Evaluation of fixation of expandable implants in the mandibles of ovariectomized sheep
| Autor: | Jianrui Xiao, Su-Min Guan, Yu-xuan Chen, Shu-jun Chen, Liang Kong, Dehua Li |
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| Rok vydání: | 2012 |
| Předmět: |
Dental Stress Analysis
X-ray microtomography Bone density Ovariectomy Dentistry Mandible Osseointegration Dental Prosthesis Retention Fixation (surgical) Bone Density Medicine Animals Sheep Domestic Dental Implants business.industry Dental Implantation Endosseous X-Ray Microtomography Implant stability quotient Resonance frequency analysis Otorhinolaryngology Dental Prosthesis Design Ovariectomized rat Computer-Aided Design Osteoporosis Surgery Female Implant Oral Surgery business |
| Zdroj: | Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons. 71(4) |
| ISSN: | 1531-5053 |
| Popis: | This study aimed to investigate the effects of an expandable implant (EI) in ovariectomized sheep.The EI and taper implant (control group) were produced and placed in mandibles of ovariectomized sheep. Twelve weeks after implantation, resonance frequency analysis, biomechanical tests, histomorphometry, and micro-computed tomography were applied to detect the osseointegration in the 2 groups.The implant stability quotient values, maximal pullout forces, and bone-implant contact (BIC) were 60.3 ± 7.9, 511.0 ± 18.7 N, and 53.14% ± 4.56%, respectively, in the EI group and 58.3 ± 8.9, 394.5 ± 54.5 N, and 46.85% ± 5.04%, respectively, in the control group. There was no significant difference between the 2 groups in implant stability quotient values (P.05); however, in the EI group the maximal pullout force and BIC were increased significantly (P.05 and P.01, respectively). Micro-computed tomography analysis showed that the bone volume/total volume ratio and trabecular number increased significantly (P.01) and trabecular separation decreased significantly (P.05) in the EI group.EI could improve osseointegration in osteoporosis after 12 weeks of implantation by increasing BIC around the implant and by supplying an extra osseointegration surface. |
| Databáze: | OpenAIRE |
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