| ORIGINAL RESEARCH |
|
| Year : 2022 | Volume
: 13
| Issue : 3 | Page : 99-102 |
|
|
How Many Microwave Disinfection Cycles is Safe for the Adaptability of Polymethyl Methacrylate (PMMA) Denture Base Materials?: An In Vitro Study
Wan Nor Syariza Wan Ali1, Noor Farishahbanubinti Ahmad2, Sharifah Nor Aishah Syed Yussof2
1 Department of Conservative Dentistry and Prosthodontics, Universiti Sains Islam, Nilai, Negeri Sembilan, Malaysia
2 Ministry of Health, Putrajaya, Malaysia
Correspondence Address:
DDS Wan Nor Syariza Wan Ali
MClinDent (London), MPros RCS (Edin), Faculty of Dentistry, Universiti Sains Islam Malaysia, Tower B, Bangunan MPAJ, Pandan Indah, 55100 Kuala Lumpur
Malaysia
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/denthyp.denthyp_97_21
|
|
|
Introduction: We aimed to determine the maximum microwave disinfection cycles that is safe for the adaptability of polymethyl methacrylate (PMMA) denture bases under power–time setting of 630 W for 3 minutes. Materials and Methods: Thirty PMMA maxillary denture bases were constructed and divided into two groups, control (no disinfection) and test (microwave disinfection at 630W for 3 minutes in water immersion). Coltene Rapid Liner (Coltene/Whaledent AG, Altstatten, Switzerland) silicone was coated onto the internal surface of the samples followed by placement of 8 kgf of axial load. The silicone film was removed, and weighed using analytical balance. One day interval was given between each cycle and samples were stored in 37°C water bath. Tests were carried out until a statistically significant silicone film weight change detected. The data were analyzed on SPSS version 21.0 (IBM Corp, Armonk, NY). Results: Statistically significant change of the denture base was detected after the tenth cycle of microwave irradiation. Conclusion: The maximum microwave disinfection cycles that is safe for the adaptability of PMMA denture bases under power–time setting of 630 W for 3 minutes is only up to 10 cycles.
|
|
|
|
| [FULL TEXT] [PDF]* |
|
 |
|
