CLINICAL AND RADIOGRAPHIC STUDY OF TWO DIFFERENT DESIGNS FOR RESTORING UNILATERAL MANDIBULAR DISTAL EXTENSION BASES

Abstract

The present study was carried out to evaluate and compare two different designs for restoring unilateral mandibular distal extension (Kennedy class II). Twenty patients were selected to participate in the study, they had mandibular distal extension opposing natural teeth. All of the patients were free from systemic diseases that might influence the results. Also they had no previous prosthetic appliances. They were subjected to proper scaling, root planing and occlusal adjustment when necessary. The patients were randomly classified into two group. The first group (group A) had their RPDs containing:- The distal saddle, Ceka extracoronal attachment, lingual bar and double Aker claps. While the second (group B) had their RPDs containing:­ The distal saddle, RPI clasp, cingulum rest on both canines, lingual bar and double Aker clasp. The following investigations were carried out:- 1-Periodontal reaction of the abutments: a) Pocket depth (Ramt]ord 1967). b)Probing attachment level (Ramt]ord 1967). c)Gingival index (Loe and Silness 1963). 2-Bone changes at the abutments and the residual alveolar ridge usmg. a)Quantitaive digital subtraction radiography.