Biomechanical evaluation of the interfacial strength of a chemically modified sandblasted and acid-etched titanium surface
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Author (Corporation)
Publication date
06.2006
Typ of student thesis
Course of study
Type
01A - Journal article
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Parent work
Journal of Biomedical Materials Research Part A
Special issue
DOI of the original publication
Link
Series
Series number
Volume
78A
Issue / Number
2
Pages / Duration
291 - 297
Patent number
Publisher / Publishing institution
Wiley
Place of publication / Event location
Edition
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Abstract
The functional capacity of osseointegrated dental implants to bear load is largely dependent on the quality of the interface between the bone and implant. Sandblasted and acid-etched (SLA) surfaces have been previously shown to enhance bone apposition. In this study, the SLA has been compared with a chemically modified SLA (modSLA) surface. The increased wettability of the modSLA surface in a protein solution was verified by dynamic contact angle analysis. Using a well-established animal model with a splitmouth experimental design, implant removal torque testing was performed to determine the biomechanical properties of the bone-implant interface. All implants had an identical cylindrical shape with a standard thread configuration. Removal torque testing was performed after 2, 4, and 8 weeks of bone healing (n = 9 animals per healing period, three implants per surface type per animal) to evaluate the interfacial shear strength of each surface type. Results showed that the modSLA surface was more effective in enhancing the interfacial shear strength of implants in comparison with the conventional SLA surface during early stages of bone healing. Removal torque values of the modSLA-surfaced implants were 8-21% higher than those of the SLA implants (p = 0.003). The mean removal torque values for the modSLA implants were 1.485 N m at 2 weeks, 1.709 N m at 4 weeks, and 1.345 N m at 8 weeks; and correspondingly, 1.231 N m, 1.585 N m, and 1.143 N m for the SLA implants. The bone-implant interfacial stiffness calculated from the torque-rotation curve was on average 9-14% higher for the modSLA implants when compared with the SLA implants (p = 0.038). It can be concluded that the modSLA surface achieves a better bone anchorage during early stages of bone healing than the SLA surface; chemical modification of the standard SLA surface likely enhances bone apposition and this has a beneficial effect on the interfacial shear strength.
Keywords
Biomechanical testing, Dental implant, Interface, Osseointegration, Surface chemistry, Wettability
Subject (DDC)
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ISBN
ISSN
1552-4965
1549-3296
1549-3296
Language
English
Created during FHNW affiliation
No
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Closed
License
Citation
Ferguson, S. J., Broggini, N., Wieland, M., de Wild, M., Rupp, F., Geis-Gerstorfer, J., Cochran, D. L., & Buser, D. (2006). Biomechanical evaluation of the interfacial strength of a chemically modified sandblasted and acid-etched titanium surface. Journal of Biomedical Materials Research Part A, 78A(2), 291–297. https://doi.org/10.1002/jbm.a.30678