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KMID : 0361620080430060746
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Journal of the Korean Orthopaedic Association
2008 Volume.43 No. 6 p.746 ~ p.751
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Bonding Strength between Cement and an Implant according to the Cementing Time
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Cho Woo-Shin
Kim Byung-Kwan
Woo Je-Ho
Youm Yoon-Seok
Byeon Hwa-Kyo
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Abstract
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Purpose: The objective of this study was to compare the bonding strength between cement and an implant according to the cementing time.
Materials and Methods: The two types of cement used were CMWⓡ 1 and 3 (Depuy Ltd., Blackpool, UK). Plastic molds containing CMWⓡ 1 were pressed onto metal blocks at 2, 4, 5 or 6 minutes after mixing the cement, while molds containing CMWⓡ 3 were pressed onto blocks at 3, 5, 6 or 7 minutes after mixing the cement. Tensile strength was tested with using an Instron Model 8874 (Instron Corp., Canton, MA, USA). Tensile strengths were compared using the Kruskal-Wallis test and the Mann-Whitney U test.
Results: The strongest bonding strengths for the tensile load were at 2 minutes post-mixing for CMWⓡ 1, and at 3 minutes post-mixing for CMWⓡ 3. The strength rapidly decreased after 5 minutes for CMWⓡ 1 and after 6 minutes for CMWⓡ 3.
Conclusion: This study suggests that the risk of loosening between cement and an implant is likely to be minimized by the surgical technique that considers the bonding strength according to time.
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KEYWORD
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Bonding strength, Bone cement, Loosening, Arthroplasty
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