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*Email: joseph.fetto@nyumc.orgNon-cemented components have traditionally employed several possible features, among thema stemand/or collar, to achieve proper alignment and initial implant stability within the proximalfemoral cavity.The advent of MIS has stimulated an interest in reducing the dimensions of implants,specifically stem length,in order to facilitate introduction and implantation of the component. The consequence of thistrend appears to bean increase in early aseptic failure, of some components, due to loosening andmigration. Several importantquestions have arisen.1. What are the direction of the deforming forces about a hip during daily activities?2. What design features should a short stem implant exhibit so as to provide optimum stabiltyagainst these forces?3. Is having a stem an absolute requirement of a femoral component?4. What is the miniimum "safe" length a stem must have?5. How can proper short stem alignment be optimized? Is intra-operative x-ray exposurenecessary?This presentation will discuss the computer modelling, laboratory testing and clinical outcomesof variouscomponent designs; and make suggestions concerning directions for future investigations.FiguresFriday, October 8, 2010, 16:30-17:20Session A16: Computer Navigation in THAThe Accuracy of Cup Position in Total Hip Arthroplasty With CT-BasedNavigation System*Kazuo Fujiwara - Okayama University Hospital - Okayama, JapanHirosuke Endo - Okayama University Graduate School of Medicine, Dentistry, andPharmaceutical Sciences - Okayama-city, Japanfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]
Yoshiaki Miyake - Okayama University - Okayama, JapanToshifumi Ozaki - Okayama University Hospital - Okayama, JapanShigeru Mitani - Kawasaki Medical School - Kurashiki-city, Japan*Email: fujiwara@md.okayama-u.ac.jp(Objectives) Few reports were shown about the position of the cup in total hip arthroplasty(THA) with CT-based navigation system. We use minimally invasive surgery (MIS) techniquewhen we perform cementless THA and the correct settings of cups are sometimes difficult inMIS. So we use CT-based navigation system for put implants with correct angles and positions.We evaluated the depth of cup which was shown on intra-operative navigation system.(Materials and Methods) We treated 30 hips in 29 patients (1 male and 28 females) bynavigated THA. 21 osteoarthritis hips, 6 rheumatoid arthritis hips and 3 idiopathic osteonecrosiships were performed THA with VectorVision Hip 2.5.1 navigation system (BrainLAB).Implants were AMS HA cups and PerFix stems (Japan Medical Materials, Osaka). Appropriateangles and positions of cups were decided on the 3D model of pelvis before operation.According to the preoperative planning, we put the implants with navigation system. We correctthe pelvic inclination angle and measured the depth of cups with 3D template software.(Results) The average distance from the surface of the cup to the edge of medial wall of pelviswas 3.4mm (0.0-8.0mm) on the axial plane which include the center of femoral head onpostoperative CT. The average distance from the surface of the cup to the edge of medial wallof pelvis was 6.4mm (1.5-15.0mm) on intraoperative navigation. The average error was 2.9mm(0.0-9.0mm). The cup positions of post operative CT were deeper than that of intraoperativenavigation in twenty six hips (86%).(Conclusions) The shallow setting of cups caused the instability of cups. Deep setting causeddamage of acetabular fossa. The positions of cups on the navigation system tend to be shownshallower than actual positions, so we should take care of deeper setting.Friday, October 8, 2010, 16:30-17:30Session B15: MIS Techniques in TKASubvastus Approach, the Only True Mis Approach in Total KneeINTRODUCTION:*Ibrahim Gado - American Hospital - Dubai, UAESamih Tarabichi - - Dubai, UAE*Email: ibrahim.gado@yahoo.comThe majority of papers covering MIS total knee describe a surgical approach where the quadstendon is violated. This presentation describes a modified subvastus approach using MIStechnique. The results are compared to the regular subvastus approach.file:///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:
Page 64 and 65: Results: No further revisions were
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Page 68 and 69: Minimally Invasive Total Knee Arthr
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Page 72 and 73: Methods: An inverse finite element
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Page 76 and 77: prosthesis component have been calc
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Page 80 and 81: from 48.6 to 92.2, while functional
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Page 84 and 85: The Kaplan-Meier survival rate was
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Page 94 and 95: Ain Shams UniversityCairo, EgyptPle
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Page 108 and 109: FiguresFigure 1Friday, October 8, 2
Page 116 and 117: MATERIAL AND METHODS423 total knee
Page 118 and 119: MATERIALS AND METHODSFrom January 1
Page 124 and 125: Introduction:Mike Reed - Wansbeck G
Page 126 and 127: Conclusions:To the best our knowled
Page 128 and 129: ing superior clinical results when
Page 130 and 131: one) in 11 (26%), type II (failure
Page 132 and 133: Correction of leg length discrepanc
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Page 136 and 137: Is the Frecnh Paradox a Reality? Lo
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Page 140 and 141: found in the currently used MOM bea
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Page 146 and 147: For revision hip replacements, the
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Page 152 and 153: ResultCup geometries with screws ha
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Page 160 and 161: Conclusions.Fixed valgus angle rese
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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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Friday, October 8, 2010, 14:00-14:5
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Conclusion: The results of this stu
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The incidence of periprosthetic fra
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*Email: sgh_iizu@grn.janis.or.jpAbs
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components (78 %) that remained rig
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hydroxyapatite ceramic in bone tumo
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one month later to a mean value of
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Keywords: total knee arthroplasty,
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of the tensor (Fig. 1B). During eac
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structures including MCL cut for ac
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31. Whiteside LA, Kasselt MR, Hayne
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Corne van Loon - rijnstate hospital
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Osaka, JapanTomonori Arita - Gradua
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Gary Poehling - Wake forest univers
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mean Harris hip score was 98 points
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Discussion:This study demonstrates
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Thursday, October 7, 2010, 8:00-8:5
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we usually excise both ACL & PCL, s
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true and false acetabulum2- In Femo
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Minimal invasive surgery (MIS)is ac
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*Stephen Murphy - New England Bapti
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scratching effect against the femor
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Friday, October 8, 2010, 8:40-9:50S
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transformation associated with the
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Bearing Surfaces in Primary Total H
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Introduction: Proper rotational ali
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Materials and Method4 cases and 5 k
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to improve exposure in difficult ca
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We have used different stems (strai
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Our preliminary results are encoura
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A modified titanium spinal pedicle
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Use of a novel ligament gap balanci
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femur 659, proximal tibia 198, prox
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*Pietro Ruggieri - University of Bo
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The presentattion will focus on tec
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Accuracy of Femoral Component Align
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Results.Dislocation: no.Clinical ou
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Friday, October 8, 2010, 8:00-8:30S
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iocompatible material to man,it is
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BackgroundThe current literature te
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axis and component positioning. We
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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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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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