Proceedings of the

7th Meeting of the

European Society of Biomechanics

EUROPEAN

BIOMECHANICS

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University of Aarhus, DK

July 8-11,1990

Editors

A. Odgaard, P. Kjaersgaard-Andersen & J.O. Sojbjerg

i UB/TIB Hannover 89I 101 010 109

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RR 560(7)

Time SESSION A1:SPINE I

Chairmen: Jacob HAC (CH)Bunger CE (DK)

10:00 A1 An instrumented fixation devicefor load measurements at thespine.RohlmannA, Bergmann G, GraichenF, Wolff R (FRG)

10:15 A2 Lumbar instability following discsurgery. Intersegmental muscles -a potential for spinal stability.Nolte LP, Steffen R, Mickley K(FRG)

10:30 A3 In vivo measurements at spinalstabilization implants.Wilke HJ, Claes L, Worsdorfer O(FRG)

10:45 A4 Fatigue properties of lumbarfixation devices.Wittenberg RH, Coffee MS, SwartzDE, Edwards WT, White AA, HayesWC (USA)

11:00 A5 The Evaluation of effects ofpulling angle and force onintermittent cervical traction.Ju MS, Shai RZ, Chou YL(REPUBLIC OF CHINA)

SESSION B1:BONE REMODELLING

Chairmen: Melsen F (DK)OdgaardA (DK)

B1 Periosteal and endosteal controlof bone remodeling undertorsional loading.CowinSC (USA)

The validity of strain adaptivebone remodeling hypothesis tes-ted against the Turkey ulna modelin torsion and compression.Weinans H, Rietbergen B, Batson S,Huiskes R, Grootenboer HJ (THENETHERLANDS)

Adaptation of mature rat tibia inresponse to repetitive loading.Forwood MR, Parker AW(AUSTRALIA)

Microstructural developmentfrom foetus to maturity and itsinfluence on the mechanicalproperties of cortical bone in theyoung racehorse.Shah D, Riggs CM, Evans GP,Bonfield W (UNITED KINGDOM)

Functional associations in corticalbone between collagen orienta-tion, mechanical properties and invivo strain history.Riggs CM, Evans GP, Shah D,Bonfield W, Lanyon LE, VaughanLC, Boyde A (UNITED KINGDOM)

SESSION C1:HEART VALVES

Chairmen: Reul H (FRG)HasenkamJM (DK)

C1 Pulsatile flow investigations ofmechanical and biologicalprosthesis of cardiac valves.Klimes F (CZECHOSLOVAKIA)

C2 A comparison of conduit heartvalves in pulsatile flow.Gentle CR (UNITED KINGDOM)

C3 Hydrodynamic function of secondgeneration mechanical and bio-prosthetic heart valves.Butterfield M, Fisher J, Davies GA,Kearney JN (UNITED KINGDOM)

C4 A new application of colorDoppler M-mode: regurgitantvolume calculation by the prox-imal flow convergence technique.Cape EG, Levine RA, YoganathanAP (USA)

C5 Dynamic visualization of velocityprofiles in the ascending aorta inhumans with normal aortic valvesand after insertion of artificialaortic valves.Paulsen PK, Hasenkam JM,Albrechtsen O (DENMARK)

SESSION A2:SPINE II

Chairmen: Dickson RA (UK)Hinsenkamp M (B)

11:45 A6 The analysis of spine kinematicsusing digital videofluoroscopy.Breen AC, Humphreys K, Rice S,Cheung P, Osborne A (UNITEDKINGDOM)

12:00 A7 Biomechanics of the humanlumbar spine: effects of alterationin the bone rigidity.Shirazi-AdIA (CANADA)

12:15 A8 A technique for quantifyingbending moment acting on thelumbar spine in-vivo.Adams MA, Dolan P (UNITEDKINGDOM)

12:30 A9 The influence of lumbar and hipsagittal mobility on the bendingmoment acting on the lumbarspine.Dolan P, Adams MA (UNITEDKINGDOM)

SESSION B2:SHOULDER

Chairmen: Kolbel R (FRG)S0jbjerg JO (DK)

B6 Measurement of three-dimen-sional motion of the upper limbduring functional activities.Barker TM, Nicol AC, Kelly IG(UNITED KINGDOM)

B7 The loading of the shoulder girdlemuscles in consequence of aglenohumeral arthrodesis; amodel simulation.van der Helm FCT, Pronk GM (THENETHERLANDS)

B8 Estimation of multidirectionalshoulder instability.Helmig P, Sojbjerg JO, Kjaersgaard-Andersen P (DENMARK)

B9 The influence of atmosphericpressure on shoulder stability.Browne AO, Hoffmeyer P, MorreyBF, An KN (USA)

