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Effects of a modified acrylic bonded rapid maxillary expansion appliance and vertical chin cap on dentofacial structures.
Angle Orthod. 2002 Feb; 72(1):61-71.AO

Abstract

The aim of this study was to determine the sagittal, transverse, and vertical effects of a modified acrylic bonded rapid maxillary expansion (RME) device used with a vertical chin cap on dentofacial structures. The study group consisted of 34 patients (25 girls and 9 boys) who were selected without regard to their skeletal class and gender. All subjects had permanent dentition (mean age, 12.7 years) and needed maxillary expansion. Study Group I (RME only) was composed of 17 subjects, and study Group II (RME with vertical chin cap) was composed of 17 subjects. Twenty-nine measurements were made on the patients' cephalometric films and plaster models. The means and standard deviations for linear and angular cephalometric measurements were analyzed statistically, and intra-group and inter group changes were evaluated by paired and Student's t-tests using SPSS 10.1 for windows. We found that the maxilla moved anteriorly relative to the anterior cranial base. The nasal width, maxillary width, intercanine width, mandibular intermolar width, maxillary intermolar width, and overjet all increased, while the upper molars tipped buccally in both groups. In Group I, the mandible rotated posteriorly, the lower anterior facial height increased, and the overbite decreased. These effects were reduced in Group II. We conclude that the vertical chin cap is an effective appliance for preventing the adverse vertical effects of RME in patients with a crossbite and a vertical growth pattern.

Authors+Show Affiliations

Faculty of Dentistry, Department of Orthodontics, Selcuk University, Konya, Turkey. fbasciftci@hotmail.comNo affiliation info available

Pub Type(s)

Clinical Trial
Controlled Clinical Trial
Journal Article

Language

eng

PubMed ID

11843276

Citation

Basciftci, F A., and A I. Karaman. "Effects of a Modified Acrylic Bonded Rapid Maxillary Expansion Appliance and Vertical Chin Cap On Dentofacial Structures." The Angle Orthodontist, vol. 72, no. 1, 2002, pp. 61-71.
Basciftci FA, Karaman AI. Effects of a modified acrylic bonded rapid maxillary expansion appliance and vertical chin cap on dentofacial structures. Angle Orthod. 2002;72(1):61-71.
Basciftci, F. A., & Karaman, A. I. (2002). Effects of a modified acrylic bonded rapid maxillary expansion appliance and vertical chin cap on dentofacial structures. The Angle Orthodontist, 72(1), 61-71.
Basciftci FA, Karaman AI. Effects of a Modified Acrylic Bonded Rapid Maxillary Expansion Appliance and Vertical Chin Cap On Dentofacial Structures. Angle Orthod. 2002;72(1):61-71. PubMed PMID: 11843276.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of a modified acrylic bonded rapid maxillary expansion appliance and vertical chin cap on dentofacial structures. AU - Basciftci,F A, AU - Karaman,A I, PY - 2002/2/15/pubmed PY - 2002/5/15/medline PY - 2002/2/15/entrez SP - 61 EP - 71 JF - The Angle orthodontist JO - Angle Orthod VL - 72 IS - 1 N2 - The aim of this study was to determine the sagittal, transverse, and vertical effects of a modified acrylic bonded rapid maxillary expansion (RME) device used with a vertical chin cap on dentofacial structures. The study group consisted of 34 patients (25 girls and 9 boys) who were selected without regard to their skeletal class and gender. All subjects had permanent dentition (mean age, 12.7 years) and needed maxillary expansion. Study Group I (RME only) was composed of 17 subjects, and study Group II (RME with vertical chin cap) was composed of 17 subjects. Twenty-nine measurements were made on the patients' cephalometric films and plaster models. The means and standard deviations for linear and angular cephalometric measurements were analyzed statistically, and intra-group and inter group changes were evaluated by paired and Student's t-tests using SPSS 10.1 for windows. We found that the maxilla moved anteriorly relative to the anterior cranial base. The nasal width, maxillary width, intercanine width, mandibular intermolar width, maxillary intermolar width, and overjet all increased, while the upper molars tipped buccally in both groups. In Group I, the mandible rotated posteriorly, the lower anterior facial height increased, and the overbite decreased. These effects were reduced in Group II. We conclude that the vertical chin cap is an effective appliance for preventing the adverse vertical effects of RME in patients with a crossbite and a vertical growth pattern. SN - 0003-3219 UR - https://www.unboundmedicine.com/medline/citation/11843276/Effects_of_a_modified_acrylic_bonded_rapid_maxillary_expansion_appliance_and_vertical_chin_cap_on_dentofacial_structures_ L2 - https://meridian.allenpress.com/angle-orthodontist/article-lookup/doi/10.1043/0003-3219(2002)072<0061:EOAMAB>2.0.CO;2 DB - PRIME DP - Unbound Medicine ER -