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KMID : 0362420150530040310
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Journal of Korean Academy of Prosthodontics
2015 Volume.53 No. 4 p.310 ~ p.317
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A study on the validity of reference points for edentulous patient
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Park Jeong-Jae
Kim Myung-Joo
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Abstract
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Purpose: The purpose of this study was to evaluate the validity of reference points for edentulous patient by examining the correlation of teeth and face, and intraoral anatomic landmarks.
Materials and methods: We examined a facial outline, length, bizygomatic width, nasion - gnathion length, glabella - nasion distance in 270 men and 280 women satisfied with inclusion criteria from Seoul National School of Dentistry. The shape of maxillary central incisor, mesiodistal crown width and length of maxillary 6 incisors, distance from incisive papilla to labial surface of maxillary central incisor, and perpendicular distance from incisive papilla to intercanine line were measured in the stone model. We analyzed the ratio and relevant relation statistically.
Results: The probability on having the same shape of face and the relative same shape maxillary incisor was 55.56% and 46.43% for men and women. The facial length proved to be a more valuable measurement in women in the tooth selection. The ratio of bizygomatic width to mesiodistal width of maxillary central incisor, and the ratio of bizygomatic width to width of maxillary 6 incisors were 16.8 : 1 and 3.0 : 1 and were positively correlated with each other. The distance of the canines from the maxillary incisal papilla was 1.33±1.28 mm. The distance between the center of the incisal papilla and the labial surface of their maxillary central incisor was 9.23±1.20 mm.
Conclusion: It was showed that anatomical reference points in tooth selection and arrangement for edentulous patient are useful and have validity in our limited study.
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KEYWORD
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Anatomic landmark, Facial outline, Clinical crown length & width, Correlation efficiency, Validity
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