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Short-term skeletal and dental effects of the Xbow appliance as measured on lateral cephalograms.
Am J Orthod Dentofacial Orthop. 2009 Dec; 136(6):822-32.AJ

Abstract

INTRODUCTION

Our objective was to determine the short-term skeletal and dental effects of the Xbow appliance when compared with an equivalent untreated control group as measured on lateral cephalograms.

METHODS

A prospective sample of 69 consecutive Class II patients treated with only the Xbow appliance was compared with 30 historical Class II untreated controls. Standardized lateral cephalograms were used.

RESULTS

Two patients from the treatment group did not complete treatment. The 2 groups appeared similar at pretreatment with the exception of the positions of the maxillary central incisor (2.9 mm more protruded in Xbow group), the mandibular incisor (1.7 mm more protruded with the Xbow group), and Point A (2.8 mm forward restriction in Xbow group). There were statistically significant differences for 9 of the 14 evaluated cephalometric variables when normal growth changes were factored out. Those differences favoring the Xbow for changes in the direction of Class II correction include SNA, ANB, L1-MP, L1 minus Pg, overjet, U6 minus A, L6 minus Pg, and A-OLp. Meanwhile, the control group showed a statistically significant decrease in the mandibular plane angle compared with the Xbow group.

CONCLUSIONS

Skeletally, a diminution of maxillary protrusion without mandibular advancement and an increase of the vertical dimension were found. Dentally, overjet correction was accomplished by an increase in mandibular incisor protrusion without maxillary incisor movement. The maxillary molars were distalized whereas the mandibular molars were mesialized.

Authors+Show Affiliations

Orthodontic Graduate Program, Department of Dentistry, University of Alberta, Edmonton, Alberta, Canada. carlosflores@ualberta.caNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Controlled Clinical Trial
Journal Article

Language

eng

PubMed ID

19962605

Citation

Flores-Mir, Carlos, et al. "Short-term Skeletal and Dental Effects of the Xbow Appliance as Measured On Lateral Cephalograms." 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. 136, no. 6, 2009, pp. 822-32.
Flores-Mir C, Barnett G, Higgins DW, et al. Short-term skeletal and dental effects of the Xbow appliance as measured on lateral cephalograms. Am J Orthod Dentofacial Orthop. 2009;136(6):822-32.
Flores-Mir, C., Barnett, G., Higgins, D. W., Heo, G., & Major, P. W. (2009). Short-term skeletal and dental effects of the Xbow appliance as measured on lateral cephalograms. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 136(6), 822-32. https://doi.org/10.1016/j.ajodo.2008.01.021
Flores-Mir C, et al. Short-term Skeletal and Dental Effects of the Xbow Appliance as Measured On Lateral Cephalograms. Am J Orthod Dentofacial Orthop. 2009;136(6):822-32. PubMed PMID: 19962605.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Short-term skeletal and dental effects of the Xbow appliance as measured on lateral cephalograms. AU - Flores-Mir,Carlos, AU - Barnett,Gregory, AU - Higgins,Duncan W, AU - Heo,Giseon, AU - Major,Paul W, PY - 2007/11/01/received PY - 2008/01/01/revised PY - 2008/01/01/accepted PY - 2009/12/8/entrez PY - 2009/12/8/pubmed PY - 2009/12/23/medline SP - 822 EP - 32 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 - 136 IS - 6 N2 - INTRODUCTION: Our objective was to determine the short-term skeletal and dental effects of the Xbow appliance when compared with an equivalent untreated control group as measured on lateral cephalograms. METHODS: A prospective sample of 69 consecutive Class II patients treated with only the Xbow appliance was compared with 30 historical Class II untreated controls. Standardized lateral cephalograms were used. RESULTS: Two patients from the treatment group did not complete treatment. The 2 groups appeared similar at pretreatment with the exception of the positions of the maxillary central incisor (2.9 mm more protruded in Xbow group), the mandibular incisor (1.7 mm more protruded with the Xbow group), and Point A (2.8 mm forward restriction in Xbow group). There were statistically significant differences for 9 of the 14 evaluated cephalometric variables when normal growth changes were factored out. Those differences favoring the Xbow for changes in the direction of Class II correction include SNA, ANB, L1-MP, L1 minus Pg, overjet, U6 minus A, L6 minus Pg, and A-OLp. Meanwhile, the control group showed a statistically significant decrease in the mandibular plane angle compared with the Xbow group. CONCLUSIONS: Skeletally, a diminution of maxillary protrusion without mandibular advancement and an increase of the vertical dimension were found. Dentally, overjet correction was accomplished by an increase in mandibular incisor protrusion without maxillary incisor movement. The maxillary molars were distalized whereas the mandibular molars were mesialized. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/19962605/Short_term_skeletal_and_dental_effects_of_the_Xbow_appliance_as_measured_on_lateral_cephalograms_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(09)00874-9 DB - PRIME DP - Unbound Medicine ER -