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Nonextraction orthodontic therapy: posttreatment dental and skeletal stability.
Am J Orthod Dentofacial Orthop 1987; 92(4):321-8AJ

Abstract

To assess the long-term stability of nonextraction orthodontic treatment, the dental cast and cephalometric records of 28 cases were evaluated. Thirty cephalometric and seven cast parameters were examined before treatment, posttreatment, and an average of almost 8 years postretention. Results showed overall long-term stability to be relatively good. Relapse patterns seen were similar in nature, but intermediate in extent, between untreated normals and four first premolar extraction cases. Significant decreases were seen in arch length and intercanine width during the postretention period despite minimal changes during treatment. Incisor irregularly increased slightly postretention; intermolar width, overjet, and overbite displayed considerable long-term stability. Mandibular incisor mesiodistal and faciolingual dimensions were not associated with either pretreatment or posttreatment incisor crowding. Class II malocclusions with large ANB values and shorter mandibular lengths showed increased incisor irregularity, shorter arch lengths, and deeper overbites at the postretention stage, suggesting that the amount and direction of facial growth may have been partially responsible for maturational changes seen during the postretention period.

Authors+Show Affiliations

Department of Orthodontics, Baylor College of Dentistry, Dallas, Texas.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

3477951

Citation

Glenn, G, et al. "Nonextraction Orthodontic Therapy: Posttreatment Dental and Skeletal Stability." 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. 92, no. 4, 1987, pp. 321-8.
Glenn G, Sinclair PM, Alexander RG. Nonextraction orthodontic therapy: posttreatment dental and skeletal stability. Am J Orthod Dentofacial Orthop. 1987;92(4):321-8.
Glenn, G., Sinclair, P. M., & Alexander, R. G. (1987). Nonextraction orthodontic therapy: posttreatment dental and skeletal stability. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 92(4), pp. 321-8.
Glenn G, Sinclair PM, Alexander RG. Nonextraction Orthodontic Therapy: Posttreatment Dental and Skeletal Stability. Am J Orthod Dentofacial Orthop. 1987;92(4):321-8. PubMed PMID: 3477951.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nonextraction orthodontic therapy: posttreatment dental and skeletal stability. AU - Glenn,G, AU - Sinclair,P M, AU - Alexander,R G, PY - 1987/10/1/pubmed PY - 1987/10/1/medline PY - 1987/10/1/entrez SP - 321 EP - 8 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 - 92 IS - 4 N2 - To assess the long-term stability of nonextraction orthodontic treatment, the dental cast and cephalometric records of 28 cases were evaluated. Thirty cephalometric and seven cast parameters were examined before treatment, posttreatment, and an average of almost 8 years postretention. Results showed overall long-term stability to be relatively good. Relapse patterns seen were similar in nature, but intermediate in extent, between untreated normals and four first premolar extraction cases. Significant decreases were seen in arch length and intercanine width during the postretention period despite minimal changes during treatment. Incisor irregularly increased slightly postretention; intermolar width, overjet, and overbite displayed considerable long-term stability. Mandibular incisor mesiodistal and faciolingual dimensions were not associated with either pretreatment or posttreatment incisor crowding. Class II malocclusions with large ANB values and shorter mandibular lengths showed increased incisor irregularity, shorter arch lengths, and deeper overbites at the postretention stage, suggesting that the amount and direction of facial growth may have been partially responsible for maturational changes seen during the postretention period. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/3477951/Nonextraction_orthodontic_therapy:_posttreatment_dental_and_skeletal_stability_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0889-5406(87)90333-7 DB - PRIME DP - Unbound Medicine ER -