Biomedical Engineering Reference
In-Depth Information
TABLE 1.2 (Continued)
Hydroxyapatite Coating Produced Using Various Deposition Technologies
Technique
Thickness
Advantages
Disadvantages
References
Sol-gel
<1 µm
Can coat complex shapes; low
processing temperatures;
relatively inexpensive as coating is
very thin
Some processes require controlled
atmosphere processing; expensive
raw materials
Li, De Groot, and Kokubo 1996; Manso et
al. 2002; Liu, Yang, and Troczynski 2002;
Chai, Gross, and Ben-Nissan 1998
Electrophoretic
deposition
0.1-2.0 mm
Uniform coating thickness; rapid
deposition rates; can coat complex
substrates
Dificult to produce crack-free
coatings; requires high sintering
temperatures
Ducheyne et al. 1986; Han et al. 1999; Han
et al. 2001; Zhu, Kim, and Jeong 2001;
Agata De Sena et al. 2002; Ma, Wan, and
Peng 2003; Nie et al. 2001; Manso et al.
2000
Biomimetic coating
<30 µm
Low processing temperatures; can
form bone-like apatite; can coat
complex shapes; can incorporate
bone growth stimulating factors
Time-consuming; requires
replenishment and constant pH of
simulated body luid
Habibovic et al. 2002; Oliveira et al. 1999;
Li et al. 1992
Hot isostatic pressing
0.2-2.0 mm
Produces dense coatings
Cannot coat complex substrates;
high temperature required;
thermal expansion mismatch;
elastic property differences;
expensive; removal/interaction of
encapsulation material
Wie, Hero, and Solheim 1998
Source:
Ong et al. 2009, with kind permission from Springer Science + Business Media.
 
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