SESSION C2:PRESERVATION AND HEAT

EFFECTS ON BONE

Chairmen: Meunier A (F)von Versen R (GDR)

C6 Bone stability after lyophilisationand gamma-irradiation in argonatmosphere.Jerosch J, Clahsen H, Muchow H(FRG)

C7 Effects of preservation andsterilization on the biomechanicalproperties of cortical bone grafts.Voggenreiter G, Ascherl R, SchererMA, Fruh HJ, Balk O, Blumel G(FRG)

C8 Bone-cement interface tempera-ture profiles of simplex and SCH-457, LVC bone cement.Harving S, Soballe K, Bunger C(DENMARK)

C9 On the problem of heat gene-ration in bone cutting.Toksvig-Larsen S, Ryd L, LindstrandA (SWEDEN)

CLINICAL BIOMECHANICS AWARD

Chairman: Ryd L, Lund, SWEDEN

Clinical Award Committee:

Cappozzo A, Dickson RA, Hinsenkamp MKolbel R, Ryd L, Sojbjerg JO

13:45 A10 Laboratory study to design an improved suture technique.Mashadi ZB, Amis AA, UNITED KINGDOM

14:00 A11 Biomechanical assessment of pedicle bridge fixation of the Hartshillspinal system.Rahmatalla A, Valentine N, Hasting GW, Dove J, UNITED KINGDOM

14:15 A12 The effect of controlled axial micromovement on the healing oftibial fractures.Cunningham JL, White SH, Kenwright J, Richardson JB, Adams MA,Goodship AE, UNITED KINGDOM

14:30 A13 Evaluation of a new prosthesis interface surface geometry.Goldstein SA, Matthews LS, Choi K, Jepsen K, Sweet K, USA

14:45 A14 The initial stability of hip prostheses in combination with femoralintramedullary bone grafts.Schreurs BW, Huiskes R, Slooff TJJH, THE NETHERLANDS

Time SESSION A3:HIP I

Chairmen: Schneider E (CH)Kjaersgaard-Andersen P (DK)

15:15 A15 Analysis of cemented hip jointreplacements and consequencesfor endoprosthetic design.KoellerW (FRG)

15:30 A16 Implant stability of porous coatedtotal hip acetabular components:a mechanical study of micro-movement and subsidence.Stiehl JB, Skrade DA (USA)

15:45 A17 Pre-stresses generated inacetabular bone by screwed-cupfixation in THA.Dalstra M, Huiskes R (THENETHERLANDS)

16:00 A18 Histological response of the boneto the thrust plate prosthesis(TPP).Huggler A, Bereiter H, Jacob H,Schenk R (SWITZERLAND)

SESSION B3:TENDONS

Chairmen: Claes L (FRG)ViidikA (DK)

B10 An investigation of the bio-mechanics of equine flexortendon loading using an implant-able micro force transducer.Platt D, Wilson A, Wright IM,Goodship AE (UNITED KINGDOM)

B11 Computation of in vivo strainpatterns of the suspensoryligament and its extensorbranches in the fore digit of thehorse.Jansen MO, van Buiten A, van denBogert AJ (THE NETHERLANDS)

B12 Ground reaction force analysis asan aid to diagnosis of equinedigital flexor tendon strain.DowSM (UNITED KINGDOM)

B13 Fibril mechanics suggest unevenstress distribution in the equinedigital flexor tendons.Wilmink JW, Wilson AM, GoodshipAE (UNITED KINGDOM)

SESSION C3:EXPERIMENTAL ORTHOPAEDICS

Chairmen: Djurhuus JC (DK)Hansen ES (DK)

C10 The effect of a meniscusprosthesis on knee biomechanicsand cartilage: an experimentalstudy.Sommerlath K, Gillquist J (SWE-DEN)

C11 A modular endoprosthetic systemfor bone tumor management.Verkerke GJ, Veth RPH, Koops HS,Nielsen HKL, Oldhoff J, Postma A,van den Kroonenberg HH,Grootenboer HJ (THE NETHER-LANDS)

C12 Design of an ischaemic doubleflap model. An investigation ofblood flow and biomechanicalproperties.Quirinia A, Jensen FT, Viidik A(DENMARK)

C13 The effects of quadriceps fatigueon the technique of lifting.Trafimow JH, Schipplein OD, NovakGJ, Andersson GBJ (USA)

SESSION A4:HIP II

Chairmen: Huiskes R (NL)Rohlmann A (FRG)

A19 Experimental and numericalinvestigation of system femur -endoprosthesis.Jirova J, Baumannova T, Maca J(CZECHOSLOVAKIA)

A20 FEM analysis of hip prostheses:validity of the 2-0 side-platemodel and the effects of torsion.Verdonschot N, Huiskes R (THENETHERLANDS)

