Chin development as a result of differential jaw growth

Steven D Marshall; Laura E Low; Nathan E Holton; Robert G Franciscus; Mike Frazier; Fang Qian; Kyle Mann; Galen Schneider; Jill E Scott; Thomas E Southard

doi:10.1016/j.ajodo.2009.05.038

Back

Chin development as a result of differential jaw growth

Journal article

Peer reviewed

Chin development as a result of differential jaw growth

Steven D Marshall, Laura E Low, Nathan E Holton, Robert G Franciscus, Mike Frazier, Fang Qian, Kyle Mann, Galen Schneider, Jill E Scott and Thomas E Southard

American journal of orthodontics and dentofacial orthopedics, Vol.139(4), pp.456-464

04/2011

DOI: 10.1016/j.ajodo.2009.05.038

PMID: 21457856

View Online

Abstract

During facial growth, the maxilla and mandible translate downward and forward. Although the forward displacement of the maxilla is less than that of the mandible, the interarch relationship of the teeth in the sagittal view during growth remains essentially unchanged. Interdigitation is thought to provide a compensatory (tooth movement) mechanism for maintaining the pattern of occlusion during growth: the maxillary teeth move anteriorly relative to the maxilla while the mandibular teeth move posteriorly relative to the basilar mandible. The purpose of this study was to investigate the hypothesis that the human chin develops as a result of this process. Twenty-five untreated subjects from the Iowa Facial Growth Study with Class I normal occlusion were randomly selected based on availability of cephalograms at T1 (mean = 8.32 yr) and T2 (mean = 19.90 yr). Measurements of growth (T2 minus T1) parallel to the Frankfort horizontal (FH) for the maxilla, maxillary dentition, mandible, mandibular dentition, and pogonion (Pg) were made. Relative to Pg (a stable bony landmark), B-point moved posteriorly, on average 2.34 mm during growth, and bony chin development (B-point to Pg) increased concomitantly. Similarly, the mandibular and maxillary incisors moved posteriorly relative to Pg 2.53 mm and 2.76 mm, respectively. A-point, relative to Pg, moved posteriorly 4.47 mm during growth. Bony chin development during facial growth occurs, in part, from differential jaw growth and compensatory dentoalveolar movements.

Mandibular Condyle - anatomy & histology

Follow-Up Studies

Alveolar Process - growth & development

Humans

Mandible - growth & development

Chin - growth & development

Male

Cephalometry

Maxilla - growth & development

Maxilla - anatomy & histology

Nasal Bone - anatomy & histology

Mandible - anatomy & histology

Molar - anatomy & histology

Dentition

Dental Arch - growth & development

Female

Incisor - anatomy & histology

Child

Dental Occlusion

Details

Title: Subtitle: Chin development as a result of differential jaw growth
Creators: Steven D Marshall - Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, IA 52242, USA. steven-marshall@uiowa.edu
Laura E Low
Nathan E Holton
Robert G Franciscus
Mike Frazier
Fang Qian
Kyle Mann
Galen Schneider
Jill E Scott
Thomas E Southard
Resource Type: Journal article
Publication Details: American journal of orthodontics and dentofacial orthopedics, Vol.139(4), pp.456-464
DOI: 10.1016/j.ajodo.2009.05.038
PMID: 21457856
NLM abbreviation: Am J Orthod Dentofacial Orthop
ISSN: 0889-5406
eISSN: 1097-6752
Publisher: United States
Language: English
Date published: 04/2011
Academic Unit: Preventive and Community Dentistry; Orthodontics; Anthropology; Anatomy and Cell Biology; Dentistry Administration; Prosthodontics; Craniofacial Anomalies Research Center; Dental Research
Record Identifier: 9983983647702771

Metrics

44 Record Views

20 Times Cited - Web of Science