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Table 1 VCM concentrations (mean ± SD) and minimum VCM bioactivities

From: Double-layered antibiotic-loaded cement spacer as a novel alternative for managing periprosthetic joint infection: an in vitro study

 

Day

1

3

7

14

28

56

84

D-L spacer

(μg/mL)

VCM concentration

measured by HPLC

1415.3

(± 346.9)

175.6

(± 76.2)

152.8

(± 45.2)

109.3

(± 29.3)

59.5

(± 16.1)

29.4

(± 10.8)

22.6

(± 7.3)

Minimum

VCM bioactivity

> 320

160

160

80

40

20

20

PMMA spacer

(μg/mL)

VCM concentration

measured by HPLC

1580.1

(± 1312.9)

179.5

(± 81.1)

66.1

(± 45.5)

19.4

(± 10.3)

8.5

(± 4.6)

3.1

(± 1.2)

1.9

(± 0.7)

Minimum

VCM bioactivity

> 320

160

40

10

2.5

0

0

  1. Bioactivity was converted to concentration (μg/mL) by multiplying the MIC by the smallest eluent dilution rate that prevented the inhibition of MRSA growth. The values obtained by high-performance liquid chromatography (HPLC) and the broth microdilution method showed very similar values and patterns