In-Vitro Comparison of Mechanical and Physical Properties of Various Provisional Restoration Materials

Burduroğlu H. D., Keyf F.

ICP & EPA JOINT MEETING, Amsterdam, Netherlands, 4 - 07 September 2019, pp.145

  • Publication Type: Conference Paper / Full Text
  • City: Amsterdam
  • Country: Netherlands
  • Page Numbers: pp.145
  • Bezmialem Vakıf University Affiliated: Yes

Abstract

IN-VITRO COMPARISON OF MECHANICAL AND PHYSICAL

PROPERTIES OF VARIOUS PROVISIONAL RESTORATION MATERIALS

Burduroglu, Defne *, Keyf, Filiz

Bezmialem Vakif University, Faculty of Dentistry

Department of Prosthodontics

Istanbul, Turkey

Keywords: provisional restoration, color stability, flexural strength

Purpose/Aim: It is important for patient comfort and satisfaction that provisional restorations should not fracture, get deformed and

show discoloration while in use. In our study, 6 different provisional restoration materials were subjected to micro hardness test and

flexural test in order to measure mechanical strength, surface roughness test and discoloration tests in order to evaluate esthetics. With

the help of these tests, we searched for materials that are advantageous during clinic use.

Materials and Methods: Vita CAD-Temp and Ivoclar Telio-CAD blocks for CAD/CAM are used in our study. Other materials used in

our study are Revotek LC (UDMA), Protemp 4 (Bis-acryl), Dentalon Plus (PEMA) and Imident (PMMA). Samples for 3-point bending

test are manufactured with dimensions 2 x 2 x 25 mm according to ISO 4049 (n=15). Samples were loaded with a universal testing

machine until fracture occurred. For micro hardness, surface roughness and discoloration tests, disc shaped samples with 10 mm

diameter and 2 mm thickness were manufactured (n=15). Baseline color measurements were made after Vickers micro hardness and

surface roughness tests. As a coloring agent, coffee was chosen. All samples were immersed in coffee solution for 7 days. Second color

measurements were made. ?E values, which shows discoloration, were calculated. Statistical analysis of the data was made with SPSS

for Windows 11.5. Kruskal Wallis test was used in order to evaluate level of significance (p<0,05).

Results: Flexural strength values varied between 146 MPa and 63 MPa. The strongest groups were Imident and Protemp 4. Micro

hardness and surface roughness evaluation showed methacrylate resins are better than other groups. As color stability, PMMA groups

were found to discolor less than other groups. Revotek LC and Protemp 4 showed clinically unacceptable ?E values (?E>3.3).

Conclusions: Based on this study data, it is advised to use heat polymerized PMMA when long-term use is indicated.