J Korean Assoc Maxillofac Plast Reconstr Surg.  2006 May;28(3):254-261.

Orthognathic surgery using model repositioning instrument: a case report

  • 1Department of Orthodontics, Kangnung National University Dental Hospital 123, Chibyun-dong, Kangnung-city, Kangwon-do, 210-702, South Korea. korth@knusun.kangnung.ac.kr
  • 2Department of Oral and Maxillofacial Surgery, College of Dentistry, Kangnung National University, Kangnung-city, Kangwon-do, 210-702, South Korea.


Moderate to severe dentofacial deformities usually require combined orthodontic treatment and orthognathic surgery to obtain the most stable result with optimal function and facial esthetics. Accordingly, the orthodontist and oral maxillofacial surgeon must be able to exactly diagnose existing deformities, establish an appropriate treatment plan, and execute the recommended treatment. Especially, to obtain optimal result of the maxillary surgery, model surgery is essential. But, the preoperatively planned position of the maxillary dental arch often cannot be sufficiently achieved during actual surgery, and deviations in the sagittal and vertical dimensions are common. To achieve three dimensional repositioning of the maxilla exactly, several methods have been introduced so far. Recently Model Repositioning Instrument (MRI, SAM, Inc., Munchen, Germany), one of these methods, has been introduced and applied clinically, which is reported as accurate, effective and prompt method for three dimensional repositioning of the maxilla. This article describes an introduction and a clinical application of this MRI.


Orthognathic surgery; Model surgery; Model Repositioning Instrument(MRI)

MeSH Terms

Congenital Abnormalities
Dental Arch
Dentofacial Deformities
Magnetic Resonance Imaging
Orthognathic Surgery*
Vertical Dimension
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