Читать книгу Fundamentals of Fixed Prosthodontics - James C. Kessler - Страница 59

The patient is guided into a CRCP closure, and the position of the mandibular midline in relation to the maxillary teeth is visually noted. The points on the maxillary teeth that would be opposite the mandibular midline if the patient moves the mandible 5.0 mm in both a right and left lateral excursion are measured and marked with a pencil (Fig 4-23). With a hand on the patient’s chin, the dentist asks the patient to open slightly. The dentist then guides the mandible approximately 5.0 mm to the right and closes it until the teeth lightly touch. The dentist explains that this procedure will be repeated with some wax between the teeth and that the patient should bite down carefully until told to stop.

Fig 4-25 The lateral interocclusal record has been trimmed before use.

A slightly warmed wax wafer (Surgident Coprwax Bite Wafer, Heraeus Kulzer) is placed against the maxillary teeth approximately 4.0 mm to the right of center. Using one hand to support the wax, the dentist guides the mandible to the right. The closure practiced previously is repeated until the teeth make indentations in the wax approximately 1.0 mm deep (Fig 4-24). The wax wafer is cooled with compressed air, removed from the mouth, and placed in a plaster bowl of cold tap water. The steps are repeated with a second wax wafer on the left side. After the wax wafer has cooled, a sharp laboratory knife is used to carefully cut off any of the wax that extends distal to the marginal ridge of the most posterior mandibular tooth on both sides of the wafer (Fig 4-25). This ensures that the wax wafer will completely seat on the mandibular cast when the articulator condylar inclination is set. The bite registrations are then rinsed with a hospital-grade disinfectant and placed in an unsealed sterilization bag until ready to be used.