2016
Primary Care Physician and Patient Perceptions of Reimbursement for Total Knee and Hip Replacement
Wiznia DH, Kim CY, Wang Y, Swami N, Pelker RR. Primary Care Physician and Patient Perceptions of Reimbursement for Total Knee and Hip Replacement. The Journal Of Arthroplasty 2016, 31: 1395-1399. PMID: 27036921, DOI: 10.1016/j.arth.2015.12.052.Peer-Reviewed Original ResearchConceptsTotal knee arthroplastyTotal hip arthroplastyOrthopaedic surgeonsOrthopaedic servicesPrimary care physicians' perceptionsHigher reimbursementPrimary care physiciansPostoperative patientsCare physiciansKnee arthroplastyPatients' perceptionsTotal kneePhysicians' perceptionsHip arthroplastyOrthopedic proceduresHip replacementWeb-based surveyPatientsSurgeonsReimbursement valuesLarger practicesPaper-based surveyFurther studiesSignificant differencesArthroplasty
2007
Current Practices of AAHKS Members in the Treatment of Adult Osteonecrosis of the Femoral Head
McGrory BJ, York SC, Iorio R, Macaulay W, Pelker RR, Parsley BS, Teeny SM. Current Practices of AAHKS Members in the Treatment of Adult Osteonecrosis of the Femoral Head. Journal Of Bone And Joint Surgery 2007, 89: 1194-1204. DOI: 10.2106/00004623-200706000-00006.Peer-Reviewed Original ResearchConceptsFemoral headHigh-volume arthroplasty surgeonsSteinberg classification systemCollaborative multicenter studyCare of adultsHypothetical clinical scenariosAspects of careCurrent treatment practicesTotal hip replacementGroup of surgeonsAmerican orthopaedic surgeonsAdult osteonecrosisPostcollapse osteonecrosisPrecollapse osteonecrosisCore decompressionNonoperative managementAdult patientsMulticenter studyProspective studyKnee surgeryTreatment preferencesOsteonecrosisArthroplasty surgeonsKnee surgeonsClinical scenariosCurrent Practices of AAHKS Members in the Treatment of Adult Osteonecrosis of the Femoral Head
McGrory B, York S, Iorio R, Macaulay W, Pelker R, Parsley B, Teeny S. Current Practices of AAHKS Members in the Treatment of Adult Osteonecrosis of the Femoral Head. Journal Of Bone And Joint Surgery 2007, 89: 1194-1204. PMID: 17545421, DOI: 10.2106/jbjs.f.00302.Peer-Reviewed Original ResearchConceptsFemoral headHigh-volume arthroplasty surgeonsSteinberg classification systemCollaborative multicenter studyCare of adultsHypothetical clinical scenariosAspects of careCurrent treatment practicesTotal hip replacementGroup of surgeonsAmerican orthopaedic surgeonsAdult osteonecrosisPostcollapse osteonecrosisPrecollapse osteonecrosisCore decompressionNonoperative managementAdult patientsMulticenter studyProspective studyKnee surgeryTreatment preferencesOsteonecrosisArthroplasty surgeonsKnee surgeonsClinical scenarios
1997
Rollback in posterior cruciate ligament—retaining total knee arthroplasty A radiographic analysis
Kim H, Pelker R, Gibson D, Irving J, Lynch J. Rollback in posterior cruciate ligament—retaining total knee arthroplasty A radiographic analysis. The Journal Of Arthroplasty 1997, 12: 553-561. PMID: 9268796, DOI: 10.1016/s0883-5403(97)90179-0.Peer-Reviewed Original ResearchConceptsPosterior cruciate ligament-retaining total knee arthroplastyTotal knee arthroplastyPostoperative tibiofemoral anglePreoperative tibiofemoral angleTibiofemoral contact pointTibiofemoral angleKnee arthroplastyTibial trayPosterior tiltInterobserver reliability testDegree of translationRadiographic studiesPosterior translationDegrees flexionRadiographic analysisMean differenceRadiographic measurementsFull extensionArthroplastyTibiaAverage translationSame observerPatientsThe Nicolas Andry Award-1995 Fracture Healing; Radiation Induced Alterations
