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. 2019 Sep 20;12(19):3073.
doi: 10.3390/ma12193073.

Seasoning Polymethyl Methacrylate (PMMA) Bone Cements with Incorrect Mix Ratio

Robert Karpiński  1 , Jakub Szabelski  2 , Jacek Maksymiuk  3
Affiliations

Seasoning Polymethyl Methacrylate (PMMA) Bone Cements with Incorrect Mix Ratio

Robert Karpiński et al. Materials (Basel). .

Abstract

Cemented joint prostheses are widely used in orthopaedic surgery; however, implants/bone bonds are known to be susceptible to aseptic loosening, particularly in the case of long-term performance. The exact mechanism of this failure is under constant examination. One of the critical factors to the final mechanical functionality of bone cement can be an incorrect mix ratio of a two-component material (powdered polymer and liquid monomer). It can result in the deterioration of the final mechanical strength properties. The paper presents the results from an experimental study on the effects of the deviation from the correct mix ratio on the moisture uptake and the compression strength of cement depending on the seasoning time in Ringer's solution. The results were subjected to statistical analysis and a mathematical model was developed.

Keywords: biodegradation; bone cement; compressive strength; mechanical properties.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Dependence between moisture absorption and seasoning time in Ringer’s solution of cement specimens prepared at different P/L ratio imbalances.
Figure 2
Figure 2
Compression strength after seasoning in Ringer’s solution of samples with an unbalanced mix ratio.
Figure 3
Figure 3
Compression strength after seasoning in Ringer’s solution of samples with an unbalanced mix ratio.
Figure 4
Figure 4
Specimen weight increase (moisture uptake) and corresponding compressive strength depending on seasoning time in Ringer’s solution.
Figure 5
Figure 5
Model of relations between mix ratio imbalance and seasoning time in Ringer’s solution to the average compressive strength of bone cement.
See this image and copyright information in PMC

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