A21 Finite element model of a femurwith a proximally fixed, cement-less stem.Men B, Schenk RK, Wintermantel E(SWITZERLAND)

A22 A parametric finite-elementanalysis of the influence of thestem-cement interface in total hipreplacement.Clift SE, Miles AW (UNITED KING-DOM)

SESSION B4:HAND AND WRIST

Chairmen: Amis A (UK)S0jbjergJO (DK)

B14 Surface shape variation betweenmetacarpophalangeal joints.Marsden DC, Nicol AC (UNITEDKINGDOM)

B15 The mechanical properties of theequine superficial flexor tendon.Wilson AM, Goodship AE (UNITEDKINGDOM)

B16 Elastic modulus and 'zero-force'length in carpal ligaments.Savelberg HHCM, Kooloos JGM,Huiskes R, Kauer JMG (THENETHERLANDS)

B17 Biomechanics of the fingerextensor apparatus.Garcia-Elias M, An KN, Berglund L,Linscheid RL, Cooney WP, ChaoEYS (USA)

SESSION C4:VASCULAR HAEMODYNAMICS

Chairmen: Yoganathan AP (USA)Paulsen PK (DK)

C14 Pulsatile flow visualization in amodel of the human abdominalaorta and aortic bifurcationsimulating rest and exerciseconditions.Pedersen EM, Yoganathan AP,LefevbreX (DENMARK)

C15 Hydrodynamic aspects of theclotting of blood and milk at flowobstructions.Christy JRE, MacLeod N (UNITEDKINGDOM)

C16 Three-dimensional visualization ofvelocity profiles in the porcinepulmonary trunk.Somod L, Hasenkam JM, Kim Y,Nygaard H, Paulsen PK (DEN-MARK)

C17 Comparison of the haemo-dynamic effects of electrical calfstimulation and the venous footpump.Laverick MD, McGivern RC, CromeMD, Murtagh B, Mollan RAB(UNITED KINGDOM)

SESSION A5:TRABECULAR BONE

Chairmen: Cowin SC (USA)Hvid I (DK)

A23 Predicting the mechanicalbehavior of bone.Keller TS, Spengler DM (USA)

A24 The underestimation of Young'smodulus in compressive testingof cancellous bone specimens.OdgaardA, Linde F (DENMARK)

A25 The effect of specimen size andgeometry on the mechanicalbehavior of trabecular bone.Linde F, Hvid I, Madsen F (DEN-MARK)

A26 Mechanical variation in theacetabulum of the normal humanpelvis.Evans GP, Bonfield W (UNITEDKINGDOM)

A27 Trabecular bone of the humanfemoral head in females.Deligianni D, Tanner KE, Missirlis Y.Bonfield W (UNITED KINGDOM)

SESSION B5:MOTION ANALYSIS

Chairmen: Grood ES (USA)Nielsen S (DK)

B18 Three dimensional analysis of thesegmental movements of humanbody during gait.Hirose S, Sawai K, Hattori T, Yama-moto T, Niwa S (JAPAN)

B19 Integrated analysis and synthesisof human motion.Meglan D, Berme N, Simon SR(USA)

B20 Instantaneous moment arms andnet joint kinetics.Woltring HJ, Spoor CW (THENETHERLANDS)

B21 Simultaneous measurement of alltranslations and rotations inspace.Durselen L, Claes L (FRG)

B22 TV / computer motion analysissystems: marker data tracking inreal time.Furnee EH (THE NETHERLANDS)

SESSION C5:BIOMATERIALS

Chairmen: Lee AJC (UK)Bonfield W (UK)

C18 Tribological behaviour of a newwear couple: ODH-treated TiAINb-alloy against UHMWPE.Streicher RM, Weber H, Schoen R,Semlitsch MF (SWITZERLAND)

C19 Contact mechanics of low elasticmodulus layers in 'cushion form'bearings for artificial hip joints.Dowson D, Fisher J, Jobbins B,O'Carrol S, Jin ZM (UNITED KING-DOM)

C20 Testing carbon fibre reinforcedacetabulum cups in a hip jointsimulator.Plitz W, Walter A, Siebels W (FRG)

C21 The use of semisyntheticbiodegradable polymers fororthopaedic applications.lannace S, Ambrosio L Nicolais LRastrelli A. Pastorello A (ITALY)

C22 Changes in the molecular weightdistributions of amorphous andcrystalline poly (L-lactide) duringdegradation in vivo.Bendix D (FRG)

SESSION A6:BONE IMPLANTS I

Chairmen: Walker P (UK)Soballe K (DK)

A28 Tissue ingrowth into titanium andhydroxyapatite coated implantsduring stable and unstableconditions.Seballe K, Hansen ES, RasmussenHB, Jorgensen PH, Bunger C (DEN-MARK)

