Software Designation to Assess the Proximity of Different Facial Anatomic Landmarks to Midlines of the Mouth and Face
Statement of Problem: Recognition and determination of facial and dental midline is important in dentistry. Currently, there are no verifiable guidelines that direct the choice of specific anatomic landmarks to determine the midline of the face or mouth. Objectives: The purpose of this study was...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Shiraz University of Medical Sciences
2014-12-01
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| Series: | Journal of Dental Biomaterial |
| Subjects: | |
| Online Access: | http://jdb.sums.ac.ir/index.php/jdb/article/viewFile/72/12 |
| Summary: | Statement of Problem: Recognition and determination of facial and dental midline
is important in dentistry. Currently, there are no verifiable guidelines that direct the
choice of specific anatomic landmarks to determine the midline of the face or mouth.
Objectives: The purpose of this study was to determine which of facial anatomic
landmarks is closest to the midline of the face as well as that of the mouth.
Materials and Methods: Frontal full-face digital images of 92 subjects (men and women
age range: 20-30 years) in smile were taken under standardized conditions; commonly
used anatomic landmarks, nasion, tip of the nose, and tip of the philtrum were digitized
on the images of subjects and aesthetic analyzer software used for midline analysis using
Esthetic Frame. Deviations from the midlines of the face and mouth were measured
for the 3 clinical landmarks; the existing dental midline was considered as the fourth
landmark. The entire process of midline analysis was done by a single observer and
repeated twice. Reliability analysis and 1-sample t- tests were conducted.
Results: The Intra-class correlation coefficients (ICCs) for reliability analysis of RFV
and RCV measures made two times revealed that the reliabilities were all acceptable.
The results indicated that each of the 4 landmarks deviated uniquely and significantly
(P<.001) from the midlines of the face as well as mouth in both males and females.
Conclusions: There was a significant difference between the mean ratios of the
chosen anatomic landmarks and the midlines of the face and mouth. The hierarchy
of anatomic landmarks closest to the midline of the face is: (1) midline of the
commissures, (2) nasion , (3) tip of philtrum,(4 )dental midline, and (5) tip ofthe nose.
The closest anatomic landmarks to the mouth midline are: (1) tip of philtrum, (2)
dental midline, (3) tip of nose, and (4) nasion. |
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| ISSN: | 2383-3971 2383-398X |