الفهرس 
Radiographic evaluationOnly 14 pages are availabe for public view
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Abstract
The use of dental implants can solve most of mandibular bilateral removable partial denture problems. Twelve partially edentulous patients with mandibular bilateral free end saddle opposed by almost dentulous intact maxilla with the first premolars were the main abutments. Two dental implants were inserted at the first molar areas to support a bilateral distal extension partial overdenture with lingual bar as major connector. According to clasp design patients are divided in two groups; group I: Consists of 6 patients for whom removable partial overdentures were retained with o-ring attachment to the implants and RPI clasp to the first premolar abutment teeth. group II: Consists of 6 patients for whom removable partial overdentures were retained with oring attachment to the implants and conventional Aker clasp to the abutment teeth. Clinical evaluation parameters include: gingival index, probing depth and mobility together with radiographic evaluation for alveolar bone loss around both implants and abutments using digora for windows software (DFW) were carried out immediately at insertion, three, six and nine months after insertion. After the first 3 months gingival index (GI) increased significantly in both groups within the physiological limit while at the end of ninth month after insertion, there were no statistically significant difference between two groups. Differences between two groups regarding mobility and alveolar bone loss around abutment teeth and around implants through all the study periods, there were no statistically significance difference between two groups.