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scratching effect against the femoral canal due to the rougher surface of the plasma-sprayporous-coating works advantageously for initial mechanical stability.Thursday, October 7, 2010, 11:10-11:50Session A4: Hip ResurfacingThe Fate of Initial Gaps Between the Cup and Acetabular Floor inResurfacing Hip ArthroplastyIntroduction*Satoshi Nakasone - Osaka University Graduate School of Medicine - Suita, JapanMasaki Takao - Osaka University Graduate School of Medicine - Suita, JapanTakashi Nishii - Osaka University Graduate School of Medicine - Suita, JapanTakashi Sakai - Osaka University Graduate School of Medicine - Suita, JapanNobuo Nakamura - Kyowakai Hospital - Suita, JapanNobuhiko Sugano - Osaka University Graduate School of Medicine - Suita, Japan*Email: satoshi_nakasone@hotmail.comCurrent standard cups of metal on metal resurfacing hip arthroplasty (RHA) have no dome holesand it is very difficult for surgeons to confirm full seating of these cups. This sometimes resultsin gap formation between the cup and acetabular floor. Although the incidence of initial gapsusing modular press-fit cups with dome screw holes has been reported to range from 20 to35%, few studies have reported the incidence of gap formation with monoblock metal cups andits clinical consequences in RHA. The purpose of this study was to investigate retrospectivelythe incidence of initial gap formation and whether the initial gap influences the clinical resultsin RHA.Material and MethodRHA was performed on 166 hips of 146 patients using the Birmingham Hip Resurfacing (BHR)(MMT, UK) between 1998 and 2007. Mean age at operation was 48.7 years (range, 19-85years). Mean duration of follow-up was 6.9 years (2.0-10.6). Acetabular reaming wasperformed with the use of hemispherical reamers and the reamer size was increased up to anodd number diameter which provided tight rim fit in the antero-posterior direction. The samesize hemispherical provisional cup with dome holes and slits was used to check the cavity forcomplete seating. If the provisional cup could not be seated on the floor, reaming was repeatedwith the same reamer to remove the rim bump until full seating was achieved. Acetabular cupsof 1mm larger diameter were impacted into the acetabulum by a press-fit technique. Afterpress-fit fixation, the stability of the cups was confirmed with a synchronized movement of thepelvis and the cup inserter by applying a gentle torque. Clinical evaluation was performed usingWOMAC at the latest follow-up. Radiographic assessments were performed using radiographsimmediately after the surgery, at 3 weeks, 3 months, 1 year, and then annually thereafter. Weevaluated the height of the gap between the cup and acetabular surface, cup inclination angle,cup migration and the time to gap filling. To investigate the relationship between the magnitudeof the gap and the radiographic results, the patients were divided into two groups according tothe height of the initial gap; the cases with a gap of less than 3 mm on the initial radiographfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]
were grouped into a small gap group, the cases with a gap of 3mm or more were grouped into alarge gap group. We compared the changes in the height of the gap, in the cup inclination angleand the cup migration between the groups.ResultsGaps were identified in 21 of 166 hips (13%) on the postoperative radiograph. The averageheight of the gaps was 2.4 mm (0.56-4.5mm). Of the 21 hips with gaps, there was no revisionduring the follow up period. 12 of the 21 hips were classified into the small gap group, 9 of the21 hips were classified into the large gap group. In the small gap group, there were no changesof cup inclination angle of more than 3 degrees nor was there cup migration of more than 3mm.On the other hand, in the large gap group, 6 of the 9 hips showed reductions of the cupinclination angle of more than 3 degrees with 3mm or more of migration during the initial 3months (P
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Convened under the auspicious of es
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Special Thank YouISTA’s Board of
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Invited SpeakersJean Noel ArgensonM
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Thursday, October 7, 2010Session AS
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Oxinium Versus Metal on Polyethylen
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13:30 - 14:00Invited talk: Hip Arth
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What Can We Do With Periprosthetic
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New Concept in Soft Tissue Balancin
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Comparison of Drain Clamp After Bil
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Session - A7:45 - 8:15Invited talk:
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Massive Endoprosthetic Replacement
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Hydroxyapatite Block for Reconstruc
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13. Dilute Betadine Lavage Prior to
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37. Fluoroscopic Analysis of Advanc
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60. Influence of Impaction Forces o
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85. Surgical Wound Infection as a P
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Saturday, October 9, 2010, 8:15-9:0
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algorithm was tested for short incr
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Ten patients with fracture acetabul
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Saturday, October 9, 2010, 14:00-14
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*Email: drbaldiniandrea@yahoo.itThe
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evision surgery were aseptic loosen
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*Dante Parodi - Clinica Alemana De
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Thursday, October 7, 2010, 17:30-18
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and subsequent exposure time to rad
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of the patient during the acetabula
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FiguresFriday, October 8, 2010, 11:
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Results: No further revisions were
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Minimally Invasive Total Knee Arthr
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and are due to insufficient fixatio
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Methods: An inverse finite element
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Finally a subject-specific model co
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prosthesis component have been calc
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novel tools and devices that are ab
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from 48.6 to 92.2, while functional
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Friday, October 8, 2010, 8:00-8:30S
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The Kaplan-Meier survival rate was
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especially because most of the stan
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knee and offer a new development of
