Prosthodontic principles endorse placement of artificial teeth in the muscular neutral zone rather than locating them on top of the residual ridge crest. ![]() In the patient who has experienced moderate to severe alveolar ridge resorption in both maxilla and mandible, a resultant skeletal Class III (prognathic appearance) relationship occurs. Maxillo-mandibular relationshipĪntero-posteriorly the maxilla resorbs in a superior and posterior direction, the mandible in an inferior and anterior direction. Loss of teeth in the mandible initiates a process of alveolar ridge resorption that differs from that in the maxilla. The mandible's lingual tilt leads to a gradual inferior and lateral shift of the ridge crest.
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