Dual-crosslinked reduced graphene oxide/polyimide aerogels possessing regulable superelasticity, fatigue resistance, and rigidity for thermal insulation and flame retardant protection in harsh conditions.

Polyimide (PI) aerogels have various applications in aerospace, national defense, military industry, and rail transit equipment. This paper reports a series of ultra-lightweight, high elasticity, high strength, low thermal conductivity, and high flame retardant rGO/PI nanocomposite aerogels prepared by the ice templating method. The effects of freezing processes (unidirectional freezing and random freezing), chemical composition, and environmental temperature (-196-200 °C) on the morphology, mechanical, and thermal properties of the aerogels were systematically studied.

Novel dual: rod plate system for EOS improves vertebral wedging and permits spinal growth.

Background: To determine whether single-stage, growth-friendly instrumentation with a plate-rod spinal system (PRSS) can substantially correct the deformity of EOS at surgery and continue to rectify the deformity throughout the growth period.

Methods: An observational study of 35 children with EOS treated by PRSS between February 2000 and October 2010 during a mean follow-up of 72 months. The mean age at surgery was 7 years.

[Observation on maintenance of scoliosis curve correction and preservation of spinal mobility after removing plate-rod system for scoliosis].

Objective: To investigate the effect of removing the implanted plate-rod system for scoliosis (PRSS) on maintaining scoliosis curve correction and preserving spinal mobility in patients with scoliosis.

Methods: From June 1998 to February 2002, 119 cases of scoliosis were treated with the implant of PRSS, which was removed 26-68 months later (average 46.8 months).

[Biomechanical study and clinical application of distraction reduction fixation system for treating thoracolumbar vertebral fracture].

Objective: To investigate the biomechanical characteristics of self-developed distraction reduction fixation system (DRFS) and to evaluate its clinical effect on thoracolumbar vertebrate fracture.

Methods: Twelve fresh porcine spines were prepared for the biomechanical test. The stiffness of each intact specimen were recorded on forward bending (20 degrees), backward bending (10 degrees), lateral bending (30 degrees) and axial rotation (20 degrees), and then specimens of fracture dislocation were made by cuneiform osteotomy of L3 vertebral body and excision of posterior facet joints.

Operative treatment for separation of distal tibiofibular syndesmosis.

Objective: To study the influence of separation of distal tibiofibular syndesmosis on ankle joint and to compare various operative methods so as to find suitable stabilization for separated distal tibiofibular syndesmosis.

Methods: From July 1997 to July 2002, we treated 87 patients (64 males and 23 females, aged 18-54 years) with separation of distal tibiofibular syndesmosis, among whom, 79 were combined with fracture of malleolus. Manipulative reduction, internal fixation with cancellous screws and external fixation with plaster support were performed on 37 patients, fixation with plate and screws for fibular fracture and fixation with cancellous screws for distal tibiofibular syndesmosis on 34 patients, and repair of the distal tibiofibular ligaments with tendon of peroneus longus, reduction of the separated distal tibiofibular syndesmosis, and fixation with cancellous screws on 16 patients.

Surgical treatment of scoliosis caused by neurofibromatosis type 1.

Objective: To retrospectively analyze the relationship between curve types and clinical results in surgical treatment of scoliosis in patients with neurofibromatosis type 1 (NF-1).

Methods: Forty-five patients with scoliosis resulting from NF-1 were treated surgically from 1984 to 2002. Mean age at operation was 14.

[Biomechanical evaluation of stiffness of long-segment instrumented spine].

Objective: To test the changes of the stiffness of the intact, released, and instrumented spines in an in vitro porcine model.

Methods: Twelve porcine spines (12 segments each) were harvested for the biomechanical tests with Material Test System. Stiffness during flexion, extension, lateral bending, and axial rotation were recorded; then the specimen was released with intervertebral discs and the facet joints removed, followed by repeating the biomechanical tests for stiffness; and finally, a double-rod titanium construct was applied for internal fixation to each released spine and stiffness tests were repeated again.

[Surgical treatment of spine metastatic tumor].

Objective: To explore the value of surgical treatment on spine metastatic tumor.

Methods: 31 cases of spine metastatic tumor with severe pain or/and neurological deficit were selected and treated with various operative methods.

Results: Except for 4 cases, all the patients survived from 3 months to 7 years (average 17.

[Patellofemoral replacement for severe patellofemoral osteoarthritis: a 2-10 years follow-up study].

Objective: To evaluate the therapeutic effects of patellofemoral replacement for severe patellofemoral osteoarthritis.

Methods: Patellofemoral replacement was performed in 30 patients (36 knee joints) with severe patellofemoral osteoarthritis, among whom were 5 males and 25 females. The patients ranged in age from 36 to 74 years old (mean +/- s, 55.

[Complications associated with the technique of pedicle screw fixation].

Objective: To analyze the causes of the complications associated with the pedicle screw fixation during and after operation, as well as the methods for prevention and treatment.

Methods: From January 1988 to December 1999, 475 patients who underwent pedicle screw fixation for various spinal disorders were reviewed retrospectively with statistical analysis.

Results: Four hundred and twenty-eight patients (90.

Surgical treatment of metastatic spinal tumor.

Objectives: To evaluate the effect of surgical treatment on metastatic spinal tumor.

Methods: The results of surgical intervention for metastatic spinal tumor of 31 consecutive patients since October 1985 were reviewed.

Results: The average survival time was 17.

Anterior spinal fusion with TSRH instrumentation for scoliosis.

Objective: To introduce a new spinal internal fixation system, Texas Scottish Rite Hospital (TSRH), and to investigate its early clinical outcomes.

Methods: The preliminary clinical outcomes of 15 patients with thoracolumbar or lumbar scoliosis treated by anterior spinal fusion with TSRH instrumentation were studied retrospectively. Fourteen patients were diagnosed as idiopathic scoliosis and 1 as neuromuscular scoliosis.

Clinical application of the TRAFIX instrumentation in correcting scoliosis.

Objective: To evaluate the results of the TRAFIX instrumentation in correcting scoliosis.

Methods: Since October 1997, 47 patients with scoliosis received spinal fixation with the TRAFIX instrumentation at the Peking Union Medical College Hospital. The average age was 14.

[Surgical treatment of spinal myeloma, report of 19 cases].

Objectives: To discuss the indications for surgical procedures of spinal myeloma.

Methods: A retrospective analysis was made of the data of operation results of Nineteen patients with spinal myeloma, 13 males and 6 females, with the mean age of 45.1 (range 31 approximately 52).

[Treatment of infected total knee arthroplasty].

Objective: To investigate the treatment of infected total knee arthroplasty (TKA).

Methods: Between 1983 and 2000, 6 patients with infection after TKAs were treated, including 2 men and 4 women, aged on average 63 years (44 - 75 years). Initial knee arthroplasty was performed for osteoarthritis in 4 patients and for rheumatoid arthritis in 2 knees.