title: Influence of implant surface topography on primary stability in a standardized osteoporosis rabbit model study.
abstract: Evaluating primary stability is important to predict the prognosis of dental implant treatment. Primary stability is decreased in a low bone density site such as osteoporosis. However, it is difficult to apply in small animal and the effect of the different implant surface topography for the primary stability at low bone density site has not yet fully been investigated. The purpose of the present study was to evaluate the influence of implant surface topography on primary stability in a standardized osteoporosis animal model. Six rabbits underwent ovariectomy and administrated glucocorticoid to induce an osteoporosis model. Sham-operations were performed in additional six rabbits. Implants with machined or oxidized-surfaces were inserted into the femur epiphyses and insertion torque (IT) and implant stability quotient (ISQ) were measured. In sham model, the IT and ISQ did not differ significantly between the both implant. However, the IT value of oxidized-surface implant was significantly higher than that of the machined implant in the osteoporosis model. Meanwhile, ISQ did not significantly differ between the machined and oxidized-surfaced implants. In conclusion, the IT of implants is higher with rough than with smooth surfaces but that there are no differences in ISQ value between different surfaces in a standardized osteoporosis bone reduced rabbit model.
authors: Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. hiroshi-o@hiroshima-u.ac.jp.
authors: Hiroshi
authors: H
authors: Oue
authors: Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. kazuya17@hiroshima-u.ac.jp.
authors: Kazuya
authors: K
authors: Doi
authors: Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. yos-oki14@hiroshima-u.ac.jp.
authors: Yoshifumi
authors: Y
authors: Oki
authors: Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. yusuke0318@hiroshima-u.ac.jp.
authors: Yusuke
authors: Y
authors: Makihara
authors: Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. kubocky@hiroshima-u.ac.jp.
authors: Takayasu
authors: T
authors: Kubo
authors: Department of Medical, Oral and Biotechnological Sciences, Chieti-Pescara University, Chieti-Via dei Vestini, 31, Chieti 66100, Italy. v.perrotti@unich.it.
authors: Vittoria
authors: V
authors: Perrotti
authors: Department of Medical, Oral and Biotechnological Sciences, Chieti-Pescara University, Chieti-Via dei Vestini, 31, Chieti 66100, Italy. apiattelli@unich.it.
authors: Adriano
authors: A
authors: Piattelli
authors: Department of Prosthetic Dentistry School of Dentistry, Ohu University, 31-1 sankakudo, Kooriyama, Fukushima 963-8611, Japan. akagawa@den.ohu-u.ac.jp.
authors: Yasumasa
authors: Y
authors: Akagawa
authors: Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. tsuga@hiroshima-u.ac.jp.
authors: Kazuhiro
authors: K
authors: Tsuga