Safety of modified Stoppa approach for Ganz periacetabular osteotomy: A preliminary cadaveric study.

OBJECTIVE: The aim of this cadaveric study was to investigate the efficacy of the modified Stoppa approach in Ganz periacetabular osteotomy (PAO). METHODS: The Ganz PAO was performed on 10 hemipelvises with normal hips, from 5 cadavers using the modified Stoppa approach through the Pfannenstiel incision. All of the osteotomies were performed under fluoroscopic control and direct visualizing the osteotomy site from the same incision. After the osteotomy, the acetabulum was medialized and redirected anterolaterally, and fixed with 2 screws. The neurovascular structures and the joints were examined by dissecting the soft tissues after fixation of the osteotomies. Outcome parameters were center-edge (CE) angle, the distances between the osteotomy and anterior superior iliac spine (ASIS), and between the osteotomy and the sciatic notch, neurovascular and joint penetrations. RESULTS: After the osteotomy, the mean CE angle was improved from 19.8° to 25.2°, mean distance between the osteotomy and ASIS was 3.1 cm, and the mean distance between the osteotomy and the sciatic notch was 10.2 mm. The neurovascular structures and the joints were examined by dissecting the soft tissues after fixation of the osteotomies. No damage to the joint, surrounding arteries, veins or nerves was detected in any of the cadavers. CONCLUSIONS: Bilateral dysplastic hips can be treated with a 10 cm, cosmetically more acceptable incision in the same session using this approach. Quadrilateral surface of the acetabulum can be directly seen using this approach and the osteotomy can be safely performed.

Can chondral healing be improved following microfracture? The effect of adipocyte tissue derived stem cell therapy.

BACKGROUND: We aimed to investigate the effect of adipose tissue-derived mesenchymal stem cells (ADSCs) on chondral healing using the microfracture (MF) technique. METHODS: Thirty male rabbits were randomly divided into three groups. Standard cylindrical osteochondral defects (OCDs) were created in the weight-bearing areas of the medial condyles of all the right knees; the defects were four millimeters in diameter and two millimeters in depth. The control group (group A) was restricted to spontaneous healing. For group B, we performed MF with a 1.5-mm drill. For group C, we applied MF using the same method and then applied 3×10(6) ADSCs to the defect area. At eight weeks post-operation, the subjects were sacrificed, and the distal femoral joint surfaces were evaluated histopathologically for chondral healing. The samples were scored according to the International Cartilage Repair Society (ICRS) scale. RESULTS: The results for group C were significantly better than those for group A in terms of the surface properties (p=0.003). The matrix evaluation was better for group A than for group C (p=0.01). The cell distribution, cell viability and subchondral bone parameters were similar between the groups (p=0.198, p=0.387 and p=0.699). The cartilage mineralization parameter was better for group C than for group A (p=0.001). The signs of healing were better for group C than for group B, but the differences were not significant (p=0.185). CONCLUSIONS: Improvements with additional ADSC treatments were not statistically significant in cases in which ADSC treatment was compared with isolated MF treatment. CLINICAL RELEVANCE: Additional ADSCs treatment may have positive effect on chondral healing but it doesn't seem significant.

Does intra-articular fracture change the lubricant content of synovial fluid?

BACKGROUND: Lubrication function is impaired and the lubricant content of synovial fluid (SF) changes immediately after plateau tibia fractures. Here, we aimed to analyze the lubricant content of SF at chronic term following plateau tibia fracture. METHODS: Forty-eight surgically treated patients without joint incongruency (<2 mm displacement) were included in the study. Joint aspiration had been possible in 16 of the participants. However, sampling could be made from healthy knees in only ten of these patients. Twenty-six SF samples (16 injured knees, 10 healthy knees) were analyzed for concentrations of hyaluronic acid (HA), proteoglycan-4 (PRG4), TNF-α, IL-1ß, and IL-6. RESULTS: The group of experimental samples were obtained at a mean of 31 (12-66) months after injury from patients with a mean age of 45.1 (32-57) years. There were no relationships detected between biochemical analysis results and patient ages, sexes, postoperative time, and fracture type. After excluding six patients for whom we could not sample from their healthy knee, ten patients' values were compared with paired Wilcoxon signed rank test and no significant differences detected between the healthy and injured knee in terms of the SF concentrations of HA and PRG4 (p = 0.225 and 0.893, respectively). Similarly, there were no statistically significant differences in SF sample concentrations of TNF-α, IL-1ß, and IL-6 between healthy and injured knees. CONCLUSIONS: Despite acute changes, the long-term concentrations of HA and PRG4 were similar after plateau tibial fracture. We could not detect any concentration level differences between healthy knees and injured knees regarding HA and PRG4 in the long-term follow-up.

Apophyseal avulsion fracture of the anterior inferior iliac spine due to a simple bone cyst.

Apophyseal avulsion fractures of the anterior inferior iliac spine are rare; they are usually seen in adolescents as a result of sudden contraction of the rectus femoris muscle. Treatment is usually conservative, but surgical management may be necessary in certain circumstances. We present an unusual case of a 14-year-old male who was referred to our department for a suspicious pathological fracture of his right anterior inferior iliac spine; he was found to have an avulsion fracture of the anterior inferior iliac spine due to simple bone cyst. We discuss the treatment of this rare injury caused by a benign osseous tumour.

Pediatric transepiphyseal seperation and dislocation of the femoral head.

Pediatric hip fractures and dislocations are rare in practice and are related to high-energy trauma. The incidence of postoperative avascular necrosis is increasing, especially in the case of transepiphyseal fractures. Surgery is the most common form of treatment, and its timing is important for prognosis of the fracture. Patients and their families should be informed about the possibility of avascular necrosis and further complications related to the fracture.

A rare complication of tuberculous meningitis pediatric anterior glenohumeral instability.

Dislocation and instability of the shoulder joint are rare occurrences in childhood. Traumatic, infectious, congenital, and neuromuscular causes of pediatric recurrent shoulder dislocations are reported before. Central nervous system infection in infancy may be a reason for shoulder instability during childhood. This situation, which causes a disability for children, can be treated successfully with arthroscopic stabilization of the shoulder and postoperative effective rehabilitation protocols. Tuberculous meningitis may be a reason for neuromuscular shoulder instability. We describe a 12-year-old child with a recurrent anterior instability of the shoulder, which developed after tuberculous meningitis at 18 months of age. We applied arthroscopic treatment and stabilized the joint.

Floating shoulder: ipsilateral clavicle, scapular body and glenoid fracture. A case report.

ABSTRACT: We present a case of shoulder instability following a traffic accident. Allman Type I midshaft clavicle, Ideberg Type II glenoid and DeCloux Type I scapular body fractures were diagnosed following radiologic examination. There were no signs of ligamentous injury. Mechanical instability was noted at the shoulder due to breakage of the supportive bony skeleton. The patient was treated surgically with plate and screw fixation. Surgical fixation allowed early postoperative physiotherapy and rehabilitation. This rare injury and its treatment options are discussed in the light of current literature. KEY WORDS: floating shoulder, scapula, clavicle, glenoid, mechanical instability.