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Treatment and posttreatment outcomes induced by the Mandibular Advancement Repositioning Appliance; a controlled clinical study.
Angle Orthod. 2011 Jul; 81(4):684-91.AO

Abstract

OBJECTIVE

To evaluate the treatment and posttreatment dentoskeletal effects induced by the Mandibular Advancement Repositioning Appliance (MARA) in the treatment of Class II malocclusion.

MATERIALS AND METHODS

The treated sample consisted of 23 consecutively treated patients at prepubertal or pubertal stages, as assessed by the cervical vertebral maturation method. A control group of untreated Class II subjects was generated from published normative growth data. Lateral cephalograms were digitized and superimposed via cephalometric software at three different times: T1, pretreatment; T2, post-MARA treatment; and T3, at least 1 year after T2. The T1-T2, T2-T3, and T1-T3 changes in the treated group were compared to those in the control group with independent-sample Student's t-tests.

RESULTS

Skeletal and dentoalveolar effects of MARA were assessed after the active phase of the treatment (T1-T2). Mandibular elongation in length (Co-Gn, +2.2 mm) was evident together with lower incisor proclination (IMPA, +5.8 mm). A relapse tendency for IMPA was noticed after removing the appliance (IMPA, -2.1° during T2-T3). Significant skeletal effects (Co-Gn, +2.0 mm) and headgear effects on the maxilla (SNA, -1.2°) were significant in the long term (T1-T3).

CONCLUSIONS

The MARA appliance provides an effective correction of Class II malocclusion, which is maintained at a posttreatment observation with a moderate skeletal effect.

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Authors+Show Affiliations

Ghislanzoni LT
Department of Orthodontics, University of Florence, Florence, Italy.
Toll DE
No affiliation info available
Defraia E
No affiliation info available
Baccetti T
No affiliation info available
Franchi L
No affiliation info available

MeSH

CephalometryChildFemaleHumansMaleMalocclusion, Angle Class IIMandibular AdvancementMyofunctional TherapyOrthodontic Appliances, FunctionalProspective StudiesStatistics as TopicTreatment Outcome

Pub Type(s)

Controlled Clinical Trial
Journal Article

Language

eng

PubMed ID

21299408

Citation

Ghislanzoni, Luis Tomas Huanca, et al. "Treatment and Posttreatment Outcomes Induced By the Mandibular Advancement Repositioning Appliance; a Controlled Clinical Study." The Angle Orthodontist, vol. 81, no. 4, 2011, pp. 684-91.
Ghislanzoni LT, Toll DE, Defraia E, et al. Treatment and posttreatment outcomes induced by the Mandibular Advancement Repositioning Appliance; a controlled clinical study. Angle Orthod. 2011;81(4):684-91.
Ghislanzoni, L. T., Toll, D. E., Defraia, E., Baccetti, T., & Franchi, L. (2011). Treatment and posttreatment outcomes induced by the Mandibular Advancement Repositioning Appliance; a controlled clinical study. The Angle Orthodontist, 81(4), 684-91. https://doi.org/10.2319/111010-656.1
Ghislanzoni LT, et al. Treatment and Posttreatment Outcomes Induced By the Mandibular Advancement Repositioning Appliance; a Controlled Clinical Study. Angle Orthod. 2011;81(4):684-91. PubMed PMID: 21299408.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Treatment and posttreatment outcomes induced by the Mandibular Advancement Repositioning Appliance; a controlled clinical study. AU - Ghislanzoni,Luis Tomas Huanca, AU - Toll,Douglas Edward, AU - Defraia,Efisio, AU - Baccetti,Tiziano, AU - Franchi,Lorenzo, Y1 - 2011/02/07/ PY - 2011/2/9/entrez PY - 2011/2/9/pubmed PY - 2011/11/8/medline SP - 684 EP - 91 JF - The Angle orthodontist JO - Angle Orthod VL - 81 IS - 4 N2 - OBJECTIVE: To evaluate the treatment and posttreatment dentoskeletal effects induced by the Mandibular Advancement Repositioning Appliance (MARA) in the treatment of Class II malocclusion. MATERIALS AND METHODS: The treated sample consisted of 23 consecutively treated patients at prepubertal or pubertal stages, as assessed by the cervical vertebral maturation method. A control group of untreated Class II subjects was generated from published normative growth data. Lateral cephalograms were digitized and superimposed via cephalometric software at three different times: T1, pretreatment; T2, post-MARA treatment; and T3, at least 1 year after T2. The T1-T2, T2-T3, and T1-T3 changes in the treated group were compared to those in the control group with independent-sample Student's t-tests. RESULTS: Skeletal and dentoalveolar effects of MARA were assessed after the active phase of the treatment (T1-T2). Mandibular elongation in length (Co-Gn, +2.2 mm) was evident together with lower incisor proclination (IMPA, +5.8 mm). A relapse tendency for IMPA was noticed after removing the appliance (IMPA, -2.1° during T2-T3). Significant skeletal effects (Co-Gn, +2.0 mm) and headgear effects on the maxilla (SNA, -1.2°) were significant in the long term (T1-T3). CONCLUSIONS: The MARA appliance provides an effective correction of Class II malocclusion, which is maintained at a posttreatment observation with a moderate skeletal effect. SN - 1945-7103 UR - https://www.unboundmedicine.com/medline/citation/21299408/Treatment_and_posttreatment_outcomes_induced_by_the_Mandibular_Advancement_Repositioning_Appliance L2 - https://meridian.allenpress.com/angle-orthodontist/article-lookup/doi/10.2319/111010-656.1 DB - PRIME DP - Unbound Medicine ER -