2017
Access of Patients With Lumbar Disc Herniations to Spine Surgeons
Anandasivam NS, Wiznia DH, Kim CY, Save AV, Grauer JN, Pelker RR. Access of Patients With Lumbar Disc Herniations to Spine Surgeons. Spine 2017, 42: 1179-1183. PMID: 27902558, DOI: 10.1097/brs.0000000000002005.Peer-Reviewed Original ResearchConceptsLumbar disc herniationMedicaid insuranceSpine surgeonsAppointment success rateDisc herniationInsurance typePatient accessPrivate insuranceMedicaid expansionProspective cohort studyDifferent insurance typesSuccess rateAccess of patientsCohort studyAffordable Care ActBACKGROUND DATAPatientsSpine careLumbar discAcceptance of insuranceReferralMedicaid eligibilitySurgeonsMedicaidCare Act
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 differencesArthroplastyThe Effect of Insurance Type on Patient Access to Carpal Tunnel Release Under the Affordable Care Act
Kim CY, Wiznia DH, Wang Y, Save AV, Anandasivam NS, Swigart CR, Pelker RR. The Effect of Insurance Type on Patient Access to Carpal Tunnel Release Under the Affordable Care Act. The Journal Of Hand Surgery 2016, 41: 503-509.e1. PMID: 26908020, DOI: 10.1016/j.jhsa.2016.01.007.Peer-Reviewed Original Research
2009
Actual Knee Motion during Continuous Passive Motion Protocols is Less Than Expected
Bible JE, Simpson AK, Biswas D, Pelker RR, Grauer JN. Actual Knee Motion during Continuous Passive Motion Protocols is Less Than Expected. Clinical Orthopaedics And Related Research® 2009, 467: 2656-2661. PMID: 19247728, PMCID: PMC2745449, DOI: 10.1007/s11999-009-0766-1.Peer-Reviewed Original Research
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 observerPatients
1991
The 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 bridgingArthroplastyCervical Spine Stabilization
PELKER R, DURANCEAU J, PANJABI M. Cervical Spine Stabilization. Spine 1991, 16: 117-122. PMID: 2011764, DOI: 10.1097/00007632-199102000-00003.Peer-Reviewed Original ResearchConceptsPosterior wiringCervical spine stabilizationCervical spine segmentsAxial rotation loadingBrace protectionBony injuriesSpine stabilizationReasonable stabilizationFacet fusionHuman cervical spine segmentsRotation loadingFlexion loadingBiomechanical propertiesSpine segmentsRepairSupplementationLateral bendingInjury
1989
Biomechanics of the rabbit cervical spine as a function of component transection
Wetzel F, Panjabi M, Pelker R. Biomechanics of the rabbit cervical spine as a function of component transection. Journal Of Orthopaedic Research® 1989, 7: 723-727. PMID: 2760744, DOI: 10.1002/jor.1100070513.Peer-Reviewed Original Research
1987
Biomechanical Aspects of Bone Autografts and Allografts
Pelker R, Friedlaender G. Biomechanical Aspects of Bone Autografts and Allografts. Orthopedic Clinics Of North America 1987, 18: 235-239. PMID: 3561975, DOI: 10.1016/s0030-5898(20)30387-4.Peer-Reviewed Original ResearchConceptsMechanical propertiesLarge torsional loadsLocal biomechanical environmentCompressive loadTorsional loadsFreeze-dried graftsFreeze-dried boneMechanical issuesBiomechanical responseLoadBiomechanical environmentBiomechanical aspectsBiomechanical perspectivePropertiesNormal biomechanicsFixation devicesBone graftDonor boneDevicesFrozen boneSkeletal reconstruction
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 ResearchIndium-111 platelet scintigraphy for the diagnosis of acute venous thrombosis.
Ezekowitz M, Pope C, Sostman H, Smith E, Glickman M, Rapoport S, Sniderman K, Friedlaender G, Pelker R, Taylor F. Indium-111 platelet scintigraphy for the diagnosis of acute venous thrombosis. Circulation 1986, 73: 668-674. PMID: 3948370, DOI: 10.1161/01.cir.73.4.668.Peer-Reviewed Original ResearchConceptsPlatelet scintigraphyContrast venographyGroup IIVenous thrombosisLower limb venous thrombosisGroup IIndium-111 platelet scintigraphyAcute venous thrombosisHigh-risk patientsMajor orthopedic proceduresPositive venogramsIntravenous heparinSymptomatic patientsConsecutive patientsActive thrombosisOrthopedic proceduresSingle injectionScintigraphyVenographyPatientsBlinded observersIndium-111Positive findingsFurther evaluationThrombosisThree‐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
Wave propagation across a bony discontinuity simulating a healing fracture
Pelker R, Saha S. Wave propagation across a bony discontinuity simulating a healing fracture. Journal Of Biomechanics 1985, 18: 745-753. PMID: 2933408, DOI: 10.1016/0021-9290(85)90049-1.Peer-Reviewed Original Research
1984
Proximal Femoral Epiphysiolysis in the Neonate
Ogden J, Lee K, Rudicel S, Pelker R. Proximal Femoral Epiphysiolysis in the Neonate. Journal Of Pediatric Orthopaedics 1984, 4: 285-292. PMID: 6736231, DOI: 10.1097/01241398-198405000-00002.Peer-Reviewed Original ResearchConceptsProximal femoral epiphysiolysisLong-term resultsCommon diagnostic findingsCongenital hip dysplasiaExperimental animal modelsProximal femoral epiphysisPremature growth arrestAbduction splintingPhyseal injuryPeriosteal sleeveAcetabular indexDiagnostic findingsGrowth complicationsProximal metaphysisCoxa varaFemoral injuryFemoral epiphysisAnimal modelsGreater trochanterHip dysplasiaProximal physisVarus deformationPhysisComplicationsNeonates
1983
FROZEN AND FREEZE-DRIED BONE GRAFTS
PELKER R, FRIEDLAENDER G, MARKHAM T. FROZEN AND FREEZE-DRIED BONE GRAFTS. Clinical Orthopaedics And Related Research® 1983, 174: 36-42. PMID: 6339142, DOI: 10.1097/00003086-198304000-00007.Peer-Reviewed Original ResearchBiomechanical 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 yearsInfectionStress wave propagation in bone
Pelker R, Saha S. Stress wave propagation in bone. Journal Of Biomechanics 1983, 16: 481-489. PMID: 6619165, DOI: 10.1016/0021-9290(83)90062-3.Peer-Reviewed Original ResearchConceptsStress wave propagation characteristicsStress wave propagationSingle compressive pulseWave propagation characteristicsSteel ballDynamic loadingStress wavesStrain gaugesWave characteristicsCompressive pulseWave propagationPropagation characteristicsHuman long bonesDynamic propertiesAttenuation coefficientPorosityLoadingCross-sectional area
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