[Research progress on factors of shoulder stiffness after rotator cuff tear repair].

Rotator cuff tear is a common shoulder injury in daily work and sports activities. Arthroscopic repair is the most widely used method for rotator cuff tears, and the postoperative prognosis is good. However, there are still a series of postoperative complications that affect the therapeutic effect and patient satisfaction, such as postoperative pain, infection, retear, shoulder stiffness, etc.

[Arthroscopic surgery for injuries to the popliteal tendon area of the lateral meniscus].

Objective: To investigate the mid-term effect and complications of arthroscopic popliteal tendon suture in the treatment of lateral meniscus injury.

Methods: From January 2016 to December 2020, the data of 57 patients with lateral meniscus popliteal tendon injury treated by arthroscopic popliteal tendon suture fixation were retrospectively analyzed, including 35 males and 22 females, aged from 18 to 47 years old with an average of (32.9±7.

[Progress in arthroscopic surgery for injury of superior labrum anterior posterior of shoulder joint].

Superior labrum anterior posterior (SLAP) injury is a major challenge for orthopedic surgeons, due to the poor healing ability of the injured labrum. Although arthroscopic surgery is the gold standard for the treatment of SLAP injury, there are still disputes about the adaptation of different surgical techniques, the choice of anchors during operation, knotted or knotless anchors, and fixation methods. The authors believe that arthroscopic repair of SLAP lesions is effective for young patients with intact glenoid labrum(<35 years old) or with extensive activity, where single and knotless anchor is preferred.

[Arthroscopic subscapularis augmentation for the treatment of recurrent dislocation of shoulder with severe glenoid injury].

Objective: To investigate the method and clinical effects of the treatment of recurrent shoulder dislocation with severe glenoid injury by arthroscopic subscapularis augmentation.

Methods: From March 2019 to August 2020, 16 patients with recurrent dislocation of shoulder with severe glenoid injury underwent arthroscopic subscapularis augmentation, including 10 males and 6 females, aged from 18 to 50 years old with an average of (29.06±10.

[Research progress of graft application in promoting rotator cuff tendon-bone healing].

The incidence of re-tearing after rotator cuff repair is very high. The main reason is that the tendon-osseous junction after the operation is scar healed. In response to this problem, research in recent years has focused on the application of grafts, including cell transplantation, periosteum transplantation, cartilage transplantation, and biosynthetic transplantation.

[Comparative study on arthroscopic double posterior medial approach versus open surgery for acute simple posterior cruciate ligament tibial avulsion fracture].

Objective: To compare difference in clnical efficacy between arthroscopic double posterior internal approach and incisional surgery for acute simple posterior cruciate ligament tibial avulsion fractures.

Methods: Totally 52 patients with acute simple posterior cruciate ligament tibial avulsion fractures treated from June 2016 to June 2020 were retrospectively analyzed and divided into two groups according to different surgical protocols, 27 patients in arthroscopic group were treated with arthroscopic double posterior internal approach, including 16 males and 11 females, aged from 19 to 52 years old, with an average age of (34.9±9.

[Early efficacy analysis on arthroscopic autologous osteochondral grafting in the treatment of recurrent anterior shoulder dislocation].

Objective: To investigate the early efficacy of arthroscopic autologous osteochondral grafting in the treatment of recurrent anterior shoulder dislocation.

Methods: From January 2019 to January 2021, 17 patients with recurrent anterior dislocation of shoulder who underwent arthroscopic autologous osteochondral grafting were selected, including 12 males and 5 females, ranging in age from 17 to 55 years old, with a mean of (32.88±12.

[Suture technique for rotator cuff tears' repair under arthroscopic].

Shoulder arthroscopic as a conventional method usually is applied to repair rotator cuff tears. In clinical, plenty single-row, double-row and transosseous tunnels suture technique are performed, but the ideal suture technique for rotator cuff repair is not found. Compared with single-row, double-row has better strength in biomechanics property.

[Research advance in surface modification of titanium alloys with chitosan].

Titanium alloy has good biological properties and is commonly used in orthopedics, but its bone integrity and antibacterial properties are poor, so surface modification is needed to make up for its shortcomings. Chitosan has good biocompatibility and film forming ability, and can be used as a carrier to introduce the target drug to the surface of titanium alloy, which can effectively improve the biological properties of titanium alloy materials and increase its application range. In this paper, the related research of chitosan surface modified titanium alloy materials in recent years is summarized.

[Progress on effect of osteoporosis on rotator cuff repair].

The rate of rotator cuff injury repair and retear is high in elderly patients due to the combination of different degrees of osteoporosis. To solve this problem, many surgeons try to reduce retear rate of rotator cuff injuries in these patients by increasing the initial fixation strength of anchors and changing local bone conditions. The rapid advances of tissue engineering have made it possible to use growth factors as an aid.

