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Biomedical subjects

M Prymka

Publications and source records attributed to M Prymka.

24 records · Page 2Linked to original sources
PubMed1996

[Proprioceptive capacity of the knee joint area in patients after rupture of the anterior cruciate ligament].

In 30 healthy volunteers with clinically inconspicuous knee joints the proprioception of the knee joint was evaluated by an angle reproduction test. With the same set-up we documented the effect of an elastic knee bandage. We could not document any differences between the left and the right knee joint or between men and women, but at the mid-range of motion, proprioception was worse compared to the end range of motion. The applied elastic knee bandage significantly improved the position sense. Additionally 25 patients with an isolated rupture of the anterior cruciate ligament were evaluated. Fourteen patients were examined preoperatively 11 after operative ACL reconstruction. Preoperatively proprioception was significantly poorer than in the control group. We were able to show a positive influence of a knee bandage on the proprioception of the injured knee as well. Patients after ACL reconstruction showed no significantly better proprioception than the preoperative group.

Adult↗
PubMed1996

Proprioception of knee joints with a lesion of the medial meniscus.

We assessed knee-joint proprioception in 23 patients with an isolated lesion of the medial meniscus. Thirteen patients were tested prior to their arthroscopic operation, and 10 patients were examined after partial arthroscopic resection of the injured meniscus. As a control group we evaluated 30 healthy volunteers with clinically normal knee joints. For documentation of the proprioceptive capabilities we performed a special angle reproduction test which was described in the literature. Additionally the subjects were tested with and without a knee bandage, to test its influence on knee-joint proprioception. Our results showed that preoperatively a significant deterioration in proprioception was present compared with the control group. We could not find any influence of the knee bandage on the proprioception of the injured knee. The postoperative group of patients showed a significantly better proprioceptive capability compared to the preoperative patients. The postoperative results also did not show any significant difference as compared to those of the control group.

Adult↗
PubMed1995

[Proprioceptive capacities of the healthy knee joint: modification by an elastic bandage].

In 30 healthy volunteers with clinical inconspicuous knee joints, the proprioception of the knee joint was evaluated. The proprioceptive capability of the subjects was tested by an angle reproduction test. Additionally all knee joints were measured with and without an elastic knee bandage. The study showed no difference, neither between the left and the right knee joint, nor between men and women. However, at the mid-range of knee joint motion a significant deterioration of the proprioception could be documented. Applying an elastic knee bandage resulted in a significant improvement of the results.

Adult↗
PubMedDate not supplied

[Polyethylene content and cell size of foreign body giant cells in aseptic hip prosthesis loosening--a histomorphometric study].

INTRODUCTION: In aseptic loosening of cementless hip arthroplasty polyethylene particles are phagocytized by macrophages and foreign-body giant cells. This initiates an osteolytic cascade. In this study, the authors investigated if there are correlations between the size of foreign-body giant cells and the polyethylene loading and number of intracellular particles as determined by light microscopy. MATERIAL AND METHOD: Histological specimens were processed from tissues retrieved during revision surgery of 7 cases of cementless hip arthroplasty which had become aseptically loose. The specimens were analyzed by histolomorphology and histomorphometry. The cell size, polyethylene loading and intracellular particle number of 111 foreign-body giant cells were determined. A regression analysis was performed to investigate if there was a correlation between these variables. RESULTS: The mean cell size was 1417 +/- 487 micron 2, the mean polyethylene loading was 49 +/- 42 micron 2 and the mean intracellular particle number was 10.4 +/- 5.4. The cell size correlated with both the intracellular particle number (r = 0.25) and the polyethylene loading (r = 0.39). CONCLUSIONS: In the cellular reaction to polyethylene particles in aseptic loosening of cementless total hip arthroplasty, the size of foreign-body giant cells correlates with intracellular polyethylene loading and intracellular polyethylene particle number as determined by light microscopy. The presence of large foreign body giant cells might be associated with a high particle load of the tissue and a high osteolytic activity.

Aged↗
PubMedDate not supplied

[Primary rotatory stability of hip endoprostheses stems after manual and robot assisted implantation].

AIM: In our study we compared the primary rotatory stability of hip endoprostheses which were implanted with the help of a robot with that of manually implanted stems. METHOD: We examined three different types of prosthesis-stems: Osteolock (Stryker-Howmedica), CBC (Mathys), Excia (Aesculap). Furthermore, we examined two types of prostheses which could not be implanted with a robot (Sl-Plus/Endoplus; Hipstar/Stryker-Howmedica). 10 stems of each prosthesis type were implanted in identical polyurethane foam blocks; 5 of them were implantated manually, 5 with the help of a robot (CASPAR, URS-Ortho). After implantation, a defined rotatory stress was put on the stem with the help of a torquing machine. The torsional moment which was necessary until the stem broke out of the foam was documented with the help of special software. RESULTS: In all types of prostheses the use of the robot system led to a higher rotatory stability compared to the manual group. Among the three tested types of prosthesis stems, the CBC stem is significantly more stable for rotatory forces after robot-assisted implantation compared to the other two types. After manual implantation there was no difference in stability between the different stems. The Zweymüller stem and the Hipstar prosthesis did very well, even in comparison to the robot-implanted group. The results of the Zweymüller stem and the robot-implanted CBC Stem were similar, and a significantly higher rotatory stability of the Hipstar prosthesis compared to every other stem was observed. CONCLUSION: Using a robot, the rotatory stability of hip endoprostheses can be improved. However, the design of the stems seems to be even more important for the stability than the implantation technique.

Arthroplasty, Replacement, Hip↗