Читать книгу Fundamentals of Fixed Prosthodontics - James C. Kessler - Страница 50

After the maxillary cast has been accurately affixed to the articulator using a facebow, the mandibular cast must be oriented to the maxillary cast with equal exactitude to be able to diagnose the patient’s occlusion.^1,2 Centric relation records are used to replicate, on the articulator, the relationship between the maxillary and mandibular arches that exists when the condyles are in their most anterosuperior position in the glenoid fossae. Lateral interocclusal records are used to adjust the condylar guidance of the articulator. Then, it is possible to observe tooth relationships and identify deflective contacts and/or other occlusal discrepancies from the casts on the articulator. When this information has been gathered and assessed, a determination can be made as to what corrective measures, if any, will be performed on the occlusion.

A distinction must be made between mounting for diagnosis and mounting for treatment. The attachment of casts to an articulator for diagnosis will be done with the condyles in a centric relation position. When casts are articulated for restoration of a significant portion of the occlusion, it also may be done with the condyles in the centric relation position. However, the beginning operator usually restores only limited segments of the occlusion at one time. Mounting casts for restoration of only a small part of the occlusion generally is done with the teeth in a position of maximal intercuspation.