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Biomedical subjects

C Burri

Publications and source records attributed to C Burri.

At least 91 records · Page 5Linked to original sources
PubMed1982

[Results of treatment of tumors and metastases of the pelvis and proximal femur].

A retrospective study of 293 primary tumors and 244 metastases of the pelvis and proximal femur allows the following conclusions. Benign tumors are treated by curettage whereas low-grade malignant tumors have to be resected "en bloc". In high-grade malignant pelvis tumors, total internal hemipelvectomy with replacement of half of the pelvis has been used with success. Metastases are treated by total hip prosthesis or a combination of bone cement and osteosynthesis. On the whole early lethality is low, local complications are acceptable and most of the patients are able to walk.

Adolescent↗
PubMed1982

[Load stability in relation to the osteosynthesis method, course and complications in open lower-leg fractures with severe soft tissue lesions ].

The external fixator ("fixateur externe") is today's method of choice in the treatment of lower leg fractures with severe damage to the soft parts. The various application techniques and angles of application of this device entail varying stability and are characterized by certain advantages and drawbacks. Basing on detailed biomechanical studies and experience with patients, the authors prefer the rectangular mode of application using Schanz screws. If the type of fracture allows, a combination of minimal osteosynthesis and external tensor is used; this can significantly enhance the stability. In 42 patients of a total of 56 during 1978-1980 with second-grade and third-grade open fractures of lower leg, combination with minimal osteosynthesis was effected (traction screw). Of 44 patients followed up, 19 achieved stability to load within an average period of 19.8 weeks. If there is no osseous bridging 10-12 weeks after initial treatment, additional measures such as spongiosaplasty and changeover to stable inner fixation with plates become necessary. Following plate osteosynthesis with additional spongiosaplasty, full load was permissible on the average 14 weeks after this procedure in 23 patients. The course was more complicated in the case of the 2 remaining patients; it took up to 45 weeks until full load became permissible.

Bone Plates↗
PubMed1982

[Complications at removal sites of autologous cancellous bone transplants].

1022 autologous bone transplants were performed at the University clinic of Ulm in the years 1971-1977. The cancellous bone deposits removed were localized in the anterior and posterior iliac crest, the trochanter major, the tibial head as well as the distal radius. Since some patients had postoperatively experienced difficulty in the healing of the cancellous bone removal sites, we decided to investigate these complications by means of questionnaires, clinical re-examinations as well as X-ray controls (3-9 years after removal). During the early postoperative phase (2 months), approximately one-fifth of the patients had complained about pain at the removal site. 3.1% had more or less pronounced hematomas in the scar regions, but surgical evacuation of the hematoma was necessary in only 0.28%. Additionally, 2 cases of infection as well as one femoral neck fracture following cancellous bone removal from the greater trochanter were observed. At the time of re-examination, performed 3-9 years after cancellous bone removal, only 3.9% of the patients complained of largely weather-influenced pains in the vicinity of the cutaneous scars. Sensibility disorders in the area innervated by the N. Cutaneous femoralis lateralis, were found in all those 7 patients who, in the course of cancellous bone removal from the iliac crest, had received skin incisions extending ventrally beyond the spina iliaca anterior superior. The X-ray controls showed more or less pronounced changes in the bone structure at the removal sites of cancellous bone deposits in nearly all patients, but correlation could only be determined between the radiological alterations at the anterior iliac crest donor site and the respective complaints of the patients.

Bone Diseases↗
PubMed1982

[Taurolin gel in treatment of osteitis (author's transl)].

Removal of septic foci in putrid infection of the bone is an important step in the treatment of post-traumatic osteitis. The methods employed so far, such as through-drainage and siphonage, as well as gentamycin-PMMA chains, have very obvious drawbacks although they have definitely achieved favourable results. Taurolin Gel , a preparation consisting of denatured collagen in combination with the chemotherapeutic Taurolin 4%, is theoretically capable of eliminating these drawbacks. Clinical application appeared justified on the basis of good results obtained with the drainage solution of Taurolin, as well as in the course of experiments. Results have been obtained mostly in a single application in 50 cases documented and followed up; these results were equivalent to those obtained by means of the other methods. In consideration of the advantages with regard to application and effect, the authors believe that testing of this substance on a larger scale should be recommended.

Anti-Infective Agents↗
PubMed1982

[Spinal tumors].

Explore the source record for details and available documents.

Bone Plates↗
PubMed1981

[Comparative investigations on the stability of fracture fixations with different fixateurs externes (author's transl)].

Short oblique fractures of the tibiae were stabilized with two-dimensional (frame spanner), three-dimensional and various V-shaped fixateurs externes, applied at the ventral-medial side. The stability of all these different types of fracture fixations was tested with and without an additional lag screw. Under a torsional load the stability of the area of osteotomy was measured. The three-dimensional fixateur externe and the V-shaped fixateur externe yielded the best results. The use of an additional lag screw produced a greater and significant (p less than 0,01) improvement.

Biomechanical Phenomena↗
PubMed1981

[Technique of the alloplastic ligament substitution with carbon fibres (author's transl)].

Chronic instabilities or remaining luxations of joints are not acceptable for an active human being. The desired result is often not achieved by surgical methods applying most different autologous and homologous materials. This is why our working group has been trying for several years to develop a more promising method using an alloplastic material in the form of carbon ligaments. Numerous mechanical, biological, biomechanical, and histological examinations showed that the implantation of woven carbon ligaments in man could be accepted. During the most recent years, we have effected 150 ligament grafts with this material and, in course of time, we have been able to modify and to ameliorate the operation techniques. Today we may state that the described operation methods using ligaments of carbon fibres in the sternoclavicular, acromioclavicular, knee and ankle joint can bring about favorable results with regard to their function and stability. Further improvements can probably be achieved by a careful examination of the results obtained hitherto which will possibly include another refinement of the operation technique. A definite evaluation of this method, however, will only be possible within several years, when clinical check-up examinations will be made.

Acromioclavicular Joint↗
PubMed1981

[Alloplastic grafting of ligaments with carbon-fibres (author's transl)].

During several years ligaments consisting of carbon-fibres have been tested in animal experiments. Recently this material was used in humans. Until today approximately 150 patients have been operated. The late results in 65 patients with instability in 66 joints are reported. Carbon-fibre-ligaments yielded good results, provided an expert surgical technic was applied and the follow-up care was optimal. Good results were achieved on the shoulder, the knee and the lateral ankle-joint. Initially there arose some problems due to technical difficulties. By using a modified surgical technic and improvements in the follow-up care still better results can be achieved. The present study is retrospective; a prospective study has been started.

Aftercare↗
PubMed1981

[Biomechanical examination of stress distribution in the femoral neck for varus-implanted and valgus-implanted cups (author's transl)].

Femoral neck fractures occur after cup-prosthesis implantation and inadequate trauma. By reaming the head the tension stress in the lateral tension banding system of the femoral neck is reduced. Therefore high unphysiological bending moments occur in the medial trabecular system, which resists only high pressure forces. Our investigations showed that the unfavourable change in the stress distribution in the femoral neck is worse for the varus- than for the valgus-implanted cup. This could be the cause for the femoral neck fractures after cup implantation and inadequate trauma.

Biomechanical Phenomena↗