[Composition and Distribution Characteristics of Microplastics in Danjiangkou Reservoir and Its Tributaries].

Microplastic pollution is a hot topic in environmental science. To explore the microplastics in Danjiangkou Reservoir, a national first-class water source protection area, we studied their types, abundance, and material characteristics using density flotation and micro-Raman spectroscopy. The spatial distribution characteristics of microplastics were also revealed according to the hydrologic and hydrodynamic conditions of the reservoir.

Biomechanical study comparing a new combined rod-plate system with conventional dual-rod and plate systems.

Most anterior spinal instrumentation systems are designed as either a plate or dual-rod system and have corresponding limitations. Dual-rod designs may offer greater adjustability; however, this system also maintains a high profile and lacks a locking design. Plate systems are designed to be stiffer, but the fixed configuration is not adaptable to the variety of vertebral body shapes.

Modified technique using allograft-prosthetic composite in the distal femur after bone tumor resection.

Background: The purpose of this retrospective study was to analyze the results of treatment of bone tumor resection of the distal femur with the modified technique of allograft-prosthetic composite.

Methods: Twelve patients with distal femoral bone tumors were treated with deep-frozen cortical allograft struts and allograft-prosthesis composites. There were five males and seven females with a median age of 29.

Effects of a sliding plate on morphology of the epiphyseal plate in goat distal femur.

The aim of this study was to observe the effects of a sliding plate on the morphology of the epiphyseal plate in goat distal femur. Eighteen premature female goats were divided randomly into sliding plate, regular plate and control groups. Radiographic analysis and histological staining were performed to evaluate the development of epiphyseal plate at 4 and 8 weeks after surgery.

Anterior versus posterior approach in the treatment of chronic thoracolumbar fractures.

The purpose of this study was to compare the results of anterior approach vs posterior approach in the treatment of chronic thoracolumbar fractures. A total of 36 patients with chronic thoracolumbar fractures were divided into 2 groups. Group A was treated by an anterior approach and group B was treated by a posterior approach.

[Ulnar osteotomy and internal fixation for old anterior dislocation of radial head in children].

Objective: To evaluate the clinical results of ulnar osteotomy and internal fixation in treating old anterior dislocation of radial head in children.

Methods: From Jan.2004 to Jan.

Operative versus nonoperative management of Pipkin type-II fractures associated with posterior hip dislocation.

Little has been written on randomized, controlled studies of operative versus nonoperative management of Pipkin type-II fractures associated with posterior dislocation of the hip. It is difficult to validate the optimal management of these fractures. The goals of this study were to (1) evaluate the results of conservative and surgical treatment for Pipkin type-II fractures associated with posterior dislocation of the hip and supply the optimal management for these fractures and (2) identify whether the Smith-Petersen approach is a safe and reliable surgical approach for Pipkin type-II fractures.

Conservative versus surgical management of Pipkin type I fractures associated with posterior dislocation of the hip: a randomised controlled trial.

The aim of this study was to evaluate the long-term results of conservative and surgical fragment excision treatment in patients with Pipkin type 1 fractures of the femoral head associated with posterior dislocation of the hip by a randomised controlled trial. Sixteen patients were randomly divided into two groups: the conservative group was treated by closed reduction, and the surgical group was treated by closed reduction followed with fragment excision. Functional outcome was determined using the Thompson and Epstein score and the Merle d'Aubigne and Postel score.

[Tunnel enlargement after anterior cruciate ligament reconstruction with peroneus longus muscle combined with BMP and allogeneic bone].

Objective: To investigate the incidence and variation of tunnel enlargement after anterior cruciate ligament (ACL) reconstruction with peroneus longus muscle combined with BMP and allogeneic bone.

Methods: ACL reconstructions with peroneus longus muscle combined with BMP and allogeneic bone were performed in 18 patients (18 knees)in the study from March 2007 to July 2009. Among the patients,14 patients were male and 4 patients were female, ranging in age from 21 to 47 years, with an average of 35.

[Treatment of infected bone defect with one stage open cancellous bone grafting].

Objective: To explore the feasibility of the treatment of infected bone defect with one stage open cancellous bone grafting and summarize the key factors improving the curative effects.

Methods: Twelve cases of infected bone defects were reviewed, which involved 8 male and 4 female with an average age of 42 years (range, 22 to 68 years). The study consisted of 7 cases of calcaneal defects, 4 tibial defects and 1 femoral defect.

[Treatment of refracture in plate-screw fixation of femoral shaft with plate and xenogenic bony plate].

Objective: To evaluate curative effect of plate and xenogenic bony plate were applied in refracture in plate-screw fixation of femoral shaft.

Methods: Thirteen cases of refracture in plate-screw fixation of femoral shaft included 8 males and 5 females, average age was 31.2 years ranging from 14 to 57.

[Controlled clinical study of treatment of non-operation and surgical operation for scapular fracture].

Objective: To investigate the effect of treatment methods of non-operation and surgical operation for scapular fracture.

Methods: A retrospective analysis of 52 patients (male 37, female 15, ranging in age from 20 to 48 years, meanly 31 years)with scapular fractures was done. According to Hardegger classification: the scapular body fracture in 24 cases, the surgical neck fracture in 12 cases, the anatomical neck fracture in 3 cases, the glenoidal lip fracture in 6 cases, the scapular spine fracrure in 7 cases.

[Design and experimental study of an epiphyseal slide-traction plate].

Objective: To develop an epiphyseal slide-traction plate in child, which can supply the fracture a sufficient internal fixation, and will not restrain the growth of epiphyses. Animal experiments were carried out with the plates to compare the slide-traction with traditional plate.

Methods: Develop a slide-traction plate for the configuration of the femur condylus of children.

Bone splint technique and plating application in adolescent high-energy comminuted fracture of distal femur with bone defects.

Comminuted fracture of distal femur is a common lower limb injury from traffic accidents, especially from motor accidents. Routine dynamic condylar screw (DCS) or 95-degree condylar plate (CP) sometimes cannot solve the bone defect in the center of alignment and contralateral diaphysis for the reason of absent screw anchor point, especially for AO C2.2-2.

[Salvage of lower limb with long-time injury of popliteal artery].

Objective: To evaluate the rate of salvage of lower limb with long-time injury of popliteal artery.

Methods: Twenty-one patients with injury of popliteal artery were treated. The interval between injury and repair of artery ranged from 12 hrs to 48 hrs.