Effect of TiF4, ZrF4, HfF4 and AmF on erosion and erosion/abrasion of enamel and dentin in situ

Wiegand, Annette; Hiestand, Barbara; Sener, Beatrice; Magalhães, Ana Carolina; Roos, Malgorzata; Attin, Thomas

doi:10.1016/j.archoralbio.2009.11.007

« Previous Next »Archives of Oral Biology
Volume 55, Issue 3 , Pages 223-228, March 2010

Effect of TiF₄, ZrF₄, HfF₄ and AmF on erosion and erosion/abrasion of enamel and dentin in situ

Annette Wiegand
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
- Corresponding author. Tel.: +41 44 6343412; fax: +41 44 6344308.
Barbara Hiestand
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
Beatrice Sener
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, Alameda Octávio Pinheiro Brisolla 9-75, USP, Bauru, SP, Brazil
Malgorzata Roos
- Biostatistics Unit, Institute of Social and Preventive Medicine, University of Zurich, Hirschengraben 84, 8001 Zurich, Switzerland
Thomas Attin
- Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland

Accepted 15 November 2009.

Abstract

Objective

This in situ study aimed to analyse the impact of different tetrafluorides (TiF₄, ZrF₄ and HfF₄) and AmF on erosion and erosion plus abrasion of enamel and dentin.

Design

Ten volunteers took part in this crossover and double-blind study performed in 8 phases of each 3 days. In each phase, 2 bovine enamel and 2 dentin specimens were fixed in intraoral appliances. One enamel and one dentin sample were pretreated once with TiF₄, ZrF₄, HfF₄ or AmF (all 0.5M F) for 60s, while the other samples remained unfluoridated and served as control. Then, all samples were subjected to either erosion only (4 times/day, 90s) or to erosion and abrasion (2 times/day, 30s/sample). Toothbrushing abrasion was performed 90min after the first and last erosion with an electrical toothbrush and fluoridated toothpaste at 1.2N. After 3 days, enamel and dentin loss was assessed by profilometry (μm) and analysed by repeated measures ANOVA and paired t-test (p<0.05).

Results

All fluoride solutions reduced enamel and dentin loss significantly compared to the controls. Generally, eroded samples showed less wear than eroded and abraded samples. The protective potential of the fluorides was not significantly different and was only slightly, but mostly not significantly, decreased by abrasion. The protective effect of the fluoride solutions was similar in enamel and dentin.