Evaluation of the absorption of alveolar bone in different impression methods for repairment of Kennedy Class Ⅱ denture defect

Abstract

Objective To evaluate the absorption of alveolar bone in anatomic impression and functional impression technique in the repairment of Kennedy class Ⅱ denture defect by cone beam CT(CBCT). Methods 16 patients with mandibular Kennedy Class Ⅱ denture defect were randomly divided into the function group and the anatomical group (n = 8). The function group adopted the functional impression, the anatomical group used anatomic denture impression for denture making. Before denture wearing and after 6 months of normal use of denture, CBCT were used to measure the height of residual alveolar bone in the mesial and distal alveolar bone, and the height difference between the anterior and posterior teeth. Results After 6 months of denture wearing, the height difference of the mesial (n = 0.742, P 0.05). Conclusion The denture made by function impression can reduce the absorption of al⁃ veolar bone in the mesial and distal of terminal abutment teeth, while different impression methods don’ t have obvious influence on the absorption of residual alveolar bone during the short observation research term.

Keywords

• Functional impression
• Anatomic impression
• Abutment alveolar bone
• Residual alveolar bone
• CBCT