PubMed Health⌕ Search

Biomedical subjects

J C Mulier

Publications and source records attributed to J C Mulier.

At least 55 records · Page 3Linked to original sources
PubMed1977

Microscopic fracture aspects of impact tested human bones.

The fracture aspects of impact twisted human femurs and tibias have been studied in their wet condition. The main tool used to correlate fracture behaviour with bone structure was the scanning electron microscope. Supplementary data were obtained from macroscopic fracture pattern analyses and stress coat experiments on slowly tested dried bone. The interest of the data reported concerns two major points. Firstly the analysis of the fractographic results leads to the conclusion that the fracture has presumably been initiated by shearing parallel with the torsion axis. The fracture propagates along so called spiral and oblique fracture lines. Secondly, the correlation of the macroscopic fracture pattern with microscopic fracture aspects indicates that the fracture is initiated along the cement lines, which can be considered as the weak matrix in an osteon-cement lining composite. The fracture propagates along the cement lines as well as through osteons and lamellae. Throughout the impact fracture surfaces ductile and brittle fracture aspects were observed, although the brittle fracture mode was predominant during propagation.

Bone and Bones↗
PubMed1976

Haematogenous osteomyelitis of the patella. Report of three cases.

Three cases of osteomyelitis of the patella are reported. One presented as an acute septic arthritis and another developed a sterile arthritis despite antibiotics. The clinical signs, diagnosis and treatment are discussed. Treatment with rest and antibiotics failed to cure the disease. In all three cases a sequestrectomy was carried out resulting in healing of the affected patella and recovery of knee mobility.

Acute Disease↗
PubMed1976

Experimental study on the electrical impedance of bone and the effect of direct current on the healing of fractures.

An experimental study of the electrical impedance of cortical bone and medullary cavity and on the effect of a D.C. or a periodically interrupted D.C. on the healing of fractures in rabbits, suggests that the bone behaves as a capacitance of about 20 muF in parallel with a high D.C. resistance. Also a 10 muA periodically interrupted D.C. current stimulates osteogenesis.

Animals↗
PubMed1975

Fatigue fractures of the femoral component of Charnley and Charnley-Müller type total hip prostheses.

A survey is given of the mechanical failures of the femoral component of Charnley and Charnley-Müller type total hip prostheses. Fractographic analysis reveals that all the prostheses have broken by metal fatigue. A review of the clinical data has been combined with a metallurgical and a mechanical study in order to assess the reasons of the mechanical failures. The following conclusions have been reached. The prosthesis should be inserted in varus position with regard to the axis of the intramedullary canal, and the prosthesis should be made of an alloy with appreciably higher yield stress and fatigue strength than the alloys of the investigated broken Charnley and Charnley-Müller type prostheses.

Alloys↗
PubMedDate not supplied

Treatment of clubfoot by posterior capsulectomy.

Posterior capsulectomy is a complete excision of the posterior tibiotalar and talocalcaneal capsule with a release of the distal tibiofibular connection. The operation is proposed for a resistant or relapsed clubfoot, where remaining equinus is the major problem. A follow-up of 29 operations showed that the average talocalcaneal angle became normal in the AP and lateral views. The best results were obtained with long postoperative cast immobilization, i.e. 6 months.

Achilles Tendon↗
PubMedDate not supplied

Patellar tendinitis (jumper's knee).

A jumper's knee is an overload lesion of patellar or quadriceps tendon near its insertion at the lower or upper pole of the patella. If conservative treatment fails, an operation can be performed in Phase 3 where disabling symptoms, are present. The necrotic tissue in the patellar tendon is excised. The early results of this surgery are encouraging.

Humans↗
PubMedDate not supplied

Chronic leg pain in athletes due to a recurrent compartment syndrome.

A series of 29 patients, all engaged in sports activity on a regular basis, suffering from recurrent compartmental syndrome, is reported. The syndrome is not restricted only to long distance runners but to athletes involved in a variety of sports activities (soccer, volleyball, cycle racing, gymnastics, judo, physical education, and long distance running). Although most patients presented activity-related leg pain, some patients mainly complained of ankle weakness and recurrent ankle distortions at fatigue. The wick catheter technique proved to be most useful to determine which compartments were involved. The severity of clinical symptoms correlated highly with the anomalies of the tissue pressure measurements. The predominance of deep posterior compartment and multiple compartment involvement are in contrast with most previous reports. Conservative treatment was unsuccessful in every patient, whereas surgical decompression of the involved compartments yielded favorable results in those cases where all the involved compartments were released.

Adult↗
PubMedDate not supplied

Recurrent dislocation of the peroneal tendons. Results of rerouting the tendons under the calcaneofibular ligament.

Nine patients (11 cases) with recurrent dislocation of the peroneal tendons who were treated by surgically rerouting the tendons under the calcaneofibular ligament were reviewed. Mean follow-up time was 30.5 months. An excellent or good result was obtained in all cases. This operative technique was previously described in 1975, by Sarmiento and Wolf, in a case report.

Adult↗
PubMedDate not supplied

Adductor tendinitis and musculus rectus abdominis tendopathy.

Groin injuries are becoming more common today in soccer. Conservative treatment consisting of rest, physiotherapy, and medication yields favorable results in only 38% of the long-standing lesions. Operative treatment is indicated in selected cases. Better knowledge of the underlying pathology and a more accurate initial conservative treatment directed to the ethiopathogenesis could solve many of the problems. However, in our experience a simple subcutaneous adductor tenotomy and/or a rectus abdominis tenotomy in combination with a fasciaplasty was done successfully in 75 of 81 patients. There was no loss of power in this group of patients as measured and compared with a control group.

Abdominal Muscles↗