학술논문
Medication-related osteonecrosis of the jaw using periodontitis-induced rat before tooth extraction
Document Type
Academic Journal
Source
BMC Oral Health. August 12, 2023, Vol. 23 Issue 1
Subject
Language
English
ISSN
1472-6831
Abstract
Author(s): Kyeong-Mee Park[sup.1], Jieun Cheong[sup.2], Nan-Sim Pang[sup.2], Kee-Deog Kim[sup.1], Jung-Seok Lee[sup.3] and Wonse Park[sup.1] Introduction Bisphosphonates (BP) are representative drugs affecting bone metabolism and are widely used in osteoporosis treatment. [...]
Objective This study aimed to investigate the occurrence of medication-related osteonecrosis of the jaw (MRONJ) after tooth extraction due to periodontitis in ovariectomized rats. Methods Twenty-four osteoporosis-induced rats were administered with zoledronic acid (ZA; ZA group) or saline (CONT group). In both groups, tooth extraction was performed after inducing periodontitis, and all animals were sacrificed 8-week after tooth extraction. Results Micro-CT of the tibia showed that the bone volume fraction, bone surface density, trabecular number, and bone mineral density were significantly higher in the ZA group than in the CONT group. Histologically, the proliferative zone on the growth plate was thicker in the ZA group than in the CONT group. Micro-CT of the extraction sites revealed that the bone volume fraction was significantly higher in the ZA group than in the CONT group. Radiologically, the ZA group showed partial healing and delayed healing. Histological analysis revealed normal bone healing status with completely healed epithelium in the extraction sites of the CONT group, whereas abnormal empty osteocytes in the necrotic bone and inflammatory infiltration were observed in the ZA group. Conclusion The incidence of MRONJ increased in the rats administered with ZA. Keywords: MRONJ, Bisphosphonate, Zoledronic acid, Periodontitis, Tooth extraction, Ovariectomy, Rat
Objective This study aimed to investigate the occurrence of medication-related osteonecrosis of the jaw (MRONJ) after tooth extraction due to periodontitis in ovariectomized rats. Methods Twenty-four osteoporosis-induced rats were administered with zoledronic acid (ZA; ZA group) or saline (CONT group). In both groups, tooth extraction was performed after inducing periodontitis, and all animals were sacrificed 8-week after tooth extraction. Results Micro-CT of the tibia showed that the bone volume fraction, bone surface density, trabecular number, and bone mineral density were significantly higher in the ZA group than in the CONT group. Histologically, the proliferative zone on the growth plate was thicker in the ZA group than in the CONT group. Micro-CT of the extraction sites revealed that the bone volume fraction was significantly higher in the ZA group than in the CONT group. Radiologically, the ZA group showed partial healing and delayed healing. Histological analysis revealed normal bone healing status with completely healed epithelium in the extraction sites of the CONT group, whereas abnormal empty osteocytes in the necrotic bone and inflammatory infiltration were observed in the ZA group. Conclusion The incidence of MRONJ increased in the rats administered with ZA. Keywords: MRONJ, Bisphosphonate, Zoledronic acid, Periodontitis, Tooth extraction, Ovariectomy, Rat