| ORIGINAL ARTICLE |
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| Year : 2021 | Volume
: 13
| Issue : 6 | Page : 1003-1006 |
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Evaluation of effect of aluminum oxide on flexural strength and surface roughness of conventional heat-cure denture base resin
Madhu Ranjan1, Ujjal Chatterjee2, Arya Gupta1, Souvir Pandey1, Rohit Anand1, Mritunjay Keshri1
1 Department of Prosthodontics and Crown and Bridge, Hazaribag College of Dental Sciences and Hospital, Hazaribagh, Jharkhand, India
2 Department of Prosthodontics and Crown and Bridge, Buddha Institute of Dental Sciences and Hospital, Patna, Bihar, India
Correspondence Address:
Madhu Ranjan
Department of Prosthodontics and Crown and Bridge, Hazaribag College of Dental Sciences and Hospital, Hazaribagh, Jharkhand
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/jpbs.jpbs_216_21
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Purpose: Acrylic denture base tends to fracture frequently during their service due to poor strength. The surface roughness of denture base is a critical property because denture base with rough surface will cause accumulation of food particles ,thereby leading plaque retention . Microbes such as candida albicans are seen inhabitating the surface. Materials and Methods: Conventional heat cure denture base reins(DPI) and heat cure denture base resin with incorporation of 15wt% aluminium oxide was studied in two groups with 20 samples each. A mold of size 65 mm × 10 mm × 3 mm (ISO Standard) was obtained by investing brass rectangles. About forty specimens were prepared. Specimens were divided into two groups (n = 20) coded A and B. Group A was the control group (n = 20) without addition of aluminum oxide. Group B was the experimental group (n = 20) with addition of 15 wt % aluminum oxide. All the specimens were stored in distilled water for 14 days. The flexural strength was measured using a three-point bending test in a universal testing machine, and the surface roughness was measured using contact-type profilometer. Results: Incorporation of 15wt% aluminum oxide leads to a significant increase in flexural strength and surface roughness of conventional heat-cure denture base resin.
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