PubMed Health⌕ Search

Biomedical subjects

F W Hansen

Publications and source records attributed to F W Hansen.

7 recordsLinked to original sources
PubMed1978

Underside lesions of the meniscus.

A total of 180 menisectomies were performed with special attention to lesions located only on the underside of the menisci. Thirty-six lesions (20 per cent) were found with this location, all in the posterior part of the menisci. Half of these were atypical horizontal cleavage lesions. The clinical features of these lesions were compared with normal meniscal lesions and no differences could be demonstrated. The subjective results after meniscectomy for 35 underside lesions were 94 per cent good or excellent after an average follow-up period of 22.3 months. Meniscectomy is the treatment of choice for these lesions. It is emphasized that careful examination of the underside of the meniscus is necessary if a patient presents a clinical picture of meniscal lesion and no other lesions can be found.

Adult↗
PubMed1977

Tibial shaft fractures. A comparison of conservative treatment and internal fixation with conventional plates or AO compression plates.

Out of a series of 207 consecutive fractures of the tibial shaft, 102 were treated conservatively, 64 fractures were treated by AO compression plate osteosynthesis and 41 by internal fixation using Eggers or Lane plates. The choice of method was independent of the extent of soft tissue damage. A follow-up examination of 199 fractures, with a mean observation time of 3.4 years, revealed residual malalignment in 21 per cent of conservatively treated cases and in 8 per cent after conventional plate fixation, while the AO method resulted in anatomical restoration of the axis of the tibia in all cases. However, removal of the compression plates was followed by re-fractures, early and late, in 11 per cent. Implant failure occurred in 5 per cent of both types of plate fixation, and 3 per cent of the conservatively treated cases redislocated. Infection developed in 5 per cent of closed fractures and in 11 per cent of open fractures treated by operative means. Of the conservatively treated cases, only 3 per cent of the open fractures developed infection. The risk of infection following acute internal fixation is thus four times greater than with conservative treatment. AO compression plate fixation shortened the time of fracture healing considerably. The rate of non-union after conservative treatment was 6 per cent in closed and 21 per cent in open fractures. Similarly in conventional plate fixation there was non-union in 8 and 24 per cent, respectively. Non-union was not encountered after AO compression plate osteosynthesis. It is concluded that AO plate osteosynthesis is justified in the treatment of open tibial shaft fractures and also useful in closed fractures when conservative treatment does not lead to stable reduction with a good alignment.

Adolescent↗
PubMed1977

The Monk hip arthroplasty. Preliminary report on the uncemented standard Monk prosthesis.

The Monk hip prosthesis is a one-piece block prosthesis consisting of a metal femoral component with the head enclosed in a polyethylene cup. The standard type is fixed without cement. Most of the hip movements take place between the metal and the polyethylene cup. 104 Monk arthroplasties were performed. 95 hips in 84 patients have been available for regular examination and follow-up. The follow-up period was from 12 to 30 months, an average of 19 months. Out of the 95 cases, 72 were classified as excellent, 10 as good and 13 as unchanged. The results obtained during the first year were comparable to those obtained with the Ring prosthesis, but during the following 1 1/2 years eight revisions had to be performed. The main reason for the deterioration was loosening of the femoral component, probably because in the standard type it is too short and the neck has too great a varus inclination, resulting in a rather strong tilting force. Because no cement has been used the revisions have been quite easy to perform. Another reason for failure has been wear of the polyethylene cup, in one case with a massive foreign body reaction. In spite of a short follow-up period this report illustrates the failures due to the design of the prosthesis, and therefore an improved construction is now in use.

Adult↗