How to revise and utilise the cephalogram for craniofacial dysostosis--modification of the porion and the McNamara line

Journal of Cranio-maxillo-facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery
Ikkei TamadaTakenobu Ishii

Abstract

McNamara line analysis is often utilised in orthognathic surgery and is particularly useful in that it can easily express the extent of maxillo-mandibular deformity quantitatively. However, in craniofacial dysostosis (CFD), the location of the porion (PR) is sometimes displaced inferiorly. The McNamara line depends on the Frankfurt horizontal plane (FH plane), and hence, its deviation is often extremely distorted in CFD. The objective of this study was to enable more correct reflection of deformities of CFD patients on lateral cephalogram analysis. The lateral cephalograms of 152 Asian individuals were involved. angle basion(BA).orbitale(Or).PR, angle BA. nasion(NA).PR, and the distance from BA to PR on the BA-NA plane were measured and each standard range was established. Using these ranges, modified PR (mPR) is supposed to lie within a fairly small area. Second, we utilised mPR in the practice of McNamara line analysis in CFD patients. In both cases in the present study, it was confirmed that modified McNamara line analysis can express the deformities more precisely than conventinal analysis, as far as the maxillo-mandibular relationship is concerned. However, particularly in Case 2, both the cranio-maxillary and cranio-mandi...Continue Reading

References

Jun 1, 1976·American Journal of Orthodontics·R M RickettsL Bagha
Dec 1, 1984·American Journal of Orthodontics·J A McNamara
Jan 1, 1983·Scandinavian Journal of Plastic and Reconstructive Surgery·H FriedeB Johanson
Sep 1, 1981·Oral Surgery, Oral Medicine, and Oral Pathology·J DelaireJ F Tulasne
Oct 1, 1996·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·K MiyajimaT Iizuka
Mar 26, 2003·Plastic and Reconstructive Surgery·Richard J LangfordAnthony D Hockley
Jan 26, 2007·The Journal of Craniofacial Surgery·Sean BoutrosBarry H Grayson

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Citations

Sep 6, 2011·Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS·Hideo NakajimaKazuo Kishi
Jan 18, 2011·The Journal of Craniofacial Surgery·Giorgio IannettiFelice Festa
May 9, 2012·The Journal of Craniofacial Surgery·Felice FestaGiorgio Iannetti

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