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Cephalometric variables predicting the long-term success or failure of combined rapid maxillary expansion and facial mask therapy.
Am J Orthod Dentofacial Orthop 2004; 126(1):16-22AJ

Abstract

The aim of this study was to select a model of cephalometric variables to predict the results of early treatment of Class III malocclusion with rapid maxillary expansion and facemask therapy followed by comprehensive treatment with fixed appliances. Lateral cephalograms of 42 patients (20 boys, 22 girls) with Class III malocclusion were analyzed at the start of treatment (mean age 8 years 6 months +/- 2 years, at stage I in cervical vertebral maturation). All patients were reevaluated after a mean period of 6 years 6 months (at stage IV or V in cervical vertebral maturation) that included active treatment plus retention. At this time, the sample was divided into 2 groups according to occlusal criteria: a successful group (30 patients) and an unsuccessful group (12 patients). Discriminant analysis was applied to select pretreatment predictive variables of long-term treatment outcome. Stepwise variable selection of the cephalometric measurements at the first observation identified 3 predictive variables. Orthopedic treatment of Class III malocclusion might be unfavorable over the long term when a patient's pretreatment cephalometric records exhibit a long mandibular ramus (ie, increased posterior facial height), an acute cranial base angle, and a steep mandibular plane angle. On the basis of the equation generated by the multivariate statistical method, the outcome of interceptive orthopedic treatment for each new patient with Class III malocclusion can be predicted with a probability error of 16.7%.

Authors+Show Affiliations

Department of Orthodontics, University of Florence, Via del Ponte di Mezzo 46-48, Florence 50127, Italy. tbacc@tiscali.itNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article

Language

eng

PubMed ID

15224054

Citation

Baccetti, Tiziano, et al. "Cephalometric Variables Predicting the Long-term Success or Failure of Combined Rapid Maxillary Expansion and Facial Mask Therapy." 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. 126, no. 1, 2004, pp. 16-22.
Baccetti T, Franchi L, McNamara JA. Cephalometric variables predicting the long-term success or failure of combined rapid maxillary expansion and facial mask therapy. Am J Orthod Dentofacial Orthop. 2004;126(1):16-22.
Baccetti, T., Franchi, L., & McNamara, J. A. (2004). Cephalometric variables predicting the long-term success or failure of combined rapid maxillary expansion and facial mask therapy. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 126(1), pp. 16-22.
Baccetti T, Franchi L, McNamara JA. Cephalometric Variables Predicting the Long-term Success or Failure of Combined Rapid Maxillary Expansion and Facial Mask Therapy. Am J Orthod Dentofacial Orthop. 2004;126(1):16-22. PubMed PMID: 15224054.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cephalometric variables predicting the long-term success or failure of combined rapid maxillary expansion and facial mask therapy. AU - Baccetti,Tiziano, AU - Franchi,Lorenzo, AU - McNamara,James A,Jr PY - 2004/6/30/pubmed PY - 2004/8/6/medline PY - 2004/6/30/entrez SP - 16 EP - 22 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 - 126 IS - 1 N2 - The aim of this study was to select a model of cephalometric variables to predict the results of early treatment of Class III malocclusion with rapid maxillary expansion and facemask therapy followed by comprehensive treatment with fixed appliances. Lateral cephalograms of 42 patients (20 boys, 22 girls) with Class III malocclusion were analyzed at the start of treatment (mean age 8 years 6 months +/- 2 years, at stage I in cervical vertebral maturation). All patients were reevaluated after a mean period of 6 years 6 months (at stage IV or V in cervical vertebral maturation) that included active treatment plus retention. At this time, the sample was divided into 2 groups according to occlusal criteria: a successful group (30 patients) and an unsuccessful group (12 patients). Discriminant analysis was applied to select pretreatment predictive variables of long-term treatment outcome. Stepwise variable selection of the cephalometric measurements at the first observation identified 3 predictive variables. Orthopedic treatment of Class III malocclusion might be unfavorable over the long term when a patient's pretreatment cephalometric records exhibit a long mandibular ramus (ie, increased posterior facial height), an acute cranial base angle, and a steep mandibular plane angle. On the basis of the equation generated by the multivariate statistical method, the outcome of interceptive orthopedic treatment for each new patient with Class III malocclusion can be predicted with a probability error of 16.7%. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/15224054/Cephalometric_variables_predicting_the_long_term_success_or_failure_of_combined_rapid_maxillary_expansion_and_facial_mask_therapy_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889540604001556 DB - PRIME DP - Unbound Medicine ER -