engleski

Alveolar bone changes in removable partial denture wearers dependent on the Kennedy classification

Alveolar bone density changes during the life span. Abutment teeth and the bone around them carry additional load from the lost teeth. The clasp and occlusal rests transfers occlusal forces from them to abutment teeth and their periodontal structures. These can load to increased and decreased alveolar bone density depending on the direction of the forces. Aims: The aim of this study is to assess alveolar bone density changes in removable partial denture wearers dependent on the Kennedy classification. Methods: 50 patients of both genders carriers of RPD were X-rayed twice in period of 3 month for standard retroalveolar radiograph. For calibration on each radiographs copper wedges of different thickness (0, 1-0, 5mm) were used. The radiographs were digitized and the gray levels translated into copper wedges thickness equivalents on 7 regions of interest (ROI) according the Knezović- Zlatarić method. The same ROI were positioned arround abutment teeth on the alveolar bone in both radiographs and the difference were analysed by one way variance test. Results: In the analysed sample 54% was Kennedy class I, 24% was Kennedy class II. Kennedy class III was present in18% of patients carried the RPD, and Kennedy class IV was present in only 4%. There was no statistical difference in the alveolar bone changes dependent on the Kennedy classification (p› 0, 05). Conclusions: The correct planning and axial direction of the transfered forces on abutment teeth, periodontal ligament and alveolar bone did not disraped the physiological balance of bone aposition and resorption resulting in mainted alveolar bone density in the analysed period regardless of the Kennedy classification.

bone density ; partial dentures

nije evidentirano