[Medium term follow up outcomes of uncemented total hip arthroplasty for traumatic arthritis after intramedullary nail fixation of femoral intertrochanteric fracture].

Objective: To evaluate the effect of uncemented total hip arthroplasty(THA) on treatment of traumatic arthritis caused by intramedullary nailing interfixation of intertrochanteric fractures.

Methods: Total of 22 patients treated with THA due to traumatic arthritis caused by intramedullary nailing interfixation of intertrochanteric fractures from January 2012 to January 2017 were studied retrospectively, including 10 males and 12 females with a mean age of (72.5±9.

[Risk factors for infections after arthroscopic rotator cuff repair].

Objective: To explore risk factors for infections after arthroscopic rotator cuff repair, and improve the under standing for reducing infection.

Methods: Clinical data of 2 591 patients who underwent arthroscopic rotator cuff repair from January 2019 to January 2022 were retrospectively analyzed, including 1 265 males and 1 326 females, aged from 25 to 82 years old with an average age of (51.5±15.

[Analysis of risk factors of healthy side fracture after hip fracture surgery in the elderly].

Objective: To investigate the incidence and related risk factors of healthy side fracture after hip fracture surgery in the elderly, so as to provide basis for the prevention of re-fracture.

Methods: The data of 452 patients over 65 years old with femoral neck fracture or intertrochanteric fracture treated with hip arthroplasty or proximal femoral intramedullary nailing from June 2012 to June 2017 were analyzed, including 168 males and 284 females, the age ranged from 65 to 97(75.5±7.

[Surgical treatment for limbs salvaged of diabetic foot ulcers].

Diabetic foot ulcers (DFUs) is a severe complication of the diabetes mellitus, which is the first leading cause of non-traumatic lower limbs amputations. The pathogenesis of diabetic foot involves a variety of mechanisms, treatment involves the department of foot and ankle surgery, department of vascular surgery, endocrinology, and infection control. Treatment need multidisciplinary diagnosis and treatment.

[Clinical study of movable external fixation for elbow tuberculosis].

Objective: To compare clinical effect of movable external fixation and fusion fixation for the treatment of elbow tuberculosis.

Methods: From October 2013 to June 2019, 52 patients with elbow tuberculosis treated with standard antituberculosis therapy were divided into movable external fixation group and fusion fixation group according to treatment methods. In group A, there were 25 patients, including 11 males and 14 females, aged from 24 to 75 years old with an average of (42.

[Progress on surgical treatment for elbow tuberculosis].

Elbow tuberculosis is a rare disease of infectious osteoarthritis. The aim of operation for elbow tuberculosis is to maintain joint function, ensure stability of joint and improve quality of life, while there were controversies about the implementation details of different procedures. For elbow tuberculosis at an advanced stage, the clinical effect of forked osteotomy arthroplasty is effective and could meet with most patients without demand of strength.

[Application of three-dimensional printing technology to design individual angle section on Chevron of hallux valgus osteotomy].

Objective: To explore clinical application of three-dimensional printing technology to design individual angle section on Chevron of hallux valgus osteotomy.

Methods: From May 2013 to May 2016, 47 patients(66 feet) with mild to moderate hallux valgus treated by Chevron osteotomy according to different preoperative design were divided into computer osteotomy group(group A) and traditional osteotomy group(group B). In group A, there were 25 patients (33 feet), including 4 males(5 feet) and 21 females(28 feet) with an average age of (47.

[Choices of the internal fixation and approaches on unstable pelvic ring fractures].

Objective: To discuss the suitable surgical approach and the internal fixation of unstable pelvic pelvic fractures.

Methods: From May 2010 to May 2015, 45 patients with unstable pelvic fractures were treated with different approaches and fixations, including 38 males and 7 females with an average age of 45 years ranging from 21 to 61 years. The course was within 2 weeks.

[Clinical observation of minor external fixation combined with Kirschner wire for open comminuted fracture of metacarpophalangeal joint].