A29 Enhancement of fixation ofporous-coated implants in thepresence of interface gaps whentreated with autograft, freezedried allograft and fibrin glue.KienapfelH, Sumner DR, Turner TM,Urban RM, McLeod BC, Skipor AK,Yang A, Galante JO (USA)

A30 Micromotion of the Miller-Galantetibial component.Ryd L, Carlsson L, Herberts P(SWEDEN)

A31 Gross movement of flexiblecondylar prosthesis under shearand torsional loading.Wevers HW, Dujovne AR (CANA-DA)

A32 Postoperative instability of tibialcomponents.Ryd L, Toksvig-Larsen S, StenstromA, Carlsson L, Herberts P, Selvik G(SWEDEN)

SESSION B6:LIGAMENTS

Chairmen: Goodship AE (UK)ViidikA (DK)

B23 Tensile stress-strain behavior ofthe anterior longitudinal ligament.Keller TS, Neumann P, Ekstrom L,Perry L, Hansson T (USA)

B24 Light and electron microscopicalterations and their relation tomechanical properties in thepatellar tendon autograft afterposterior cruciate ligamentreplacement.Bosch U, Decker B, Kasperczyk W,Nerlich A, Oestern HJ, Tscherne H(FRG)

B25 Development of more realisticligament implant structures.Amis AA, Radford WJP (UNITEDKINGDOM)

B26 Medial collateral ligamentreplacement by processed dermalsheep collagen (PDSC): anexperimental study in rabbits.Wiersma PH, Tilon P, Klopper PJ(THE NETHERLANDS)

B27 Signal properties of mechano-receptive afferents in the catanterior cruciate ligament.BrandRA, Koel KJ, Daley BJ, TearseDS, Pope DF (USA)

SESSION C6:GAIT

Chairmen: Cappozzo A (I)Bergmann G (FRG)

C23 Energy efficiency of different footprosthesis during stance phase ofwalking and jogging.Glitsch U, Baumann W (FRG)

C24 Dynamic analysis of prostheticgait using only joint sagittalrotations as input.Thunnissen JGN, Grootenboer HJ,de Jongh HJ, Koopman HFJM(THE NETHERLANDS)

C25 Modulation of H-reflexes duringhopping and jumping tasks.Dyhre-Poulsen P, Simonsen EB(DENMARK)

C26 Modulation of H-reflexes duringwalking and running.Simonsen EB, Dyhre-Poulsen P(DENMARK)

C27 Gait parameters of patients withosteoarthritis before and afterphysical therapy.Wiedmer L, Knusel O, Baumen-gartnerW (SWITZERLAND)

SESSION A7:BONE IMPLANTS II

Chairmen: Soltesz U (FRG)SoballeK (DK)

A33 The influence of various titaniumsurfaces on the interface shearstrength between implants andbone.Claes L, Wilke HJ, Steinemann S(FRG)

A34 A shape optimized prosthesissurface: theory and experiment.Mattheck C, Erb D, Schubert K(FRG)

A35 Biomechanics of a pull-out test:evaluation of the interfacestresses.Shirazi-AdIA (CANADA)

A36 Surface flatness after orthopaedicbone cutting.Toksvig-Larsen S, Ryd L (SWEDEN)

SESSION B7:JOINT LOAD

Chairmen: An KN (USA)Walker P (UK)

B28 A 2D finite element contactanalysis of the patello-femoraljoint.HeegaardJH, Curnier A, Leyvraz PF,Raktomanana L (SWITZERLAND)

B29 Direct measurements of tibio-femoral contact pressures forvarious deformities of the knee.Schmotzer H, Vaughan CL, Lear-month ID (USA)

B30 The contact and the deflection ofthe talo-crural joint.Inaba H, Arai M (JAPAN)

B31 Distribution of pressure in theradiocarpal joint after maluniteddistal radius fracture.Ziger T, Nikolic V, Bilic R, ZdravkovicV (YUGOSLAVIA)

SESSION C7:DENTAL MECHANICS

Chairmen: M0ller E (DK)Petersen SS (DK)

C28 Force dependent tooth move-ments measured on human au-topsy material.Pedersen EH, Andersen KL, MelsenB (DENMARK)

C29 A method for estimating chewing-forces from elevator-muscleactivity.Proschel P, Ohkawa S, HardtmannG, Ott R (FRG)

C30 The temporomandibular joint: anin vivo experiment for locating theinstantaneous center of rotation.Falkenstrom CH, Boering G, CoolJC, Furnee EH (THE NETHER-LANDS)

C31 A technique to measure, analyzeand describe the three-dimensional kinematics of thehuman temporomandibular joint.Siegler S, Nicolella D, Kim H,Fielding A, Hayes R (USA)

