Biological response to titanium implants coated with nanocrystals calcium phosphate or type 1 collagen in a dog model.
Clin Oral Implants Res
; 24(5): 475-83, 2013 May.
Article
en En
| MEDLINE
| ID: mdl-22276577
ABSTRACT
OBJECTIVE:
The current study aimed to evaluate the osteogenic potential of electrosprayed organic and non-organic surface coatings in a gap-implant model over 4 and 12 weeks of implantation into the dog mandible. MATERIAL ANDMETHODS:
Sixteen Beagle dogs received experimental titanium implants in the mandible 3 months after removal of left premolars (P2, P3 and P4). Three types of implants were installed in each animal non-coated implant, nano-CaP coated implant and implant with type 1 collagen coating. Both micro-CT and histomorphometry were used to evaluate peri-implant bone response after implantation periods of 4 and 12 weeks. The bone area percentage was assessed histomorphometrically in three different zones (inner 0-300 µm; middle 300-600 µm; and outer 600-1000 µm) around the implant surface. Bone-bridging of the gap was also calculated for each sample.RESULTS:
Four weeks after implantation, nano-CaP and collagen-coated implants showed significantly higher bone volume (BV) in the inner zone compared with non-coated implants (P < 0.05 and P < 0.01). After 12 weeks, histomorphometric analysis showed comparable amounts of BV between all experimental groups. Also, no significant difference was found in the BV, as measured using micro-CT, between the implant groups. Absolute bone ingrowth measurements were highest for collagen-coated implants, but these differences were not significant.CONCLUSION:
The obtained data failed to provide a consistent favourable effect on bone formation of the collagen coating over 3 months of implantation. It is concluded that the source of the collagen as well as the limited osseous environment overshadowed a possible effect of the applied implant surface modifications. Similarly, the tested nano-apatite surface coating did not improve peri-implant bone ingrowth into a gap-implant model.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Titanio
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Fosfatos de Calcio
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Implantes Dentales
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Oseointegración
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Materiales Biocompatibles Revestidos
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Colágeno Tipo I
Límite:
Animals
Idioma:
En
Año:
2013
Tipo del documento:
Article