Evaluation of Strain on Mandibular Molars Restored with Peek Endocrown -Experimental Study

Abstract

Context :Endocrowns are increasingly used as a restorative option for endodontically treated teeth, offering a conservative and esthetic alternative to traditional crowns. Polyetheretherketone (PEEK) has emerged as a promising biomaterial due to its favorable mechanical properties and biocompatibility. Understanding stress distribution is crucial for the longevity of such restorations. The aim of this study was to assess the stress distribution in mandibular molars restored with polyetheretherketone (PEEK) endocrowns.

Materials and Methods:

A total of 10 patients were selected for the study, which was conducted in the Department of Prosthodontics, Thai Moogambikai Dental College and Hospital, Chennai. Strain was measured using a strainmeter on the day of insertion, at one week, one month, six months, and one year.

Results:

The mean strain distribution was found to be highest one week after insertion (245.4 ± 5.68), followed by the day of insertion (236.70 ± 4.94). A gradual decrease in strain was observed over time, with values recorded at one month (190.0 ± 5.81), six months (134.80 ± 9.35), and one year (108.10 ± 5.08). Statistically significant differences were observed between several time intervals: one year and the day of insertion (p = 0.000*), six months and the day of insertion (p = 0.005*), one month and one week (p = 0.005*), six months and one week (p = 0.000*), one year and one week (p = 0.000*), and one year and one month (p = 0.005*).

Conclusion:
The study concluded that mandibular molars restored with PEEK endocrowns exhibited a reduction in strain over time.