SESSION A8:KNEE

Chairmen: Blankevoort L (NL)Nielsen S (DK)

A37 Parametric validation of a 3-Dknee joint model.Blankevoort L, Huiskes R (THENETHERLANDS)

A38 Validation of a three-dimensionalknee motion assessment system.Deluzio K, Wyss UP, Li J, CostiganPA (CANADA)

A39 Automatic analysis of kneeligaments using double exposureholography.ZhiH, Wredmark T, Willers U, DirtoftI, Johansson RB (SWEDEN)

A40 The effects of selected musclegroups on knee pressuredistribution.Schmotzer H, Learmonth ID,Vaughan CL (USA)

A41 Electromyographic measurementsof muscle coordination in anteriorcruciate ligament (ACL) injuredsubjects.Sinkjaer T, Arendt-Nielsen L, LeFevre S, Petersen ML, Kaalund S,Lass P (DENMARK)

SESSION B8:BONE I

Chairmen: Currey JD (UK)OdgaardA (DK)

B32 The pelvic bone as a sandwichconstruction; a three dimensionalfinite element study.Dalstra M, Huiskes R (THENETHERLANDS)

B33 Determination of directionaldependence of orthotropicmaterial properties in a mandible.Andersen KL, Pedersen EH, MelsenB (DENMARK)

B34 Distribution of lamellae in theshafts of the superior limb withreference to mechanical proper-ties.Barbos MP, Carando S, Ascenzi A,BoydeA (ITALY)

B35 Comparative stress analysis ofthe sheep femur under physio-logical loading conditions.BezerianosAG, Panagiotopoulos EC(GREECE)

B36 Ontogenetic changes in themechanical properties of thepolar bear Ursus Maratimus.Brear K, Currey JD, Pond CM(UNITED KINGDOM)

SESSION C8:FOOT

Chairmen: Jacob HAC (CH)Kjaersgaard-Andersen P (DK)

C32 Forces in the forefoot duringlocomotion.Jacob HAC (SWITZERLAND)

C33 Footsole pressures during bare-foot walking.Janssen M, de Lange A, BisschoffM (THE NETHERLANDS)

C34 Foot strike pattern in the highheel gait.Kim W, Voloshin AS, Medvetz L(USA)

C35 Ground reaction forces duringvarious stopping technique insporting activities.Millbank SF, Nicol AC (UNITEDKINGDOM)

C36 Analysis of gait asymmetry innormals by dynamic pedography.Mittlmeier T, Fassler M, Lob G,Mutschler W, Bauer G (FRG)

SESSION A9:FRACTURE HEALING I

Chairmen: Goodship A (UK)Andreassen TT (DK)

A42 Effects of delayed axialdynamization on healing ofunstable experimental fractures inthe canine tibia.Aro HJ, Chao EYS (USA)

A43 Fracture stiffness in tibial fracturemanagement.Richardson JB, Breemans E, Cun-ningham J, Kenwright J (UNITEDKINGDOM)

A44 In vivo load measurements bymeans of an instrumentedinterlocking nail.Schneider E, Michel MC, Genge M,Wyder D (SWITZERLAND)

A45 Torsional strength of intra-medullary-nai led humeralfractures in comparison withintact human bone.Hearn TC, Beverland DE, Broek-huyse H, Cuncins A, Kellam JF,Patel A (CANADA)

A46 Parametric numerical designoptimization of internal fixationplates.Gasser B, Perren SM (SWITZER-LAND)

SESSION B9:HIP III

Chairmen: Walker P (UK)Kjaersgaard-Andersen P (DK)

B37 The influence of different fixationtypes on stem and bone stressesin total hip replacement.Schmotzer H, Dall DM (USA)

B38 Three-dimensional determinationof an oblique osteotomy in thehip by mathematical optimization.Eck M, Hoschek J, Weber U (FRG)

B39 The function of 65 total hipreplacement patients.Rowe PJ, Nicol AC, Kelly IG(UNITED KINGDOM)

B40 The influence of floor materialsand shoes on the hip jointloading.Bergmann G, Kniggendorf H, Rohl-mann A, Graichen F, Jendrzynski H(FRG)

B41 Telemetry of strain in-vivo from aproximal femoral replacement.Taylor SJ, Meswania JM (UNITEDKINGDOM)

SESSION C9:BONE II

Chairmen: Goldstein SA (USA)Linde F (DK)

C37 The constant stress hypothesisas a rule for the computer simu-lation of growth.C. Mattheck, Burkhardt S, Erb D,Huber-Betzer H (FRG)

C38 The distribution of the trabecularvolume fraction and orientation ofcancellous bone after simplifiedapproaching model under stressdispersion.Yamamoto H, Hirai T, Katayama T,Inoue N, Andou Y (JAPAN)

