The aim of this investigation was to determine the effect of static loading on the measured shear bond strength of steel attachments bonded to enamel. Sixty steel attachments were bond to extracted and prepared premolar teeth with Orthodontic Concise (3M St Paul, Minnesota, USA) and allowed to bench cure for 2 weeks. Half the specimens had 78 g weights suspended from the attachment, close to the bondline, prior to testing. The mean shear bond strenght for the statically loaded sample was 127 N and indicating that static loading prior to shear testing significantly increase shear bond strength.
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References
1.
AdamsR. D. and PeppiattN. A. (1973) Effect of Poisson's Ratio strains in adherends on stresses of an idealised lap joint, Journal of Strain Energy, 8, 134–139.
2.
AdamsR. D. and PeppiattN. A. (1974) Stress analysis of adhesive-bonded lap joints, Journal of Strain Analysis, 9, 185–196.
3.
AndersonG. P., BennettS. J. and Lawrence De VriesK. (1977) Analysis and testing of adhesive bonds, Academic Press, London.
4.
BarkmeierW. W., GwinnettA. J. and SchaferS. E. (1985) Effects of enamel etching time on bond strength and morphology, Journal of Clinical Orthodontics, 19, 36–38.
5.
BraemM., LambrechtsP., VanherleG. and DavidsonC. L. (1987) Stiffness increase during the setting of dental composite, Journal of Dental Research, 66, 1713–1716.
6.
BuonocoreM. G. (1955) A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces, Journal of Dental Research, 34, 849–853.
7.
DickinsonP. T. and PowersJ. M. (1980) Evaluation of fourteen direct bonding orthodontic base, American Journal of Orthodontics, 78, 630–639.
8.
EvansL. B. and PowersJ. M. (1985) Factors affecting in vitro bond strengths of no-mix orthodontic cements, American Journal of Orthodontics, 87, 508–512.
9.
FaustJ. B., GregoG. N., FanP. L. and PowersJ. M. (1978) Penetration coefficient, tensile strength, and bond strength of thirteen direct bonding orthodontic cements, American Journal of Orthodontics, 73, 512–525.
10.
IrelandA. J. and SherriffM. (1994) Use of an adhesive composite for the bonding of orthodontic brackets, European Journal of Orthodontics, 16, 27–34.
11.
JorgensenK. D. (1985) Fatigue and fracture mechanics of composite resins, posterior composite resin denial restorative materials. Denial Products Division 3M, St Paul, Minnesota, USA.
12.
KinamiH., SugimuraM., SakudaM., OkazakiM. and KimuraH. (1990) A new type of metal bracket for suppression of resin remaining in debonding, Dental Materials Journal, 9, 25–35.
13.
KinlochA. J. (1981) Developments in Adhesives—2, Development Series, Applied Science Publishers, London.
14.
KnollM., GwinnettA. J. and WolffM. S. (1986) Shear strength of brackets bonded to anterior and posterior teeth, American Journal of Orthodontics, 89, 476–479.
15.
LopezJ. I. (1980) Retentive shear strengths of various bonding attachment bases, American Journal of Orthodontics, 77, 669–678.
16.
McCabeJ. F. (1992) Setting reactions of dental materials: methods of monitoring the rate of set, Proceedings of a Symposium: Setting Mechanisms of Dental Materials
17.
NewmanG. V. (1964) Bonding plastic orthodontic attachments to tooth enamel. Journal of the New Jersey State Dental Society, 36, 346–358.
18.
ReliefD. H. (1978) The mechanical bond, International Dental Journal, 28, 18–27.
19.
ReynoldsI. R. and von FraunhoferJ. A. (1976) Direct bonding of orthodontic attachments to teeth. The relation of the adhesive bond strength to gauze mesh size, British Journal of Orthodontics, 3, 91–95.
20.
Van NoortR., NorooziS., HowardI. C. and CardewG. (1989) A critique of bond strength measurements, Journal of Dentistry, 17, 61–67.