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This was the patient with revision
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Ain Shams UniversityCairo, EgyptPle
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Two-stage revision arthroplasty is
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inexpensive modular femoral compone
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successful treatment outcome was de
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Pathogen N PercentStaphylococcus au
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component as their permanent prosth
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FiguresFigure 1Friday, October 8, 2
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*Email: joseph.fetto@nyumc.orgNon-c
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MATERIAL AND METHODS423 total knee
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MATERIALS AND METHODSFrom January 1
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Introduction:Mike Reed - Wansbeck G
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Conclusions:To the best our knowled
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ing superior clinical results when
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one) in 11 (26%), type II (failure
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Correction of leg length discrepanc
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motion is separated from the transv
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Is the Frecnh Paradox a Reality? Lo
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uncovered in the remaining 53 hips.
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found in the currently used MOM bea
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followed since their initial presen
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ã€€On the axial plane, the ave
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For revision hip replacements, the
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Friday, October 8, 2010, 15:20-16:0
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Friday, October 8, 2010, 8:00-8:30S
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ResultCup geometries with screws ha
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to insert the guide pin into the fe
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to 8% of THA patients have cups mal
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In a recent investigation the effec
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Conclusions.Fixed valgus angle rese
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fluoroscopic analysis of kinematics
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vivo motion of MB total knee arthro
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ResultsMean follow-up was 6 yrs (SD
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precision of implant placement. We
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*J. Philippe Kretzer - Laboratory o
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COM group whereas both components w
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In the present study, the patella h
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characteristic of the MB prosthesis
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Friday, October 8, 2010, 15:00-16:0
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The ceramic on ceramic strategy wit
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Page 188 and 189: Conclusion: The results of this stu
Page 190 and 191: The incidence of periprosthetic fra
Page 192 and 193: *Email: sgh_iizu@grn.janis.or.jpAbs
Page 194 and 195: components (78 %) that remained rig
Page 196 and 197: hydroxyapatite ceramic in bone tumo
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Page 200 and 201: Keywords: total knee arthroplasty,
Page 202 and 203: of the tensor (Fig. 1B). During eac
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Page 206 and 207: 31. Whiteside LA, Kasselt MR, Hayne
Page 208 and 209: Corne van Loon - rijnstate hospital
Page 210 and 211: Osaka, JapanTomonori Arita - Gradua
Page 212 and 213: Gary Poehling - Wake forest univers
Page 214 and 215: mean Harris hip score was 98 points
Page 216 and 217: Discussion:This study demonstrates
Page 218 and 219: Thursday, October 7, 2010, 8:00-8:5
Page 220 and 221: we usually excise both ACL & PCL, s
Page 222 and 223: true and false acetabulum2- In Femo
Page 224 and 225: Minimal invasive surgery (MIS)is ac
Page 226 and 227: Saturday, October 9, 2010, 16:00-16
Page 228 and 229: Thursday, October 7, 2010, 14:20-15
Page 230 and 231: *Stephen Murphy - New England Bapti
Page 236 and 237: Friday, October 8, 2010, 8:40-9:50S
Page 238 and 239: transformation associated with the
Page 240 and 241: Bearing Surfaces in Primary Total H
Page 242 and 243: Introduction: Proper rotational ali
Page 244 and 245: Materials and Method4 cases and 5 k
Page 246 and 247: to improve exposure in difficult ca
Page 248 and 249: We have used different stems (strai
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Page 252 and 253: Our preliminary results are encoura
Page 254 and 255: A modified titanium spinal pedicle
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Page 262 and 263: Use of a novel ligament gap balanci
Page 264 and 265: femur 659, proximal tibia 198, prox
Page 266 and 267: *Pietro Ruggieri - University of Bo
Page 268 and 269: The presentattion will focus on tec
Page 270 and 271: Accuracy of Femoral Component Align
Page 272 and 273: Results.Dislocation: no.Clinical ou
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Page 276 and 277: iocompatible material to man,it is
Page 278 and 279: BackgroundThe current literature te
Page 280 and 281: axis and component positioning. We
Page 282 and 283: stability of joint in full extensio
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with femoralrevision combined with
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arthroplasty. Obesity is an appropr
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Conclusions:We conclude that with u
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There was no difference in function
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We present the results of a consecu
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Barbara Maestri - university of rom
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gap balancing and providing reasona
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Highly Crosslinked PE as Alternativ
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plastic limit of UHMWPe. Changes in
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equired blood transfusion (RD -0.34
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age limit for THA can be lowered.Fr
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lood transfusion might be necessary
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Thursday, October 7, 2010, 7:30-8:2
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The hammering sounds in press-fit i
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We investigated the period from fir
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technique.The subjects were 16 knee
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Persistent patellofemoral symptoms
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peak dynamic varus angle over time.
