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Development of a morphing technique for predicting the position and size of an artificial ear in hemifacial microsomia patients.
Int J Prosthodont. 2014 Sep-Oct; 27(5):451-7.IJ

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.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

25191888

Citation

Coward, Trevor J., et al. "Development of a Morphing Technique for Predicting the Position and Size of an Artificial Ear in Hemifacial Microsomia Patients." The International Journal of Prosthodontics, vol. 27, no. 5, 2014, pp. 451-7.
Coward TJ, Richards R, Scott BJ. Development of a morphing technique for predicting the position and size of an artificial ear in hemifacial microsomia patients. Int J Prosthodont. 2014;27(5):451-7.
Coward, T. J., Richards, R., & Scott, B. J. (2014). Development of a morphing technique for predicting the position and size of an artificial ear in hemifacial microsomia patients. The International Journal of Prosthodontics, 27(5), 451-7. https://doi.org/10.11607/ijp.3990
Coward TJ, Richards R, Scott BJ. Development of a Morphing Technique for Predicting the Position and Size of an Artificial Ear in Hemifacial Microsomia Patients. Int J Prosthodont. 2014 Sep-Oct;27(5):451-7. PubMed PMID: 25191888.
* Article titles in AMA citation format should be in sentence-case
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 -