Micro-invasive thoracic surgery has become new trends of thoracic surgery,and video-assisted thoracic surgery (VATS),which has the advantage of less trauma,rapid recovery and fewer postoperative complications,has become the mainstream of lung cancer resection.With the development of technology and surgical instruments,VATS has taken the place of open procedure,and the postoperatively follow-up also showed that both the two procedures have similar results in long-term survival rate and so on.With years of rapid develop,now the traditional VATS has nearly been perfect,the thoracic doctors eagerly try to find a new kind of micro-invasive surgery.It is in this background that Uniportal video-assisted thoracic surgery is born and it has been received by more and more operators.Uniportal VATS is not only inferior than multiportal VATS in Postoperative survival,but also has the advantage in reliving post thoracotomy chest pain as it only has one incision.In this paper,the author would like to summarize up the newest development of uniportal VATS in recently years.

Objective To measure the cancellous bone contents at different parts of the humeral heads of different ages and genders for data helpful for humeral head fixation.Methods Thirty-six patients with proximal humeral fracture were selected for this study who had been treated at our department with locking proximal humerus plate from June 2008 to April 2010.They were 18 men and 18 women,aged from 20 to 86 years (average,51.6 years).They were grouped according to age:group A ( ＜ 40 years),group B (40 to 60 years),and group C (＞ 60 years).A GE Sensation 16 CT scanner (GE Healtbcare,USA) was used to scan both of their affected and healthy humeral heads preoperation,with slices one mm thick.The bone density of cancellous bone was assessed by the CT value expressed in Hounsfield units.The maximum,minimum,and mean CT values were calculated for the cancellous bone in the humeral head in each image.CT images were processed by computer with custom software (Xiphoid 1.3,Image J 1.4g and Image-Pro Plus 6.0).All the data were analyzed with SPSS16.0.Results We found 4 weak point.s at the cortical bone of proximal humerus,correspondent with the 4 clinic CT types of proximal humeral fracture.The cancellous bone was the densest in the medial humeral head.The mean cancellous bone content was significantly lower in group C than in group A and B( P ＜ 0.05).There was a significant difference between men and women in group A in the BMD of cancellous bone ( t =4.744,P =0.001 ).Conclusions The cancellous bone content in the humeral head is related with age and gender.Since there is more cancellous bone in the medial part than in other parts of the humeral head,it is a reliable part for humeral head fixation.

Objective To explore the clinical application of reconstructing silicone elastomer nose prosthesis by means of selected laser sintering and wax powder PCPI. Methods Laser scanning was used to get the 3-D data of a nose model. Surfacere 10.0 etc softwares was used to reconstruct the nose by mirroring the digitalized model of absent nose. Selective laser sintering and wax powder was chosen to fabricate a wax nose model and the nose prosthesis made by silicone clastomer. Results Perfect silicone clastomer nose prosthesis was made for 2 patients. Conclusion This study suggests that the wax nose model and the new wax powder can meet the requirement of clinical expectation for maxillofacial prosthesis.

Objective The aim of this study is to present two novel technique?Lying on position and rotational board TSEI in which uniform dose to the whole body as well as the soles and vertex of scalp can be achieved in one electron beam treatment fraction. Methods Patients are treated with two groups in prone and supine position by leaning on inner rotational board in prone and supine position, each group can further be separated into two subgroup with tilting and rotation positions for treatment. By incorporating all these setting on the aswirl board with the optimal gantry angle, the patient will final accumulate compensated dosages on whole body surface. Results The dose uniformity for the rotational board?TSET or Lying on position could be control within ±10%. Conclusions The two TSEItechnique?Lying on and Rotational board TSEI techniques presented in this study is able to deliver a uniform dose to the patient’s skin surface as well as to the vertex and the soles all in one time, eliminating the troubles of having to further boost fields for these two regions when using the Stanford Six Field Technique.

Objective: To test the reliability of 3 dimentional (3D) laser surface scanner for nasal anthropometry.Methods:11 plaster nasal models were measured by 3D laser surface scanner and manual measurement. The data were statistically analyzed. Results:In 9 out of the 10 parameters of nasal anthropometry,the correlation coefficient of the distances and angels measured by the 2 means was 0.856-1.000(P

Objective:To build 3D digitized face model of unilateral orbital defect and to realize imitating design of defect section.Methods:Phase measuring profilometry was employed to acquire a 3-D digitized face model with open eyes.By Geomagic software,the image of normal orbit was extracted and mirrored with the image of the deformed side of the orbit.Results:A 3-D digitized face model of unilateral orbital defect was successfully reconstructed and 3-D normal orbit data of defect section was acquired.Conclusion:The use of phase measuring profilometry and RE software is a convenient and effective method to the computer-aided design for the restoration of unilateral orbital defect.