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slope on the medial side was minima
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for the follow-up examination. A te
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Tateaki Shimakawa - Tokushima Munic
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male.We retrospectively reviewed pr
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affected the interface stresses cal
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Introduction:Cadaveric Evaluation o
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defects.Conclusion: Periprosthetic
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FiguresFigure 1 Figure 2 Figure 3 F
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Poster: 4Testing High Performance A
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Background:Modular endoprosthetic r
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The mean follow up was 4.2 years (3
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compared to the attending surgeon.D
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Poster: 13Postural Control Features
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e extended to the cup with malposit
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Poster: 17A Novel Method to Determi
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and it’s the highest rate has bee
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otation and 19 had a paradoxical ti
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Poster: 23Lumbar Disc Replacement.
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VTE-, we considered that the two co
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Poster: 27Accuracy of Acetabular Cu
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Poster: 29In Vivo Measurement of Pe
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Poster: 31Clinical and Laboratory V
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Figure 1: Typical steps used for co
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Alignment & bonecutting errorsMeanT
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allowing bone cutting to consume 25
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17. Jonsson B, Astrom J. Alignment
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Branislav Jaramaz - The Western Pen
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Poster: 34What Is the Blood Transfu
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dislocation after total hip arthrop
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Poster: 38Intraarticular Injection
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Sudhir Rao - South London Heathcare
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*Naoyuki Katayama - Hokkaido Orthop
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198.5±5.5°and 157.0±7.5°, respe
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Introduction*Sujith Konan - Univers
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Poster: 48IntroductionRevision Hip
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In conclusion we have developed a s
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laxity on wear and joint kinematics
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measurement interval. The wear rate
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spring model for AP translation and
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Haider, H., Walker, P. S., 2002. An
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Poster: 52Development of a Constant
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*Takahiro Lida - Osaka City Univers
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coating, have been developed with t
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3. Push-out Biomechanical AnalysisM
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anodized/hydrothermally treated tit
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However, she then suffered from sev
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central osteophytes in hip osteoart
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Lucia Manunta - University - sassar
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Based on above measurement we had t
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3, 6, 12, 18, and 24 months post-op
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amorphous and degrades faster in th
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Conclusion: the longivity of hip ar
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Poster: 70Outcome of Ceramic-Cerami
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posterior structures (facets and fa
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After thirty-eight months in vivo,
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disadvantages are provided by this
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chipping of the insert. Therefore a
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Metal cups, embedded in a cast resi
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about their preferences regarding f
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A periprosthetic femoral fracture a
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Superficial wound infection occurre
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International scientific literature
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were balanced to within 2° to 3°
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ecause of deep infction. One was ma
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Poster: 91So Are Sutures Actually B
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patients having staged bilateral pr
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adiographs often underestimate the
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A total of 7 osteoarthritis hip wer
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Poster: 98Appropriate Spatial Desig
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Poster: 100Total Hip Arthroplasty i
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Poster: 102Aggressive Early Debride
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this study was to assess the agreem
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Hemiarthroplasty - an Innovative Me
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p=0.55. This minimal change in leng
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Poster: 109Severe Persistent Synovi
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*Email: jerome.tonetti@free.frIn pr
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in 5 QFT-G positive patients with a
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arthroplasty (TKA). In the other ha
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