Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_
Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_ Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_
Poster Topic: Arthroplasty - Hip Abstract number: 24097 STEM REVISION OF THE HIP USING AN UNCEMENTED MODULUS SYSTEM AND ACCORD PLATE Fujio HIGUCHI, Yumiko ISHIBASHI, Tokiko SIMOYAMA, Takahiro OKAWA, Shinichiro KUME, Masafumi GOTOH, Yoshida SHIRO, Kyoko ARAKI Kurume University Medical Center Department Orthopaedic Surgery and Center for Joint Surgery, Kurume (JAPAN) Since 2006, we have used an uncemented modulus system (Lima Co.) with Accord plate (Smith & Nephew Co.) for stem revision in 14 hips. These cases involved loosening in the femoral component in 8, recurrent dislocation in 2, periprosthetic fracture in 2, and infection with pain of unknown cause in the other 1. Methods: The surgical approach was transtrochanteric according to Charnley in 2, Charnley and fenestration of the femoral shaft in 2, transfemoral according to Wagner in 9, and extended transtrochanteric according to Gundolf in the other 1. Preoperative radiographical findings were classified according to Paprosky (2003), as type II in 2, type IIIA in 11, and cement spacer in 1. The postoperative management was bed rest for 2 days, sitting and moving in a wheelchair from day 4, partial weight bearing gait from week 4, and full weight bearing gait from week 8.Results: Painless walk was achieved in all cases. There were some complications; stem subsidence in 2, hip dislocation in 1, but no infection and no deep vein thrombosis. No revision was needed. Conclusions: 1. The modulus revision stem was too large in the metaphysis of the femur for some revision cases of small Japanese old women. 2. Combination with the Accord plate was performed via the transfemoral approach which was easy for removing the femoral component. 3. Combination with the Accord plate permitted earlier recovery even after invasive revision. 36
Poster Topic: Arthroplasty - Hip Abstract number: 24140 DOES THE POSITION OF THE HIP INFLUENCE MEASUREMENTS OF WEAR? Georgios DIGAS 1 , Johan KARRHOLM 2 , Per-Erik JOHANSSON 2 1 Orthopaedic Department, Xanthi (GREECE), 2 Surgical Science, Gothenborg (SWEDEN) The influence of changed position of the hip, and asymmetrical wear on the spatial relation between the femoral head and the socket of a total hip arthroplasty (THA) is poorly known.We studied the position of the femoral head centre in 2 patient groups (Group 1: 5 females, 4 males, median age 50; Group 2: 4 females, 5 males, median age 62 years) 2 years after a cemented THA during active abduction of the hip from 0 to 20° (Group 1) and during weight-bearing hip ex tension from 30 to 0° (group 2) using radiostereometric analysis based on sequential exposures.During the active abduction the femoral head centre displaced median 0,22 mm medially (p = 0,008, Wilcoxon signed Ranks test), 0,01 mm distally (p = 0,7) and 0,07 mm posteriorly (p = 0,9).During weight-bearing extension from 30 to 0°, the head centre moved median 0,03 mm medially (p = 0,4), 0,07 mm proximally (p = 0,014) and 0,18 mm anteriorly (p = 0,3). A previous study (1) found a small (0,05 mm) but significant change of the medial/lateral position of the femoral head centre between supine and standing position. We observed a higher change during active abduction. The influence of hip motions on the proximal/distal position of femoral head centre was small indicating no or minimum influence on determination of proximal wear rates up to 2 years after the operation. (1) Bragdon et al: Clin Orthop Relat Res. 2006 Jul; 448:46-51 37
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Poster<br />
Topic: Arthroplasty - Hip<br />
Abstract number: 24140<br />
DOES THE POSITION OF THE HIP INFLUENCE MEASUREMENTS OF WEAR?<br />
Georgios DIGAS 1 , Johan KARRHOLM 2 , Per-Erik JOHANSSON 2<br />
1 Orthopaedic Department, Xanthi (GREECE), 2 Surgical Science, Gothenborg<br />
(SWEDEN)<br />
The influence of changed position of the hip, and asymmetrical wear on the spatial<br />
relation between the femoral head and the socket of a total hip arthroplasty (THA) is<br />
poorly known.We studied the position of the femoral head centre in 2 patient groups<br />
(Group 1: 5 females, 4 males, median age 50; Group 2: 4 females, 5 males, median<br />
age 62 years) 2 years after a cemented THA during active abduction of the hip from<br />
0 to 20° (Group 1) and during weight-bearing hip ex tension from 30 to 0° (group 2)<br />
using radiostereometric analysis based on sequential exposures.During the active<br />
abduction the femoral head centre displaced median 0,22 mm medially (p = 0,008,<br />
Wilcoxon signed Ranks test), 0,01 mm distally (p = 0,7) and 0,07 mm posteriorly (p =<br />
0,9).During weight-bearing extension from 30 to 0°, the head centre moved median<br />
0,03 mm medially (p = 0,4), 0,07 mm proximally (p = 0,014) and 0,18 mm anteriorly<br />
(p = 0,3). A previous study (1) found a small (0,05 mm) but significant change of the<br />
medial/lateral position of the femoral head centre between supine and standing<br />
position. We observed a higher change during active abduction. The influence of hip<br />
motions on the proximal/distal position of femoral head centre was small indicating<br />
no or minimum influence on determination of proximal wear rates up to 2 years after<br />
the operation. (1) Bragdon et al: Clin Orthop Relat Res. 2006 Jul; 448:46-51<br />
37
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