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Biomedical subjects

H Mittelmeier

Publications and source records attributed to H Mittelmeier.

At least 37 records · Page 2Linked to original sources
PubMed1985

[Prosthesis exchange with a cement-free ceramic prosthesis].

Representation of the causes of failure of cemented total hip prostheses concerning long-term-results due to wear problems and cement destruction. In order to avoid a further weakening of bony structures we recommend the use of the self-locking Autophor-prosthesis (Mittelmeier) in case of revision. At the same time additional bone-grafting for better ingrowth of the prosthesis often becomes necessary. By means of the casuistry of our clinic (1975-1983) with altogether 102 revision cases with self-locking Autophor-prostheses we represent the results. With the exception of 5 failure cases these results were very satisfactory.

Adult↗
PubMed1984

Experimental animal investigation of bone regeneration with collagen-apatite.

Multicentric osteoregeneration is a new principle of osteoinduction [31a] which can be realized with the combination of collagen and fine dispersed hydroxyapatite ceramic particles (Collapat). This was histomorphometrically proved in the present study involving 14 rabbits with 28 6-mm-wide bore holes in the distal femoral condyles. With Collapat, an average of 5 times more new bone was regenerated than in the control defects without implant. The Wilcoxon matched-pairs signed-ranks test proved the positive effect of the implant Collapat on osteoregeneration with a significance of P less than 0.0001. At sites of Collapat insertion bone regeneration begins in the 2nd week, reaches its climax in the 3rd week, and is completed after the 4th week. in the course of development the histological picture is typified by a lively bone remodeling. Bone formation can be recognized in direct contact to the apatite granules. Foreign body or allergic reactions are not observed. Remodeling of the bone is not hindered by the slowly resorbable apatite granules. About 250 human implantations have been performed in our hospital since 1979, with good results and no negative effects.

Animals↗
PubMed1984

[Rupture of the Achilles tendon, cause - prognosis - therapy - late results].

Reports about 147 ruptures of the Achilles tendon which were mainly caused by sports activities (85%). The authors also report on the operative methods used in our clinic, and on the long-term results (up to 16 years) of our cases. The complication rate was relatively low, and reoperations were necessary in a few cases. Healing of the Achilles tendon was achieved in every case. The disability to work was relatively short. Most of the patients were able to resume their former sports activity.

Achilles Tendon↗
PubMed1984

[Indications, technic and results of knee joint arthrodesis].

Report on about 67 cases of knee arthrodesis (septic and aseptic cases). In aseptic cases we preferred arthrodesis with autocompression plates in 21 patients. In the other cases we preferred Fixateur externe. We could follow up the patients for an average period of 25.4 months. The arthrodesis was consolidated in 98.3%; the infection could be cured in 92.9% of the cases.

Adult↗
PubMed1983

[Indication and results of an alloarthroplastic hip joint replacement with the "crutch" endoprosthesis].

After discussing the relevant literature concerning indication, results and complications of total-hip-replacement by special prothesis of the upper end of the femur in cases of tumors or serious traumatic bone destructions of the intertrochanteric region of elder patients we representate our own 30 patients (from the years 1973 to 1982). Often, this special prothesis could be only a palliative regional solution in the cases of local removal of the tumor because of the advanced disease. But this treatment is important for temporary reconstruction; even in cases of aged patients with serious fragmented fractures of the pertrochanteric and subtrochanteric region we could reach an early remobilisation. This operation represents--in certain indications--an essential improvement of therapeutic facilities.

Adult↗
PubMed1983

[Treatment of irreparable scaphoid bone pseudarthrosis and necrosis by partial resection of the scaphoid].

After review of the literature on scaphoid pseudarthrosis and resection, the authors give an evaluation of twenty-five palliative operations for non-reconstructible scaphoid pseudarthrosis, (some in combination with resection of the styloid process). The results were generally good. Failures are found only in cases of insufficient proximal scaphoid resection or of preoperative wrist arthrosis which was too advanced. Partial resection of the scaphoid seems in most cases preferable to the alternative trans-scapho-lunar resection (resection of the lunate and the proximal half of the scaphoid as recommended by Steinhäuser). This bigger intervention seems justified only in cases of advanced arthrosis of the proximal wrist. In cases of severe generalised wrist arthrosis, however, arthrodesis is recommended.

Adult↗