Reduction of the Fixed Prosthesis Occlusive Surface Considering the Patient’s Age
Aim of investigation is elaboration of the fixed prosthesis occlusive surface individual simulation method on a basis of the tooth occlusive surface age change study.
Materials and Methods. A three-dimensional contact scanner of the ″Roland DG Corporation″ firm, model ″PIX-4″ was used in work. A scanning of the upper and lower jaw diagnostic plaster model 60 pairs, received in humans of the different age groups with intact dental rows and orthognathic occlusion is made. A treatment of the received data and detection of the abrasion facet area and the lateral tooth tubercle clivus divergence angle sizes were accomplished with a use of a computer 3D-program ″Catia 5-14″. The age changes of the second tooth occlusive surface relief are studied. The received data of a physiologic abrasion was in a basis of the fixed prosthesis occlusive surface individual simulation method creation considering the patient’s age and prevailing side of chewing.
The received results of the masticatory muscle tonometry and the temporomandibular joint arthrotribography in patients with a partial loss of teeth prior and after treatment prove, that the fixed prosthesis occlusive surface individual simulation unlike a traditional method more effectively reduces the masticatory muscle contractile ability and tonic activity, and normalizes the temporomandibular joint arthrotribographic values and the masticatory muscle contractile activity asymmetry of the right and left sides.
A statistical reliability of the fixed prosthesis occlusive surface individual simulation proposed method effectiveness is confirmed by the Wilcoxon and Friedman tests.
