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Study on Biotribological Behavior of the Combined joint of CoCrMo and UHMWPE/BHA Composite in a Hip joint Simulator

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Journal of Bionic Engineering 2009年第4期6卷 378-386页

作者： Qingliang Wang, Jinlong Liu, Shirong GeCollege of Materials and Engineering, China University of Mining and Technology, Xuzhou 221007, P. R. China College of Materials and Engineering China University of Mining and Technology Xuzhou P. R. China

UHMWPE composites reinforced with Bovine Bone Hydroxyapatite(BHA)in different contents were prepared by heat pressing formation method.A hip joint wear simulator was used to investigate the biotribological behavior of UHMWPE/BHA composite acetabular cups against CoCrMo alloy femoral heads in bovine synovia lubrication at 37±1 ℃.It was found that the addition of BHA powder to UHMWPE can improve the hardness and creep modulus of UHMWPE/BHA composites,and decrease their wear rates under bovine synovia *** the content of BHA filler particles was up to 30 wt%, UHMWPE/BHA composites demonstrated the well design performances of the surface and biotribological ***, ploughing and slight adhesive wear were the main wear mechanisms for UHMWPE and its *** addition,the sizes of wear particles became larger with an increase in BHA powder *** results suggest that BHA filler is a desirable component to increase the wear resistance of UHMWPE/BHA composites for biomedical applications.

关键词： UHMWPE hydroxyapatite biotribology joint prosthesis

Proximal humeral fractures treated with arthroplasty

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Chinese Journal of Traumatology 2005年第5期8卷 283-288页

作者：钱齐荣吴海山周维江李晓华吴宇黎 Department of joint Surgery Orthopaedic Department in Changzheng HospitalSecond Military Medical UniversityShanghai200003China

Objective: To explore arthroplasty in treating 3- and 4-part fractures of the proximal humerus. Methods: A total of 132 patients with proximal humeral fractures were treated in our hospital from July 1997 to February 2003. According to Neer’s classification, the fractures of 45 patients (14 males and 31 females, aged 31-78 years, 56.1 years± 7.8 years on an average) belonged to 3- or 4-part fractures (10 patients with 4-part fracture and 35 with 3-part comminuted fracture) and they were treated with shoulder joint arthroplasty. Unipolar prosthesis replacement of the head of humerus was made in 28 cases, while bipolar prosthesis replacement in 2 cases and total shoulder joint replacement in 15 cases. Results: During the follow-up period (range: 12-72 months, mean: 37.3 months± 4.1 months), among the 45 patients who suffered from fractures of the proximal humerus and underwent arthroplasty surgery, 44 patients ( 97.8%) had no postoperative pain and were satisfied with the active range of motion and with the whole treatment results. And radiography showed that the prostheses were at their good position. One patient had postoperative pain because he had so narrow medullary cavity that the humeral prosthesis could not be put deeply enough and the prosthesis head was a little higher over the anatomic level. He did not have good postoperative active range of motion, either. Then he received a review surgery and got satisfied results. Temporary shoulder stiffness was observed in one patient. Manual release of these adhesions improved the shoulder function. No evidence of nonunion of the fracture segments around the humeral prosthesis stem was found. Conclusions: Shoulder arthroplasty is a dependable method to restore the comfort and function of the should joints of the patients with 3- or 4-part fractures of the proximal humerus.

关键词： Shoulder fractures Arthroplasty joint prosthesis

Quantitative anatomic study of atlanto-odontoid joint and design of an artificial atlanto-odontoid joint for the orthopedic clinic

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Chinese Journal of Traumatology 2007年第3期10卷 138-144页

作者：胡勇杨述华谢辉徐荣明马维虎 Department of Orthopaedics Ningbo Sixth Hospital Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and Technology

