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Dental arch widths and mandibular-maxillary base widths in Class II malocclusions between early mixed and permanent dentitions.
Angle Orthod. 2003 Dec; 73(6):674-85.AO

Abstract

The aim of the study was to analyze the transverse morphology and development of the dental arches and skeletal mandibular-maxillary bases in untreated Class II malocclusions. Using the records of the Belfast Growth Study, a Class II division 1 group (II/1) and a Class II division 2 group (II/2) were compared with a Class I group and a control group with good occlusion. On posteroanterior cephalograms, maxillary skeletal base width and bigonial and biantegonial widths were determined at two-year intervals between seven and 15 years. Maxillary and mandibular intermolar widths were measured on the associated study casts. As a result, maxillary skeletal base widths were smallest in the Class II/1 subjects. No statistically significant differences were found among the groups for the skeletal mandibular widths. With respect to the development of the dental arches, maxillary intermolar widths were smaller in the Class II/1 group than in the Class I and the good-occlusion groups. These group differences were present for the total period of observation, ie, seven to 15 years, and statistically significant at most ages. When the relative difference between the maxillary and the mandibular intermolar widths was examined, the Class II/1 cases were found to have the largest average difference (about -2.5 mm for boys and -1.5 mm for girls), indicating a relatively narrow maxillary arch. Less pronounced molar differences were found in the Class II/2 group. In the Class II/1 subjects the deviations in molar differences observed at 15 years of age were established already at 7 years of age and maintained during 7 and 15 years of age.

Authors+Show Affiliations

Department of Orthodontics, University of Heidelberg, Heidelberg, Germany. christopher_lux@med.uni-heidelberg.deNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

14719732

Citation

Lux, Christopher J., et al. "Dental Arch Widths and Mandibular-maxillary Base Widths in Class II Malocclusions Between Early Mixed and Permanent Dentitions." The Angle Orthodontist, vol. 73, no. 6, 2003, pp. 674-85.
Lux CJ, Conradt C, Burden D, et al. Dental arch widths and mandibular-maxillary base widths in Class II malocclusions between early mixed and permanent dentitions. Angle Orthod. 2003;73(6):674-85.
Lux, C. J., Conradt, C., Burden, D., & Komposch, G. (2003). Dental arch widths and mandibular-maxillary base widths in Class II malocclusions between early mixed and permanent dentitions. The Angle Orthodontist, 73(6), 674-85.
Lux CJ, et al. Dental Arch Widths and Mandibular-maxillary Base Widths in Class II Malocclusions Between Early Mixed and Permanent Dentitions. Angle Orthod. 2003;73(6):674-85. PubMed PMID: 14719732.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dental arch widths and mandibular-maxillary base widths in Class II malocclusions between early mixed and permanent dentitions. AU - Lux,Christopher J, AU - Conradt,Christian, AU - Burden,Donald, AU - Komposch,Gerda, PY - 2004/1/15/pubmed PY - 2004/3/5/medline PY - 2004/1/15/entrez SP - 674 EP - 85 JF - The Angle orthodontist JO - Angle Orthod VL - 73 IS - 6 N2 - The aim of the study was to analyze the transverse morphology and development of the dental arches and skeletal mandibular-maxillary bases in untreated Class II malocclusions. Using the records of the Belfast Growth Study, a Class II division 1 group (II/1) and a Class II division 2 group (II/2) were compared with a Class I group and a control group with good occlusion. On posteroanterior cephalograms, maxillary skeletal base width and bigonial and biantegonial widths were determined at two-year intervals between seven and 15 years. Maxillary and mandibular intermolar widths were measured on the associated study casts. As a result, maxillary skeletal base widths were smallest in the Class II/1 subjects. No statistically significant differences were found among the groups for the skeletal mandibular widths. With respect to the development of the dental arches, maxillary intermolar widths were smaller in the Class II/1 group than in the Class I and the good-occlusion groups. These group differences were present for the total period of observation, ie, seven to 15 years, and statistically significant at most ages. When the relative difference between the maxillary and the mandibular intermolar widths was examined, the Class II/1 cases were found to have the largest average difference (about -2.5 mm for boys and -1.5 mm for girls), indicating a relatively narrow maxillary arch. Less pronounced molar differences were found in the Class II/2 group. In the Class II/1 subjects the deviations in molar differences observed at 15 years of age were established already at 7 years of age and maintained during 7 and 15 years of age. SN - 0003-3219 UR - https://www.unboundmedicine.com/medline/citation/14719732/Dental_arch_widths_and_mandibular_maxillary_base_widths_in_Class_II_malocclusions_between_early_mixed_and_permanent_dentitions_ L2 - https://meridian.allenpress.com/angle-orthodontist/article-lookup/doi/10.1043/0003-3219(2003)073<0674:DAWAMB>2.0.CO;2 DB - PRIME DP - Unbound Medicine ER -