[Evaluation of dental and craniofacial characteristics in patients with mild skeletal facial asymmetry].

Purpose: The purpose of this study was to investigate the dental and craniofacial morphological characteristics in patients with mild skeletal facial asymmetry, and to investigate the relationship between mild skeletal facial asymmetry and dental anomalies.

Methods: Thirty patients with mild skeletal facial asymmetry (experimental group) and 30 patients with normal faces (control group) were selected. All patients were scanned by cone-beam computed tomography (CBCT) and X-ray machine, Winceph software was used to measure the posteroanterior cephalometric radiographs, NNT software was used to measure the CBCT data.

[Expression of SOCS-1 and SOCS-3 in chronic periapical lesions and its clinical significance].

Purpose: To detect the expression of suppressor of cytokine signaling-1 (SOCS-1) and suppressor of cytokine signaling-3 (SOCS-3) in chronic periapical lesions and to clarify their roles in pathogenesis of apical periodontitis.

Methods: A total of 25 chronic periapical lesion tissues and 16 normal periodontal ligament tissues were collected respectively. The expression of mRNA was measured by real-time PCR, the protein expression was measured by immunohistochemical analysis.

[The impact of S.gordonii on P. gingivalis on the form of biofilm].

Purpose: To investigate the impact of S.gordonii on the ultrastructure of P. gingivalis biofilm and on the amount of P.

[The relationship between labial-lingual inclination and the thickness of the alveolar bone in the mandibular central incisors assessed with cone-beam computed tomography].

Purpose: To investigate the alveolar bone thickness of mandibular central incisors with different labial-lingual inclinations by cone-beam computed tomography (CBCT).

Methods: CBCT and lateral cephalometric images of 60 patients were chosen. The data was respectively classified into 3 groups by L1-MP: lingual inclination group (L1-MP<85.

[A clinical retrospective analysis of dental implants replaced in previously failed sites].

Purpose: To evaluate the clinical outcomes as well as related factors of dental implants replaced in previously failed sites.

Methods: A total of 12 patients (15 implants) who received replacement in previously failed sites during January 2005 to December 2011 were included. Outcomes of redo-implants were collected and clinical data was recorded and analyzed regarding risk factors related to redo-implants' survival using SPSS13.

[Comparison of expression of transforming growth factor-β1 in rat dental pulp during direct pulp capping with 2 capping agents].

Purpose: To examine and compare the expression of transforming growth factor-β1(TGF-β1) in rat dental pulp after direct pulp capping with calcium hydroxide (CH) and mineral trioxide aggregate (MTA).

Methods: The model of direct dental pulp capping after first molars was established in 28 female Wistar rats with CH and MTA. The rats were sacrificed 1, 3, 5, 7, 14,21 and 28 days after direct pulp capping.

[The effect of fluoride on the metabolism of teeth and bone in rats].

Purpose: To investigate the effect of fluoride on the metabolism of teeth and bone in rats, and to probe the mechanism of pathogenesis of dental fluorosis.

Methods: A total of 48 Wistar rats were randomly and equally divided into 4 groups including control group (distilled water), low-dose group(NaF,50 mg/L), medium-dose group (NaF,100 mg/L) and high-dose group (NaF, 150 mg/L). After 8 weeks, the rats were sacrificed under anesthesia, and serums were collected.

[The relationship between maxillary anterior impacted teeth and sagittal facial type].

Purpose: To investigate the relationship between impaction of maxillary anterior teeth and sagittal facial type and evaluate the dentofacial morphological characteristics of patients with maxillary teeth impaction.

Methods: Totally 90 patients with maxillary anterior teeth impaction were divided into 3 groups (one incisor impaction, one canine impaction and two canines impaction), and their cephalometric films were measured and analyzed. They were further divided into Class I, II and III facial types according to ANB and the constituent ratio were calculated.

[Perforator vascular anatomy and clinical application of the anteromedial thigh flap for head and neck reconstruction].

Purpose: A clinical study was undertaken to define the vascular anatomy of anteromedial thigh perforator flap (AMT) and evaluate the outcomes of the flap in head and neck reconstruction.

Methods: The sizable perforators of AMT flaps and their origins were prospectively explored in 54 patients. For each patient, we recorded the sizable perforators' location, diameter, source vessel, numbers and anatomical types.

[Effect of different surface managements on micro-tensile bond strength of non -carious sclerotic dentin to resin].

Purpose: To evaluate the micro-tensile bond strength of 3 different surface managements to non-carious sclerotic dentin.

Methods: Fifteen periodontal patients' occlusal wearing molars which were above 3rd degree were selected. The teeth were equally cut into two pieces along the buccolingual direction, and each piece was randomly divided into 3 groups.

[Study of the effect of chitosan and its composites on proliferation and differentiation of mouse osteoblasts].

Purpose: A mouse osteoblast cell line, MC3T3-E1, was cultivated in the medium that contained chitosan, type I collagen and recombinant human bone morphogenetic protein-2 in vitro to evaluate the effect of chitosan and its composites on proliferation and differentiation of mouse osteoblasts.

Methods: This study was categorized into 4 groups based on the medium used. Group A: α-MEM medium; group B: CS, type I collagen and α-MEM medium; group C: CS, type I collagen, rhBMP-2 and α-MEM medium.

[Investigation of dental manpower in non-public dental institutions in Liaoning province].

Purpose: To investigate the non-public oral medical institutions in Liaoning province in 2011, and to analyze the status of dental manpower in non-public dental institutions in Liaoning province.

Methods: A mass survey on dental manpower was made in non-public dental institutions in Liaoning province in 2011 by means of questionnaire investigation, which included the institution type, dental devices, and the number, structure, composition, distribution of dental manpower in non-public dental institutions in Liaoning province. Data was entered with EpiData 3.