[Remineralization of enamel promoted by casein phosphopeptide-amorphous calcium phosphate with different concentration of fluorin].

Purpose: To evaluate the effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) combined with different concentrations of fluoride on demineralization of enamel remineralization.

Methods: Extracted premolar teeth for orthodontic reason were immersed into lactic acid gel to prepare artificial white spot lesions. Then the specimens were randomly assigned to 3 groups: 5% CPP-ACP group as control, 5% CPP-ACP +500 mg/L F- group and 5% CPP-ACP +900 mg/L F- group, which were measured by micro-hardness tester.

[The change of calcitonin gene- related peptide in periodontal tissue during orthodontic tooth movement].

Purpose: To establish a Sprague-Dawley rat model of tooth movement, detect the expression of calcitonin gene-related peptide (calcitonin gene related peptide, CGRP) in Sprague-Dawley rats' periodontal tissues during tooth movement and explore the role of the peripheral mechanisms of pain in orthodontics.

Methods: 60 Sprague-Dawley rats were randomly divided into experimental group (n=54) and control group (n=6). Force was applied on right maxillary first molar in rats and the changes of CGRP expression were detected by real-time PCR 4 h, 8 h, 1 d, 3 d, 5 d, 7 d, 14 d after tooth movement.

[Assessment of cell proliferation during distraction osteogenesis of peridental ligament in rats].

Purpose: To establish an animal model of orthodontic rapid tooth movement through distraction osteogenesis of the periodontal ligament and assess the cell proliferation including osteoblasts, osteoclasts and bone cells.

Methods: Forty rats were randomly divided into experimental and orthodontic control group, and received BrdU injection at the beginning of distraction intraperiotoneally. Traditional orthodontic model was established in the control group.

[A study of oral health behaviors among 65 to 74 years old people in Shanxi province].

Purpose: To assess the oral health behaviors among 65 to 74 years old people in Shanxi province, and provide a base line for oral health service.

Methods: Four hundred and five old people aged from 65 to 74 in Shaanxi province was selected according to the Third National Oral Health Investigation Criteria and the oral health behaviors of them were investigated by questionnaire. SPSS 13.

[Expression of co-stimulatory molecules in peripheral blood of patients with idiopathic thrombocytopenic purpura in relation with platelet antibodies].

This study was aimed to detect the expression of co-stimulatory molecules CD80, CD86 and CD137 in peripheral blood of patients with idiopathic thrombocytopenic purpura (ITP), the content of platelet antibodies in serum (PAIgG), and to analyze the relationship between them and their correlation with the number of platelet in peripheral blood, so as to clarify the roles of co-stimulatory molecules in pathogenesis of idiopathic thrombocytopenic purpura and evaluation of disease status. The co-stimulatory molecules CD80, CD86 and CD137 in peripheral blood mononuclear cells (PBMNCs) of 48 ITP patients and 40 normal persons were detected by immunofluorescence and flow cytometry (FACS), PAIgG content in serum was detected by enzyme-linked immunosorbent assay (ELISA). The results showed that CD80, CD86 and CD137 expression levels in ITP patients were (4.

[The effect of continuously compressive press on the shape of cells and expressions of MMP-9,TRAP in human osteoclasts].

Purpose: To investigate the effect of continuously compressive pressure on the function of human osteoclasts.

Methods: Monocytes were collected from umbilical cord cells, and were cultured for 14 days. alpha-MEM which contains RANKL and M-CSF was used as the culture medium.

[A clinical retrospective study on modified parotidectomy in benign tumors of parotid gland].

Purpose: A clinical perspective study was designed for patients undergoing a modified parotidectomy to reduce complications of parotidectomy.

Methods: 110 patients were divided randomly into two groups; Group 1 (55 cases) was operated via routine surgical modality. Group 2(55 cases) was treated with preserving the fascia parotideomasseterica and great auricular nerve and partial parotidectomy.

[Effect of Erigeron Breviscapine on premaxillary suture distraction osteogenesis in rabbit].

Purpose: The aim of this study is to determine the effects of Erigeron Breviscapine (EB) in suture distraction osteogenesis (DO) in the maxillary protraction models of rabbit.

Methods: In distraction study, the rabbits were randomly divided into 2 groups based on protracted or unprotracted (n=16, 8 in each). The cephalograms were taken in the 0 and the 28th day.

Effects of ghrelin on feeding regulation and interdigestive migrating complex in rats.

Objective: Ghrelin is an orexigenic peptide with remarkable prokinetic effects. However, its mechanisms in regulating feeding and gastrointestinal migrating myoelectrical complex (MMC) are not fully understood. The aim of this study was to examine the effects of ghrelin on feeding regulation and duodenal motility in rats.