C39 Use of the thermoelastic stressanalysis as a new approach inbone biomechanics.Reymen L, Bourgois R, Boulvin S,Wagner J (BELGIUM)

C40 Use of the thermoelastic stressanalysis as a new approach inbone biomechanics application tothe pelvis.Boulvin S, Wagner J, Reymen L,Bourgois R (BELGIUM)

SESSION A10:FRACTURE HEALING II

Chairmen: Goodship A (UK)Andreassen TT (DK)

A47 Transphyseal biodegradablefixation of physeal fractures withself-reinforced polyglycolide (SR-PGA) pins in children.Makela EA, Bostman O, KekomakiM, Vainio J, Tormala P, RokkanenP (FINLAND)

A48 The application of guided tissueregeneration to gap healing inrabbit radius.Nielsen FF, Karring T, Gogolewski S(DENMARK)

A49 Stress protection on the sheeptibia using an Oxford Mkllexternal fixator.Butler SP, O'Doherty D, GoodshipAE (UNITED KINGDOM)

A50 The effects of a single sidedexternal fixator on functionalstrainsin the ovine tibia.O'Doherty DM, Butler SP, GoodshipAE (UNITED KINGDOM)

SESSION B10:IMPLANTS

IN CANCELLOUS BONE

Chairmen: Schneider E (CH)Keller TS (USA)

B42 Investigation of micromovementat the bone-implant interfaceusing holographic interferometry.Shelton JC, Bonfield W (UNITEDKINGDOM)

B43 A comparison of the holdingpower of bone screws in healthyand diseased cancellous bone.Turner IG, Rice GN (UNITEDKINGDOM)

B44 Comparison of bovine, humanand synthetic cancellous bone inthe assessment of bone screwholding strength.Hearn TC, Surowiak JF, Schatzker J,WolfsonN (CANADA)

B45 The effect of screw design andbone mineral density on trans-pedicular fixation in human andcalf vertebral bodies.Wittenberg RH, Lee KS, Coffee MS,White AA, Hayes WC (FRG)

SESSION C10:MUSCLES

Chairmen: Arendt-Nielsen L (DK)Bunger CE (DK)

C41 EMG characteristics of stabilizingfunction of upper extremitymuscles.Kornecki S, Mularczyk W, TrzcinskiM, Zschorlich V (POLAND)

C42 Quantitative assessment ofdynamic muscle fatigue by elec-tromyographic measurements.Arendt-Nielsen L, Sinkjaer T(DENMARK)

C43 An investigation of acousticmyography (AMG) during volun-tary isometric contraction withand without fatigue.Mealing D, Lauvring K, Borresen B,Poulsen P (UNITED KINGDOM)

C44 In vivo determination of thecompliance of the passive serieselastic component of humanquadriceps femoris muscle.VoigtM (DENMARK)

BONE

P1 Mechanical properties of tra-becular bone. Dependence onstrain rate.Linde F, Norgaard P, Hvid I,Odgaard A, Seballe K (DENMARK)

P2 Tensile and compressive proper-ties of cancellous bone.Larsen E, Rehl L, Linde F, OdgaardA (DENMARK)

P3 Building morphologically exactmechanical models for cancellousbone.Fyhrie DP, Hollister SJ (USA)

P4 Fast three-dimensional serialreconstruction of trabecular bonespecimens.Odgaard A, Andersen K, Melsen F,Gundersen HJG (DENMARK)

P5 Microstructural characterizationand X-ray microanalysis of humanbones.Armand C, Dorlot JM, Meunier A,Yahia LH (CANADA)

P6 The multiplanar trabeculararchitecture of bone studied bycomputer reconstruction.Merolli A, Tranquilli LP, Gabbi C(ITALY)

P7 Effect of inflammatory disease onthe mechanical properties ofsubchondral and trabecular bone.Tanner KE, Sharp DJ, Warren NP,Coombs RRH, Bonfield W (UNITEDKINGDOM)

P8 On the friction characteristics atthe bone-metal interface in aporous knee implant - anexperimental study.Shirazi-Adl A, Rancourt D, PaiementG, Drouin G (CANADA)

P9 The bone movement chamber.Aspenberg P, Toksvig-Larsen S, RydL, Albrektsson T (SWEDEN)

P10 Effects of irradiation and ethyleneoxide sterilization on fresh frozenand freeze dried human achillestendons.Rauch G, Gebersdorf M, Dorner P,Griss P (FRG)

P11 Framework-trees.Mattheck C, Burkhardt S (FRG)

CARTILAGE

P12 The effect of cavitation on adult,infant and bovine articularcartilage: a quantitative study.Watson P, Kernohan WG, MollanRAB, Carr KE, Gilmore RSC(UNITED KINGDOM)

