The chin is an anatomical structure of aesthetic and functional significance of muscle attachment of the lower lip in addition to a special resistance to the jaw. Chin malformations require surgical correction to find a workable balance during mastication and swallowing functions and on the other side to psychological stimuli. There are different techniques for these changes, however the extension has fewer resources at describing a new procedure that facilitates the sagittal type above corrections without resorting to bone graft. The greater part of aesthetic meaning in the face are determined by the anatomical structures that are prominent in the facial skeleton that is in order, the nose, cheeks, chin and mandibular angle, in profile the nose and chin are the most important aesthetic relievantes.
The vertical facial dimensions, either in front or in profile, extending from the forehead to the bottom of the chin to achieve a good balance, hence the importance of the chin can not be underestimated in any way. The chin is a mandibular apophysis whose development is determined genetically and has individual psychological meaning so that a prominent chin is most commonly associated with aggressive attitudes while the chin retruded or its links to poor passive and quiet. 42-25328543
The architecture of the jaw shows a particular design with two thick cortical contour and a central core region of varying density ossification. This structure is home to multiple muscle attachments and the depressor muscles of the lower lip (the beard Square, triangular tassel Meton and the lips), and depressants jaw (digastric and platysma). The outer surface appositional nature chin all the way around and trabeculation directed horizontally to the sides, confer a surface tension on the outside and pressure on the lingual surface to create an area of direct impact resistance. Orthognathic surgical procedures are aimed at balanced and adequate relocation of the upper and lower jaw including the chin, however, the particular value of this makes your position is determined individually and eventually the relocation should be in isolation for for balance of the jaw with a good masticatory system functional.
Besides a good position of the jaws and optimal occlusion, the functional relationship of soft tissues is achieved if they are in position that allows a proper lip seal in harmony with the other functions of the stomatognathic system. The chin can be classified according to their size and position of macro and microgenia; pro v retrogenia: levo and dextrogenia. The microgenia macrogenia and involve an increase or a decrease in all dimensions of the chin. Have described numerous surgical techniques for correction of various anomalies of the chin. Among the techniques can be mentioned, the transverse osteotomy is the traditional technique, the double osteotomy and sinfisotomía, and it can be taken forward, backward, up and down, right and left, but the procedures required for elongation of the chin bone grafts or implants which involves a major surgical procedure or use of an inert material that does not favor the functional activities of the lip tissue. The microgenia required by the conditions of vertical and anteroposterior lower volume of specific procedures for their correction. This article describes a new technique that allows the extension and advancement of the chin, simultaneously.