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Objective@#To investigage the three-dimensional changes in condylar position after bilateral sagittal split ramus osteotomy (BSSRO) in skeletal class Ⅲpatients with mandibular deviation using cone-beam CT (CBCT).@*Methods@#Twenty-five skeletal class Ⅲ patients with mandibular deviation were included. The patients (12 males and 13 females, aged 19-25 years, average age 22.4 years) were treated in the Department of Orthodontics, Affiliated Stomatological Hospital, Nanchang University from October 2013 to March 2017. The patients were divided into T1, T2 and T3 groups (T1 group: CBCT taken within 1 week before operation; T2 group: CBCT taken within 1 week after operation; T3 group: CBCT taken 6-8 months after surgery). Three sets of image data of condyles on both sides (deviation side and contralateral side) were obtained. After the DICOM data collection, the software of Mimics 17.0 was used to perform three-dimensional reconstruction and condylar position measurements: the distance from the condylar top (CoT) to the standard horizontal plane (SHP), the middle sagittal plane (MSP) and the sella coronal plane (SCP) (CoT-SHP, CoT-MSP, CoT-SCP); the distance from the condylar center (CoC) to SHP, MSP and SCP (CoC-SHP, CoC-MSP, CoC-SCP); the angle from the condyle cella plane (CCP) to SHP, MSP and SCP (CCP-SHP, CCP-MSP, CCP-SCP); the angle from the condyle sagittal plane (CSP) to SHP, MSP and SCP (CSP-SHP, CSP-MSP, CSP-SCP) and the distance of the anterior, superior, posterior, medial, central and lateral joint space. One-way ANOVA and LSD-t test were used to compare the changes in condylar position at different periods (T1, T2, and T3).@*Results@#Within 1 week before operation on the deviation side, CoT-SHP [(2.5±1.3) mm], CSP-MSP (41.2°±8.4°) and the posterior joint space [(2.0±0.6) mm] were obviously increased (P<0.05), and CoT-SCP [(9.1±3.3) mm], CCP-MSP (78.2°±5.2°) were decreased significantly (P<0.05); on the contralateral side, CoT-MSP [(50.4±3.1) mm], CCP-MSP (80.6°±6.0°), the anterior joint space [(2.2±0.6) mm] and the medial joint space [(2.6±0.6) mm] were obviously increased (P<0.05), and CCP-SCP (11.4°±8.8°) were decreased significantly (P<0.05). Six to eight months after surgery, CoT-SHP [(2.2±1.0) mm] and the posterior joint space [(1.9±0.5) mm] on deviation side and CoT-SCP [(8.4±2.8) mm] on the contralateral side were increased significantly (P<0.05). No significant difference was found in other measurements (P>0.05).@*Conclusions@#The condylar position in skeletal class Ⅲ patients with mandibular deviation was asymmetrical. Within 1 week after the operation of BSSRO, the condyle on the deviation side was moved forward, downward and inward. Meanwhile, the condyle on the contralateral side was moved backward and outward. Six to eight months after surgery, the condylar position on both sides was gradually restored to the pre-operative condylar position.
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Objective Purpose to study the domestic conditions of co-authorship in the field of dermatology and venereology in recent five years.Methods Taking 9 higher impact factor periodicals of the field as samples and using UCINET software to conduct research from following three perspectives,density,degree centrality,betweenness centrality and subgroup analysis.Results The density of co-authoring network is 0.3313.SUN Jian-fang possesses the highest value of degree centrality,and HUANG Chang-zheng's value of betweenness centrality is the highest.Ten 2-plexes are found in 122 core authors.Conclusions The study found that papers in this field have a high co-authored rate.But the lower network density and isolated nodes indicate that the connection between core authors is loose.There are more notable differences between active authors than inactive ones.The consistency of overall network is poor and other authors’ dependence of central authors is weak across the entire network.Meanwhile,authors of this field have not yet formed a subgroup phenomenon.
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Objective To establish a small amount of acid ,microwave digestion‐atomic fluorescence spectrometer method was developed for the determination of arsenic and mercury in eggs at the same time .Methods The sample was digested with 1 ml HNO3 ,After digestion ,the sample was deoxidized with sulfocarbamide and vitamin C and then determined by AFs without dispel‐ling the acid .Results The sample was digested with 1 mL HNO3 ,After digestion ,the sample was deoxidized with sulfocarbamide and vitamin C and then determined by AFs without dispelling the acid .Conclusion The method is simple ,rapid and with little pol‐lution .The determination of arsenic and mercury in eggs by Atomic Fluorescence Spectrometry using microwave digestion were de‐veloped with satisfactory sensitivity ,accurate and precision .
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Objective To establish a method for determination of dichloromethane in drinking water by purge and trap gas chro‐matography‐mass spectrometry .Methods Dichloromethane in drinking water was purged and trapped ,then desorbed and detected by using gas chromatography‐mass spectrometry .Quantitive analysis was conducted by using standard curve under selected ion mo‐nitoring (SIM) mode .Results The operation of this method was simple ,and its limit of detection (LOD) was 0 .005 ng/mL .The recovery rate was higher than 97% ,and the relative standard deviation was less than 5% .Conclusion The method may be appro‐priate to measure dichloromethane in drinking water .
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Carcinoma ex pleomorphic adenoma occurring in the sublingual gland is extremely rare. In this report, a case of adenoid cystic carcinoma ex pleomorphic adenoma of the sublingual gland was presented.
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Humans , Adenocarcinoma , Adenoma, Pleomorphic , Sublingual Gland , Sublingual Gland NeoplasmsABSTRACT
Objective The purpose of this article is to analyze the domestic situation of co-authorship in the field of international classification of diseases using Social Network Analysis.Methods Using UCINET to do this research from the following five perspectives,namely density,degree centrality,betweenness centrality,closeness and subgroup analysis.Results The density of co-authoring network is 0.0021.The number of nodes which made up the main component accounts for 3.46％ of the total nodes.Lin Jie-zhong possesses the highest value of degree centrality,and Guo Yun-qing's value of betweenness centrality and closeness is the highest.Forty-four 2-plexes are found in all authors.Conclusions Currently,the co-authorship is not close,but to a certain extent,the authors liked Lin Jie-zhong,Liang Yao,Li Jian-wei,Fan Wei,Guo Yun-qing,Liu Ai-min and so on constitute the core members or leaders.From the overall point of view,the authors in this field have not yet formed a subgroup phenomenon obviously.The structure of this co-authoring network is loose and isolated.
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The gold hollow nanospheres have been synthesized by sacrificE-template method and the obtained sample has been characterized by TEM, SEM and XRD. The amperometric formaldehyde gas sensor was assembled with gold hollow nanospheres as the active electrode material and 1 mol/L KOH solution as electrolyte. The equation of linear regression(y=16.63x+4.063×10-7, r=0.9989)between the oxidation current(y(A))and the concentration of formaldehyde(x/(mol/L)) was obtained at the formaldehyde concentration in the range of 0 to 2.23×10-6 mol/L. The sensitivity of the sensor with gold hollow nanospheres as active material increased by about 70% compared with the sensor made of nanoparticles which had the same gold-loading in the work electrode, this method exhibits an advantage of decrease in the cost of the noble metal. This kind of sensor shows potential application in formaldehyde gas detection in this range due to its excellent sensitivity, stable response and good linear relationship.
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0.05).All cases showed normal bone formation. Conclusion:There is no significant influence on tibial growth if cancellous bone harvesting is controlled strictly in two third of total amount from tibial proximal metaphyses.