Pelker R, Friedlaender G. The Nicolas Andry Award-1995 Fracture Healing; Radiation Induced Alterations. Clinical Orthopaedics And Related Research® 1997, 341: 267-282. PMID: 9269183, DOI: 10.1097/00003086-199708000-00038.Peer-Reviewed Original ResearchConceptsIncidence of fracturesNonunion of fracturesDose fractionation schemesRadiation-Induced AlterationsNicolas Andry AwardSingle doseFractionation schemeClinical observationsAllogeneic boneFracture healingIrradiated boneControl groupFinal repairIncidenceInduced alterationsRat femur modelNonunionDegree of delayFracturesImmature levelBoneRepairEffects of radiationAnimalsRefracture
1993
Effects of prefracture irradiation on the biomechanical parameters of fracture healing
Widmann R, Pelker R, Friedlaender G, Panjabi M, Peschel R. Effects of prefracture irradiation on the biomechanical parameters of fracture healing. Journal Of Orthopaedic Research® 1993, 11: 422-428. PMID: 8326449, DOI: 10.1002/jor.1100110315.Peer-Reviewed Original ResearchPosterior Element Strength Six Months Postinjury in the Canine Cervical Spine
Southern E, Pelker R, Crisco J, Panjabi M. Posterior Element Strength Six Months Postinjury in the Canine Cervical Spine. Clinical Spine Surgery A Spine Publication 1993, 6: 155-161. PMID: 8504228, DOI: 10.1097/00002517-199304000-00010.Peer-Reviewed Original ResearchConceptsMaximum loadPosterior elementsExtensive surgery groupTension loadingCervical spine injuryC4-C5 levelDestructive testingRange of motionWeeks of healingDecreased stiffnessSurgery groupSham procedureSpine injuriesCanine cervical spineCervical spineIntervertebral levelSix monthsHealing periodInterspinous ligamentLoadControl valuesMotion testingBiomechanical propertiesBiomechanical studyInferior articular facets
1991
Postfracture irradiation effects on the biomechanical and histologic parameters of fracture healing
Brown R, Pelker R, Friedlaender G, Peschel R, Panjabi M. Postfracture irradiation effects on the biomechanical and histologic parameters of fracture healing. Journal Of Orthopaedic Research® 1991, 9: 876-882. PMID: 1919851, DOI: 10.1002/jor.1100090614.Peer-Reviewed Original ResearchConceptsFracture healingControl fracturesDelay groupMature Sprague-Dawley ratsClosed femoral fracturesLong-term resultsSprague-Dawley ratsContralateral intact femurFemoral fracturesHistologic parametersLocal irradiationFracture repairFractured femurRadiation exposureWeeksIntact femurBiomechanical propertiesRatsDeleterious effectsShort-term deleterious effectsFemurDaysFracturesHealingGroupThe Noncemented Porous-Coated Hip Prosthesis
BANDS R, PELKER R, SHINE J, BRADBURN H, MARGOLIS R, LEACH J. The Noncemented Porous-Coated Hip Prosthesis. Clinical Orthopaedics And Related Research® 1991, 269: 209-219. PMID: 1864041, DOI: 10.1097/00003086-199108000-00030.Peer-Reviewed Original ResearchConceptsTotal hip arthroplastyPorous-coated componentsFemoral stemHip arthroplastyMean Harris hip scorePorous-coated femoral stemDistal cortical hypertrophyHarris hip scoreExcellent resultsBipolar acetabular componentMean followPorous-coated femoralHip scoreThigh painRoentgenographic findingsCortical hypertrophyRetrospective studyRoentgenographic changesProximal femurBipolar endoprosthesesEntire groupAcetabular componentPatientsBone bridgingArthroplastyThe influence of ibuprofen on fracture repair: Biomechanical, biochemical, histologic, and histomorphometric parameters in rats
Huo M, Troiano N, Pelker R, Gundberg C, Friedlaender G. The influence of ibuprofen on fracture repair: Biomechanical, biochemical, histologic, and histomorphometric parameters in rats. Journal Of Orthopaedic Research® 1991, 9: 383-390. PMID: 2010842, DOI: 10.1002/jor.1100090310.Peer-Reviewed Original ResearchConceptsControl animalsHistomorphometric parametersFracture repairUnilateral femur fracturesMature Sprague-Dawley ratsSerum osteocalcin levelsCyclo-oxygenase inhibitorSprague-Dawley ratsBone formation rateInfluence of ibuprofenOral doseFemur fracturesOsteocalcin levelsClinical practiceBone volumeBone remodelingInhibitory effectSignificant alterationsFracture biomechanicsRatsAnimalsTail vertebraePresent studyIbuprofenRepair
