J Dent Rehabil Appl Sci.  2019 Dec;35(4):214-219. 10.14368/jdras.2019.35.4.214.

Relationship between inter-condylar width and inter-maxillary first molar width

• Oh SC
• Kong HJ

• KMID: 2470626
• DOI: http://doi.org/10.14368/jdras.2019.35.4.214

Abstract

PURPOSE
The aim of this study was to evaluate the correlation between inter-condylar width and inter-maxillary first molar width to present the criteria for prosthetic reconstruction of dental arch width in maxillary and mandibular fully edentulous patients.
MATERIALS AND METHODS
120 Koreans (60 males and 60 females) who underwent the cone beam computerized tomography (Cone-beam CT) were selected. The Cone-beam CT images were analysed using Invivo 5.1. After reorientation of axis, inter-maxillary first molar width was measured by clicking both mesio-buccal cusp tip of maxillary first molar. And inter-condylar width was measured by clicking both middle points of condyles. The collected data were analysed with SPSS Version 20.0 and statistical significance of the correlation between inter-condylar width and inter-maxillary first molar width was verified by Pearson's correlation analysis.
RESULTS
The mean inter-condylar width of Korean was 105.9 mm, and that of male (108.3 mm) was statistically significantly wider than the female (103.4 mm). The inter-maxillary first molar width of Korean was 57.1 mm, and that of male (57.9 mm) was statistically significantly wider than the female (56.2 mm). Pearson's correlation analysis between inter-condylar width and inter-maxillary first molar width showed a Pearson correlation coefficient of 0.614 and statistically significantly positive correlation.
CONCLUSION
Inter-condylar width and inter-maxillary first molar width showed positive correlation and the average ratio of inter-condylar with and inter-maxillary first molar width was 1:0.54. Based on the results of this limited study, inter-condylar width can be used as a guide for setting up dental arch width in fully edentulous patient.

Keyword

fully edentulous patient; inter-condylar width; dental arch width; cone-beam CT

MeSH Terms

Cone-Beam Computed Tomography
Dental Arch
Female
Humans
Male
Molar*

Figure

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  Fig. 1 Reorientation of axis. (A) Sagittal view, (B) Coronal view, (C) Axial view.

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  Fig. 2 Inter-maxillary first molar width.

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  Fig. 3 Inter-condylar width.

Reference

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