[Objective]To study the biocompatibility of nacre on cultured human osteoblasts in vitro.[Method]The iliac bone of human were added with collagenase-trypsin,a lot of osteoblasts were released out.Then the osteoblasts were purified and cultured.Subsequently,the 3rd generation cultured human osteoblasts were inoculated with the extract of three materials:nacre,hydroxyapatite,and rubber.The appearance of osteoblast was observed under the phase contrast microscope.Microstructure of the osteoblast was observed under transmission electron microscope.Additionally,to determine whether these three materials affect cell proliferation,the numbers of BrdU-labeled cells were examined at three groups.MTT assay was tested to observe the viability of human osteoblasts.[Result]Under the phase contrast microscope,the appearance of the osteoblasts in two groups were spindle or triangle like,and black nodes were seen in confluent cell layer 19 days after cultured.The observation of electron microscopy showed that the nucleus of the osteoblasts in two groups were big and round,and there were a large number of mitochondrion and rough endoplasmic reticulum in two groups.Stereological analyses of the numbers of BrdU-labeled cells revealed that females produced more cells than males in the dentate gyrus but not in the subventricular zone.[Conclusion]The nacre have no harmful effect to character of biology of human osteoblasts in vitro.

Objective:To evaluate the effects of pigment concentration on spectral reflectance of pigmented silicone elastomer.Methods: Six kinds of pigment at different concentrations was respectively added into MDX-4-4210 silicone elastomer to prepare six series of single-chroma-samples, including red, yellow, blue, brown, white and black.The pigment concentrations to base elastomer were set at 0.1, 0.2 , 0.3, 0.4, 0.5, 0.6,0.7, 0.8, 0.9 and 1.0C, respectively while other conditions were kept the same. C is the maximum pigment concentration in practical use. The target samples were also prepared. By spectrophotometer, the spectral data of the single-chroma-samples and target samples were measured.Results:With the increase of pigment concentration, the spectral reflectance of the six series of single-chroma-samples and target samples decreased.Conclusion:Increase of pigment concentration may result in decrease of spectral reflectance of single-chroma-samples and taget samples.

Objective:Through monitoring the pH of the growth medium,to evaluate the growth and/or acid production ability of Candida albicans on silicon elastomer incorporated with two different antifungal agents.Methods:Antifungal agents(AntimTM-AM and Conval pag-40)were added at concentrations from 0% to 2%,and antibacterial effect of the material in saliva and serum groups were examined.The third group added nothing was served as the control.Results:Each group with 2% antifungal agents showed great inhibitory effects on the acid production and /or the growth of C.albicans.These inhibitory effects consisted of a delay in the onset of rapid pH decline,decreased with the rate of pH change and increased in minimum pH.As a result,Conval pag-40 showed a significantly greater antimicrobial effect than AntimTM-AM.Conclusion:Silicone elastomer material incorporated with antifungal agents have strong antibacterial ability and can satisfy the requirements of clinical application.

Objective:To evaluate a new wax formed by laser sintering technology(SW-1)for dental use.Methods:The melting point,hardness and viscosity of SW-1,normal dental modeling wax and LongYuan's wax formed by laser sintering were tested and compared.Linear shrinkage,plastic deformation and toughness of SW-1 were estimated by national standards.Results:There were no significant differences between SW-1and the normal dental modeling wax in the properties of melting point 〔(61.1?1.63)℃,(61.7?1.96)℃〕and hardness 〔(75.2?0.62)HA,(74.0?0.54)HA〕;but when compared with melting point(78.3?1.07)℃and hardness(94.0?0.38)HA of LongYuan's wax formed by laser Sintering,those of SW-1 were significantly different.Viscosity of SW-1(2 016?136.9)MPa?s showed significant difference when compared with that of normal dental modeling wax(9.06?0.258)MPa?s and LongYuan's wax formed by laser Sintering(2 876?81.7)MPa?s.Linear shrinkage of SW-1(0.2%)met the national standards,while plastic deformation(10%,43 ℃)and toughness(broken when bent,20 ℃)of SW-1 did not meet such standards.Conclusion:SW-1 may be the proper laser sintering material for dental use,and has a good prospect in future.