الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This study was carried out to evaluate clinically and radiographically the use of short implants with different attachments for assisting partial overdenture for mandibular Kennedy class I cases. Materials and Methods: 14 partially edentulous patients with mandibular bilateral free end saddle opposed by almost dentulous intact maxilla with the first premolars were the main abutments. Two short dental implants (7 mm length and 5mm diameter) were inserted at the first molar areas to support a bilateral distal extension removable partial overdenture with lingual bar as major connector. According to attachment type patients are divided in two groups; • group A: Consists of 7 patients for whom removable partial overdenture was retained with ball and socket attachment to the implants and RPI clasp to the first premolar abutment teeth. • group B: Consists of 7 patients for whom removable partial overdenture was retained with locator attachment to the implants and RPI clasp to the first premolar abutment teeth. Clinical evaluation parameters include: gingival index, probing depth and mobility together with radiographic evaluation for alveolar bone loss around implants, abutments and residual ridge resorption at time of denture insertion, at 6 months, 12 months and 18 months. At the end of the study the data were collected, tabulated and statistically analyzed. Results: All the implants of the two groups were successfully osseointegrated. There was no statistically significance difference between the groups as regards to clinical evaluation (gingival index, probing depth and implant stability by PTVs (Periotest Values). However, radiographic evaluation by digital periapical and panoramic radiograph showed statistically significant difference between the two groups regarding the marginal bone loss around implant, abutment teeth and residual ridge resorption distal to the implant during the follow up period but there is no significant difference in residual ridge resorption mesial to the implant. Conclusion: Within the limitation of the results of this study, it could be concluded that: short dental implant are good choice in posterior mandibular resorbed ridge as it overcomes and limits the hazard of extensive surgical procedures as grafting, nerve lateralization and ridge augmentation. The group of the implant-supported partial overdenture restored with the locator attachment showed better effect on bone health around the placed dental implant and the main natural abutment as well as residual ridge when compared with the other group of the implant supported partial overdenture with the ball and socket attachment.