[Progress on improving tendon-to-bone healing for the enthesis of rotator cuff].

Rotator cuff repair is a common treatment for rotator cuff tear, which could effectively relieve shoulder pain and improve shoulder movement, and the incidence of rotator cuff retear after rotator cuff repair is still high. The main reason is poor tendon-bone healing in rotator cuff enthesis after rotator cuff repair and could not recover the original histological structure and biomechanical properties. Therefore, the key to solve the problem is how to effectively improve the healing of tendon bone at the end of rotator cuff.

[Clinical observation of high tibial osteotomy for knee osteoarthritis:10 years follow-up].

Objective: To explore long-term following-up clinical effects of lateral closed high tibial osteotomy for the treatment of knee osteoarthritis.

Methods: Twenty patients with medial unicompartmental knee osteoarthritis were treated with lateral closed high tibial osteotomy and screw fixation from June 2005 to December 2015. Among them, including 17 females and 3 males, aged from 43 to 76 years old with an average of (57.

[Follow-up study on autogenous osteochondral transplantation for cartilage defect of knee joint].

Objective: To evaluate clinical effect of autologous osteochondral transplantation in treating localized knee cartilage defects.

Methods: Fifteen patients with knee cartilage defects were treated by autologous osteochondral transplantation from January 2007 to January 2008, including 8 females and 7 males, aged from 23 to 45 years old. Preoperative and postoperative KSS score at 10 years were compared.

[Reconstruction of complex proximal tibial defects using the long-stem tibial component combined with metallic wedge].

Objective: To investigate results of total knee arthroplasty using the long-stem tibial component combined with metallic wedge of knee prosthesis for the treatment of proximal defects.

Methods: From January 2011 to May 2013, 10 patients (11 knees) were treated with total knee arthroplasties using the long-stem tibial component with metallic tibial wedge of knee prosthesis. All the patients were female and the average age was 67 years old (ranged, 60 to 77 years old).

The offset of the tibia plateau of osteoarthritis patients: a single-center study.

Component position and good fixation are important factors determining the success of a primary or revision total knee arthroplasty (TKA). The aim of this study was to measure the anatomic features of the tibial plateau and to assess variations in the offset of the tibial shaft from the tibial plateau in osteoarthritis (OA) patients. Computed tomography (CT) scan results were obtained from 126 knees of 121 OA patients (72 female, 49 male) with an average age of 65 ± 7 years.

Does Arthroplasty Provide Better Outcomes Than Internal Fixation At Mid- and Long-term Followup? A Meta-analysis.

Background: Arthroplasty has been shown to be superior regarding low risk of reoperation and better function score to internal fixation for treatment of displaced femoral neck fractures at short-term followup. However, there are unanswered questions regarding the efficacy of arthroplasty in the longer term compared with internal fixation.

Questions/purposes: We performed a meta-analysis comparing arthroplasty (hemiarthroplasty or THA) with internal fixation in patients with displaced femoral neck fractures with respect to (1) mortality, (2) reoperation, (3) functional recovery, and (4) complications, including only randomized trials with a minimum of 4 years followup.

[Treatment of tibial intercondylar eminence fracture under arthroscopy through patellofemoral joint space].

Objective: To evaluate the clinical outcome of arthroscopy techniques for the treatment of tibial intercondylar eminence fractures through patellofemoral joint space.

Methods: From September 2008 to September 2012,45 patients (32 males, 13 females; ranging in age from 15 to 22 years old) with intercondylar eminence fractures (29 left knees and 16 right knees) were treated with reduction and fixation through patellofemoral joint space under arthroscopy. All fractures were fresh fracture and were treated within 10 days after trauma.

[Reconstruciton of medial patellofemoral ligament (MPFL) for the treatment of recurrent patellar dislocation].

Objective: To evaluate the middle term effectiveness of medial patellofemoral ligament (MPFL) reconstruction for the treatment of recurrent patellar dislocation.

Methods: From February 2007 to January 2010, 65 patients including 6 males and 59 females with recurrent patellar dislocation received the MPFL reconstruction. The reconstruction was performed using ipsilateral semitendinosis tendon to restore the damaged MPFL.

[Study on the long-term effects of the quadratus femoris muscle pedicle bone graft with screw fixation for the treatment of femoral neck fractures in young adults].

Objective: To analyze the long-term effects of the quadratus femoris muscle pedicle bone graft with screw fixation for the treatment of femoral neck fractures in young adults.

Methods: From 2002 to 2008, 38 patients with femoral neck fractures were operated. There were 22 males and 16 females, with an average age of 40 years (ranged 25 to 60 years).