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Titre du document / Document title

Prediction of mandibular autorotation. Discussion

Auteur(s) / Author(s)

NADJMI N. (1) ; MOMMAERTS M. Y. (1) ; ABELOOS J. V. S. (1) ; DE CLERCQ C. A. S. (1) ; SPERRY T. P. (Commentateur) (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Division of Maxillo-Facial Surgery, Department of Surgery, General Hospital St John, Bruges, BELGIQUE
(2) Department of Orthodontics, University of Illinois, Chicago, Illinois, ETATS-UNIS

Résumé / Abstract

Purpose: The purpose of this investigation was to test the hypothesis that the mandible rotates around the same point during maxillary impaction surgery as during initial jaw opening. This point, called the center of mandibular autorotation (CAR), could then be used to predict mandibular position and to decide whether only maxillary impaction would be needed to correct the occlusion and the facial profile. Patients and Methods: Preoperatively, two lateral cephalograms were obtained from a consecutive series of 20 patients who underwent maxillary impaction without concomitant mandibular ramus osteotomy. One cephalogram was taken with the mandible in centric relation using a wax bite wafer and another with a jaw opening of 10 mm using a fabricated acrylic bite block with the mandible manipulated to its most retruded position. The CAR was calculated before and after jaw opening using the Rouleaux method on the lower incisor and gonion point. A third lateral cephalogram was taken within 2 days postoperatively. The postoperative lower incisal point was then transferred to the first cephalogram using cranial base superimposition. Results: When the preoperative and postoperative distances between CAR and incisal point were compared, there was no significant difference between these distances, proving the hypothesis. Conclusions: The method used is a practical and precise way to determine the center of mandibular autorotation on an individual basis. The center of rotation during initial jaw opening is the same as during impaction surgery.

Revue / Journal Title

Journal of oral and maxillofacial surgery    ISSN  0278-2391   CODEN JOMSDA 

Source / Source

Congrès
Jubilee Congress of the European Association for Cranio-Maxillofacial Surgery, Zurich , SUISSE (09/1996)
Meeting of the Austrian Association of Oral and Maxillofacial Surgery No1, Schladming , AUTRICHE (01/1997)
1998, vol. 56, no11, pp. 1241-1248 (32 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, New York, NY, ETATS-UNIS  (1982) (Revue)

Mots-clés anglais / English Keywords

Osteotomy

;

Maxillary

;

Predictive factor

;

Rotation

;

Axis

;

Determination

;

Profile

;

Face

;

Prospective

;

Treatment

;

Prognosis

;

Human

;

Surgery

;

Mots-clés français / French Keywords

Ostéotomie

;

Maxillaire

;

Facteur prédictif

;

Rotation

;

Axe

;

Détermination

;

Profil

;

Face

;

Prospective

;

Traitement

;

Pronostic

;

Homme

;

Technique impaction

;

Chirurgie

;

Mots-clés espagnols / Spanish Keywords

Osteotomía

;

Maxilar

;

Factor predictivo

;

Rotación

;

Eje

;

Determinación

;

Perfil

;

Cara

;

Prospectiva

;

Tratamiento

;

Pronóstico

;

Hombre

;

Cirugía

;

Localisation / Location

INIST-CNRS, Cote INIST : 3005, 35400007142152.0030

Nº notice refdoc (ud4) : 1590114



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