginning of treatment had reseated back into the glenoid fossa after 6 months. However, 75% of the condyles were more anteriorly positioned in successfully treated Clark Twin-block cases. There was no clear evidence of remodeling of the glenoid fossa at the eminence as a result of Clark Twin-block treatment. The initial prevalence of disk displacements for the combined groups was 7.5% anterior, 5% medial, and 12.5% for lateral disk displacement. Clark Twin-block therapy had neither positive nor negative effects on disk position, and there was no convincing evidence that the disk was recaptured.

Authors+Show Affiliations

Dental School, The University of Adelaide, South Australia.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11094363

Citation

Chintakanon, K, et al. "A Prospective Study of Twin-block Appliance Therapy Assessed By Magnetic Resonance Imaging." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 118, no. 5, 2000, pp. 494-504.
Chintakanon K, Sampson W, Wilkinson T, et al. A prospective study of Twin-block appliance therapy assessed by magnetic resonance imaging. Am J Orthod Dentofacial Orthop. 2000;118(5):494-504.
Chintakanon, K., Sampson, W., Wilkinson, T., & Townsend, G. (2000). A prospective study of Twin-block appliance therapy assessed by magnetic resonance imaging. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 118(5), pp. 494-504.
Chintakanon K, et al. A Prospective Study of Twin-block Appliance Therapy Assessed By Magnetic Resonance Imaging. Am J Orthod Dentofacial Orthop. 2000;118(5):494-504. PubMed PMID: 11094363.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A prospective study of Twin-block appliance therapy assessed by magnetic resonance imaging. AU - Chintakanon,K, AU - Sampson,W, AU - Wilkinson,T, AU - Townsend,G, PY - 2000/11/30/pubmed PY - 2001/2/28/medline PY - 2000/11/30/entrez SP - 494 EP - 504 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 118 IS - 5 N2 - Forty children displaying Class II Division 1 malocclusion were involved in a prospective magnetic resonance image investigation to evaluate the effects of Twin-block functional appliances on the temporomandibular joints. None of these children had clinical signs or symptoms of temporomandibular disorders. Nineteen children were treated with a Clark Twin-block appliance for 6 months; the other 21 children received no treatment and served as controls. Comparison between control and Clark Twin-block groups suggested that reduction of the condylar axial angle represents a feature of untreated Class II growth patterns, whereas axial angle stability with Clark Twin-block therapy may suggest alteration of condylar growth direction. Condyles that were positioned at the crest of the articular eminence by the Clark Twin-block at the beginning of treatment had reseated back into the glenoid fossa after 6 months. However, 75% of the condyles were more anteriorly positioned in successfully treated Clark Twin-block cases. There was no clear evidence of remodeling of the glenoid fossa at the eminence as a result of Clark Twin-block treatment. The initial prevalence of disk displacements for the combined groups was 7.5% anterior, 5% medial, and 12.5% for lateral disk displacement. Clark Twin-block therapy had neither positive nor negative effects on disk position, and there was no convincing evidence that the disk was recaptured. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/11094363/A_prospective_study_of_Twin_block_appliance_therapy_assessed_by_magnetic_resonance_imaging_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(00)04259-1 DB - PRIME DP - Unbound Medicine ER -