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ORIGINAL ARTICLE
Year : 2019  |  Volume : 16  |  Issue : 4  |  Page : 189-196

Evaluation of bilateral mandibular distal extension implant supported overdenture retained by two clasp assemblies


Department of Prosthodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt

Correspondence Address:
Reda F. Radwan
Department of Prosthodontics, Faculty of Dentistry, Tanta University, Tanta
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/tdj.tdj_10_19

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Purpose Clinically evaluate the effect of clasp design on tissue health around abutment teeth and implants assisting mandibular bilateral distal extension removable partial overdenture. M&M: 12 partially edentulous patients with mandibular bilateral free end saddle opposed by almost dentulous intact maxilla with the first premolars. 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: six 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: six patients for whom removable partial overdentures were retained with O-ring attachment to the implants and conventional Aker clasp to the abutment teeth. Clinical evaluation Gingival index, probing depth and teeth mobility together with radiographic evaluation for alveolar bone loss around both implants and abutments using Digora for Windows were carried out immediately at insertion, 3, 6, and 9 months after insertion. Results After the first 3 months gingival index and probing depth increased significantly in both groups within the physiological limit while at the end of ninth month after insertion, no statistically significant difference between two groups. Differences between two groups regarding mobility and alveolar bone loss around abutment teeth through all the study periods, there is no statistically significance difference between the two groups. Regarding mobility and alveolar bone loss around implants through all the study periods, there is no statistically significant difference between results. Conclusion Presence of bilateral posterior implants reduce most problems of mandibular Kennedy class I such as preservation of abutment teeth, reduction of alveolar bone loss around the abutments and reduction the problems of rigid (Aker) clasp.


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