Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 26226
USE OF CEMENTLESS MODULAR ZMR STEM IN REVISIONAL HIP
ARTHROPLASTY
Jaroslaw NITON, Tadeusz NIEDZWIEDZKI, Adam NIEWIADOMSKI, Michal
PAZDZIOR
Orthopaedics and Trauma Surgery Department, Jagiellonian University Collegium
Medicum, Krakow (POLAND)
A purpose of this study is to present indications for and results of revisional hip
arthroplasty with use of cementless modular ZMR stem in patients of Orthopaedic
and Trauma Surgery Department, Jagiellonian University Medical College,
Cracow.ZMR stem has been used in our Department since year 2003 in 59
procedures. The mean age of the 57 patients (22 males, 37 females) was 65. In 4
cases ZMR stem was used in primary hip arthroplasty. Before ZMR stem
implantation 16 patients had undergone approximately 3 different revision surgeries.
In 39 cases ZMR stem implantation was one and only revision surgery after standard
THR. In 28 hips both components were revised. Indications for this procedure were
defined after clinical examination and diagnostic imaging (standard radiographic
examination, scintigraphy, etc.). Papprosky’s scale was used to estimate
periprosthetic bone loss. Postoperative evaluation included radiographic assessment
and clinical HSS scale. According to HSS scale we had 42 very good and good, 9
satisfactory and 6 bad results. Satisfactory and bad results were associated with
acetabular loosening and other big joints arthroplasty. Radiographic assessment: no
new osteolytic laesions were observed. Focal osteolysis visible around primary stem
and pre- or intraoperative periprosthetic femur fractures got healed after ZMR stem
implantation.Modular connection between ZMR stem elements allows for
independent choosing distal part and proximal body of the stem, which is important
especially when unexpected intraoperative conditions make preoperative planning
useless. This stem gives good proximal and distal stabilization with sufficient axial,
rotational and bending forces transmission.
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