In Vitro Wear of Nano‐Composite Denture Teeth
- 10 December 2004
- journal article
- research article
- Published by Wiley in Journal of Prosthodontics
- Vol. 13 (4), 238-243
- https://doi.org/10.1111/j.1532-849x.2004.04043.x
Abstract
Few laboratory tests have been able to substantiate and quantify the wear resistances of polymeric denture teeth. This study evaluated the relative wear resistance of several types of denture teeth using an in vitro wear testing device. Four different types of denture teeth [nano-filled (Veracia) and micro-filled composites (SR-Orthosit, Endura, Duradent, Surpass), cross-linked acrylic (SR-Postaris, Genios-P, Creapearl, Vitapan Physiodens, Premium 8, Integral), and a conventional acrylic (Biotone)] were used. The flattened buccal surface of each denture tooth was subjected to the evaluation of Knoop hardness (n=5) and localized wear for 100,000 cycles (n=10). Wear values were determined in micrometers using a profilometer. The data for the hardness, wear depth, and worn surface areas were individually analyzed by one-way ANOVA. Knoop hardness values (KHN) ranged from 28.2 to 29.8 for micro-filled composite, 18.9 to 21.6 for cross-linked acrylic, 22.7 for nano-composite, and 18.6 for conventional acrylic teeth. All micro-filled composite teeth were significantly harder than other teeth (p <0.0001). The wear depth values were 90.5 microm for the nano-composite, 69.8 to 93.0 microm for the micro-filled composite, 80.8 to 104.0 microm for the cross-linked acrylic, and 162.5 microm for conventional acrylic teeth. The worn surface areas were 5.1 mm2 for the nano-composite, 2.6 to 3.6 mm2 for the micro-filled composite, 4.4 to 5.7 mm2 for the cross-linked acrylic, and 10.1 mm2 for conventional acrylic teeth. The wear values of the acrylic control were significantly different from all other denture teeth (p <0.001). The nano-composite tooth was harder and more wear resistant than the acrylic teeth but not significantly different from most of the cross-linked and micro-filled composite teeth tested.Keywords
This publication has 22 references indexed in Scilit:
- Shock absorbability of various restorative materials used on implantsJournal of Oral Rehabilitation, 1999
- An in vitro investigation of the wear of enamel on porcelain and gold in salivaThe Journal of Prosthetic Dentistry, 1996
- Pre-Clinical Screening for Wear of Posterior Compositc ResirisJournal of Esthetic and Restorative Dentistry, 1996
- Wear of Denture Teeth by Use of Metal Plates. Part 2: Abrasive Wear of Posterior Teeth.The Journal of Nihon University School of Dentistry, 1992
- Wear of Denture Teeth by Use of Metal Plates. Part 3: Abrasive Wear of Posterior Teeth and Wear of Opposing Metal Plates.The Journal of Nihon University School of Dentistry, 1992
- Impact resistance of highly crosslinked plastic denture teethJournal of Biomedical Materials Research, 1990
- Adhesive bonding of denture base resins to plastic denture teethJournal of Biomedical Materials Research, 1990
- Wear of artificial denture teeth by use of toothbrushes. Part 1: abrasive wear of anterior teeth.The Journal of Nihon University School of Dentistry, 1990
- Wear mechanisms of resin and porcelain denture teethActa Odontologica Scandinavica, 1989
- Wear characteristics of high-strength denture teethThe Journal of Prosthetic Dentistry, 1988