Early cementing does not increase debond energy of grit blasted interfaces
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UMass Chan Affiliations
Department of Orthopedics and Physical RehabilitationDocument Type
Journal ArticlePublication Date
2004-06-09Keywords
*Adhesiveness*Bone Cements
Cadaver
Cementation
Femur
Humans
Materials Testing
Orthopedics
Polymethyl Methacrylate
*Prosthesis Failure
Surface Properties
Tensile Strength
Orthopedics
Rehabilitation and Therapy
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Show full item recordAbstract
A fracture mechanics based approach was used to determine the debond energy or fracture toughness of the stem-cement interface for a variety of conditions. The goals of the study were to determine if early cementing of stems increased the debond energy of grit blasted stem-cement interfaces and if debond energy was dependent on mold type. Early (2 min) and late (6 min) times of cementation were considered for two different grit blasted surface finishes (16 and 60 grit, Ra=5.7 or 2.3 microm). Specimen fabrication was performed using a relatively simple, unconstrained rectangular mold and a mold that more closely simulated in vivo conditions. The rectangular mold was used with all components at room temperature whereas the in vivo simulated mold had a body that resembled the femoral canal in shape and was warmed to body temperature. Early cementing did not increase the debond energy using the in vivo simulated mold. Extensive porosity was found at the interface, and porosity had a strong negative effect on debond energy. When the simpler, rectangular mold was used, early cementing did result in higher debond energies, but few voids were found at the interface. It appears that porosity at the interface was the major factor affecting the debond energy. The results from this study do not support the concept that improved stem-cement interface strength can be obtained by application of the cement while it is in a low viscosity state.Source
J Orthop Res. 2004 Jul;22(4):822-7. Link to article on publisher's siteDOI
10.1016/j.orthres.2003.12.014Permanent Link to this Item
http://hdl.handle.net/20.500.14038/43055PubMed ID
15183440Related Resources
Link to Article in PubMedae974a485f413a2113503eed53cd6c53
10.1016/j.orthres.2003.12.014