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fluoroscopic analysis of kinematics during deep flexion kneeling after fixed bearing PS TKA,tibial internal rotation increased with greater knee flexion, but there was high variability aboutthe trend line. Patients with deeply flexing fixed bearing PS knee arthroplasty showed twophases of condylar translation with deep flexion.Interestingly, these two-phase translations aredictated by the design of the cam/post mechanism and serve to maintain the condyles within theposterior articular surfaces of the tibia plateau.Surface separation of both medial and lateralcondyles was observed in terminal flexion.At least direct edge wear by the femoral condyle inmaximum flexion is denied from this phenomenon. However, potential problems of TKA thatallows for deep flexion are considerable such as dislocation, polyethylene wear, and anteriorknee pain. In TKA using PS type of implant, the risk of insert damage also exists in factorsother than deep flexion motion, such as cam/post or notch/post. Surgeons must confirmcarefully not to set implants loose, or not to leave remnants of osteophytes during surgery andto pay attention not to raise the activity level of patients too high after surgery.Saturday, October 9, 2010, 7:45-8:50Session B16: Performance and Survivorship in ArthroplastyIntra-Operative Gap Measurement and Component Type Selection in TotalKnee Arthroplasty, Cruciate Retaining or Posterior Substitute.Ryutaku Kaneyama - Funabashi Orthopedic Hospital - Funabashi-Shi, Japan*Hideaki Shiratsuchi - Funabashi Orthopedic Hospital - Funabashi, JapanKazuhiro Oinuma - Funabashi Orthopedic Hospital - Funabashi-shi, JapanTomonori Nagamine - Funabashi Orthopedic Hospital - Funabashi-shi, JapanYoko Miura - Funabashi Orthopedic Hospital - Funabashi-shi, JapanTatsuya Tamaki - Funabashi Orthopedic Hospital - Funabashi, JapanGun Sha - Funabashi Orthopedic Hospital - Funabashi-shi, JapanTakanori Akada - Funabashi Orthopedic Hospital - Funabashi-shi, Japan*Email: shiratsuchi@fff.or.jpIntroduction:There is no criteria to select cruciate retaining (CR) or posterior substitute (PS)component in total knee arthroplasty (TKA). In this study, extension and flexion gaps weremeasured intra-operatively with posterior cruciate ligament (PCL) remained to revealcharacteristics of the gaps. Component type selection, CR or PS, was decided intra-operativelyaccording to the gaps in each knee.Materials and methods:One hundred and sixty knees with osteoarthritis were investigated.Extension gap (EG) was made by resection of 8 mm distal femur and 10 mm proximal tibia.After measurement of femoral AP size, about 4 mm bigger 4-in-1 femoral cutting guide thanmeasured size was used for pre-cut of femoral posterior condyle[Figure 1]. With this technique,flexion gap (FG) was made 4 mm smaller than usual measured resection. The gaps weremeasured by a tension device with 30 pounds tension and FG was corrected by the amount ofpre-cut. According to the EG and corrected FG, component type was decided.Too small FGusually needed PCL resection or (and) smaller size of femoral component to make enough finalFG. On the other hand, large FG needed careful consideration to sacrifice PCL for adequatefinal FG. In these cases, CR component was selected usually. If necessary, soft tissue wasreleased for good ligament balance. As the final step of the surgical procedure, the size offile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]
femoral component was decided for adequate final FG. It was changeable up to 4 mm largerthan measured size[Figure 2].Results:After pre-cut of femoral posterior condyle and correction of FG by the amount of precut,the range of the gaps were 10~31 mm (average 20.6±3.7) in flexion and 8~29 mm (average17.5±3.4) in extension. There were wide variations in both gaps. The range of the differencebetween corrected FG and EG was –4~12 mm (average 3.1±3.3) and corrected FG wassignificantly larger than EG (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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Page 112 and 113: Saturday, October 9, 2010, 10:30-11
Page 114 and 115: *Email: joseph.fetto@nyumc.orgNon-c
Page 116 and 117: MATERIAL AND METHODS423 total knee
Page 118 and 119: MATERIALS AND METHODSFrom January 1
Page 120 and 121: Thursday, October 7, 2010, 17:30-18
Page 122 and 123: Saturday, October 9, 2010, 13:30-14
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
Page 134 and 135: motion is separated from the transv
Page 136 and 137: Is the Frecnh Paradox a Reality? Lo
Page 138 and 139: uncovered in the remaining 53 hips.
Page 140 and 141: found in the currently used MOM bea
Page 142 and 143: followed since their initial presen
Page 144 and 145: ã€€On the axial plane, the ave
Page 146 and 147: For revision hip replacements, the
Page 148 and 149: Friday, October 8, 2010, 15:20-16:0
Page 150 and 151: Friday, October 8, 2010, 8:00-8:30S
Page 152 and 153: ResultCup geometries with screws ha
Page 154 and 155: to insert the guide pin into the fe
Page 156 and 157: to 8% of THA patients have cups mal
Page 158 and 159: In a recent investigation the effec
Page 160 and 161: Conclusions.Fixed valgus angle rese
Page 164 and 165: vivo motion of MB total knee arthro
Page 166 and 167: ResultsMean follow-up was 6 yrs (SD
Page 168 and 169: precision of implant placement. We
Page 170 and 171: *J. Philippe Kretzer - Laboratory o
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Page 174 and 175: Thursday, October 7, 2010, 14:20-15
Page 176 and 177: In the present study, the patella h
Page 178 and 179: characteristic of the MB prosthesis
Page 182 and 183: The ceramic on ceramic strategy wit
Page 184 and 185: acetabulum, which with a modern por
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
Page 198 and 199: one month later to a mean value of
Page 200 and 201: Keywords: total knee arthroplasty,
Page 202 and 203: of the tensor (Fig. 1B). During eac
Page 204 and 205: structures including MCL cut for ac
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
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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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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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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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