Effect of cavity preparation on the flexural strengths of acrylic resin repairs

Elhadiry, S.S.; Yunus, N.; Ariffin, Y.T. (2010) Effect of cavity preparation on the flexural strengths of acrylic resin repairs. Journal of Applied Oral Science, 18 (6). pp. 546-550. ISSN 1678-7757

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      Abstract

      Objective: To investigate the effect of cavity preparation on the flexural strength of head-curing denture resin when repaired with an auto-curing resin. Material and methods: Ninety-six rectangular specimens (64x10x2.5 mm) prepared from heat-curing denture base resin (Meliodent) were randomly divided into four groups before repair. One group was left intact as control. Each repair specimen was sectioned into two; one group was repaired using the conventional repair method (Group 1). Two groups had an additional transverse cavity (2x3.5x21.5 mm) prepared prior to the repair; one repaired with (Group 2) and one without glass-fiber reinforcement (Group 3). A three-point flexural bending test according to the ISO 1567:1999 specification(8) for denture base polymers was carried out on all groups after 1, 7 and 30 days of water immersion. Statistical analysis was carried out using two-way ANOVA, Kruskal Wallis and post-hoc Mann Whitney tests. Results: The highest flexural strength was observed in the control group. Control and conventional repairs group (Group 1) showed reduction in the flexural strength 30 days after water immersion. No significant change in the strength was observed for Groups 2 and 3 where the repair joints were similarly prepared with additional transverse cavity. Conclusion: Repaired specimens showed lower flexural strength values than intact heat-curing resin. Cavity preparation had no significant effect on the flexural strength of repair with water immersion.

      Item Type: Article
      Creators:
      1. Elhadiry, S.S.
      2. Yunus, N.
      3. Ariffin, Y.T.
      Journal or Publication Title: Journal of Applied Oral Science
      Additional Information: ISI Document Delivery No.: 718RM Times Cited: 0 Cited Reference Count: 30 Cited References: Anusavice KJ, 2003, PHILLIPS SCI DENT MA ARIMA T, 1995, J PROSTHET DENT, V73, P55, DOI 10.1016/S0022-3913(05)80273-2 BERGE M, 1983, ACTA ODONTOL SCAND, V41, P187 BEYLI MS, 1981, J PROSTHET DENT, V46, P238, DOI 10.1016/0022-3913(81)90206-7 DARBAR UR, 1994, BRIT DENT J, V176, P342, DOI 10.1038/sj.bdj.4808449 Ellakwa Ayman E, 2006, J Prosthodont, V15, P300, DOI 10.1111/j.1532-849X.2006.00131.x Goiato MC, 2009, GERODONTOLOGY, V26, P237, DOI 10.1111/j.1741-2358.2008.00261.x Ishigami K, 1993, J Nihon Univ Sch Dent, V35, P36 JOHNSTON EP, 1981, J PROSTHET DENT, V46, P478, DOI 10.1016/0022-3913(81)90232-8 Keyf F, 2000, INT DENT J, V50, P93 Kostoulas Ioannis, 2008, J Prosthodont, V17, P257, DOI 10.1111/j.1532-849X.2007.00276.x Kostoulas Ioannis E, 2008, Gen Dent, V56, P51 Leavitt Curry, 2007, J Oral Implantol, V33, P310, DOI 10.1563/1548-1336(2007)33310:MBSORI2.0.CO;2 Leong A, 1971, Aust Dent J, V16, P232 Lin CT, 2000, J ORAL REHABIL, V27, P190, DOI 10.1046/j.1365-2842.2000.00513.x Mariatos G, 2006, ACTA ODONTOL SCAND, V64, P244, DOI 10.1080/0016350600633318 Miettinen VM, 1997, J PROSTHET DENT, V77, P531, DOI 10.1016/S0022-3913(97)70147-1 Pfeiffer P, 2008, J PROSTHET DENT, V100, P292, DOI 10.1016/S0022-3913(08)60209-7 Polyzois GL, 2001, J PROSTHET DENT, V86, P613, DOI 10.1067/mpr.2001.120069 Rached RN, 2004, J PROSTHET DENT, V92, P79, DOI 10.1016/j.prosdent.2004.04.005 Rahal Juliana Saab, 2004, Braz Dent J, V15, P225 Stipho HD, 1998, J PROSTHET DENT, V79, P580, DOI 10.1016/S0022-3913(98)70180-5 STIPHO HD, 1987, J PROSTHET DENT, V58, P249, DOI 10.1016/0022-3913(87)90186-7 Takahashi Y, 1999, INT J PROSTHODONT, V12, P348 Vallittu PK, 2000, INT J PROSTHODONT, V13, P334 Vallittu P K, 1997, Quintessence Int, V28, P39 WARD JE, 1992, J PROSTHET DENT, V67, P815, DOI 10.1016/0022-3913(92)90591-W YONUS N, 2005, J ORAL REHABIL, V32, P65 Zappini G, 2003, J PROSTHET DENT, V90, P578, DOI 10.1016/j.prosdent.2003.09.008 Anonymous, 1999, 15671999 ISO Elhadiry, Safa Salim Yunus, Norsiah Ariffin, Yusnidar Tajul Univ sao paulo fac odontologia bauru Bauru-sp
      Uncontrolled Keywords: Denture repair Glass fibers reinforcement Cavity preparation Flexural strength denture base materials glass-fiber-reinforcement polymethyl methacrylate transverse strength fracture deflection microwave
      Subjects: R Medicine > RK Dentistry
      Divisions: Faculty of Dentistry > Dept of Conservative Dentistry
      Depositing User: Mr Ahmad Azwan Azman
      Date Deposited: 25 Oct 2012 10:23
      Last Modified: 25 Oct 2012 10:23
      URI: http://eprints.um.edu.my/id/eprint/3796

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