Abstract
PURPOSE
People with hemifacial microsomia may be missing an ear on the affected side of the face. The principal aim of the study was to develop a morphing technique and to determine whether it could be used to appropriately position an artificial ear, as well as to give an indication of prosthesis size in comparison with the natural ear. Comparisons also were made between the artificial ears being worn by the patients with their natural ears.
MATERIALS AND METHODS
Data from stereophotogrammetry images of the faces of 10 people were converted into stereolithographic format. Anthropometric points on the face and ear of the unaffected side were plotted. By a process of scaling, the distance between facial landmarks on the unaffected side was estimated for the affected side so as to identify where the morphed ear would be positioned once generated.
RESULTS
Generally, the morphed ears appeared to be in acceptable positions. There was a statistically significant difference between the position of the morphed and natural ears (P = .011), as well as the artificial and natural ears (P = .001), but this was unlikely to have any clinical implications. There were no significant differences among the sizes of the natural, morphed, and artificial ears (P = .072).
CONCLUSIONS
Morphing appears to offer a more precise way of planning the positioning and construction of an artificial ear on patients with hemifacial microsomia than traditional methods. Differences in facial shape on either side of the face may impact on the process. This requires further study.
TY - JOUR
T1 - Development of a morphing technique for predicting the position and size of an artificial ear in hemifacial microsomia patients.
AU - Coward,Trevor J,
AU - Richards,Robin,
AU - Scott,Brendan J J,
PY - 2014/9/6/entrez
PY - 2014/9/6/pubmed
PY - 2014/11/8/medline
SP - 451
EP - 7
JF - The International journal of prosthodontics
JO - Int J Prosthodont
VL - 27
IS - 5
N2 - PURPOSE: People with hemifacial microsomia may be missing an ear on the affected side of the face. The principal aim of the study was to develop a morphing technique and to determine whether it could be used to appropriately position an artificial ear, as well as to give an indication of prosthesis size in comparison with the natural ear. Comparisons also were made between the artificial ears being worn by the patients with their natural ears. MATERIALS AND METHODS: Data from stereophotogrammetry images of the faces of 10 people were converted into stereolithographic format. Anthropometric points on the face and ear of the unaffected side were plotted. By a process of scaling, the distance between facial landmarks on the unaffected side was estimated for the affected side so as to identify where the morphed ear would be positioned once generated. RESULTS: Generally, the morphed ears appeared to be in acceptable positions. There was a statistically significant difference between the position of the morphed and natural ears (P = .011), as well as the artificial and natural ears (P = .001), but this was unlikely to have any clinical implications. There were no significant differences among the sizes of the natural, morphed, and artificial ears (P = .072). CONCLUSIONS: Morphing appears to offer a more precise way of planning the positioning and construction of an artificial ear on patients with hemifacial microsomia than traditional methods. Differences in facial shape on either side of the face may impact on the process. This requires further study.
SN - 0893-2174
UR - https://www.unboundmedicine.com/medline/citation/25191888/Development_of_a_morphing_technique_for_predicting_the_position_and_size_of_an_artificial_ear_in_hemifacial_microsomia_patients_
DB - PRIME
DP - Unbound Medicine
ER -
