Gothic Arch Tracing Research Articles

Occlusion from rest position

1. The basic diagnosis for occlusion requires the location of the vertical dimension, centric relation, and horizontal rotation center of the mandible. 2. Rest position and position of maximum biting force coincide in vertical dimension. 3. The occlusion, muscle function, and temporomandibular joint must function in harmony. 4. Temporomandibular pain may be the result of abnormal pressure on the connective tissue in the glenoid fossae. 5. The maximum vertical dimension is the dimension at rest position or maximum force, minus 2 mm. 6. Patients should be conditioned for jaw registrations. 7. Treatment planning may be done after mounting the casts on an articulator and establishing the proposed intermaxillary relation. 8. Rest position is in the range of a normal hinge axis movement of the mandible. 9. Rest position is selected as the diagnostic position. The Gothic arch tracing may record abnormal conditions. The Gothic arch and rest position may be correlated by conditioning the patient.

The Scott system of precision articulation in three-dimensional occlusion

Summarizing, there are seven pieces of equipment for chair work, namely, (1) the face meter; (2) the face-bow; (3) the bite leveller; (4) the nose cuspid meter; (5) the Gothic arch tracer; (6) the sagittal marker, and (7) the rotary point finder; and three pieces of laboratory equipment, (1) the template; (2) the articulator, and (3) the milling machine. The technique embraces three-dimensional occlusion. The principle applied to registration of occlusion on the articulator is the mandibular movement, as in the human jaw. The cusp-type tooth is used. From the first examination to the delivery of the dentures, only three sittings are required. The system attacks the problem from the therapeutic standpoint by providing proper exercise of the oral structures by providing equalized pressure in point-to-point contacts of every tooth in the dental arch. The principle embodied in the process simulates the natural laws of the oral anatomy. It provides a masticating mechanism that moves absolutely free and frictionless at all points of cusp contact, anteriorly and posteriorly and in the alternate lateral strokes.