Cervical tuberculosis associated with cervical pain and neurologic deficit: a case report and literature review.

Background Context: Isolated tuberculosis (TB) of posterior elements of the cervical spine is extremely rare. Only few cases are reported in literature, but none describe isolated spinous process and laminae involvement without TB in any other part of the body.

Purpose: To report a case of isolated TB involvement of the spinous process and right laminae of C2 combined with atlantoaxial luxation.

Total knee arthroplasty treatment of rheumatoid arthritis with severe versus moderate flexion contracture.

Background: This study aims to explore the technique of soft tissue balance and joint tension maintenance in total knee arthroplasty (TKA) for the rheumatoid arthritis (RA) patients with flexion contracture of the knee.

Methods: This retrospective study reviewed flexion contracture deformity of RA patients who underwent primary TKA and ligament and soft tissue balancing. Based on the flexion contracture deformity, the remaining 76 patients available for analysis were divided into two groups, i.

[Comparative analysis of the clinical characteristics of orthopedic inpatients in Lushan and Wenchuan earthquakes].

Objective: To systematically analyze and compare the clinical characteristics of orthopedic inpatients in Lushan and Wenchuan earthquake, so as to provide useful references for future earthquakes injury rescue.

Methods: Based on the orthopedic inpatients in Lushan and Wenchuan earthquakes, the data of the age, gender, injury causes, body injured parts and speed of transport were classified and compared.

Results: The duration of patients admitted to hospital lasted long and the peak appeared late in Wenchuan earthquake, which is totally opposed to Lushan earthquake.

[Novel artificial lamina for prevention of epidural adhesions after posterior cervical laminectomy].

Objective: To evaluate the application of artificial lamina of multi-amino-acid copolymer (MAACP)/nano-hydroxyapatite (n-HA) in prevention of epidural adhesion and compression of scar tissue after posterior cervical laminectomy.

Methods: Fifteen 2-year-old male goats [weighing, (30 +/- 2) kg] were randomly divided into experimental group (n=9) and control group (n=6). In the experimental group, C4 laminectomy was performed, followed by MAACP/n-HA artificial lamina implantations; in the control group, only C4 laminectomy was performed.

Novel biodegradable lamina for lamina repair and reconstruction.

Background Context: Posterior laminectomy is an effective spinal surgical procedure. The adhesion of postoperative scar tissue to surgically exposed dura and, occasionally, to nerve roots can cause failed back surgery syndrome. The establishment of a barrier between scar tissue and dura that is made of hard material may prevent scar adhesions.

Effects of mechanical loading on the degradability and mechanical properties of the nanocalcium-deficient hydroxyapatite-multi(amino acid) copolymer composite membrane tube for guided bone regeneration.

Background And Methods: Guided bone regeneration (GBR) is a new treatment for bone defects, and the property of membrane is critical to the success of GBR. This study focuses on a novel membrane tube for GBR, which was prepared by a nanocalcium-deficient hydroxyapatite-multi(amino acid) copolymer (n-CDHA-MAC) composite. The biomechanical strength and degradability of this membrane tube under mechanical loading after immersion in phosphate-buffered solution were investigated to evaluate the effects of mechanical loading on the membrane tube.

Meta-analysis of temporary versus no clamping in TKA.

Use of closed drainage systems after total knee arthroplasty (TKA) is a routine practice. Currently, a debate exists regarding whether temporary or no clamping is optimal. A systematic review of the English literature was conducted, and randomized controlled trials comparing all forms of temporary or no clamping drainage were included.

[Clinical efficacy and serum cobalt, chromium metal ion concentrations after total hip arthroplasty with three different hard-on-hard bearings].

Objective: To compare the clinical efficacy and serum concentrations of cobalt, chromium metal ion in three different hard-on-hard bearings after total hip arthroplasty at 2-years postoperatively.

Methods: Ninety (90) THA patients were divided into ceramic-on-ceramic (COC), ceramic-on-metal (COM), metal-on-metal (MOM) group (n = 30 in each group). At preoperative and 3, 6, 12, 24 months postoperative 5 time points, serum concentrations of cobalt and chromium metal ion were measured, Harris hip score was evaluated, X-rays and color doppler ultrasound examination of the ipsilateral hip also were observed.

Functional outcome of en bloc resection and osteoarticular allograft reconstruction with locking compression plate for giant cell tumor of the distal radius.

Background: Giant cell tumors of the distal radius at Campanacci grade III are particularly challenging to treat. We have treated 15 cases of giant cell tumor of the distal radius by en bloc excision and osteoarticular allograft reconstruction with locking compression plate (LCP). The purpose of this study was to assess the intermediate outcomes of all patients treated with this surgery.

[Comparison of screw' inserting angle through the 11th and 12th rib anterior approaches for L1 burst fracture].

Objective: To compare screw's inserting angle through the 11th and 12th rib in treating L1 burst fracture, explore effects on inserting screw and postoperative angle.

Methods: From October 2007 to October 2010, 108 patients with L1 brust fracture treated through anterior approach were analyzed,including 68 males and 40 females, aged from 21 to 64 years (mean 38.22 years).

Changes in bone mineral density of the acetabulum and proximal femur after total hip resurfacing arthroplasty.

