Accuracy of maxillary repositioning in two-jaw surgery with conventional articulator model surgery versus virtual model surgery.
The purpose of this study was to compare the accuracy of maxillary repositioning using the recently introduced computerized virtual model surgery (VMS) with conventional articulator model surgery (AMS). Forty-two patients who had undergone bimaxillary surgery were investigated retrospectively in this study. The patients were divided into two groups: conventional AMS (n = 23) and VMS (n = 19) for intermediate splint fabrication in maxillary positioning. Planned surgical movements and actual postsurgical changes of the lateral and frontal cephalometric measurements were compared. Although variations from the planned surgical movements were relatively small, both methods had statistically significant errors in some of the linear measurements. Both groups had a similar range of errors. The overall absolute mean discrepancy between the planned and actual surgical movements for the linear measurements was 1.17 mm (0-3.6 mm) in AMS and 0.95 mm (0-3.2 mm) in VMS. Of the total measurements, measurements reflecting a surgical discrepancy of more than 2 mm or 2° comprised 12.0% of the cases in AMS and 7.9% in VMS. The surgical accuracy of maxillary positioning with VMS was comparable to conventional AMS. Because VMS has the definitive advantage of eliminating the complex laboratory step and shortening the laboratory time, this can be accepted as an alternative to AMS.
Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea. Electronic address: kwondk@knu.ac.kr.
T-G
TG
Kwon
Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
J-W
JW
Choi
Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
H-M
HM
Kyung
Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
H-S
HS
Park
D002508:Cephalometry; D003198:Computer Simulation; D003725:Dental Articulators; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D003765:Models, Dental; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D019340:Osteotomy, Le Fort; D059229:Osteotomy, Sagittal Split Ramus; D010347:Patient Care Planning; D011859:Radiography; D012189:Retrospective Studies; D055815:Young Adult
accuracy; articulator model surgery; maxillary osteotomy; virtual model surgery