[Mineralization of the Skeleton (DEXA) during Revision Surgery of the Hip Joint.]. / Stav mineralizácie skeletu (DEXA) pri revíznych operáciách koxy.

The authors focus attention on the quality of osseous tissue in patients with revisions of TEP of the hip joint. They evaluate the quality of the osseous tissue indirectly, based on densitometric examination DEXA (DPX) using an apparatus LUNAR DPX L. They used software for whole body assessment. Measurements in 53 patients (33 women and 20 men), mean age of women 65 years, of the men 68 years, with an average period of 11 years (1-15 years) since the primary implantation revealed the following results. All patients have a reduced bone density of the pelvis and lower extremities. In men the density is lowest in the lower extremities - BMD 1.27 g/cm2 which corresponds to 91% age of the corresponding healthy population. The Z score is -1.31. In women the authors found a more marked reduction of the bone density than in men. The greatest decalcification was found in the lower extremities, BMD 0.96 g/cm2, which corresponds to 89% age of the corresponding population. The Z score is -1.57. The pelvis had a BMD of 0.98, i.e. 94% of the normal value, the Z score is -0.68. Based on these results the authors recommend to pay attention to improvement of the osseous tissue during revisions of TEP of the hip joint by dietary measures, lifestyle, pharmacological means and exercise. Key words: revisions of TEP of the hip joint, osteoporosis, densitometry, DEXA, DPX.

[Implantation of 110 total hip joint endoprosthesis using the Zweymüller method]. / Skúsenosti s implantáciou 110 totálnych endoprotéz bedrového klbu podl'a Zweymüllera.

The authors discuss in the submitted paper the advantages and disadvantages of cemented and non-cemented endoprostheses, type Zweymüller. They evaluate the medium-term results (one half to 5 years) after surgery in 92 patients from a total of 121 operations in 110 patients (11 bilateral). As to indications, the first place was held by so-called dysplastic coxarthroses, followed by post-traumatic coxarthroses and rheumatoid arthritis incl. the juvenile type. The results of these operations were after an average of 18.27 months following operation according to the DMS evaluation of Merle d'Aubigné and Postel excellent and good in 89%. The authors recorded a relatively small percentage of complications, associated in particular with the replacement of the acetabulum in three patients and the replacement of the femoral component in two patients.