Search PubMed⌕ Search

Biomedical subjects

U Pfister

Publications and source records attributed to U Pfister.

At least 55 records · Page 3Linked to original sources
PubMed1984

[Fractures in benign bone cysts].

Etiology, clinical manifestations, roentgenographic appearance and histological variations of solitary and aneurysmatic bone cyst are reported. The classification of solitary bone cyst into active and inactive cysts is important therefore prognosis and treatment are different. The critical control of our patients with fractured solitary and aneurysmatic bone cysts since 1973 resulted in a very contenting management of treatment. Active solitary bone cysts, recurrent cysts, fractured cysts and large cysts close to joints are treated by segmental resection, interposing of ribs, homologous or autogenous cancellous bone graft and plate osteosynthesis. We never found recidives under this treatment. The only curettage of active solitary bone cyst frequently is accompanied by recidive and unsatisfying functional results. Reports of local corticoid injections in treatment of bone cysts should be furthermore controlled critical.

Adolescent↗
PubMed1983

[Biomechanical and histological studies following intramedullary nailing of the tibia].

With our experimental work we tried to answer some special mechanical and biological questions which occur in medullary nailing of the tibia. The deformation of the nail during insertion was measured by strain gauges. In addition resistance of isolated tibial segments against torsional moments was analyzed. Thus we were able to demonstrate the occurrence and the effectiveness of an elastic interlocking of the nail in the transverse and longitudinal tibial axis. By means of dying with disulphine-blue and labelling with fluorochromes the irritation of the cortical blood flow and the revascularisation procedure on the base of a centripetally directed intensive cortical remodelling could be figured out very well. The results are not only limited to the conditions of intramedullary nailing but allow further conclusions to the general physiology of cortical blood flow and bone healing.

Animals↗
PubMed1982

[Non unions of the humerus shaft (author's transl)].

The clinical evaluation of 121 cases of non union of the humerus shaft shows that 46 of these occurred after conservative and 75 after operative treatment. The main failures could be found after conservative treatment by traction methods. Operative treatment by intramedullary splinting did not achieve sufficient stability. The high rate of non unions after plate osteosynthesis is caused by basic technical faults in nearly all cases. The number of postoperative nerve palsy is remarkable. All cases could be healed by means of proper plate osteosynthesis after decortication combined with cancellous bone grafting in 12 atrophic non unions. The high rate of non unions of the humerus shaft gives occasion to reflect upon the correct indications for fracture treatment. From our point of view a more conservative attitude should be required.

Adolescent↗
PubMed1981

[Indications and technique of arthrodesis of the knee joint (author's transl)].

The indications of an arthrodesis of the knee joint have changed and seem to be rare in a century of total arthroplasty. However, even nowadays the arthrodesis of the knee joint is still carried out with good results in: postinfectious gonarthrosis, irreparable posttraumatic instability, Charcots knee, Neoplastic destructions in special cases, for patients with a severe painful and deforming arthrosis of any reason, which are too young for an arthroplasty and in a century of arthroplasty for all patients after failure of arthroplasty. Within a period of 11 years from 1969-1980, 105 patients underwent an arthrodesis of the knee joint at BG Unfallklinik Tübingen. Indications and technique are given, the value of an individual postoperative care is pointed out.

Adult↗
PubMed1980

[Surgical treatment results in radius head fractures (author's transl)].

The operative treatment of radius head fractures represents only one method. Indication for surgical treatment and the method (resection or reconstruction of the radius head) is elucidated based on 30 surgically treated radius head fractures. Postsurgical examinations show better results for the reconstruction method in the limitation of movement and post-traumatic arthrosis than the resection, even though the difference between them shows no significance regarding the small number of cases. Cubitus valgus or changes on the distal radioulnar joint after resection were not found. If there is indication for surgical treatment of a radius head fracture, one should consider using the reconstruction method first.

Adolescent↗
PubMed1980

[Locking of the intramedullary nail in the medullary cavity of the tibia (author's transl)].

Whether or not an effective locking of the medullary nail in transverse direction is achieved after medullary nailing of the tibia, is a moot point in literature. Researchers agree, however, that the essential locking of the nail occurs on the longitudinal axis of the nail. The authors conducted studies with strain gauges measuring the expansion and introduced together with the nail in order to obtain information on the elastic performance of the nail in transverse and longitudinal direction. The curves plotted from the data obtained, present a typical appearance. After the tibia has been properly reamed, a medullary nail of the AO is subjected to both elastic transverse compression as well as slight longitudinal bending after nailing. In case of excessive reaming the transverse elastic effect is only slight. If, on the other hand, reaming is not effected wide enough, the bone may burst open or the nail may undergo plastic deformation.

Biomechanical Phenomena↗
PubMed1980

[Influence of the treatment of fractures on the development of pseudoarthroses of the humerus shaft (author's transl)].

The evaluation of 98 pseudoarthroses of the shaft of the humerus showed that 42 of these occurred after conservative and 56 after surgical treatment of the original fracture. It appears that pseudoarthroses are caused in conservative treatment chiefly by the traction methods. Among the surgical methods, intramedullary nailing does not seem to bring about sufficient stabilization with a satisfactory measure of safety, whereas in the case of plate osteosynthesis, errors in respect of operation technique are mainly responsible for causing pseudoarthroses. All 98 pseudoarthroses returned to normal condition after proper plate osteosynthesis and, if necessary additional deposition of cancellous bone graft.

Adolescent↗
PubMed1979

[Valgus osteotomy in treatment of osteoarthrosis of hip (author's transl)].

The article reports on Bombelli's theory on the genesis of arthrosis of the hip. Clinical experience has shown that valgus and extension osteotomy is indicated in dysplasia arthrosis, in cystic changes and formation of osteophytes. Although the good clinical results cannot be accepted as a proof of the biomechanical deliberations, they do extend the range of indications pointing to surgery of the diseased hip joint performed for the purpose of preserving the femoral head.

Bone Plates↗
PubMed1976

[Stabilization of infected fractures and pseudarthroses (author's transl)].

A procedure following the principles of modern septic bone surgery permits the prospect of bone healing in infected fractures and pseudarthroses, even in cases which at first seem hopeless. In spite of primarily atypical conditions, an improvised procedure ought to be avoided as a rule. The possibilities of a stable fixation are indicated with reference to some exemplary cases. At the same time, the need for autologous spongiosaplasty in the treatment of infected fractures and pseudarthroses is pointed out.

Adult↗