Arbitrary Adjustment of Occlusion Rims

| April 22, 2012 | 0 Comments

Arbitrary Adjustment of Occlusion Rims

This arbitrary adjustment provides a ‘starting point’ for adjustments and should be fairly rapid. It should normally not take longer than 15 minutes per arch.
1. Maxillary Occlusion Rim Adjustment
– The maxillary wax rim should be slightly facial to the ridge to compensate esthetically for facial resorption of the bone
– Anterior height should be 1-2 mm below the lip when the patient slightly smiles
– The rim should touch the wet line of the lower lip, when the “F” or “V” sounds are spoken (have the patient count from 50 to 60)
– The nasolabial angle should be approximately 90°, and the lips should be unstrained, with the vermilion border showing
– The anterior-posterior orientation of the occlusal plane should be parallel to the alatragus line (Fox plane)
– The mediolateral orientation of the occlusal plane should be parallel to the pupils
2. Mandibular Occlusion Rim Adjustment:
– The mandibular wax rim should be centered over the middle of the ridge to maximize stability, which is usually compromised in the mandible
– The posterior height of the wax rim should intersect with a point l/2 – 2/3 up the retromolar pad
– The anterior height of the wax rim should be even with the corners of the mouth when the lip is relaxed
– The maxillary wax rim should have 1-2 mm horizontal overjet anteriorly and posteriorly when the patient is in a centric position
-The patient should demonstrate unstrained lips, with the vermilion border showing

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Category: Prosthodontics, WIKI

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