[Research on Self-tapping Performance Test of Self-tapping Bone Screws].

Objective: To study the self-tapping performance test method of self-tapping bone screws based on the YY/T 1505 standard.

Methods: With reference to the method of YY/T 1505, various factors affecting the self-tapping force test was optimised, and the self-tapping force judgment method was improved.

Results: The experimental results showed that the self-tapping force obtained by the improved self-tapping force judgment method has good repeatability and high stability of the experimental data.

[Study on the Fixation Effect of Plate in the Middle Tibial Fracture Based on Finite Element Analysis].

In this study, tibial shaft fracture has been treated with implants as numerically to investigate the stress behavior and the effect of plate material, position and length under pressure load. Plates of stainless steel, titanium alloy(Ti6Al4V), or CF-PEEK(CF50) were used to fix the tibial shaft comminuted fracture in different location and different working length. The maximum stress, the maximum micromotion of fracture and the stress shielding of cortex bone were analyzed.

[New Design of Revivent TC System].

Left ventricular aneurysm (LVA) is a common complication of myocardial infarction. Traditional medical and surgical treatments are not effective or require high doctors' operational skills and patients' physical fitness. With the development of minimally invasive medical devices, it becomes possible for revivent TC system to treat LVA and reconstruct the left ventricle.

[Study on the Testing of Anti-deforming Capability of Sterile Vagina Dilator for Single Use].

The single-use sterile vagina dilator is the common medical device mainly used for gynecological examination, and the anti-deforming capability is the key property assuring safety and efficiency. The influence factors of deformation capacity are studied and analyzed according to the testing method described in the standard YY 0336-2013.

[Finite Element Analysis of Biodegradable Polylactic Acid Stent].

Biodegradable vascular stent, also known as the third generation stent, has recently been widely studied. Finite element models of three stents with the same structure and different specifications were developed. The mechanical behavior under crimping, expanding and fatigue testing were assessed by von Mises yield and Goodman convergence.

[A Drug Delivery Device for Drug-eluting Stents Simulating the Cardiovascular Blood Flow Pattern].

A novel drug delivery device simulating the cardiovascular bloodfl ow pattern was introduced. The device was used to simulate the in vivo drug release in the drug-eluting stents. The results regarding the drug release rate were subject to the pattern from in vivo measurement.

Outcomes of endovascular treatment for patients with TASC II D femoropopliteal occlusive disease: a single center study.

Background: Advances in endovascular technology led to an alternative treatment option for TASC II D (TransAtlantic Inter-Society Consensus II class D) lesions. This study was aimed to evaluate the outcomes of endovascular treatment for TASC II D femoropopliteal lesions.

Methods: Endovascular intervention with bare nitinol stent implantation was performed on 58 limbs (53 patients) with TASC II D femoropopliteal lesions from January 2011 to March 2013.

[Study on the release of copper ion and corrosion for intrauterine contraceptive device with two kinds of Cu-containing stent].

Two kinds of Cu-containing intrauterine contraceptive device (Cu-IUD) has been evaluated through the study on the release of copper ion and corrosion of copper surface in artificially formulated fluid. The result showed that the copper ions were released profusely from the stainless steel stents Cu-IUD in the first week of soak (25-12 microg/d), and then it became slowly and steady. The release of the copper ions from the titanium nickel shape memory alloy stents Cu-IUD were always slowly and steady in two months (0.

[Analysis the cupric ion release characteristics of different copper raw materials in intrauterine device in vitro using ICP method].

Objective: To study the Cupric ion release characteristics of different copper raw materials in intrauterine device in vitro by ICP. Reveal the relationship between purity and shape of Cu-IUD copper and copper ion release.

Methods: According to a certain proportion, the copper raw materials were 100 times diluted into the simulated uterine solution at 37 +/- 0.

[Optimization based on finite element technique of nitinol stent].

The finite element method was used for simulating the mechanical performance and fatigue safety of three different structures of Nitinol stent. According to the actual situation, after proposing reasonable assumptions and simplification, the geometry model and finite element model establishment, material mode selection and boundary condition setting are completed. The strain and fatigue life of different stent edges wide (omega) or strut angle (theta) are computed.

[Research and analysis of failure data of contemporary artificial joint registration system].

This paper is aimed to focus on the joint prosthesis failure event, to collect the statistic data about the failure of artificial joints issued by authoritative organizations at home and aboard, and to compare the functions of different types of the artificial joints. We generalized and compared current study analyzing the failure reason and type of joint prosthesis, and categorized the failure events according to the failure occurring time, i. e.

[FE modeling and analysis of the locking plate for proximal humerus fracture].

The FE model of proximal humeral locking plate was established and analyzed to provide academic support of the proximal humeral locking plate failure. The stress distributions of the locking plate were observed under the situations of the fracture area providing support and without support. In summary, this type of locking plate cannot afford the stress at 120 degrees abduction position under the situation of fracture area provides without support.

[Design & development of orthopedics implants failure management system].

The orthopedics implants failure management system has been put forward according to the present status. The function of the system and typical failure case reasoning route also have been described. Furthermore, the analysis process has been presented by illustrating a typical failure case analysis.

[The artificial joint failure types and analysis].

This paper focused on the joint prosthesis failure event, through survey and investigation in different kinds of case studies, generalized and analyzed the failure reason of joint prosthesis. The failure reason been categorized according to the failure occurring time: short-term, medium-term and long-term, and for each category, the characteristics and root causes are discussed, and the corresponding countermeasures put forward.

[Failure analysis of orthopedic implants].

The clinical failure factors of Orthopedic implants which happened recent years have been summarized. The main failure factors are quality of orthopedic implants itself, iatrogenic and patient-derived. The ways to preventive measures have been suggested.