J Korean Assoc Oral Maxillofac Surg.  2008 Jun;34(3):306-318.

The bone formation around anodic oxidized titanium implants in the tinbiae of ovarectomized rats

• Park SH
• Jung SY
• Lee JY
• Kim GC
• Shin SH

Abstract

Anodic spark deposition method(ASD) surface treated titanium implant possesses a considerable osteoconductive potential that promoting a high level of implant osseointegration in normal bone. The purpose of this study was to observe the ASD implant's osseointegration in the osteoporosis-induced animal model. Twenty four rats, 10 weeks of age, were ovarectomized and 5 weeks later divided into two groups : ASD implant group and control implant group. Titanium screw implants (diameter; 2.0 mm, length, 3.5 mm; pitch-height, 0.4 mm) were designed for this study. Experimental implants were ASD treated and no treatment on control implants. ASD implants and control implants were placed in to left tibiae of rats. The rats were sacrificed at different time interval(1, 2, 4 and 8 weeks after implantation) for histopathologic observation and immunohisto -chemistrical observation, with collagen type I, fibronectin, integrin alpha2beta1 and integrin alpha5beta1 antibodies. The results obtained from this study were as follow: 1. Histopathologic findings, overall tissue response and the pattern of bone formation in both groups were similar. In ASD group, more newly formed bone was seen at 1 week and 2weeks than control group. 2. The levels of type I collagen and fibronectin expression were the most abundant at 2weeks and decreased gradually in both groups. Fibronectin and type I collagen expression in ASD group were stronger than control group but no significance. 3. The levels of integrin alpha2beta1 and Integrin alpha5beta1 expression were most abundant at 2 weeks and decreased gradually in both groups. No significant difference was observed in both groups. From this results, anodic oxidized titanium implants were more advantages in early stage of bone formation than control group, but have no significance in tissue responses and late bone formations. It could be stated that although anodic oxidized titanium implant possesses considerable osteoconductive potential but in osteoporotic bone condition dental implant procedure should performed after improving or treating the osteoporotic bone condition.

Keyword

Anodic oxidation(anodization); Osteoporosis; Bone healing; Dental implants

MeSH Terms

Animals
Antibodies
Collagen Type I
Dental Implants
Fibronectins
Implants, Experimental
Integrin alpha2beta1
Integrin alpha5beta1
Models, Animal
Osseointegration
Osteogenesis
Osteoporosis
Rats
Tibia
Titanium
Antibodies
Collagen Type I
Dental Implants
Fibronectins
Integrin alpha2beta1
Integrin alpha5beta1
Titanium