Shear Bond Strength of Three Adhesive Systems to Dentin: an in vitro Pilot Study
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Dental adhesives are used to achieve adequate adherence between restorative composite and dentin. They differ mainly in composition and application steps. The aim of this pilot study was a) to investigate if an UltraTester™ bond strength testing machine could be used to register shear bond strength of composite to dentin b) to estimate the number of specimens needed for testing adhesion to dentin and c) to examine if there are any significant differences associated with potential operator dependent errors. A total of sixty human premolars and molars that had been stored in antiseptic solution were divided between two operators. Ten specimens were used for each adhesive system for each operator. The specimens were immediately tested after application of the adhesive system and composite for shear bond strength. Expired composite was used in the test. Mean ± SD values: Two-step etch-and-rinse (Operator A: 16.7 ± 7.4 MPa, Operator B: 14.1 ± 6.1 MPa), one-step self-etch (A: 30.8 ± 7.5, B: 24.0 ± 11.9), three-step etch-and-rinse (A: 32.0 ± 5.0, B: 25.0 ± 7.6). There were statistically significant differences found between adhesives (p < 0.05) and operators (p < 0.05). In conclusion, this pilot study showed that an UltraTester shear bond strength testing machine is appropriate to measure shear bond strength. Ten specimens of each adhesive system seem to be adequate to get statistical significant differences between the registered shear bond strength values. The operators should practice prior to testing in order to minimize risk of damaging the specimens.
Place, publisher, year, edition, pages
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:umu:diva-113699OAI: oai:DiVA.org:umu-113699DiVA: diva2:889255
Ardlin, BeritFunegård Hellsing, Ulrika