Growth contributions to Class II corrections based on models of mandibular morphology

Bruce W. Hultgren; Robert J. Isaacson; Arthur G. Erdman; Frank W. Worms; E. Dianne Rekow

doi:10.1016/0002-9416(80)90276-6

Growth contributions to Class II corrections based on models of mandibular morphology

Bruce W. Hultgren, Robert J. Isaacson, Arthur G. Erdman, Frank W. Worms, E. Dianne Rekow

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Various morphologies of human models are modeled with various growth patterns to demonstrate the role of mandibular morphology on growth contributions to Class II corrections. Growth patterns are described by centers of mandibular rotation relative to the cranial base. Centers of rotation are used to determine several parameters of growth generated by a computer programmed to show growth effects. The direction and amount of condylar growth are held constant. With condylar growth constant, various centers of rotation of the mandible reveal that maximum Class II molar correction is present when the condyle is vertically located farthest from the molar. Of lesser importance, Class II corrections are greater when the condyle is anteroposteriorly closest to the molar.

Original language	English (US)
Pages (from-to)	310-320
Number of pages	11
Journal	American Journal of Orthodontics
Volume	78
Issue number	3
DOIs	https://doi.org/10.1016/0002-9416(80)90276-6
State	Published - 1980

Bibliographical note

Funding Information:
From the Division of Orthodontics, School of Dentistry, and Department of Mechanical Engineering, University of Minnesota, and Department of Growth and Development, School of Dentistry, University of California San Francisco. This research was supported in part by United States Public Health Service Research Grant DE-0352X and University of Minnesota Grant-in-Aid Research Fund 441-0325-4909-02. Correspondence and reprint requests should be addressed to Dr. Robert J. Isaacson. Department of Growth and Development, School of Dentistry. University of California at San Francisco. Calif. 94143.

Keywords

Class II corrections
Mandibular shape
centers of rotation
growth projection
mandibular rotation

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10.1016/0002-9416(80)90276-6

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title = "Growth contributions to Class II corrections based on models of mandibular morphology",

abstract = "Various morphologies of human models are modeled with various growth patterns to demonstrate the role of mandibular morphology on growth contributions to Class II corrections. Growth patterns are described by centers of mandibular rotation relative to the cranial base. Centers of rotation are used to determine several parameters of growth generated by a computer programmed to show growth effects. The direction and amount of condylar growth are held constant. With condylar growth constant, various centers of rotation of the mandible reveal that maximum Class II molar correction is present when the condyle is vertically located farthest from the molar. Of lesser importance, Class II corrections are greater when the condyle is anteroposteriorly closest to the molar.",

keywords = "Class II corrections, Mandibular shape, centers of rotation, growth projection, mandibular rotation",

author = "Hultgren, {Bruce W.} and Isaacson, {Robert J.} and Erdman, {Arthur G.} and Worms, {Frank W.} and Rekow, {E. Dianne}",

note = "Funding Information: From the Division of Orthodontics, School of Dentistry, and Department of Mechanical Engineering, University of Minnesota, and Department of Growth and Development, School of Dentistry, University of California San Francisco. This research was supported in part by United States Public Health Service Research Grant DE-0352X and University of Minnesota Grant-in-Aid Research Fund 441-0325-4909-02. Correspondence and reprint requests should be addressed to Dr. Robert J. Isaacson. Department of Growth and Development, School of Dentistry. University of California at San Francisco. Calif. 94143.",

year = "1980",

doi = "10.1016/0002-9416(80)90276-6",

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T1 - Growth contributions to Class II corrections based on models of mandibular morphology

AU - Hultgren, Bruce W.

AU - Isaacson, Robert J.

AU - Erdman, Arthur G.

AU - Worms, Frank W.

AU - Rekow, E. Dianne

N1 - Funding Information: From the Division of Orthodontics, School of Dentistry, and Department of Mechanical Engineering, University of Minnesota, and Department of Growth and Development, School of Dentistry, University of California San Francisco. This research was supported in part by United States Public Health Service Research Grant DE-0352X and University of Minnesota Grant-in-Aid Research Fund 441-0325-4909-02. Correspondence and reprint requests should be addressed to Dr. Robert J. Isaacson. Department of Growth and Development, School of Dentistry. University of California at San Francisco. Calif. 94143.

PY - 1980

Y1 - 1980

N2 - Various morphologies of human models are modeled with various growth patterns to demonstrate the role of mandibular morphology on growth contributions to Class II corrections. Growth patterns are described by centers of mandibular rotation relative to the cranial base. Centers of rotation are used to determine several parameters of growth generated by a computer programmed to show growth effects. The direction and amount of condylar growth are held constant. With condylar growth constant, various centers of rotation of the mandible reveal that maximum Class II molar correction is present when the condyle is vertically located farthest from the molar. Of lesser importance, Class II corrections are greater when the condyle is anteroposteriorly closest to the molar.

AB - Various morphologies of human models are modeled with various growth patterns to demonstrate the role of mandibular morphology on growth contributions to Class II corrections. Growth patterns are described by centers of mandibular rotation relative to the cranial base. Centers of rotation are used to determine several parameters of growth generated by a computer programmed to show growth effects. The direction and amount of condylar growth are held constant. With condylar growth constant, various centers of rotation of the mandible reveal that maximum Class II molar correction is present when the condyle is vertically located farthest from the molar. Of lesser importance, Class II corrections are greater when the condyle is anteroposteriorly closest to the molar.

KW - Class II corrections

KW - Mandibular shape

KW - centers of rotation

KW - growth projection

KW - mandibular rotation

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JO - American Journal of Orthodontics and Dentofacial Orthopedics

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ER -

Growth contributions to Class II corrections based on models of mandibular morphology

Abstract

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