Objective To describe the surgical technique for treatment of old traumatic posterior acetabular defects. Methods From March 1990 to March 1998, 6 patients were treated with a full thickness iliac crest autograft to reconstruct their posterior acetabular defects. There were 4 males and 2 females, the average age of the patients was 32 years. The acetabular defects were caused by traffic accident and delayed in treatment for 3 to 11 months. Results The duration of follow up was 2－ 10 years， the function of the hip joints were good in all of the patients, according to the criterion of d Aubigne six points. X－ ray film revealed that although the femoral head was not in exact congruence with reconstructed acetabulum, yet there was no dislocation. Slight degeneration was found in 3 cases. Conclusion Although this procedure did not exactly reproduce the anatomy of the hip joint, it restored the posterior stability, provided bone stock for the hip joints and prevented dislocation of the femoral head. So this procedure is useful for late total hip arthroplasty.

Objective To review the clinical results of cemented and uncemented revision total hip arthroplasty(RTHA). Methods The diagnoses included aseptic loosening of the femoral components in 23 cases, fractures around the tip of loosened femoral components in 3 cases. Of 26 cases, 10 cases(10 hips)underwent RTHA by the use of the second generation cementing techniques, 16 cases(16 hips)underwent uncemented RTHA with a long stem porous coated femoral component assisted with autografting. Results At an average of 6 years of follow- up for cemented RTHA, clinical results were evaluated as excellent or good in 5 hips(50％ ),fair in 3 hips(30％ ) and poor in 2 hips(20％ ), re- revision in 1 hip(10％ ). X－ ray film revealed definite loosening in 2 hips, probable loosening 1 hip, possible loosening 5 hips, and no loosening 2 hips. At an average of 5 years follow- up for uncemented RTHA,clinical results were evaluated as excellent in 9 cases(56％ ),good in 6 cases(38％ ), fair in 1 case (6％ ),no case need rerevision. X－ ray film revealed osseous fixation of the femoral components in 12 cases (75％ ), fibrous stability in 4 cases (25％ ). The apparent reconstitution of femoral bone structure present in the area of previous osteolysis or cortical thinning. Conclusion Clinical results of the uncemented RTHA are significantly superior to that of cemented RTHA. Reconstructing any structural bone loss with cancellous autograft and getting adequate mechanical fixation with a long stem porous- coated prosthesis may contribute to the good results of uncemented RTHA.

Objective To investigate the surgical outcome of cervical spondylotic myelopathy. Methods Twenty -five patients (14 males and 11 females) with cervical spondylotic myelopathy who underwent operative treatment between 2004 and 2007 in our hospital were included in this study. The mean duration of symptoms was 31 months (ranging from 8 days to 10 years) . The follow - up period ranged from 18 months to 4 years (mean 30 months). The study comprised 6 posterior decompression (laminoplasty) and 17 anterior cervical discectomy with fusion and anterior locking plate systems. 2 patients with severe cervical spondylotic myelopathy were treated by operation of the combining anterior and posterior. Results According to COA, the recovery (improving) rate among the tolal patients was classified as exellent in 20 cases, good in 3 cases, fair in 2 cases. The excellend and good rate was 92% . Conculusion Both anterior and posterior surgery were effective for cervical spondylotic myelopathy with effective decompression according to the location of abnormality.

Objective:To investigate the availability, prices and affordability of essential medicines in pediatric population across China, in the hope of improving rational use of medicines.Methods:A multicenter cross-sectional survey of medicine prices, availability and affordability was conducted in 17 provinces, municipalities and autonomous region across east, south-central part, west and north of China. Data on 42 medicines used in pediatric population, both original and generic, were collected in 55 public hospitals from May 26 to June 2, 2017. Availability was expressed as the percentage of hospitals with stock of the target medicine on the day of data collection,and median price ratio (MPR) was the ratio of price upon investigation to international reference. Based on national minimum daily wage, affordability represents the number of working days needed to earn the expense which covers a standard course using the target medicine. Statistical software SPSS 13.0 was applied for descriptive analysis of availability, MPR and affordability.Results:Mean Availability of original and generic medicine was 33% and 32%, with median MPR being 5.43 and 1.55. Among the 19 medicines with price information for both original and generic product, the median MPR was 7.73 and 2.04 respectively. Regarding the five medicines used to treat four common pediatric diseases (pneumonia,peptic ulcer, congenital hypothyroidism, refractory nephrotic syndrome), the affordability was 0.63 (0.16-6.17) d for generic medicine, and 1.03 (0.16-11.53) d for its original counterpart.Conclusions:The availability to both original and generic products of the 42 medicines used in pediatric population was low in China. The prices of generic medicines seem to be lower and affordability higher than those of original medicines. There is an urgent need to improve the availability and affordability of pediatric medicines.

Drugs under special management include narcotic drugs,psychotropic drugs,toxic drugs for medical use,radiopharmaceuticals,and pharmaceutical precursor chemicals.Supervising and guiding the clinical use of drugs under special management is one of the important responsibilities of the Pharmaceutical Management and Drug Therapy Committee(Group)of medical institutions.The standard for drugs under special management is led by the Pharmaceutical Professional Committee of the China Hospital Association,which standardizes 16 key elements of organizational management,process management,and quality control management drugs under special management in medical institutions.It can guide the standardized implementation of Pharmaceuticals under special control work in various levels and types of medical institutions.This article elaborates on the methods and contents of formulating standards for Pharmaceuticals under special management,to provide reference and inspiration for medical institutions to carry out special drug drug management and daily related work.