Relación céntrica: revisión de conceptos y técnicas para su registro. Parte II

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Abstract

La relación céntrica ha sido objeto de disparidad de criterios en la odontología durante más de un siglo. A lo largo de este trabajo, vamos a exponer diferentes métodos usados tanto para obtener el registro, como para comprobar su certeza y corroborar la posición condilar. Dado que no existe evidencia científica en el tema, en este trabajo, revisaremos los estudios experimentales que aparecen en la literatura. Los hemos divididos en dos partes, la primera relacionada con la definición de relación céntrica y la segunda parte relacionada con técnicas de registro, posición condilar y la discrepancia entre relación céntrica y oclusión céntrica.

Translated abstract

The centric relation has been controversial on dentistry during more of one century. Along of this work, we are going to expose different methods to recording as checking the accuracy and condilar position. Given that there aren’t scientific evidence, in this work, we review the researches publicated. We have divided them into two parts; the first is related with the definition of centric relation and the second part is related with recording techniques, condilar position and centric relation- centric occlusion discrepancy.

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Most cited references 50

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Clinical study of location and reproducibility of three mandibular positions in relation to body posture and muscle function.

A.P. Tripodakis, J.B. Smulow, N.R. Mehta … (1995)

Clinical studies have confirmed the adequate reproducibility of both centric occlusion and centric relation when used as reference positions during treatment; however, the reproducibility of the neuromuscular position has been found inadequate. This study evaluated the location and reproducibility of these three mandibular positions in relation to body posture, sitting and supine, and bilateral muscle activity before and after the insertion of a flat mandibular positioning device equilibrated to balance the muscle functions, as shown by two electromyography biofeedback instruments. Intraoral recordings were made in 11 young subjects with complete natural dentition. Acrylic resin clutches that supported a screw point in the maxillary arch and painted glass in the mandibular arch were used and positioned not to interfere with the occlusion. The distances of the screw scratch from two of the edges of the painted glass were used to measure the anteroposterior and mediolateral locations with a micrometer. The reproducibility was evaluated by measuring the scratch surface by measuring the weight of the print cutouts made from photographs of the scratches taken with a stereoscope. The location and reproducibility of centric occlusion and centric relation were not affected by body posture. A more precise posterior neuromuscular position was obtained in the supine position. The insertion of a mandibular positioning device did not affect centric occlusion but gave a more precise centric relation. Neuromuscular position became as precise as centric occlusion and was located anteroposteriorly between centric occlusion and centric relation.