Objective： To observe and measure morphological parameters of the Chinese atlanto-odontoid joint anatomically in order to provide an anatomic data for designing artificial atlanto-odontoid joint used for substituting the destroyed atlanto-odontoid joint in the orthopedic clinic. Methods： The relative anatomic parameters of 32 sets of fresh Chinese adults ＇atlanto-odontoid joint specimens were measured with a digital caliper and a goulometer, including the width of anterior arch of atlas （ AW）, the thickness of atlas at the junction of anterior arch and lateral mass （ AD）, the thickness and height of anterior tubercle of atlas （ AT and AH ）, the middle height, length and width of the lateral mass （MHL, L and LW ）, the height, transverse and anteroposterior distance of odontoid process （DH, DW and DD）, the retroversion angle of odontoid process （ β° ）, the facial angle of odontoid process （ θ° ） and so on. The data were statistically analyzed in order to ascertain the morphological parameter ranges of artificial atlanto-odontoid joint. An artificial atlanto-odontoid joint was designed according to these data. The operations of anlanto-odontoid joint arthroplasty were conducted in 3 cases of adult cadaver specimens. Resnits： The width of AW was （ 20.45 ± 1.5 3 ） nun, AD （3.91 ±1.32） nun, AT and AH （9.43± 1.93） nun and （ 10.23± 1.32 ） mm, respectively, MHL and LW （ 13.68 ± 1.38 ） mm and （ 12.98 ±1.52 ） mm, respectively, DH （15.25±2.11）mm, DW and DD （9.69±1.38）mm and （ 11.26 ± 1.02 ） ram, respectively, β° （ 12.23 ± 4.27 ） degree, θ° （ 65.48 ±2.17 ） degree. The prosthesis was composed of atlas part, axis part and accessories. Neither the vertebral artery nor the medulla oblongata was injured. Conclusions： The design of artificial atlantoodontoid joint is feasible according to these parameters. The artificial joint can not only rebuild the stability of atlanto-axial joint, but also reserve the rotation function between atlas and axis. Every part of the joint has their

关键词： Atlanto-axial joint joint prosthesis Atlanto-odontoid joint

Adjustable Artificial Hemi-pelvis and Total Hip joint Replacement after Resection of Innominate Neoplasm

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Military Medical Research 1987年第3期 205-209+291-292页

作者：刘植珊李光业陈永裕杨瑞和 Department of Orthopedics Changhai Hospital Second Military Medical College Shanghai

The traditional treatment for primary malignant tumors involving theinnominate bone is *** recent years,under the control ofchemotherapy or radiation therapy,partial or complete resection of innominatebone with preservation of the lower extremity has been *** 1983,five patients in our hospital have successfully undergone resectionof hemi-pelves and femoral heads,which were replaced by titanium-alloy hemi-pelves and total hip *** the five patients,two were diagnosed with *** after operations,they were treated with an adequate dosage of chemotherapywith no untoward *** the three-year follow-up they had no pain intheir affected limbs and could walk with *** of them resumed his *** other three patients diagnosed with giant-cell tumor of bone werefollowed up for ten months to one *** the operation,they all could walkwith *** on the experience in treating the five cases,we think that in carefullyselected cases,a limb-saving procedure,i.e.,inserting a prosthesis after hemi-pelvictomy may he indicated for preservation of the limb and its function.

关键词： neoplasma ilium adjustable artificial hemi-pelvis joint prosthesis

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氨甲环酸在人工关节外科领域的应用

中国骨与关节杂志 2014年第11期3卷 847-851页

作者：马金辉孙伟高福强王云亭李子荣北京大学中日友好临床医学研究所 100029 中日友好医院骨关节外科骨坏死与关节保留重建中心北京100029

关节外科手术失血量一般较大,初次人工全膝关节置换术(total knee arthroplasty,TKA)后的失血量可达到1000~1790 ml[1],初次人工全髋关节置换术(total hip arthroplasty,THA)失血量更大,平均可达到1944ml[2],脊柱外科手术亦有大量出血... 详细信息

关节外科手术失血量一般较大,初次人工全膝关节置换术(total knee arthroplasty,TKA)后的失血量可达到1000~1790 ml[1],初次人工全髋关节置换术(total hip arthroplasty,THA)失血量更大,平均可达到1944ml[2],脊柱外科手术亦有大量出血的风险。随着外科手术技术的提高,例如小切口全髋关节置换术(minimal incision THA,MIS-THA)等骨科微创手术,以及自体血回输、术后引流血回输、急性等溶性血液稀释。

关键词： Tranexamic acid(TXA) Hemostatics Postoperative hemorrhage joint prosthesis