P13 Microcomputer-controlled carti-lage testing device.Rasanen T, Arokoski J, Jurvelin J,Helminen HJ (FINLAND)

FRACTURE

P14 Biodegradable fixation of dia-physeal femoral osteotomy: anexperimental study on growingdogs.Miettinen H, Makela A, Vainio J(FINLAND)

P15 Structure changes of bone afterfracture healing treated with platefixation.Xu XX, Wang Y, Liu JG, Zhao YH(PEOPLES REPUBLIC OF CHINA)

COLLAGEN

P16 Effects of lyophilization andgamma radiations on mechanicalproperties of tendon allografts.Kerboull L, Meunier A, Christel P(FRANCE)

P17 Biomechanical properties ofpreserved soft tissue allografts.von Versen R, Freistedt B, Schim-mack L (GDR)

P18 Design and characterization of abiodegradablecompositetendomprosthesis.Ambrosio L, lannace S, Nicolais L.Guida G, Ronca D. Davis PA. HuangSJ (ITALY)

P19 Non-invasive testing of humanmechanical skin impedance.Arendt-Nielsen L, Bjerring P (DEN-MARK)

JOINT

P20 Isokinetic assessment of theeffects of significant hamstringinjury in professional soccerplayers.Paton RW, Grimshaw P, Noble J(UNITED KINGDOM)

P21 Instrumented spatial linkagemeasurement of the human jointmotion with a kinematic screwbased analysis technique.Meglan JF, Meglan D, Berme N(USA)

P22 Subchondral bone density andarthroscopic findings in thefemoropatellar joint.Putz R, Eckstein F, Muller-Gerbl M,Benedetto K (FRG)

P23 The intracompartmental pressureof the anterior tibial compartmentduring walking at differentspeeds.Jerosch J, Castro WHM, Debus S(FRG)

P24 Assessment of the patellofemoralarticulation by vibration arthro-metry.Barr DA, Hamilton A, Maginn P,Watson P, Kernohan WG, MollanRAB (UNITED KINGDOM)

P25 Late artificial meniscus implanta-tion in an osteoarthritic knee: anexperimental study in rabbits.Sommerlath K, Gillquist J (SWE-DEN)

P26 Patellar stress prediction bymathematical simulation.Lengsfeld M, Dorner P, Griss P(FRG)

P27 Biomechanics of semi-constrain-ed total elbow arthroplasty.O'Driscoll SW, An KN, Korinek SL,Morrey BF (USA)

HAND AND WRIST

P28 Hand fractures: an "in vivo"biomechanical study.Schuind F, Donkerwolcke M, BurnyF (BELGIUM)

P29 Gaussian indicator of precision ofhand's movement.Jaworek K, Rutkowska-KucharskaA,BoberT (POLAND)

P30 A biomechanical study of thedistal radioulnar ligaments.Schuind F, An KN, Berglund L, ReyR, Linscheid RL, Chao EYS (USA)

P31 An in-vivo 3-D kinematic study ofthe metacarpo-phalangeal joint.Fioretti S, Leo T, Merolli A, TranquilliLP (ITALY)

P32 Geometric modelling for meta-carpophalangeal joint prosthesisstems.Marsden DC, Nicol AC (UNITEDKINGDOM)

HIP

P33 Characterization of high viscosityacrylic bone cement.Reindel ES, Higgs G, Hadjari M,ConveryFR (USA)

P34 The influence of primary cement-less THA and revision THA ontibial bone mineral content andcross sectional geometry in acanine model.Gothgen CB, Sumner DR, Platz C,Turner TM, Galante JO (USA)

P35 Change in bony coverage ofacetabular cups as a function ofprosthesis placement.Bechtold JE, Gustilo RB, RobinsonHR, Weisman I (USA)

P36 Strain analysis of a femur withdifferent implants: the repro-ducible and comparative aspectof the measures.Delecrin J, Passuti N, Royer J,Bainvel JV (FRANCE)

P37 The effect of stem designvariables on strain in the femur -a photoelastic coating study.Hua J, Walker PS (UNITED KING-DOM)

P38 Micromotion between fourfemoral stem designs in caninecadaveric femora and six ortwenty-four monts after surgicalimplantation.Anderson Gl, Hearn TC, Cuncins A,Waddell JP, Richards RR, Ling H(CANADA)

P39 On the fracture of femoralcomponent of cementless totalhip joint prosthesis.Toshev Y, Lalova V (BULGARIA)

P40 Stress distribution after cementedstem implantation of the Marburgtotal hip endoprostheses system.Dorner P, Lengsfeld M, Rauch G,Rossband H, Griss P (FRG)

