Hydroxyapatite-based composite for dental implants: Anin vivo removal torque experiment
✍ Scribed by Kong, Young-Min ;Kim, Dong-Hwan ;Kim, Hyoun-Ee ;Heo, Seong-Joo ;Koak, Jai-Young
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 1022 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0021-9304
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✦ Synopsis
Abstract
Screw‐shaped dental implants were fabricated from commercially pure Ti (c.p. Ti) and HA‐based composites. The HA‐based composites were fabricated by mixing HA with Al~2~O~3~‐coated ZrO~2~ powders. The mechanical properties of these composites were enhanced by a factor of 3. These were implanted into the rabbit tibiae and the removal torque to loosen the implants in vivo was measured in order to investigate the osteointegration. After a healing period of 6 weeks, the implants were retrieved with a torque gauge instrument. The HA‐based composite implants showed an almost 2‐times‐higher removal torque when compared to the Ti implants (ANOVA, p < 0.05), indicating excellent biocompatibility to bone. Thus, HA‐based composites had not only better mechanical properties but also similar bioactivity as HA itself. It is believed that a HA‐based composite is suitable for artificial dental implants. © 2002 Wiley Periodicals, Inc. J Biomed Mater Res (Appl Biomater) 63: 714–721, 2002