PubMed Health⌕ Search

Biomedical subjects

C Kenesi

Publications and source records attributed to C Kenesi.

53 records · Page 3Linked to original sources
PubMedDate not supplied

The "caviar" madreporic knee prosthesis.

The madreporic ("caviar") prosthesis is a hinged knee prosthesis that can be inserted without the use of cement. The surfaces of the intramedullary stems are constructed with contiguous spheres one mm in diameter. These spaces are filled by bone trabeculae and haversian bone, providing permanent biologic fixation. Experimental madreporic knee arthroplasties in dogs show that bone probes these surfaces and produces solid attachments. Histologically, the trabeculae remain separated from the metal by a fine layer of fibrous tissue. The method of insertion of the prosthesis is simple. Preparing the epiphyses before any bone resection avoids the possibility of rotational positioning errors. The form of the intramedullary stems offers good positioning in the frontal plane. The analysis of an initial series of 15 cases shows results that are far from outstanding. The 2 deaths, the 2 cases of sepsis, and the recuperation of only mediocre motion can be explained, at least in part, by the advanced age of the patients and the poor bone quality of the rheumatoid patients. Nevertheless, this type of prosthesis has 2 important advantages. It avoids the complications from the use of acrylic cement and allows for a revision operation for cases of failed surface replacement designs. Obviously further experimentation with noncemented designs will continue and definitive studies will be reported later.

Animals↗
PubMedDate not supplied

[Characterization of biomechanical behavior of the lumbosacral spine in dogs. Characteristics related to spondylosis and disk degeneration].

The in vitro and static biomechanical behaviour of vertebrae with spondylosis were compared with that of healthy vertebrae. In the dog, spondylosis predominates in the lombo-sacral spine which was chosen as an animal model for spontaneous spondylosis. Fourteen surgical specimens were take from German shepherd dogs which had been submitted to right and left lateral flexion, saggital flexion and dorsal flexion. Angular displacements were recorded with an analyser of spinal movement. Our results demonstrated diseased vertebrae have more flexibility than healthy vertebrae in the sagittal and frontal planes than but less so for dorsal flexion. In Addition, diseased vertebrae tend to move upward during lateral flexion. Exeresis of ligament and capsular structures has allowed us to demonstrate the importance of these structures in maintaining spine stability in the sagittal plane and in joint coaptation. Exeresis of the facet joints led to the demonstration of the role of these structures in the maintenance of spine stability in the transverse plane in cases of disc degeneration.

Animals↗