Complete mandibular denture stability when posterior teeth are placed over a basal tissue incline.
Six patients with previous denture experience were provided with new dentures. Metal indicators were placed on either side of the mandibular denture and a cobalt-chromium alloy marker was inserted in the left bucco-posterior area of the mandible in each case. In the new dentures posterior teeth were positioned up to the retro-molar pad, over the basal tissue slope of the posterior mandibular alveolar ridge. After habituation had taken place, a cineradiographic recording was made of chewing. Prior to the second recording the mandibular teeth were removed to a point where the remaining teeth were not over inclined residual alveolar ridges. Denture movement was observed by measuring the distances between the markers on an analytical projector. The results show a significant difference between the cranial values of the two chewing experiences. Values for all denture movements were less after removal of the teeth over an incline. These results support the clinical observation that teeth placed over a basal tissue incline have a destabilizing effect during complete mandibular denture function.
Jooste
C H
CH
Department of Dental Prosthetics, Faculty of Dentistry, University of Stellenbosch, Republic of South Africa.
Thomas
C J
CJ
D000328:Adult; D002933:Cineradiography; D003768:Dental Occlusion, Centric; D003779:Denture Design; D003781:Denture Retention; D003826:Denture, Complete, Lower; D006801:Humans; D007574:Jaw Relation Record; D008409:Mastication / Q000502:physiology; D008875:Middle Aged; D014093:Tooth, Artificial