Flexural strength OF MILLED PEEK BAR VERSUS PEKK BAR ON TOOTH SUPPORTED OVERDENTURES. IN VITRO STUDY

Document Type : Original Article

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prosthodontics department faculty of dentistry Cairo University

Abstract

Digital dentistry allowed for the introduction of high-performance polymers as an alternative for metals. The successful introduction of peek (Polyether ether ketone) in prosthodontics field has encouraged the researchers to try similar materials as Pekkton (polyether ketone ketone). This invitro study aimed to evaluate the flexure strength of the milled Pekkton tooth supported bar under an overdenture as an alternative for PEEK one. Methodology a mandibular stone cast with two prepared canines was duplicated into an acrylic one, the cast was then scanned for digital designing of tooth supported bar to be milled in to either PEEK (group A) or PEKKTON bars (group B) respectively. Universal testing machine was used to measure the flexure strength of both materials under 4- point beam load resembling forces presented during functions. Result: statistical analysis showed a significant difference between group A and group B, where group B showed better result and flexure resistance to bending over group A. conclusion: both materials showed an acceptable result to be used as bar attachment under tooth supported overdenture, more clinical trials are needed to allow for long term evaluation for both materials.

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Egyptian Dental Journal
Volume 70, Issue 1 - Serial Number 4
January (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)
January 2024
Pages 387-394

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