Flip-registration procedure of three-dimensional laser surface scanning images on quantitative evaluation of facial asymmetries.
The aim of the study was to find a proper method that may evaluate the severity of facial asymmetry quickly and accessibly in clinics.


METHODS
The three-dimensional image data of facial asymmetry patients were collected with three-dimensional laser surface scanning, and the desired therapy outcomes were simulated in computers by flip-registration procedure. The discrepancy between desired results and initial images was calculated automatically, and a colored hypsography was printed. A questionnaire was given to both the patient and the craniofacial surgeon to examine the symmetry, accessibility, achievability, and helpfulness of these outcomes.


RESULTS
The three-dimensional image data offered by laser surface scanning were accurate and convenient. The desired results were reliable and acceptable to the patients. The colored hypsography was clear and accessible and achieved high appreciations from the surgeons.


CONCLUSIONS
Three-dimensional laser surface scanning together with flip registration procedure can evaluate the severity of facial asymmetry quickly, quantitatively, and effectively with an achievable outcome. It is welcomed by the craniofacial surgeons and has a great potential in clinic application.
Yu
Zheyuan
Z
Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiaotong University Medical School, Shanghai, China.
Mu
Xiongzheng
X
Feng
Shengzhi
S
Han
Jiayi
J
Chang
Tisheng
T
D002508:Cephalometry / Q000379:methods; D002648:Child; D003198:Computer Simulation; D005146:Facial Asymmetry / Q000175:diagnosis*; D005150:Facial Hemiatrophy / Q000175:diagnosis; D005151:Facial Injuries / Q000175:diagnosis; D005153:Facial Neoplasms / Q000601:surgery; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007834:Lasers; D008297:Male; D015903:Moire Topography / Q000379:methods; D010342:Patient Acceptance of Health Care; D010347:Patient Care Planning; D010781:Photography / Q000379:methods; D013515:Surgery, Oral; D011795:Surveys and Questionnaires; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult