Title: Compressive Strength Characteristics of a Novel Interim Dental Restorative Material
Amer Tiba, NAMRU- SA
Jessica Roeber, USAF Dental Evaluation & Consultation Service (DECS)
Dorian Olivera (Presenter)
Wen Lien, USAF Dental Evaluation & Consultation Service (DECS)
Brittany Morris, USAF Dental Evaluation & Consultation Service (DECS)
John Simecek, NAMRU- SA
Objectives: Nearly fifty percent of dental emergencies among active duty service members are related to fractured teeth, lost dental restorations, and loose fixed dental prostheses. Often these dental emergencies cannot be treated with definitive dental restorations in a timely fashion and require temporary rehabilitative therapy using an interim restorative material. The objective of this study was to evaluate the time-dependent compressive strength (CS) of a novel interim dental restoration material (IDRM) compared to five commercially available IDRMs.
Methods: A novel IDRM was formulated and evaluated against the following commercially available temporary materials: (1) Fuji Triage® (GC America), (2) KetacTM Silver (3M/ESPE), (3) IRM® (Dentsply), (4) Telio CS Inlay (Ivoclar Vivadent), and (5) CavitTM(3M/ESPE). CS testing was performed according to the ISO-4049-2009 method on all materials. Ten cylindrical (6 mm X 4 mm) specimens of each material were fabricated according to manufacturer’s instruction, stored in deionized water and kept at 37 degree centigrade until the start of the test. Specimens were loaded until failure using Instron ELECTROPULSTM E 3000 with load cell 5000N and at a cross-head speed of 0.5 mm/min to determine the CS of all specimens. CS tests were performed at 24 hours. Differences between the test group and each independent group were tested using t-tests. Similar means were tested for differences using ANOVA. Significance was set at α=0.05.
Results: At 24 hours, IDRM CS values (171.7±11.7 MPa) were significantly higher than all other tested materials (p<0.0001). Fuji Triage®, KetacTM Silver, and Telio Inlay did not show significant differences in CS at 24 hours (p=0.1105). The 24 hour CS mean/standard deviation values for all materials evaluated are shown in table 1.
Conclusions: IDRM demonstrated the highest CS values among all interim materials tested. Future testing will evaluate CS at additional time points, as well as, other physical properties of the IDRM.