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Jakobsen T, Bechtold JE, Søballe K, Jensen T, Vestermark MT, Baas J. Local delivery of zoledronate from a poly (d,l-lactide)-coating increases fixation of hydroxy-coated implants. J Orthop Res 2017; 35:974-979. [PMID: 26925986 PMCID: PMC6338069 DOI: 10.1002/jor.23219] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/23/2016] [Indexed: 02/04/2023]
Abstract
Initial secure implant fixation predicts long-term survival. Bisphosphonates are anti-resorptive agents. They have been shown to increase implant fixation. We investigated whether local delivery of zoledronate from a poly-d,l-lactide (PDLLA)-coating could improve fixation and osseointegration of hydroxy-apatite coated implants. Cylindrical hydroxy-apatite coated implants were bilaterally inserted press-fit into the proximal tibiae of 10 dogs. On one side the implant was coated with PDLLA containing zoledronate. The PDLLA coating was applied upon the hydroxy-apatite coating. We used the contralateral implant as control. This implant was not coated with a poly-d,l-lactide. Observation period was 12 weeks. We evaluated implant fixation with histomorphometry and biomechanical push-out test. Zoledronate resulted in an approximately threefold increase in all biomechanical parameters when comparing data with their respective controls. We found that zoledronate increased preservation of old lamellar bone and increased formation of new woven bone. This study indicates that local delivery of zoledronate from a PDDLA coating has the potential to increase implant fixation. Studies investigating different doses of zoledronate and longer follow-up are needed. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:974-979, 2017.
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Affiliation(s)
- Thomas Jakobsen
- Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK-8000 Aarhus C, Aarhus, Denmark
| | - Joan E Bechtold
- Orthopaedic Biomechanics Laboratory, Minneapolis Medical Research Foundation and University of Minnesota, Minneapolis, Minnesota
| | - Kjeld Søballe
- Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK-8000 Aarhus C, Aarhus, Denmark
| | - Thomas Jensen
- Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK-8000 Aarhus C, Aarhus, Denmark
| | - Marianne T Vestermark
- Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK-8000 Aarhus C, Aarhus, Denmark
| | - Jørgen Baas
- Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK-8000 Aarhus C, Aarhus, Denmark
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Jakobsen T, Bechtold JE, Søballe K, Jensen T, Greiner S, Vestermark MT, Baas J. Local delivery of zoledronate from a poly (D,L-lactide)-Coating increases fixation of press-fit implants. J Orthop Res 2016; 34:65-71. [PMID: 26177742 PMCID: PMC6326075 DOI: 10.1002/jor.22979] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Accepted: 07/08/2015] [Indexed: 02/04/2023]
Abstract
Early secure fixation of total joint replacements is crucial for long-term survival. Antiresorptive agents such as bisphosphonates have been shown to increase implant fixation. We investigated whether local delivery of zoledronate from poly-D, L-lactide (PDLLA)-coated implants could improve implant fixation and osseointegration. Experimental titanium implants were bilaterally inserted press-fit into the proximal tibiae of 10 dogs. On one side the implant was coated with PDLLA containing zoledronate. The contralateral implant was uncoated and used as control. Observation period was 12 weeks. Implant fixation was evaluated with histomorphometry and biomechanical push-out test. We found an approximately twofold increase in all biomechanical parameters when comparing data from the zoledronate group with their respective controls. Histomorphometry showed increased amount of preserved bone and increased bone formation around the zoledronate implants. This study indicates that local delivery of zoledronate from a PDDLA coating has the potential to increase implant fixation.
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Affiliation(s)
- Thomas Jakobsen
- Department of Orthopaedics, Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Joan E. Bechtold
- Orthopaedic Biomechanics Laboratory, Minneapolis Medical Research Foundation and University of Minnesota, Minneapolis, Minnesota
| | - Kjeld Søballe
- Department of Orthopaedics, Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Thomas Jensen
- Department of Orthopaedics, Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | | | - Marianne T. Vestermark
- Department of Orthopaedics, Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Jørgen Baas
- Department of Orthopaedics, Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
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