OBJECTIVEThis study aims to compare the treatment outcomes in patients with maxillary dentoalveolar protrusion by applying different anchorage methods via three-dimensional model measurement.

METHODSA total of 46 patients with maxillary dentoalveolar protrusion treated with bilateral maxillary first premolar extractions and high anchorage were selected. The subjects were randomly divided into three groups according to the type of anchorage applied, which included implant, extraoral, and Nance arch anchorages. The maxillary dental models were made before treatment and after space closure of maxilla. The movements of the maxillary central incisors and first molars were measured via a three-dimensional model measurement, and the amounts of movement were compared among the three groups.

RESULTSThe sagittal lingual movements of the maxillary central incisors were (-6.661 ± 1.328), (-5.939 ± 1.806), and (-5.788 ± 2.009) mm for the implant, extraoral, and Nance arch anchorage groups, respectively, with no significant difference among the three groups (P = 0.121). The corresponding vertical movements of the maxillary central incisors were (0.129 ± 1.815) mm intrusion, and (-2.162 ± 2.026), (-2.623 ± 1.776) mm extrusion. Significant difference was found between the implant anchorage group and the other groups (P < 0.05). The corresponding sagittal mesial movements of the maxillary first molars were (0.608 ± 1.045), (1.445 ± 1.462), and (1.503 ± 0.945) mm. The corresponding vertical movements of the maxillary first molars were (0.720 ± 0.805) mm intrusion, (0.076 ± 0.986) mm intrusion, and (-0.072 ± 0.690) mm extrusion. Significant difference was found between the implant anchorage group and the other two groups (P < 0.05). In the transverse direction, the first molars all moved lingually with no significant difference among the three groups (P > 0.05).

CONCLUSIONImplant anchorage may be superior in the vertical control of the maxillary incisors and in the sagittal, as well as in the vertical control of the maxillary molars, compared with the traditional anchorages during the treatment of patients with maxillary dentoalveolar protrusion.

OBJECTIVE:To investigate the characteristics and regularity of ADR induced by Iobitridol injection,and to provide reference for clinical drug use.METHODS:In retrospective study,the information of 72 patients suffering from ADR induced by Iobitridol injection were collected from our hospital during Jul.2015 to Jul.2016,and then statistical analysis was conducted in respects of age,gender,primary disease,organs/system involved in ADR,clinical manifestations,relationship evaluation and degree,occurrence time,outcomes,etc.RESULTS:Among 72 cases of ADR,the number of female was about twice of that in male.The age mainly distributed in the range of 50 to 80 years old (80.56％).ADR mainly occurred in skin and its appendants (30.57％),followed by systemic reactions (22.93％) and circulatory system (21.66％).ADR occurred within 20 min after medication (38.89％).58.33％ of ADR patients were cured,and 41.67％ were recovered.CONCLUSIONS:During the application of Io bitridol injection,a detailed understanding should be obtained about the patient's condition,medical history and the results of the examinations.Medical staff should inform the patient of the possible allergic symptoms,and do a good emergency preparation.

Objective To study the effect of chitosan/tricalcium phosphate(CTCP)on the attachment and proliferation of bone marrow stromal cells(BMSCs)cultivated in vitro and explore their biocompatibilities.Methods The CTCP was prepared by freeze-drying.BMSCs were cultivated in vitro,collected and seeded onto the surface of CTCP.Cell attachment and proliferation were obesrved using inverted light microscope and scanning electron microscopy(SEM).The cell proliferation was tracked by MTT method 2,4,6,8 d after seeding.Results BMSCs were fibroblast-like 2 d after seeding.The mean number of cells was(360?20) and(76?18),respectively,in the experimental and control group per 100 eyesight field,the difference was significant(P

Objective To investigate the clinical value of mitral valve quantitative(MVQ)soft ware,select the significant parameters in diagnosing mitral valve prolapse and analysis the mechanism of mitral valve regurgitation by MVQ in clinical.Methods Live three dimensional transesophageal echocardiography was performed on thirty-one patients,in which 13 patients with mitral valve prolapse,another 18 patients with suspected intracardiac thrombosis without mitral valve regurgitation regarded as control group.The images were stored and processed with MVQ soft ware off line.Eighteen parameters of mitral valve structure were measured in mitral valve 3D mode.Results Comparing with the control group,the parameters of mitral valve annulus of mitral valve prolapse were larger significantly(P＜0.05).Seven parameters of mitral valve leaflets,θant,θpost,θNPA,Htent,Vtent,L2DALPm,θAv-Mv,had no significant difference between tWO groups(P＞0.05).L3Dant,L3Dpost,Hprol,Vprol,A3Dpost,A3Dant of mitral valve prolapse were larger than those of control group(P＜0.05).Conclusions MVQ can measure the parameters of mitral valve stereo structure quantitatively,result in more detailed diagnosis of mitral valve disease by echocardiography,provide more important information to surgeons,and help them to formulate detailed and complete operation scheme.