1989
The effect of radiation on the fracture repair process. A biomechanical evaluation of a closed fracture in a rat model
Markbreiter L, Pelker R, Friedlaender G, Peschel R, Panjabi M. The effect of radiation on the fracture repair process. A biomechanical evaluation of a closed fracture in a rat model. Journal Of Orthopaedic Research® 1989, 7: 178-183. PMID: 2918417, DOI: 10.1002/jor.1100070204.Peer-Reviewed Original ResearchConceptsRat modelFemoral midshaft fractureBiomechanical parametersFracture repair processFracture healing processOpen fracture modelSingle doseMidshaft fracturesIntramedullary pinningClosed fracturesNormal controlsFracture healingControl groupNormal levelsSimilar fracturesBiomechanical evaluationHealing processExperimental groupWeeksFracturesRepair processTemporal progressionGroupEffects of radiationPrevious studies
1986
Fracture of the Axis Associated with Vertebral Artery Injury
PELKER R, DORFMAN G. Fracture of the Axis Associated with Vertebral Artery Injury. Spine 1986, 11: 621-623. PMID: 3787327, DOI: 10.1097/00007632-198607000-00015.Peer-Reviewed Original ResearchThree‐dimensional load‐displacement curves due to froces on the cervical spine
Panjabi M, Summers D, Pelker R, Videman T, Friedlaender G, Southwick W. Three‐dimensional load‐displacement curves due to froces on the cervical spine. Journal Of Orthopaedic Research® 1986, 4: 152-161. PMID: 3712124, DOI: 10.1002/jor.1100040203.Peer-Reviewed Original Research
1985
Effects of short‐term Cyclosporin‐A on biomechanical properties of intact and fractured bone in the rat
Warren S, Pelker R, Friedlaender G. Effects of short‐term Cyclosporin‐A on biomechanical properties of intact and fractured bone in the rat. Journal Of Orthopaedic Research® 1985, 3: 96-100. PMID: 3981300, DOI: 10.1002/jor.1100030112.Peer-Reviewed Original ResearchConceptsControl animalsSolid organ allograft survivalFracture repairCurrent biomechanical dataOrgan allograft survivalShort-term cyclosporinBiomechanical propertiesSolid organ transplantationEffect of cyclosporinShort-term clinical useMidshaft femoral fractureNew immunosuppressant drugsAllograft survivalFemoral fracturesBone turnoverRat modelSkeletal toxicityOrgan transplantationSystemic effectsHistomorphometric studyImmunosuppressant drugsIntramedullary pinBiologic effectsFractured femurCyclosporinChemotherapy‐induced alterations in the biomechanics of rat bone
Pelker R, Friedlaender G, Panjabi M, Markham T, Hausman M, Doganis A, McKay J. Chemotherapy‐induced alterations in the biomechanics of rat bone. Journal Of Orthopaedic Research® 1985, 3: 91-95. PMID: 3981299, DOI: 10.1002/jor.1100030111.Peer-Reviewed Original Research
1983
Biomechanical Properties of Bone Allografts
Pelker R, Friedlaender G, Markham T. Biomechanical Properties of Bone Allografts. Clinical Orthopaedics And Related Research® 1983, 174: 54-57. PMID: 6339144, DOI: 10.1097/00003086-198304000-00009.Peer-Reviewed Original ResearchConceptsOrthopaedic oncology serviceLow-grade tumorsPresence of recurrenceRelationship of complicationsMassachusetts General HospitalAllograft fractureOncology servicesAllograft implantationFunctional statusSkin sloughGeneral HospitalBone allograftIntramedullary rodFunctional restorationPatientsBenign conditionsResectionBone conditionsCadaveric segmentsComplicationsGraftBiomechanical propertiesTumorsMore yearsInfection
1982
The Correlation of Idiopathic Lumbar Scoliosis and Lumbar Lordosis
PELKER R, GAGE J. The Correlation of Idiopathic Lumbar Scoliosis and Lumbar Lordosis. Clinical Orthopaedics And Related Research® 1982, 163: 199-201. PMID: 7067253, DOI: 10.1097/00003086-198203000-00029.Peer-Reviewed Original Research