A METHOD FOR DEFINITION OF DIFFERENT POSITIONS OF A MODEL OF THE LOWER JAW RELATIVELY TO A MODEL OF THE UPPER JAW AND A DEVICE FOR THE ACCOMPLISHMENT OF THE METHOD

摘要

PCT No. PCT/SE88/00563 Sec. 371 Date Jun. 22, 1989 Sec. 102(e) Date Jun. 22, 1989 PCT Filed Oct. 24, 1988 PCT Pub. No. WO89/03662 PCT Pub. Date May 5, 1989.Method for fixation of different positions of a model (2) of the mandible relatively to a model (1) of the maxilla of a patient. One of the models consists of two members (15, 16) namely a tooth member and a socket member unified along coinsiding joint surfaces forming a common boarder plane (19) in a predetermined mutual position. The method comprises impressions of the teeth of the mandible and maxilla respectively are made in an index (54) in the shape of a plastically deformable plate, partly in a thick plate and partly in a thin plate. The mandible and maxilla models (2) are positioned in an articulator (5) so that they coinside with the thick index. The thick index is replaced with the thin index, forming an interspace between the joint surfaces of the divided model. The interspace is cast by filling the space with a cast mass, obtaining a removable interlayer plate. The maxilla and the mandible models (1, 2) are fixed within the articulator in two positions, where one position is determined by the fact that the interlayer plate is positioned between the joint surfaces and the other position is determined by the fact that the joint surfaces contact each other without interlayer plate. The invention also relates to a device for the accomplishment of the method.