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Tropical Dental Journal - 1st Pan African international dental journal


Tropical Dental Journal



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Published in French in Tropical Dental Journal Volume 35 - March 2012 pages 27-36

Cephalometric determination of the occlusion plane : the Broadrick flag techniqueCephalometric determination of the occlusion plane : the Broadrick flag technique est évalué 1 étoiles par les abonnés Tropical Dental Journal Online

Article Open access

Authors : L. Ousehal, L. Lazrak, J. Marzak, A. Bennani - Morocco


Résumé

Basée sur le principe de la sphère de Monson, la technique du drapeau constitue un moyen relativement simple pour déterminer le plan d’occlusion, en utilisant un rayon fixe de 104 mm. La théorie de Monson a été pendant longtemps controversée.
Notre travail consiste en une étude clinique réalisée au CCTD de Casablanca, sur 31 cas complètement dentés en normocclusion. Son objectif est triple : calculer sur les téléradiographies de profil, les rayons anatomiques et géométriques servant à la construction de la courbe de SPEE, voir s’il y a concordance entre ces deux rayons et enfin les comparer à la valeur théorique de 104 mm.
A partir des résultats obtenus il semblerait que :

  • La valeur de 104 mm, ne peut pas être considérée comme une moyenne standard à utiliser pour déterminer la courbe d’occlusion, de même l’articulateur tel qu’il est conçu actuellement ne peut pas être utilisé chez tous les patients quelles que soient les valeurs de leurs rayons,
  • En l’absence de molaires, le rayon anatomique ne peut pas être utilisé à la place du rayon géométrique pour déterminer la courbe d’occlusion. Le décalage mesuré entre la courbe obtenue et le plan d’occlusion reste non négligeable, il peut atteindre 3 mm pour le rayon anatomique et 3,5 mm pour le rayon géométrique,
  • Chez l’édenté total, la détermination céphalométrique du plan d’occlusion, en se basant sur le rayon anatomique ou le rayon géométrique n’est pas possible.

Abstract
Cephalometric determination of the occlusion plane : the Broadrick flag technique

Based on the principle of the sphere of Monson, the Broadrick flag technique constitutes a relatively simple means to determine the plan of occlusion, by using a radius fixes of 104 mm. The theory of Monson was debated a long time.
Our work consists of a clinical study realized in the CCTD of Casablanca, on 31 completely toothed cases normocclusion. Its objective was triple: to calculate on the profile teleradiographies, the anatomical and geometrical rays used for the construction of SPEE curve, to see if there is concor-dance between these two rays and finally to compare them with the theoretical value of 104 mm.
From the obtained results it would seem that:

  • The 104 mm value, cannot be considered as a standard average to be used to determine the curve of occlusion, also the articulator such as it is designed currently cannot be used in all the patient’s about is the values of their rays.
  • In the absence of molars, the anatomical radius cannot be used in place of the geometrical radius to determine the curve of occlusion. The measured gap between the obtained curve and the plan of occlusion remains not insignificant, he can reach 3 mm for the anatomical radius and 3,5 mm for the geometrical radius.
  • In the total edentate, the cephalometric determination of occlusion plane, by basing itself on the anatomical radius or the geometrical radius is not possible.

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