J Dent Rehabil Appl Sci.  2018 Jun;34(2):97-103. 10.14368/jdras.2018.34.2.97.

Evaluation of Bonwill triangle using cone beam computerized tomography in Korean

• Kong HJ
• Oh SC

• KMID: 2422651
• DOI: http://doi.org/10.14368/jdras.2018.34.2.97

Abstract

PURPOSE
The aim of this study was to evaluate the Bonwill triangle of Korean using the cone beam computerized tomography (Cone-beam CT).
MATERIALS AND METHODS
120 Koreans (60 males and 60 females) who visited Daejeon Dental College Hospital of Wonkwang University and who underwent the Cone-beam CT were selected. The Cone-beam CT images were analysed with Invivo 5.1 (Anatomage, San Jose, USA). After reorientation of axis, the intercondylar distance was measured by clicking both middle points of condyle. And the condyle-incisor distance was measured by clicking the middle point of condyle and contact point of the mandibular central incisor's incisal edge. The collected data were analysed using the SPSS Version 23.0 (IBM Inc., Armonk, USA) and statistical significance was verified by gender using independent t-test.
RESULTS
The mean intercondylar distance of Korean was 105.9 mm, and the male (108.3 mm) was statistically significantly larger than the female (103.4 mm). The mean condyle-incisor distance of Korean was 105.2 mm, and the male (108.1 mm) was statistically significantly larger than the female (102.3 mm).
CONCLUSION
The mean intercondylar distance of Korean in this study was 105.9 mm that was smaller than well-known 110 mm of Caucasian and the male was statistically significantly larger than the female. Within the limitations of this study, it would be necessary to use the articulator which can adjust the intercondylar distance according to the individual for prosthodontic treatment of Korean.

Keyword

Bonwill triangle; articulator; intercondylar distance; cone-beam CT

MeSH Terms

Cone-Beam Computed Tomography*
Dental Articulators
Female
Humans
Male

Figure

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

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  Fig. 2 Schematic diagram of intercondylar distance (A) and condyle-incisor distance (B). La: lateral-most point of condyle; Me: medial-most point of condyle; Mi: middle point of condyle; C: contact point of the mandibular central incisor’s incisal edge.

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  Fig. 3 Intercondylar distance.

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  Fig. 4 Condyle-incisor distance.

Reference

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