Our aim was to investigate the changes in bone mineral density (BMD) of acetabulum and proximal femur after total hip resurfacing arthroplasty. A comparative study was carried out on 51 hips in 48 patients. Group A consisted of 25 patients (26 hips) who had undergone total hip resurfacing and group B consisted of 23 patients (25 hips) who had had large-diameter metal-on-metal total hip arthroplasty (THA).

Management of limb fractures in a teaching hospital: comparison between Wenchuan and Yushu earthquakes.

Objective: To comparatively analyze the medical records of patients with limb fractures as well as rescue strategy in Wenchuan and Yushu earthquakes so as to provide references for post-earthquake rescue.

Methods: We retrospectively investigated 944 patients sustaining limb fractures, including 891 in Wenchuan earthquake and 53 in Yushu earthquake, who were admitted to West China Hospital (WCH) of Sichuan University.

Results: In Wenchuan earthquake, WCH met its three peaks of limb fracture patients influx, on post-earthquake day (PED) 2, 8 and 14 respectively.

Infectious complications in patients with crush syndrome following the Wenchuan earthquake.

Objective: To analyze the results of clinical and bacteriological examinations in patients with crush syndrome who suffered infectious complications after an earthquake in Sichuan, China.

Methods: A total of 313 bacteriological samples among 147 patients with crush syndrome were collected. Infectious complications, results of microbiological examinations, potential risk factors of infection and mortality were analyzed statistically.

[Short-term effectiveness of nano-hydroxyapatite/polyamide-66 intervertebral cage for lumbar interbody fusion in patients with lower lumbar degenerative diseases].

Objective: To evaluate the short-term effectiveness of nano-hydroxyapatite/polyamide-66 (n-HA/PA66) intervertebral cage for lumbar interbody fusion in the patients with lower lumbar degenerative diseases.

Methods: Between January and October 2011, 20 patients with lower lumbar degenerative diseases underwent transforaminal lumbar interbody fusion with n-HA/PA66 intervertebral cage. There were 8 males and 12 females, aged 22-80 years (mean, 51 years).

In vivo kinematics comparison of fixed- and mobile-bearing total knee arthroplasty during deep knee bending motion.

Purpose: The in vivo kinematics of fixed-bearing and mobile-bearing total knee prostheses remains unclear, particularly for knee flexion over 120°. The purpose of this study was to compare the in vivo kinematics of fixed-bearing and mobile-bearing posterior-stabilized prosthesis during deep knee bending with knee flexion exceeding 120° under weight-bearing conditions.

Methods: In vivo kinematics was analysed for 20 patients implanted with either a fixed-bearing posterior-stabilized or mobile-bearing posterior-stabilized prosthesis.

Clinical features of Kashin-Beck disease in adults younger than 50 years of age during a low incidence period: severe elbow and knee lesions.

More than one million people are affected by Kashin-Beck disease (KBD) in a limited endemic area. However, few studies focused on the clinical features of adult KBD patients. The aim of this study was to investigate the clinical features of adult KBD patients who were younger than 50 years of age during a low incidence period.

Application triangular osteosynthesis for vertical unstable sacral fractures.

Purpose: The aim of this study was to explore the operative technique and effectiveness of triangular osteosynthesis for vertically unstable sacral fractures.

Methods: From January 2009 to December 2010, 25 vertical unstable sacral fractures in 22 patients were treated with triangular osteosynthesis using the combination of universal spine system and iliosacral screw in our institution. Patients were followed up prospectively with routine post-operation visits for clinical and radiographic examination.

[Acetabulum reinforcement ring with allograft bone for reconstructing acetabular defects in hip revision].

Objective: To evaluate the effectiveness of acetabulum reinforcement ring (Cage) with allograft bone for reconstructing acetabular defects in hip revision.

Methods: Between February 2006 and August 2010, 14 patients (14 hips) with serious acetabular bone defects after total hip arthroplasty underwent acetabular reconstruction by using Cage with allograft bone. There were 6 males and 8 females with a mean age of 59.

Meta-analysis comparing total hip arthroplasty with hemiarthroplasty in the treatment of displaced femoral neck fractures in patients over 70 years old.

Objective: Total hip arthroplasty (THA) and hemiarthroplasty (HA) are effective methods currently used to treat femoral neck fracture in elderly patients, but the two options remain controversial in patients over 70 years old. The main purpose of our study was to determine whether THA or HA is a superior treatment of femoral fractures involving a displaced neck in patients who are over 70 years of age.

Methods: A computer-based online search of Medline (1970-2011), PubMed (1977-2011), and the Cochrane Central Register of Controlled Trials (2002-2011) was conducted.

[Repairing bone defect with nano-hydroxyapatite and polyamide 66 composite after giant cell tumor operations].

Objective: To evaluate the clinical effectiveness and safety of using granular type nano-hydroxyapatite and polyamide 66 (n-HA/PA66) composite in repairing bone defects caused by giant cell tumors.

Methods: 48 patients with giant cell tumors, who underwent lesion curettage, inactivation and cavities fill-in with granular type n-HA/PA66 from December 2007 to May 2011, were followed up. Routine blood tests, liver and kidney functions, serum calcium and phosphorus, and immunologic parameters were examined before and after the surgeries.