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Friday, October 8, 2010, 8:40-9:50Session B10: Navigation and Robotics in ArthroplastyComparing Navigated Versus Conventional TKR. Short Term RadiologicalResult*Eltayeb Nasser - American Hospital Dubai - Dubai, UAE*Email: eltayeb77@hotmail.com6o patient where included in this comparative study. Patients where divided into 3 groups.Group A including TKR done navigation guided in a navigation techniques experienced center.Group B including patient done navigation guided in less experienced center. Group c includingpatients done conventionally by an experienced surgeon. Accuracy was the primary end point.Where an independent observer was requested to comment on the post operative x-ray blindlyand to measure accuracy using software. Result showed no significant difference in postoperative radiological accuracy in the 3 groups.Thursday, October 7, 2010, 16:50-17:40Session B8: Management of Complications in TKAMethicillin-Resistant Staphylococcus Aureus in Total Knee ArthroplastyTreated With Revision and Direct Intraarticular Antibiotic InfusionLeo Whiteside - Missouri Bone and Joint Research Foundation - St. Louis, USAMichael Peppers - Walgreens-Option Care - St. Louis, USA*Tariq Nayfeh - Johns Hopkins University College of Medicine - Baltimore, USAMarcel Roy - Missouri Bone and Joint Research Foundation - St. Louis, USA*Email: tnayfeh1@jhmi.eduIntroduction: Resistant organisms are difficult to eradicate in infected total knee arthroplasty,and treatment of methicillin-resistant Staphylococcus aureus (MRSA) is especially challenging.Whereas most surgeons use antibiotic-impregnated cement during revision to treat infection, thedelivery of the drug in adequate doses is limited in penetration and duration. This studypresents the 2- to 8-year prospective results of one-stage revision and intraarticular antibioticinfusion protocol used to treat MRSA.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]
Methods: Eighteen knees (18 patients) with methicillin-resistant Staphylococcus aureus weretreated between January 2001 and January 2007 with one-stage revision protocol that includeddébridement, uncemented revision of total knee components, and intraarticular infusion of 500mg vancomycin via Hickman catheter once or twice daily for 6 weeks. (Figure 1) Nointravenous antibiotics were used after the first 24 hours. Serum vancomycin levels weremonitored to maintain levels between 3 and 10 µg/mL. The mean serum vancomycin peakconcentration was 6 ± 2 µg/mL and the mean serum vancomycin trough concentration was 3 ± 1µg/mL at 2 weeks postoperative.Results: Knee synovial fluid peak and trough vancomycin levels were measured in two knees.Synovial fluid peak concentrations were 10,233 µg/mL and 20,167 µg/mL and troughconcentrations were 724 µg/mL and 543µg/mL, respectively. Minimum followup was 27months (range, 27-75 months). Mean followup was 62 months, (range, 27–96 months). At 2-year followup, mean Knee Society score was 83 ± 9. No radiographic evidence of implantmigration has occurred. One knee became reinfected with methicillin-resistant Staphylococcusaureus and was reoperated at 5 months. A necrotic bone segment was found, the knee wasdebrided and revised, and the antibiotic infusion protocol was readministered. The kneeremained free of infection at 42 months postoperatively.Conclusions: One-stage revision with uncemented components and 6 weeks intraarticularvancomycin administration safely and effectively treated MRSA-infected TKA with noapparent complications.FiguresThursday, October 7, 2010, 10:20-11:00Session A3: Bearing Mobility IssuesRoughness and Surface Polarity of Retrieved Zirconia Femoral Heads*Marcel Roy - Missouri Bone and Joint Research Foundation - St. Louis, USALeo Whiteside - Missouri Bone and Joint Research Foundation - St. Louis, USATariq Nayfeh - Johns Hopkins University College of Medicine - Baltimore, USABrian Katerberg - Signal Medical Corp - St. Louis, USA*Email: mroy@mobojo.orgIntroduction: Recent clinical studies found no apparent reduction in wear using yttriastabilizedzirconia (Y-TZP) instead of cobalt chromium alloy femoral heads bearing againstcross-linked UHMWPE. The purpose of this study was to compare the surface topography ofretrieved Y-TZP and magnesia-stabilized zirconia (Mg-PSZ) femoral heads and evaluate theinfluence of time in vivo. The increase in average roughness (Ra, Sa) of Y-TZP due to phasetransformation in vivo is well documented, while Mg-PSZ does not roughen or undergo phasetransformation in vivo. However, the effects of phase transformation on the polarity (skewness,Ssk) of the surface of retrieved ZrO 2 heads has not been reported. We hypothesized that phasefile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]
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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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acetabulum, which with a modern por
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Page 188 and 189: Conclusion: The results of this stu
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Page 192 and 193: *Email: sgh_iizu@grn.janis.or.jpAbs
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Page 200 and 201: Keywords: total knee arthroplasty,
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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
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Page 216 and 217: Discussion:This study demonstrates
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Page 224 and 225: Minimal invasive surgery (MIS)is ac
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Page 228 and 229: Thursday, October 7, 2010, 14:20-15
Page 230 and 231: *Stephen Murphy - New England Bapti
Page 234 and 235: scratching effect against the femor
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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
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Page 266 and 267: *Pietro Ruggieri - University of Bo
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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
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Page 282 and 283: stability of joint in full extensio
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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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