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Changes in temporomandibular joint disc position and form following Herbst and fixed orthodontic treatment.
Angle Orthod 2010; 80(5):843-52AO

Abstract

OBJECTIVE

To determine the changes in the position and form of the temporomandibular joint articular disc in adolescents with Class II division 1 malocclusion and mandibular retrognathism treated with the Herbst appliance (phase I) and fixed orthodontic appliance (phase II).

MATERIALS AND METHODS

Thirty-two consecutive adolescents went through phase I of treatment and 23 completed phase II. The temporomandibular joints were evaluated qualitatively by means of magnetic resonance images at the beginning of treatment (T1), during phase I (T2), at the end of phase I (T3), and at the end of phase II (T4).

RESULTS

Significant changes in disc position were not observed with the mouth closed between T1 x T3 (P = .317), T3 x T4 (P = .287), or T1 x T4 (P = .261). At T2, on average, the disc was positioned regressively. With the mouth open, no difference was observed between T1 x T3 (P = .223) or T1 x T4 (P = .082). We did observe a significant difference between T3 x T4 (P < .05). Significant changes in the disc form were found with the mouth closed between T1 x T2 (P < .001) and T2 x T3 (P < .001).

CONCLUSIONS

At the end of the two-phase treatment, in general terms, the position and form of the initial articular discs were maintained; however, in some temporomandibular joints some seemingly adverse effects were observed at T4.

Authors+Show Affiliations

Department of Orthodontics, Santa Cecília University, Santos, São Paulo, Brazil. luisaidar@uol.com.brNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20578854

Citation

Aidar, Luís Antônio de Arruda, et al. "Changes in Temporomandibular Joint Disc Position and Form Following Herbst and Fixed Orthodontic Treatment." The Angle Orthodontist, vol. 80, no. 5, 2010, pp. 843-52.
Aidar LA, Dominguez GC, Yamashita HK, et al. Changes in temporomandibular joint disc position and form following Herbst and fixed orthodontic treatment. Angle Orthod. 2010;80(5):843-52.
Aidar, L. A., Dominguez, G. C., Yamashita, H. K., & Abrahão, M. (2010). Changes in temporomandibular joint disc position and form following Herbst and fixed orthodontic treatment. The Angle Orthodontist, 80(5), pp. 843-52. doi:10.2319/093009-545.1.
Aidar LA, et al. Changes in Temporomandibular Joint Disc Position and Form Following Herbst and Fixed Orthodontic Treatment. Angle Orthod. 2010;80(5):843-52. PubMed PMID: 20578854.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Changes in temporomandibular joint disc position and form following Herbst and fixed orthodontic treatment. AU - Aidar,Luís Antônio de Arruda, AU - Dominguez,Gladys Cristina, AU - Yamashita,Hélio K, AU - Abrahão,Márcio, PY - 2010/6/29/entrez PY - 2010/6/29/pubmed PY - 2010/10/1/medline SP - 843 EP - 52 JF - The Angle orthodontist JO - Angle Orthod VL - 80 IS - 5 N2 - OBJECTIVE: To determine the changes in the position and form of the temporomandibular joint articular disc in adolescents with Class II division 1 malocclusion and mandibular retrognathism treated with the Herbst appliance (phase I) and fixed orthodontic appliance (phase II). MATERIALS AND METHODS: Thirty-two consecutive adolescents went through phase I of treatment and 23 completed phase II. The temporomandibular joints were evaluated qualitatively by means of magnetic resonance images at the beginning of treatment (T1), during phase I (T2), at the end of phase I (T3), and at the end of phase II (T4). RESULTS: Significant changes in disc position were not observed with the mouth closed between T1 x T3 (P = .317), T3 x T4 (P = .287), or T1 x T4 (P = .261). At T2, on average, the disc was positioned regressively. With the mouth open, no difference was observed between T1 x T3 (P = .223) or T1 x T4 (P = .082). We did observe a significant difference between T3 x T4 (P < .05). Significant changes in the disc form were found with the mouth closed between T1 x T2 (P < .001) and T2 x T3 (P < .001). CONCLUSIONS: At the end of the two-phase treatment, in general terms, the position and form of the initial articular discs were maintained; however, in some temporomandibular joints some seemingly adverse effects were observed at T4. SN - 1945-7103 UR - https://www.unboundmedicine.com/medline/citation/20578854/Changes_in_temporomandibular_joint_disc_position_and_form_following_Herbst_and_fixed_orthodontic_treatment_ L2 - http://www.angle.org/doi/10.2319/093009-545.1?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -