Stomatological Hospital of Urumqi
Stomatological Hospital of Urumqi
Han R.,Qingdao University |
Ma L.,Qingdao University |
Mi C.-B.,Xinjiang Medical University |
Wang L.,Stomatological Hospital of Urumqi |
And 2 more authors.
Chinese Journal of Tissue Engineering Research | Year: 2016
BACKGROUND: To make a better preparation for orthodontic tooth, we investigate the changes in the localization of the anterior wall of the maxillary sinus and maxillary tuberosity, analyze the development of the maxilla, and detect the bone mass of the maxilla and development timing. However, the use of Auto-CAD software has not been reported to localize the anterior wall of the maxillary sinus and maxillary tuberosity. OBJECTIVE: To investigate the localization and growth of the anterior wall of the maxillary sinus and maxillary tuberosity in 300 children aged 4-14 years from the Han ethic group in Urumqi, Xinjiang Uygur Autonomous Region, China. METHODS: Totally 300 children, 4-14 years of age, admitted at the Stomatological Hospital of Urumqi, Xinjiang Uygur Autonomous Region, China, were enrolled. According to Hellman’s dental developmental staging, these children were divided into five groups: groups IIA, IIC, IIIA, IIIB, IIIC. Auto-CAD software was used to analyze the panoramic radiographs of the maxilla and mandible. The tracing of each radiograph was digitized by translating the reference points onto an X-Y coordinate system. The straight line that passed the point where the nasal septum intersected with the hard palate (point O) and the point where the medial wall of maxillary sinus intersected with the hard palate (point PA) was designated as the X axis. The straight line that was vertical to the X axis and passed through the point O at a right angle was designated as the Y axis. The X and Y coordinate values of reference point were calculated. And then O point was set as (0, 0), and the point where the posterior wall of maxillary tuberosity intersected with the hard palate (PP) was set as (PPX, PPY). Collected data were analyzed statistically to understand the changes in the localization of PA and PP at different stages of dental development. RESULTS AND CONCLUSION: The change of point PA had on significant differences between the five groups (α > 0.05). Point PP grew obviously in a horizontal rearward and vertical downward manner from stage IIA to IIIA; this point only presented a horizontal rearward growth from stage IIIA to IIIB and only a vertical downward growth from stage IIIB to IIIC. This period was the time of the second molar eruption, indicating that the second molar eruption is helpful to the vertical growth of the maxilla. © 2016, Journal of Clinical Rehabilitative Tissue Engineering Research. All rights reserved.
Li Z.,Xinjiang Medical University |
Cui J.,Xinjiang Medical University |
Wang X.,Xinjiang Medical University |
Man Y.-N.,Stomatological Hospital of Urumqi |
And 2 more authors.
Chinese Journal of Tissue Engineering Research | Year: 2013
Background: Splint-like porcelain-fused-metal bridge for periodontal bone defects accompanied by dentition defects induced by periodontitis can increase the bone mineral density rather than bone height around the tooth root. Therefore, there are some limitations for pure splint treatment in the repair of periodontitis-induced periodontal bone defects accompanied by dentition defects. Objective: To compare the restoration method of bone graft in combination with splint-like porcelain-fused-metal bridge treatment and splint-like porcelain-fused-metal bridge alone on curing periodontal disease patients with periodontal bone defects, and to analyze the periodontal conditions. Methods: Twenty patients with periodontitis accompanied by Kennedy III dentition defects, who had alveolar bone absorption and were scheduled for porcelain crown treatment, were randomly divided into bone graft group and non-bone graft group, 10 patients in each group. In the bone graft group, bone graft plus splint-like porcelain-fused-metal bridge was performed; only splint-like porcelain-fused-metal bridge was in the non-bone graft group. Gingival crevicular fluid samples from the groups were collected at 0, 3, 6 months after treatment for measurement of interleukin-1β level. Probing depth and clinical attachment loss were also reexamined and recorded. Results and Conclusion: Interleukin-1β level decreased gradually in the two groups (P < 0.05), which was decreased more significantly in the bone graft group as compared with the non-bone graft (P < 0.05). As time went by, the probing depth and clinical attachment loss were also decreased in the two groups, which were more significant in the bone graft group (P < 0.05). In addition, there were significant differences in the probing depth and clinical attachment loss of the bone graft group at different time (P < 0.05). These findings indicate that the combination of periodontal bone graft and splint-like porcelain-fused-metal bridge is more effective and beneficial to periodontal tissue reconstruction with periodontal bone defects than the simple splint-like porcelain-fused-metal bridge.
Wang J.,Xinjiang Medical University |
Zhao X.,Stomatological Hospital of Urumqi |
Mi C.,Xinjiang Medical University |
Raza I.,Xinjiang Medical University
Forensic Science International | Year: 2016
Facial profile is an important aspect in physical anthropology, forensic science, and cosmetic research. Thus, facial soft tissue measurement technology plays a significant role in facial restoration. A considerable amount of work has investigated facial soft tissue thickness, which significantly varies according to gender, age, and race. However, only few studies have considered the nutritional status of the investigated individuals. Moreover, no sufficient research among Chinese ethnic groups, particularly Xinjiang population in China, is currently available. Hence, the current study investigated the adaptability of facial soft tissue to the underlying hard tissue among young adults of Han population in Xinjiang, China; the analysis was performed on the basis of gender, skeletal class, and body mass index (BMI). Measurements were obtained from the lateral cephalometric radiographs of 256 adults aged 18-26 years old. Differences in soft tissue thickness were observed between genders and among skeletal classes. With regard to gender, significant differences in soft tissue thickness were found at rhinion, glabella, subnasale, stomion, labrale superius, pogonion, and gnathion among different BMI groups. Thus, nutritional status should be considered when reconstructing an individual's facial profile. Results showed that the thinnest and thickest craniofacial soft tissues existed in rhinion and lip regions, respectively. Overall, this research provides valuable data for forensic facial reconstruction and identification of young adults in Xinjiang, China. © 2016 Elsevier Ireland Ltd.