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Effect of Raloxifene Administration on Bone Response Around Implant in the Maxilla of Osteoporotic Rats.
Implant Dentistry 2019 April 13
OBJECTIVES: To determine the effect of raloxifene (RAL) on bone response around implants in the maxilla of osteoporotic rats.
MATERIALS AND METHODS: Forty-five female rats at 8 weeks-old were divided into 3 groups: (1) control group, sham-operated rats, (2) ovariectomized group (OVX), and (3) ovariectomized and raloxifene-administered group (RAL). Eight weeks after the ovariectomy, upper right molar was extracted and an implant was placed at 4 weeks post-extraction. The RAL group was administered with 1 mg/kg/d of raloxifene via gavage while the OVX group and the control group received saline only. Three rats in each group were sacrificed at 1, 4, 7, 14, and 28 days and histologic sections were evaluated by hematoxylin and eosin staining and micro-computerized tomography was taken.
RESULTS: The RAL group showed faster bone formation around the implant than the OVX group. At 4 weeks after implantation, newly formed bone close to implant threads was mature with considerable quantity of bone marrow in the RAL group.
CONCLUSION: Raloxifene showed increased bone formation around implant. This might have clinical implications in prosthetic restoration by dental implants for patients with poor bone quality.
MATERIALS AND METHODS: Forty-five female rats at 8 weeks-old were divided into 3 groups: (1) control group, sham-operated rats, (2) ovariectomized group (OVX), and (3) ovariectomized and raloxifene-administered group (RAL). Eight weeks after the ovariectomy, upper right molar was extracted and an implant was placed at 4 weeks post-extraction. The RAL group was administered with 1 mg/kg/d of raloxifene via gavage while the OVX group and the control group received saline only. Three rats in each group were sacrificed at 1, 4, 7, 14, and 28 days and histologic sections were evaluated by hematoxylin and eosin staining and micro-computerized tomography was taken.
RESULTS: The RAL group showed faster bone formation around the implant than the OVX group. At 4 weeks after implantation, newly formed bone close to implant threads was mature with considerable quantity of bone marrow in the RAL group.
CONCLUSION: Raloxifene showed increased bone formation around implant. This might have clinical implications in prosthetic restoration by dental implants for patients with poor bone quality.
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