Authors: CHANG, H. P.¹; LIU, P. H.²; YANG, Y. H.³; LIN, H. C.⁴; CHANG, C. H.²

Source: Journal of Oral Rehabilitation, Volume 33, Number 3, March 2006 , pp. 183-193(11)

Publisher: Wiley-Blackwell

Abstract:

summary 

The purpose of this study was to provide more information about the morphological characteristics of the craniofacial complex in mandibular prognathism. Forty young adult males having mandibular prognathism were compared with 40 having normal occlusion. This was conducted to carry out geometric morphometric assessments to localize alterations, using Procrustes analysis and thin-plate spline analysis, in addition to conventional cephalometric techniques. Procrustes analysis indicated that the mean craniofacial, midfacial and mandibular morphology was significantly different in prognathic subjects compared with normal controls. This finding was corroborated by the multivariate Hotelling T²-test of cephalometric variables. Mandibular prognathism demonstrated a shorter and slightly retropositioned maxilla, a greater total length and anterior positioning of the mandible. Thin-plate spline analysis revealed a developmental diminution of the palatomaxillary region anteroposteriorly and a developmental elongation of the mandible anteroposteriorly, leading to the appearance of a prognathic mandibular profile. In conclusion, thin-plate spline analysis seems to provide a valuable supplement for conventional cephalometric analysis because the complex patterns of craniofacial shape change are visualized suggestive by means of grid deformations.

Keywords: craniofacial complex; mandibular prognathism; geometric morphometrics; Procrustes analysis; thin-plate spline analysis

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1365-2842.2005.01563.x

Affiliations: 1: Department of Orthodontics and Graduate Institute of Dental Sciences, Kaohsiung Medical University, Kaohsiung 2: Institute of Biomechanical Engineering, National Cheng Kung University, Tainan 3: Graduate Institute of Oral Health Sciences (Biostatistics), Kaohsiung Medical University, and Statistical Analysis Laboratory, Department of Clinical Research, Kaohsiung Medical University Hospital, Kaohsiung 4: Department of Orthodontics and Graduate Institute of Oral Rehabilitation, Taipei Medical University, Taipei, Taiwan

Publication date: 2006-03-01

Related content

• In this: publication
• By this: publisher
• In this Subject: Dentistry
• By this author: CHANG, H. P. ;  LIU, P. H. ;  YANG, Y. H. ;  LIN, H. C. ;  CHANG, C. H.

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers