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Biomedical subjects

K F Schlegel

Publications and source records attributed to K F Schlegel.

At least 19 recordsLinked to original sources
PubMed1990

[An early follow-up of the mecring cup in total hip arthroplasty].

41 non-cement total hip arthroplasties with the Mecring cup are reported in this paper. The follow-up results in an average of 14 months showed that this operation relieved the hip pain and improved the functional capacity and the motion of the hip. 80.5% of the reported hips gained excellent or good results. Because the cup was firm on the acetabulum with the thread, the defect of bone was smaller and the cup revision was easier than others, it is applicable not only for the elderly but also for younger patients. The relationship between the hip function and cup position was observed and it suggested that the correct abduction angle of the cup should be 40-50 degrees and the anteversion angle 5-20 degrees. The postoperative complications were dislocation and ectopic ossification.

Adult↗
PubMed1989

Long-term results of the Girdlestone hip.

The Girdlestone hip is a possible alternative in cases where reconstruction and reimplantation appear hopeless. Only a minority of the 22 patients we followed for up to 16 years have had results ranging from good to satisfactory.

Aged↗
PubMed1988

Orthopaedic diseases among transport workers.

Material handling tasks result in high load on the skeletal system. Long-term employment in transportation jobs may therefore cause a high frequency of orthopaedic diseases, particularly in the spinal region. An epidemiological study was performed on employees from a large company in order to test this hypothesis. The medical history of 249 male transport workers was examined by means of statistical analysis of the orthopaedic diseases documented in the record file of their company's health service. For purposes of comparison, the same data evaluation was performed for an age-matched reference group consisting of 267 persons chosen randomly from among the male employees in the same company. The proportion of persons with orthopaedic diseases amounts to 77.1% among the transport workers and 62.9% among the reference persons. It is consequently 1.22 times higher for the transport workers than for the reference persons ("rate ratio RR" = 1.22). The greatest part of all orthopaedic diseases affects the spine. Within the spine, the lumbar region is the most frequently damaged. Both for the totality of all spinal sections as well as for diseases of particular spinal sections (cervical, thoracic, lumbar spine), the proportion of the transport workers with diseases is higher than that of the reference persons (RR between 1.20 and 1.36). The proportion of persons with spinal diseases increases with age in both groups. There is no observable difference between the groups with regard to the frequency of persons with degenerative diseases.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

[Rehabilitation].

When serious injuries of the soft tissue and bone of the distal crus are not totally cured, orthesis and walking-sticks may bring relief in rehabilitation. Defects after recovery seldom need to be treated by orthesis or orthopaedic shoes. In most cases orthopedic additives to normal shoes can compensate malposition of the bone or lost function of the joint.

Ankle Injuries↗
PubMed1986

[Significance of diskography and contrast medium/enzyme interaction].

The introduction and routine usage of nucleolysis in treatment of lumbar disc disease has led to recognition of the importance of discography. In addition to confirmation and documentation of needle placement, discography is useful for diagnosis and exclusion of contraindications to nucleolysis such as escape of enzyme to nerve sheath or vascular system. Gross leakage of radiopaque material indicates probable communication to nervous structures. Possible interaction of enzyme and radiopaque were examined.

Chymopapain↗
PubMed1985

The biomechanics of posterior lumbar interbody fusion (PLIF) in spondylolisthesis.

A biomechanic analysis of the lower lumbar segments leads to the recommendation that during posterior lumbar interbody fusion it is desirable to preserve the dorsal structures, particularly of the facet joints. The area of the interbody graft should cover an area as large as possible in order to attain the benefit of the compression forces through the tension of the anterior longitudinal ligament. Preservation of the midline structures or application of a tension clamp to add dorsal tension aids bony fusion. Salvage operations in patients with previously excised posterior elements require the addition of dorsal or dorsolateral fusion to PLIF.

Biomechanical Phenomena↗
PubMed1980

[Elongation of the femur in congenital defect (author's transl)].

The various forms of congenital abnormality of the femur usually require combined conservative and operative procedures over a long period of time. Operative treatment depends essentially on the morphological findings. The literature is discussed. The authors present a case in whom the pseudoarthrosis can be utilised to obtain femoral lengthening and the operative detail is discussed.

Adolescent↗
PubMed1979

[Congenital femoral defect (author's transl)].

The various forms of congenital femoral defect are discussed according to the classification by Blauth, basing on own observations made by the authors. Choice of therapy is mainly determined by the morphological findings, preference being given to long-time conservative therapy for the controlled promotion of growth. The article comments on the indication and performance of supplementary operative intervention.

Adolescent↗
PubMed1978

[On Dwyer's scoliosis operation using memory alloy wire (author's transl)].

In Dwyer's spinal column correction a titanium cable is stretched from vertebra to vertebra by a special clamp and secured to each vertebra with screws and clips. It is suggested to replace the titanium wire with wire consisting of the memory alloy NiTi. This will permit the prestretched wire to be tensioned by heating it to 60 deg C after it has been fixed at its ends in the vertebrae. The functional principle of the NiTi memory wire was demonstrated in an experiment carried out on a plastic model. This consists of 8 plastic vertebrae with 30 mm sides which are connected by interposed wedge-shaped soft rubber discs, giving the model a curved shape. Memory wire prestretched by 7% is led through eylets on the convex side and fixed at the ends. On being heated (electrically in this experiment for the sake of simplicity), the wire shortens, righting the model so that it assumes a straight shape. The authors also describe in detail the manufacture of the alloy, i.e. the melting and shaping operations, as well as the properties of the material, that is, the stress-strain and strain-temperature relationships and the transformation temperatures, as well as mechanical problems.

Alloys↗