P41 Resultant forces of muscles andjoint at the hip joint. Analyses ofindividual muscle functions.Muller-Gerbl M, Dunkelberg D,Ennemoser 0 (FRG)

P42 A biomechanical analysis of theimplanted human femur usingholography.Katz D, Tanner KE, Bonfield W(UNITED KINGDOM)

P43 Mechanical aspect of 3-dimen-sional modeling of femoral loads.Bignardi C, Gielo-Perczak K (ITALY)

GAIT AND MOTION ANALYSIS

P44 Video device for an automaticmotion analysis system.Hattori T, Hirose S, Sawai K, MitsuiT, Niwa S (JAPAN)

P45 Stability properties of runningshoes.Wijlens R, van der Zande M, deLange A (THE NETHERLANDS)

P46 Friction during basketball mo-tions.Winkelmolen W, de Lange A,Kloosterboer J (THE NETHER-LANDS)

P47 Shock-absorption properties ofrunning shoes.van der Zande M, Wijlens R, deLange A (THE NETHERLANDS)

P48 Reproducibility of pressure distri-bution under the feet during gait.van den Broeck C, Peeraer L,Stevens P, Stijns H (BELGIUM)

P49 A biomechanical analysis systemutilizing the dynamic pedobaro-grah and synchronised video.WalkerLT, NicolAC (UNITED KING-DOM)

P50 The mechanical behavior of therunning shoe midsole and the hellpad at heel strike during arunning step: a cineradiographicmethod.De Clercq D, Aerts P, Claeys R,Junnen M (BELGIUM)

P51 Objective assessment of rising tostand and sitting down in patientswith hemiplegia due to cerebro-vascular disease.Durward BR, Rowe PJ, Nicol AC,Pentland B (UNITED KINGDOM)

SPINE AND MISCELLANEOUS

P52 Rheological properties of thehuman lumbar spine ligaments.Yahia LH, Audet J, Drouin G,Newman N (CANADA)

P53 Computer-guided loading and 3D-on-line measurements of motionof the human spine afterdestabilizing surgical treatment.Kortmann HR, Engwicht B,Lindmuller U, Wolter D (FRG)

P54 Failure analysis of a beam-columnunder oblique-eccentric loadingpontential failure surfaces forcervical spine trauma.Dai QG, Liu YK (USA)

P55 Preliminary studies with amechanical model for the evalua-tion of spinal motion palpation.Byfield D, Harvey D (UNITEDKINGDOM)

P56 Investigations of the displace-ments of vertebral elements bymeans of holographic interfero-metry.Bedzinski R (POLAND)

P57 A neural model for generatingmotor synergies.Morasso P, Sanguineti V (ITALY)

P58 The biomechanical parameters ofchosen limb segments duringchild growth.Lebiedowska MK, Polisiakiewicz A,Ekiel J (POLAND)

HAEMODYNAMICS

P59 Velocity profile registration with atnew perivascular Doppler ultra-sound transducer. Comparisonwith hot-film anemometry.Hasenkam JM, Nygaard H,Pedersen EM, Paulsen PK(DENMARK)

P60 The mechanism of systolicanterior motion in obstructivehypertrophic cardiomyopathy: in-vitro steady and pulsatile flowexperiments.Lefebvre XP, Cagniot A, GiesekingER, Levine RA, Yoganathan AP(USA)

P61 The study of mechanical proper-ties of porcine aortic valve leafletstreated by glutaraldehyde(PAVLTG)Liu ZG, Liu WY (PEOPLES RE-PUBLIC OF CHINA)

P62 In vitro-simulation of cardio-vascular flows.KohlerJ, Kupper HD, Wirtz R (FRG)

P63 Use of doppler ultrasound forearly pregnancy diagnosis indairy cattle.Waite LR, Ford SP, Young DF,ConleyAJ (USA)

P64 Velocity field and turbulent shearstress distribution downstream oftwo biological aortic valveprostheses in vitroNygaard H, Giersiepen M,Hasenkam JM, Reul H, Paulsen PK,Rovsing PE (DENMARK)

P65 Influence of pulsatility on thedevelopment of intracardiac jets:an in vitro laser Doppler study.Delouche A, Diebold B, Abergel E,Delouche P, Dumee P, Peronneau P(FRANCE)

P66 Varicose meandering: an indirectsign of locally increased arterialflow transmitted by arteriovenouscommunications. (AVC's).Schalin L, Liepsch D (SWEDEN)

MANDIBLE

P67 The structural geometry of themandible in the areas of thefractures.Percac S, Nikolic V, Jo A(YUGOSLAVIA)

P68 Stress and strain in theperiodontal ligament followingorthodontic forces analyzed bymeans of the finite elementsmethods.Andersen KL, Pedersen EH, MelsenB (DENMARK)