Objective: To explore the method and therapeutic effect of minor external fixation combined with Kirschner Treatment for open comminuted fracture of metacarpophalangeal joint.

Methods: From January 2013 to December 2014, 13 patients with open comminuted fracture of metacarpophalangeal joint were treated by minor external fixation combined with Kirschner wire, including 9 males and 4 females, aged from 18 to 56 years old with an average of 35 years old.According to Gustilo classification, 8 cases were type II, 4 cases were type IIIA, and 1 case was type IIIB.

[Surgical treatment of multiple ligament injuries of knee joints].

Objective: To study operative effects for the treatment of multiple ligament injuries of knee joints.

Methods: From 2008 to 2013, 26 patients (17 males and 9 females) with multiple ligament injuries of knee joints were treated surgically. The average age was 40.

[Surgical treatment and construction for traumatic floating shoulder].

Objective: To explore surgical therapeutic strategies and clinical effects for floating shoulder injury.

Methods: From March 2010 to December 2013, 12 patients with floating shoulder injury were treated by open reduction and plate screw fixation,including 10 males and 2 females aged from 22 to 45 years old with an average of 31.7 years old.

[Treatment of thoracolumbar fractures with unilateral pedicle screw fixation through paraspinal approach].

Objective: To evaluate the feasibility and efficacy of unilateral pedicle screw fixation in treating thoracolumbar fractures through paraspinal approach.

Methods: From January 2006 to January 2009,21 patients with single level thoracolumbar fracture without neurological symptoms were treated with unilateral pedicle screw fixation through paraspinal approach. There were 14 males and 7 females,aged from 21 to 65 years old with a mean of 36.

[Treatment of proximal humeral fractures with percutaneous locking plate fixation through lateral deltoid approach].

Objective: To investigate the effects of locking plate fixation through lateral deltoid approach for proximal humeral fracture combined with micro-invasive percutaneous plating (MIPPO) technique.

Methods: From April 2009 to March 2012,26 patients with proximal humeral fractures were treated with proximal humeral locking system plate fixation through lateral deltoid approach, including 17 males and 9 females with an average age of 58 years old ranging from 28 to 76 years old. The time from injury to operation was 3 to 10 days (averaged 5.

[Choice of operative approaches for complex fractures of the quadrilateral area of acetabular].

Objective: To compare different surgical approaches in order to obtain better surgical exposure and more reliable reset fixation according to the different types of quadrilateral area fractures of acetabular.

Methods: From January 2006 to January 2011, 58 patients with the quadrilateral area fractures of acetabular were treated by surgical operation through the simple Kocher-Langenbeck (KL) approach, ilioinguinal approach, modified Stoppa approach, or combined surgical approach, or a combination of anterior column screw fixation percutaneously and modify Stoppa approach.

Results: Forty-nine patients were followed up for an average time of 32 months ranging from 2 to 6 years.

[Curative effect analysis of surgical treatment of Lisfranc joint injuries].

Objective: To investigate the clinical results and influence factors in surgical treatment of the Lisfranc joint injury.

Methods: From Jan. 2009 to Nov.

[Anatomical study on the treatment of complex acetabular fractures with self-designed 3-dimensional anatoimical locking plate].

Objective: To design a new 3-dimensional anatomical locking plate internal fixation on the basis of anatomic character of acetabulum for treating complex acetabular fractures except the posterior wall and posterior column fracture, and to investigate its advantages and disadvantages.

Methods: Five fresh adult cadavers and 40 biopsy specimens of pelvic cavity were collected. The length and radian of iliopectineal crest and pecten pubis,the distance from acetabular index to iliopectineal crest were measured to guide the research and development of the 3-dimensional anatomical locking plate internal fixation for complex acetabular fractures through the ilioinguinal approach or combined with Stoppa approach.

[Clinical application of the percutaneous retrograde acetabular anterior horn screw fixation].

