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Postretention relapse of mandibular anterior crowding in patients treated without mandibular premolar extraction.
Am J Orthod Dentofacial Orthop. 2004 Apr; 125(4):480-7.AJ

Abstract

Treatment stability is one of the most important objectives in orthodontics, but, despite decades of research, it is still agreed that the stability of aligned teeth is variable and largely unpredictable. This study aimed to evaluate the relapse of mandibular anterior crowding in patients treated without mandibular premolar extraction. The sample comprised 40 patients of both sexes with Class I or II malocclusions who received nonextraction treatment in the mandibular arch with edgewise mechanics. Lateral cephalograms and dental casts of each patient were obtained at pretreament, posttreatment, and 5 years postretention. Relapse of mandibular anterior crowding was assessed, and associations between this relapse and other clinical factors were also investigated. Mandibular anterior crowding was measured by the Little irregularity index, and the data were evaluated by the Mann-Whitney test. The mean relapse of mandibular anterior crowding was 1.95 mm (26.54%) over the long term. No clinical factor studied was predictive of crowding relapse in the long term.

Authors+Show Affiliations

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo 17012-901, Brazil. bst00111@uol.com.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15067265

Citation

Freitas, Karina M S., et al. "Postretention Relapse of Mandibular Anterior Crowding in Patients Treated Without Mandibular Premolar Extraction." 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. 125, no. 4, 2004, pp. 480-7.
Freitas KM, de Freitas MR, Henriques JF, et al. Postretention relapse of mandibular anterior crowding in patients treated without mandibular premolar extraction. Am J Orthod Dentofacial Orthop. 2004;125(4):480-7.
Freitas, K. M., de Freitas, M. R., Henriques, J. F., Pinzan, A., & Janson, G. (2004). Postretention relapse of mandibular anterior crowding in patients treated without mandibular premolar extraction. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 125(4), 480-7.
Freitas KM, et al. Postretention Relapse of Mandibular Anterior Crowding in Patients Treated Without Mandibular Premolar Extraction. Am J Orthod Dentofacial Orthop. 2004;125(4):480-7. PubMed PMID: 15067265.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Postretention relapse of mandibular anterior crowding in patients treated without mandibular premolar extraction. AU - Freitas,Karina M S, AU - de Freitas,Marcos Roberto, AU - Henriques,José Fernando Castanha, AU - Pinzan,Arnaldo, AU - Janson,Guilherme, PY - 2004/4/7/pubmed PY - 2004/5/27/medline PY - 2004/4/7/entrez SP - 480 EP - 7 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 - 125 IS - 4 N2 - Treatment stability is one of the most important objectives in orthodontics, but, despite decades of research, it is still agreed that the stability of aligned teeth is variable and largely unpredictable. This study aimed to evaluate the relapse of mandibular anterior crowding in patients treated without mandibular premolar extraction. The sample comprised 40 patients of both sexes with Class I or II malocclusions who received nonextraction treatment in the mandibular arch with edgewise mechanics. Lateral cephalograms and dental casts of each patient were obtained at pretreament, posttreatment, and 5 years postretention. Relapse of mandibular anterior crowding was assessed, and associations between this relapse and other clinical factors were also investigated. Mandibular anterior crowding was measured by the Little irregularity index, and the data were evaluated by the Mann-Whitney test. The mean relapse of mandibular anterior crowding was 1.95 mm (26.54%) over the long term. No clinical factor studied was predictive of crowding relapse in the long term. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/15067265/Postretention_relapse_of_mandibular_anterior_crowding_in_patients_treated_without_mandibular_premolar_extraction_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889540603010096 DB - PRIME DP - Unbound Medicine ER -