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Objective@#To investigate the clinical effect of simplified drilling method and conventional drilling method in implants.@*Methods@#A total of 46 patients (62 implants) were enrolled in this study that with dentition defect from May 2015 to May 2016 in the Implant department of Xi'an Jiao Tong University. The experimental group and the control group were randomly assigned according to the random number method, 23 cases in each group. The experimental group used the simplified drilling method (guided drill+ final drill), the control group using the conventional drilling method (step by step drill). The operation time, implant stability, marginal bone resorption rate and implant retention rate were compared between the two drilling methods.@*Results@#The retention of the experiment group was 97% (31/32), the the control group was 100% (30/30). The operative time in the experiment group [(4.9±0.5) min] was significantly lower from the control group [(8.9±2.0) min] (P=0.000). There was no significant difference between the two methods in bone resorption (P=0.197), implant stability (P>0.05) and implant survival rate (P=0.492).@*Conclusions@#The simplified drilling method can significantly reduce the operation time without compromising the clinical outcomes, and the osseointegration is well. The simplified drilling method should be used when sufficient bone mass, careful use in class II bone, forbidden in class I bone.
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@#Objective To apply the surface electromyography (sEMG) in the evaluation of hand motor function for patients with hemiplegia after stroke. Methods From January to August, 2018, 43 hemiplegic patients with hand dysfunction after stroke were selected. All the patients received comprehensive rehabilitation for four weeks. Their root mean square (RMS) and integrated electromyography (iEMG) of wrist flexor (WF), wrist extensor (WE), extensor digitorum (ED) and abductor pollicis brevis (APB) were measured before and after treatment, while they were assessed with Fugl-Meyer Assessment (FMA) and Brunnstrom's stages for the affected hand. Results The FMA score and Brunnstrom's stages, as well as the RMS and iEMG of WF, WE, ED and APB increased after treatment (Z > 2.496, t > 5.361, P < 0.05). The FMA score positively correlated with the RMS and iEMG of WF, WE, ED and APB (r = 0.423-0.732, P < 0.05). The Brunnstrom's stages positively correlated with the RMS of WE, ED and ABP (r = 0.343-0.467, P < 0.05) and the iEMG of WF, WE and ABP (r = 0.223-0.328, P < 0.05). Multiple linear stepwise regression drew the RMS of ED and iEMG of WE as the related factors for FMA (t > 4.243, P < 0.001), and RMS of ED as the related factors for Brunnstrom's stages (t = 4.707, P < 0.001). Conclusions EMG is an effective tool to evaluate the motor function of hand for stroke patient as an objective and quantitative assessment, especially those of WE and ED.
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Objective:To measure the bioelectrical impedance around the dental implants with bone defects.Methods:Bilateral maxillar second premolar were extracted in 6 native mongrel dogs,implants were placed immediately with or without bone defect of corresponding alveolar bene.Impedance value(IV)between the implant and contralateral mouth corner was measured by LCR TEST-ER.IVs were compared and analyzed by SPSS.Results:IVs of bone defect group were bigger than that of control group(P <0.05), in largger defect group were smaller than that in smaller group(P <0.05).Conclusion:Bioelectrical impedance can be used as an evaluation of peri-implant bone defects and the size of bone defect.
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Objective: To compare JGW with autogenous bone when used as grafting material in maxillary sinus floor augmentation.Methods: A study was conducted by performing a bilateral maxillary sinus floor augmentation with autogenous bone and JGW(Jin Gu Wei,Golden Bone,bone substitute,Shanghai Xiaobo Tec.) on rabbits.The process of bone formation was evaluated during different periods by imageology and histomorphology methods.Results: At 2nd week the gray scale of JGW was very lower than that of autogenous bone,but no significant difference was found at 12th week.The number of osteoblasts decreased with the time,no significant difference was found at 12th week.The degradation of JGW was relatively faster.Conclusion: JGW is feasible in maxillary sinus floor augmentation.