Objective: To investigate the clinical usage of percutanious retrograde acetabular anterior horn screw fixation.

Methods: From June 2006 to November 2011,27 patients with anterior horn accetabular fractures were treated with percutaneous retrograde screw. There were 20 males and 7 females with an average age of 35 years (ranged,20 to 61).

[Treatment of Gustilo III distal tibiofibula fractures through trans-fibular anterior-lateral approach].

Objective: To explore the methods and therapeutic effects of trans-fibular anterior-lateral approach combined with external fixation in the treatment of Gustilo III distal tibiofibula fractures.

Methods: From 2007 to 2010,9 patients including 7 males and 2 females with the mean age of 40 years(ranging from 29 to 51 years). All patients received internal fixation of fibula after debridement on the first phase, external fixator were used to fix tibia across ankle joint, and removed after successful skin graft; The second phase tibia was used to fix through the lateral incision used in phase I.

[Biomechanics research of thoracolumbar vertebral burst fracture in impact damage].

Objective: To investigate the damage characteristics and biomechanical mechanisms of the thoracolumbar vertebral bursh fracture during the impact loading.

Methods: From September 2008 to October 2009, 10 fresh human thoracolumbar spine specimens were collected for experimental model and divided into two groups. Biomechanical static and dynamic impact strength test were performed respectively in two groups.

[Application and progress of the finite element analysis model of cervical vertebrae].

Finite element analysis (FEA) is broadly used in engineering, it was initially applied to simulate and solve a variety of engineering mechanics, thermal, electromagnetics, and other physical problems. The principle is a collective to be composed by an infinite number of particles, and an unlimited number of degrees of freedom from the continuum approximation. Brekelmas and Ryblcki firstly applied the finite element method to orthopedic biomechanics research in 1972.

[Influence of the fusion of bone graft in spine of rabbit treated with lower intensity ultrasound].

Objective: To observe the influence of the fusion of bone graft in spine of rabbits which were treated with lower intensity ultrasound.

Methods: Forty 12-month-old rabbits were made to be the models of bone graft in post-lateral between two homonymy processus transverses in lumbar, and divided into treatment group (B) and control group (A) randomly. Twenty rabbits of treatment group were treated with lower intensity ultrasound, killed after six weeks, and took radiological examination, measured indexs of biomechanics.

[Case-clinical studies on three different intervertebral fusion with bone graft and internal fixation in the treatment of cervical spondylotic myelopathy].

Objective: To evaluate the therapeutic effects of three different intervertebral fusion with bone graft and internal fixation in the treatment of cervical spondylotic myelopathy.

Methods: In the retrospective study, 83 patients (38 males and 45 females, with an average age of 69 years) with cervical spondylotic myelopathy were divided into three groups. The patients in three groups were treated by autogenous iliac bone grafting (Robingson grafting) with anterior cervical plate-screw fixation, Pyramesh with anterior cervical plate-screw fixation and BAK fixation respectively.

[A biomechanical evaluation of the sacroiliac anatomy type bar-plate internal fixation system].

Objective: To evaluate the biomechanical personality of the sacroiliac anatomy type Bar-plate system (SABP), which was of fixation usage to the fracture or dislocation of the sacroliliac joint.

Methods: Twenty fresh and freeze cadaver pelvises were prepared with pelvic fracture model,compared with different internal fixation systems such as Galveston technique, transiliac rod fixation, reconstruction plate and sacroiliac joint screws using experimental stress analysis methods,and then the stability of the pelvic was obtained and evaluated.

Results: Using new SABP system to treat pelvic sacroiliac joint fracture and dislocation was higher 10%, 11%, 16%, 21% in the strength; more 12%, 14%, 21%, 31% in rigidity; less 13%, 14%, 22%, 25% in straining;less 10%, 12%, 16%, 20% in shifting than the Galveston technique, transiliac rod fixation, reconstruction plate and sacroiliac joint screws, with remarkable statistic difference (P < 0.