title: Effects of estrogen deficiency on microstructural changes in rat alveolar bone proper and periodontal ligament.
abstract: The present study aimed to analyze the effects of estrogen deficiency on buccal alveolar bone proper and the periodontal ligament in ovariectomized (OVX) rats, compared with rats that had been subjected to sham treatment. Morphological and histological changes in the periodontium were analyzed using micro‑computed tomography and paraffin sectioning. Sections were stained using hematoxylin and eosin, and tartrate‑resistant acid phosphatase. Expression of receptor activator of nuclear factor‑κB ligand (RANKL), dentin matrix protein 1 C‑terminal (DMP1‑C) and osteopontin (OPN) were analyzed using immunohistochemistry. Histomorphometric analysis of buccal alveolar bone proper samples revealed porotic changes and disorganized bone structure in OVX rats. Furthermore, bone mineral density and pore spacing were significantly lower in OVX rats compared with sham rats. Porosity was significantly higher in OVX rats compared with sham rats (P<0.01). A greater number of osteoclasts were observed along the margins of the buccal alveolar bone proper samples from OVX rats compared with those from the sham rats. Expression of OPN and RANKL was significantly higher, and that of DMP1‑C was significantly lower, in OVX rats compared with sham rats. Ovariectomy‑induced osteoporosis is capable of changing the structure of buccal alveolar bone proper and the periodontal ligament, which is likely to increase the risk of periodontal disease.
authors.affiliation: Sino‑Russian Institute of Hard Tissue Development and Regeneration, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.
authors.forename: Zhongshuang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Sino‑Russian Institute of Hard Tissue Development and Regeneration, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.
authors.forename: Lisha
authors.initials: L
authors.lastname: Liu
authors.affiliation: Sino‑Russian Institute of Hard Tissue Development and Regeneration, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.
authors.forename: Chen
authors.initials: C
authors.lastname: Kang
authors.affiliation: School of Stomatology, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Xie
authors.affiliation: Sino‑Russian Institute of Hard Tissue Development and Regeneration, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Sino‑Russian Institute of Hard Tissue Development and Regeneration, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
mesh_terms: D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000378:metabolism*; D000818:Animals; D015519:Bone Density; D004967:Estrogens / Q000172:deficiency*; D005260:Female; D006801:Humans; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology*; D015663:Osteoporosis, Postmenopausal / Q000000981:diagnostic imaging / Q000378:metabolism*; D010513:Periodontal Ligament / Q000378:metabolism / Q000473:pathology*; D017208:Rats, Wistar; D055114:X-Ray Microtomography
chemical_list: D004967:Estrogens