Original Article

Year : 2022 | Volume : 3 | Issue : 2 | Page : 44-57

Wear resistance patterns of milled PEEK and PMMA provisional restorations for dental implant prosthesis

Aswana Jayaprakash1 , Ashwini Sukanya2, Jayakrishna Kumar 3

1 Senior Lecturer, 3 Professor & HOD, Department of Prosthodontics and Implantology, Ragas Dental College and Hospitals, Chennai. 2 Senior Lecturer, Department of Prosthodontics, Madha Dental College and Hospitals, Chennai.

Address for Correspondence:

Dr. Aswana Jayaprakash,

Department of Prosthodontics and Implantology, Ragas Dental College and Hospitals, Chennai.

Email id: aswanajj1981@yahoo.co.in

Abstract

Aim & Objectives:

Aim of this in vitro study was to comparatively evaluate the wear resistance of two different materials used as provisional implant supported restorative Prosthesis.

Materials & Methods:

Twenty natural mandibular first premolar teeth were considered as antagonistic teeth specimens. Ten samples each of milled PMMA (GROUP I), milled PEEK (GROUP II) were designated as disc samples. The samples were subjected to wear tests in a pin-on-disc machine. Surface roughness, wear rate, was measured after wear testing. The results were statistically analyzed using paired t tests. SEM analysis was done for one representative tested sample from each test group.

Results:

Mean surface roughness (Ra) values before and after wear test for GROUPS I, II were 0.8276, 6.0214, 0.473 and 1.1948, respectively. Mean wear rates (mg/min) of GROUPS I & II were 0.00087, 0.0108 respectively. SEM analysis revealed prominently roughened surface for GROUP I, and smoother surface for GROUP II.

Conclusion:

Within the limitations of the study, milled PMMA exhibited significantly higher surface roughness both before and after wear test as compared to both milled PEEK which was corroborated by surface profilometry and SEM analysis. Milled PEEK exhibited a marginally smoother surface compared to Milled PMMA. Milled PMMA showed significantly higher wear as compared to milled PEEK indicative of least wear resistance.

 Keywords: Wear rate, surface roughness, CAD PMMA, CAD PEEK,SEM

Conflict of interest

The authors have nothing to disclose or any conflicts of interest.

Source of funding

None

How to Cite this article : Aswana Jayaprakash, Ashwini Sukanya, & Jayakrishna Kumar. (2022). Wear resistance patterns of milled PEEK and PMMA provisional restorations for dental implant prosthesis: Original Article. International Journal of Prosthodontic Rehabilitation, 3(2), 44–57. https://doi.org/10.56501/intjprosthorehab.v3i2.678