The long-term in vivo behavior of polymethyl methacrylate bone cement in total hip arthroplasty

Figures & data

Summary of molecular weights for the retrieved cements

Sample no.	Implantation time (years)	Mw(g/mol)	Mn(g/mol)	PDI
1	7	209,737	66,412	3.16
2	7	199,478	68,608	2.91
3	7	220,660	74,217	2.97
4	10	187,296	67,205	2.79
5	10	208,271	64,416	3.23
6	10	217,552	71,617	3.04
7	13	176,996	63,839	2.77
8	13	196,600	67,618	2.91
9	14	192,056	70,209	2.74
10	16	211,157	66,509	3.17
11	21	216,827	62,554	3.47
12	25	203,630	62,005	3.28
13	26	192,270	61,753	3.11
14	30	212,962	66,750	3.19

Figure 1 A. Relationship between implantation period and molecular weight. B. Relationship between implantation period and PDI. C. Relationship between molecular weight and bending strength. D. Relationship between molecular weight and bending modulus.

Figure 2. FTIR spectrum of control CMW1 cement (A) and CMW1 cement retrieved 16 years (B) and 30 years (C) after implantation.

Figure 3. A. Relationship between implantation period and bending strength. B. Relationship between implantation period and bending modulus.

Figure 4. A. Relationship between implantation period and density. B. Relationship between density and bending strength. C. Relationship between density and bending modulus.

Figure 5. A. Relationship between implantation period and porosity. B. Relationship between density and porosity. C. Relationship between porosity and bending strength. D. Relationship between porosity and bending modulus.