COMPARSION OF AMOUNT OF MARGINAL RIDGE REDUCTION FOR REST SEAT PREPARATION BY THREE TYPES OF CLINICIANS

Abstract

Objective: The aim of this study was to compare the marginal reduction of a rest seat prepared for a cast chromium cobalt removable partial denture by three groups of clinicians (house surgeons, trainees and consultants.

Material and Methods: Thirty five clinicians divided into three groups; Group A having 15 house surgeons, group B contained 15 FCPS residents and group C having 5 consultants were the participants. The mandibular molars and premolars were prepared for removable partial denture. Only those teeth which were sound having no occlusal caries and no severe tipping to the edentulous spaces was included. Patients with limited mouth opening were excluded from the study. After completion of preparation impression was taken in alginate material, poured in dental stone (Dentamerica) and intercuspation wax bite (Cavex modeling) was registered. Thickness of wax in marginal area of rest was measured in millimeter using Iwanson’s gauge (Japan).

Results: Both the house surgeons and trainees prepared the mandibular molars and premolar less than ideal. The comparison for amount of marginal ridge reduction of molars and premolars by clinicians shows that the difference was significant (P<0.05). The mean marginal ridge reduction for premolars was 0.9±0.17 mm by house surgeons, 1.15±0.18 mm by FCPS residents and 1.34±0.114 mm was by consultants.

Conclusions: The experience has an important role in reducing marginal ridge. While preparing marginal ridge area for removable partial denture, it is of paramount importance to measure and achieve adequate preparation for fabricating successful removable partial denture.