AIM: To analyze the reasons of low vision and blindness in elderly patients and the application of optical aids in rehabilitation.METHODS: Totally 87 elderly patients which had 74 cases of low vision,13 cases of blind,including 53 males and 34 females.Routine internal and external eye examinations should be performed,and special removal examinations should be performed if necessary.Both refractive correction,and try with far and near optical aids,check after wearing a typoscope distant and near vision,distant vision ≥0.05 out the blindness,distant vision ≥0.3 out the disability.Near vision ≥ 0.5 was valid,<0.5 was invalid.RESULTS: Among 87 elderly patients with low vision,high myopia was the leading cause of blindness,followed by macular degeneration,cataracts,glaucoma and diabetic retinopathy.The visual acuity after refractive correction increased ≥ 2 lines in 62 cases (71%),visual acuity was not correct or corrected for ≤ 1 of 25 cases (29%).With aids,far visual was ≥0.3 of the 70 cases (80%),≥0.05 in 10 cases (11%),<0.05 in 7 cases (8%),residue removal rate of 92%.With reading glasses near and near visual acuity was >0.5 effective in 60 cases (69%),<0.5 ineffective in 27 cases (31%).Typoscope was often used in 58 cases,not often used 18 cases,11 cases rarely used or give up.CONCLUSION: High myopia is the leading cause of low vision and blindness in the elderly,followed by macular degeneration.The application of visual aids is still reliable and economical and effective treatment method,patients should be encouraged to use visual aids to improve the utilization rate of aids,so as to improve the quality of life of patients.

Objective To investigate the clinical diagnostic value of transperineal ultrasound in women in late pregnancy with stress urinary inconti?nence. Method Totally 66 cases of women in late pregnancy were selected,who did not suffer from SUI(groupⅠ),and 54 cases of women in late pregnancy who suffered from SUI(groupⅡ). Another 63 cases of healthy childless women were used as normal control(groupⅢ). Transperineal ultrasound was used to dynamically observe their pelvic floor structure,and the ultrasonic parameters were recorded and analyzed,including the posi?tion of bladder neck in X axis and Y axis((Djx,Dzx,Djy,Dzy)during resting period and tension period,the vesicourethral angle(αj,αz),the Bladder angle(βj,βz). The moving of the bladder neck in X axis(ΔDx=Dzx-Djx)and Y axis(ΔDy=Dzy-Djy),as well as the bladder rotation an?gle(Δβ=βz-βj)were calculated and the movement of the bladder neck(ΔD)was measured,followed by comparative analysis. The threshold val?ues of all ultrasonic parameters were determined by the ROC curve analysis. Results The bladder neck of all three groups were backward during tension period. Compared with groupⅢ,ΔDy,Djx,Dzx obviously decreased in groupⅠand groupⅡ,whileβj,βz,αj increased significantly.ΔDx of groupⅡwas significantly larger than that of groupⅢ(P<0.05);There was significant difference in Djy,Dzy,ΔD,Δβandαz among the three groups(P<0.05);In ROC curve analysis,when the critical value of Djy,Dzy,ΔDy,ΔD,αz andΔβwas-1.75 cm,-1.71 cm,0.25 cm,0.29 cm,131.5° and 3.5° ,their sensitivity was 88.9%,88.9%,72.2%,83.3%,88.9%and 72.2%,and the specificity was 72.2%,81.8%,72.7%, 95.5%,86.3%and 68.2%,respectively. Conclusions The transperineal ultrasound could clearly show the pelvic floor of the women in late preg?nancy,the bladder urethral support structure damage or defect was more serious in the women in late pregnancy who were suffering from SUI,and the determination of the critical values of all ultrasonic parameters helped the screening of SUI in women in late pregnancy.

Objective:To study the impact of smoking on C-reactive protein(CRP)concentration in gingival crevicular fluid(GCF) before and after initial treatment.Methods:18 smokers and 18 non-smokers with moderate or severe periodontal disease were recrui-ted into this study.The clinical indexes of periodontal examination of the patients were recorded,GCF samples of the patients were collected,CRP level in the samples was measured by radioimmunoassay balance method before and 4 weeks after initial treatment. Results:4 weeks after initial treatment,the clinical indexes and CRP concentration in GCF of the smoking group and non-smoking group were significantly lower than those before treatment(P <0.05),the changes of the smoking group were less than those of the non-smoking group(P <0.05).Conclusion:Smoking is an unfavorable factor of the initial periodontal therapy.

Objective:To evaluate the ectopia osteogenesis ability of rhBMP-2/nHA/Co compound membrane.Methods:Two membranes were fabricated:(1) nHA/Co group(2) rhBMP-2/nHA/Co group.Both of them was evaluated after implantation under thigh muscle of nude mice for 10,20,30 days.Results:More bone-like structures in rhBMP-2/nHA/Co group were found,than that in nHA/Co group.Conclusion:Collagen and nano-HA are suitable sustained release systems for rhBMP-2 in animal experiment and the rhBMP-2/nHA/Co compound membrane can effectively induce ectopia osteogenesis.

Objective To study the clinical features of the extra exocrine gland symptoms of primary Sjgren syndrome(PSS) in elderly people. Methods Clinical data of 106 cases of elderly and 120 cases of non elderly PSS were collected and analyzed. Results A total of 203 cases(89 8%, 203/226) manifested symptoms of extra exocrine glands, in which elderly and non elderly groups accounted for 106(100 0%) and 97(80 8%), respectively. The occurrence rates of arrhythma due to hypokalemia, peripheral neuritis(P0 05). Conclusions The common symptoms of PSS in patients, especially the elderly patients, are extra exocrine gland manifestations as the main complaints though the PSS is a systemic disease. These must be differenciated in order to avoid misdiagnosis.