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Relapse in Angle Class II Division 1 Malocclusion treated by tandem mechanics without extraction of permanent teeth: A retrospective analysis.
Am J Orthod Dentofacial Orthop. 2000 Jul; 118(1):34-42.AJ

Abstract

Ideal orthodontic treatment should achieve long-term stability of the occlusion. The mandibular incisor segment has been described as the segment that is most likely to exhibit relapse after treatment and retention. Therefore, relapse of this is a challenge that clinicians need to address. The purpose of this study is to evaluate the amount of relapse that may occur in Angle Class II Division 1 patients, treated orthodontically with tandem mechanics. All cases in this study were treated without extraction of permanent teeth, and the patients were followed for at least 2 years after the end of the retention phase of treatment. Six predictors were investigated at pretreatment, posttreatment, and postretention periods. A synopsis of this study shows the correction of lower incisor crowding as measured by the irregularity index was stable over 5.2 years of postretention follow-up; but longer follow-up time revealed increased relapse of incisor irregularity. Intermolar width increased during treatment and remained stable in the follow-up period. Overjet and overbite corrections and changes in the lower incisor to mandibular plane angle were also stable in the follow-up period. In addition, the amounts of overjet correction and loss of expansion of intercanine distance after treatment were associated with increased irregularity index in the follow-up period. It appears the discrepancies between this and previously published works are sufficiently dramatic that the whole question of treatment philosophy and long-term stability may need to be reevaluated.

Authors+Show Affiliations

Medical College of Georgia, Augusta, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

10893471

Citation

Yavari, J, et al. "Relapse in Angle Class II Division 1 Malocclusion Treated By Tandem Mechanics Without Extraction of Permanent Teeth: a Retrospective Analysis." 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. 1, 2000, pp. 34-42.
Yavari J, Shrout MK, Russell CM, et al. Relapse in Angle Class II Division 1 Malocclusion treated by tandem mechanics without extraction of permanent teeth: A retrospective analysis. Am J Orthod Dentofacial Orthop. 2000;118(1):34-42.
Yavari, J., Shrout, M. K., Russell, C. M., Haas, A. J., & Hamilton, E. H. (2000). Relapse in Angle Class II Division 1 Malocclusion treated by tandem mechanics without extraction of permanent teeth: A retrospective analysis. 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(1), 34-42.
Yavari J, et al. Relapse in Angle Class II Division 1 Malocclusion Treated By Tandem Mechanics Without Extraction of Permanent Teeth: a Retrospective Analysis. Am J Orthod Dentofacial Orthop. 2000;118(1):34-42. PubMed PMID: 10893471.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Relapse in Angle Class II Division 1 Malocclusion treated by tandem mechanics without extraction of permanent teeth: A retrospective analysis. AU - Yavari,J, AU - Shrout,M K, AU - Russell,C M, AU - Haas,A J, AU - Hamilton,E H, PY - 2000/7/14/pubmed PY - 2000/10/21/medline PY - 2000/7/14/entrez SP - 34 EP - 42 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 - 1 N2 - Ideal orthodontic treatment should achieve long-term stability of the occlusion. The mandibular incisor segment has been described as the segment that is most likely to exhibit relapse after treatment and retention. Therefore, relapse of this is a challenge that clinicians need to address. The purpose of this study is to evaluate the amount of relapse that may occur in Angle Class II Division 1 patients, treated orthodontically with tandem mechanics. All cases in this study were treated without extraction of permanent teeth, and the patients were followed for at least 2 years after the end of the retention phase of treatment. Six predictors were investigated at pretreatment, posttreatment, and postretention periods. A synopsis of this study shows the correction of lower incisor crowding as measured by the irregularity index was stable over 5.2 years of postretention follow-up; but longer follow-up time revealed increased relapse of incisor irregularity. Intermolar width increased during treatment and remained stable in the follow-up period. Overjet and overbite corrections and changes in the lower incisor to mandibular plane angle were also stable in the follow-up period. In addition, the amounts of overjet correction and loss of expansion of intercanine distance after treatment were associated with increased irregularity index in the follow-up period. It appears the discrepancies between this and previously published works are sufficiently dramatic that the whole question of treatment philosophy and long-term stability may need to be reevaluated. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/10893471/Relapse_in_Angle_Class_II_Division_1_Malocclusion_treated_by_tandem_mechanics_without_extraction_of_permanent_teeth:_A_retrospective_analysis_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(00)37031-7 DB - PRIME DP - Unbound Medicine ER -