+1 (202) 780-3397
EFFECT OF TELESCOPIC CROWN, MAGNETIC ATTACHMENT AND RPI CLASP ON THE SUPPORTING STRUCTURES FOR LOWER KENNEDY CLASS I DENTURES
4th World Congress on DENTISTRY AND DENTAL MATERIALS
December 11-12, 2019 | Dubai, UAE
Maha Nagi Kamal, Rami Maher Ghali and Fatma El-Zahraa Awad
British University in Egypt, Egypt Ain Shams University, Egypt
Scientific Tracks Abstracts : J Clin Dentistry Oral Health
Abstract:
Aim of the study: The aim of this study was to evaluate and compare the effect of RPI clasp, telescopic crowns
and magnets as retainers for Kennedy class I partial dentures on the supporting structures using digital radiography.
Materials & Methods: Twenty one partially edentulous patients having Kennedy class I lower ridges with lower
first premolar as last abutment were selected according to certain criteria. According to the type of direct
retainer, patients were divided into three groups: group I, received removable partial dentures retained by RPI
clasp; group II: received removable partial dentures retained by telescopic crowns exhibiting a 6 degrees taper
angle and Group III: received removable partial dentures retained by magnetic attachments. Radiographic
evaluation was performed to evaluate bone height mesial and distal to the abutments and the crestal bone
height at specially marked points on the residual ridge by serial standardized periapical radiographs made by
long cone paralleling technique.
Results: There was a statistically significant decrease in crestal bone height around the abutments, telescopic
attachment retainer showed the statistically significantly highest crestal bone loss around the abutment, while
RPI clasp retainer showed statistically significantly lower crestal bone loss followed by the magnetic attachment
retainer that showed the lowest crestal bone loss. However, regarding the effect of different direct retainers
on the residual ridge, there was a statistically significant decrease in the residual ridge height. RPI clasp
retainer showed the statistically significantly highest amount of bone loss, however, there were no statistically
significant differences between amounts of bone loss in telescopic attachment retainer and magnetic attachment
retainer, both showed the lowest mean amounts.
Conclusion: RPI clasp retained partial dentures distributed more stresses on the residual ridge rather than
on the abutment teeth. While, using telescopic retained partial dentures distributed more stresses on the
abutment teeth rather than on the residual ridge. Finally using magnetic retained partial dentures distributed
stresses more or less equally among the abutment teeth and the residual ridge compared to the other direct
retainers.
Biography:
Maha Nagi Kamal has completed her PhD from Ain Shams University, Egypt. She works as Lecturer of removable prosthodontics at BUE.
E-mail: maha.kamal@bue.edu.eg
PDF HTML