Vancomycin-laden calcium phosphate-calcium sulfate composite allows bone formation in a rat infection model

被引:30
|
作者
Boyle, K. Keely [1 ]
Sosa, Branden [2 ]
Osagie, Liza [3 ]
Turajane, Kathleen [2 ]
Bostrom, Mathias P. G. [2 ]
Yang, Xu [2 ]
机构
[1] Univ Buffalo, Buffalo, NY USA
[2] Hosp Special Surg, 535 E 70th St, New York, NY 10021 USA
[3] Royal Free Hosp, London, England
来源
PLOS ONE | 2019年 / 14卷 / 09期
关键词
LOCAL ANTIBIOTIC DELIVERY; GRAFT SUBSTITUTE; IN-VITRO; CHRONIC OSTEOMYELITIS; SURGICAL DEBRIDEMENT; DEFECTS; TOBRAMYCIN; MANAGEMENT; FRACTURES; PELLETS;
D O I
10.1371/journal.pone.0222034
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Objective Local antibiotic delivery systems with differing chemical and mechanical properties have been developed to assist in the management of osteomyelitis. We investigated the bone conductive and resorptive capabilities of a calcium phosphate-calcium sulfate (CaP/CaS) composite compared with commercially available polymethylmethacrylate (PMMA). In addition, we compared the in vivo preventative and treatment efficacies of both biomaterials in a proven osteomyelitis model. Methods Sixty-four, male Sprague-Dawley rats were inoculated with 10 mu l of 1.5 x 10(8) CFU/ml of Staphylococcus aureus in a surgically drilled defect in the right proximal tibia. Infected animals were randomly allocated into prevention and treatment groups with 32 rats each. In the prevention group, the defect was filled with a plug containing either PMMA or CaP/CaS immediately after the inoculation. In the treatment group, the infected defects were irrigated, debrided, and filled with either a PMMA or CaP/CaS plug. Both CaP/CaS and PMMA were impregnated with 10% weight of vancomycin. Rats were sacrificed 6 weeks after cement insertion. Infection was detected by bacterial culture and histological analysis. Bone formation in the defect was assessed with micro-computed tomography and histology. Results No bacteria were detected in any group. Both the prevention and treatment groups using CaP/CaS had significantly more bone volume fraction, bone area, and cartilage area than the PMMA groups. Conclusions When loaded with 10% of vancomycin, CaP/CaS and PMMA have the same efficacy for treatment and prevention of osteomyelitis. CaP/CaS enhances bone defect healing through improved bone remodeling in our osteomyelitis rat model.
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页数:12
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