2021
Patient-Reported Activity Levels Correlate With Early Cartilage Degeneration After Anterior Cruciate Ligament Reconstruction
Friedman JM, Su F, Zhang AL, Allen CR, Feeley BT, Souza R, Li X, Ma CB, Lansdown DA. Patient-Reported Activity Levels Correlate With Early Cartilage Degeneration After Anterior Cruciate Ligament Reconstruction. The American Journal Of Sports Medicine 2021, 49: 442-449. PMID: 33395319, DOI: 10.1177/0363546520980431.Peer-Reviewed Original ResearchConceptsAnterior cruciate ligament reconstructionMarx activity levelMarx activity scoreCruciate ligament reconstructionMarx scoresCartilage degenerationMagnetic resonance imagingMedial compartmentEarly cartilage degenerationLigament reconstructionPosttraumatic osteoarthritisActivity scoreActivity levelsOrgan Magnetic Resonance Imaging ScoreOsteoarthritis Outcome Score (KOOS) scoresMagnetic Resonance Imaging ScorePre-existing arthritisPatient-reported outcomesLevel of evidenceSoft tissue graftsFisher's exact testMedial compartment degenerationPositive predictive valueSpearman rank testCartilage degenerative changes
2020
Quantitative imaging of anterior cruciate ligament (ACL) graft demonstrates longitudinal compositional changes and relationships with clinical outcomes at 2 years after ACL reconstruction
Lansdown DA, Xiao W, Zhang AL, Allen CR, Feeley BT, Li X, Majumdar S, Ma CB. Quantitative imaging of anterior cruciate ligament (ACL) graft demonstrates longitudinal compositional changes and relationships with clinical outcomes at 2 years after ACL reconstruction. Journal Of Orthopaedic Research® 2020, 38: 1289-1295. PMID: 31868948, PMCID: PMC7433779, DOI: 10.1002/jor.24572.Peer-Reviewed Original Research
2019
Preoperative IDEAL (Iterative Decomposition of Echoes of Asymmetrical Length) magnetic resonance imaging rotator cuff muscle fat fractions are associated with rotator cuff repair outcomes
Lansdown DA, Morrison C, Zaid MB, Patel R, Zhang AL, Allen CR, Feeley BT, Ma CB. Preoperative IDEAL (Iterative Decomposition of Echoes of Asymmetrical Length) magnetic resonance imaging rotator cuff muscle fat fractions are associated with rotator cuff repair outcomes. Journal Of Shoulder And Elbow Surgery 2019, 28: 1936-1941. PMID: 31371160, DOI: 10.1016/j.jse.2019.05.018.Peer-Reviewed Original ResearchConceptsRotator cuff repairPostoperative PROMIS scoresPROMIS scoresFatty infiltrationCuff repairFat fractionRotator cuff muscle fatty infiltrationRotator cuff repair outcomesOnly significant independent predictorArthroscopic rotator cuff repairPreoperative fatty infiltrationInferior clinical outcomesSignificant independent predictorsIntramuscular fat fractionMuscle fatty infiltrationMuscle fat fractionMagnetic resonance imagingQuantitative magnetic resonance imagingMagnetic resonance imaging sequencePostoperative outcomesIndependent predictorsClinical outcomesTear sizePatientsResonance imagingIntra-articular Osteoid Osteoma of the Distal Femur Treated with Osteochondral Grafting: A Report of 2 Cases.
Monroe EJ, Chambers CC, Davoodian A, Cho SJ, Motamedi D, Allen CR. Intra-articular Osteoid Osteoma of the Distal Femur Treated with Osteochondral Grafting: A Report of 2 Cases. JBJS Case Connector 2019, 9: e0211. PMID: 31211746, DOI: 10.2106/jbjs.cc.18.00211.Peer-Reviewed Original ResearchPartial Transphyseal Anterior Cruciate Ligament Reconstruction: Clinical, Functional, and Radiographic Outcomes
Chambers CC, Monroe EJ, Allen CR, Pandya NK. Partial Transphyseal Anterior Cruciate Ligament Reconstruction: Clinical, Functional, and Radiographic Outcomes. The American Journal Of Sports Medicine 2019, 47: 1353-1360. PMID: 30995077, DOI: 10.1177/0363546519836423.Peer-Reviewed Original ResearchConceptsMechanical lateral distal femoral angleMedial proximal tibial angleTransphyseal ACL reconstructionMechanical axis deviationACL reconstructionGraft failureGrowth disturbanceReoperation rateACL injuryRadiographic outcomesFunctional outcomePediatric International Knee Documentation Committee scoreInternational Knee Documentation Committee scoreSubsequent revision ACL reconstructionAnterior cruciate ligament injuryLateral distal femoral angleOptimal reconstruction techniquePostoperative growth disturbanceGraft failure rateCruciate ligament injuryGood functional outcomeProximal tibial angleSubset of patientsRevision ACL reconstructionDistal femoral angle
2018
Knee Imaging Following Anterior Cruciate Ligament Reconstruction: The Surgeon's and Radiologist's Perspectives
Srinivasan R, Wan J, Allen CR, Steinbach LS. Knee Imaging Following Anterior Cruciate Ligament Reconstruction: The Surgeon's and Radiologist's Perspectives. Seminars In Musculoskeletal Radiology 2018, 22: 386-397. PMID: 30134463, DOI: 10.1055/s-0038-1653953.Peer-Reviewed Original ResearchConceptsACL reconstructionAnterior cruciate ligament tearsNormal imaging appearanceACL reconstruction surgeryCruciate ligament tearsExcellent postoperative resultsMagnetic resonance imagingMost patientsLigament tearsLigamentous injuriesCommon injuriesPostoperative resultsImaging appearancesReconstruction surgerySurgical techniqueCommon causeRecurrent instabilityReconstruction failureCartilage damageChronic instabilityEarly osteoarthritisMeniscal tearsResonance imagingPatientsRadiologist's perspective
2016
Accuracy of MRI evaluation of meniscus tears in the setting of ACL injuries
Dufka FL, Lansdown DA, Zhang AL, Allen CR, Ma CB, Feeley BT. Accuracy of MRI evaluation of meniscus tears in the setting of ACL injuries. The Knee 2016, 23: 460-464. PMID: 26917035, DOI: 10.1016/j.knee.2016.01.018.Peer-Reviewed Original ResearchConceptsMagnetic resonance imagingLateral meniscus tearsMedial meniscus tearPre-operative magnetic resonance imagingNegative predictive valuePositive predictive valueACL reconstructionMeniscus tearsACL injuryPredictive valueAnterior cruciate ligament reconstructionNPV of MRIConcomitant meniscus injuryDiagnostic performancePrimary ACL reconstructionCruciate ligament reconstructionPre-operative detectionHigh diagnostic performanceOperative interventionACL tearsLigament reconstructionOperative treatmentInitial injuryMRI evaluationMeniscus injury
2014
A comprehensive in vivo kinematic, quantitative MRI and functional evaluation following ACL reconstruction — A comparison between mini-two incision and anteromedial portal femoral tunnel drilling
Lansdown DA, Allen C, Zaid M, Wu S, Subburaj K, Souza R, Feeley BT, Li X, Ma CB. A comprehensive in vivo kinematic, quantitative MRI and functional evaluation following ACL reconstruction — A comparison between mini-two incision and anteromedial portal femoral tunnel drilling. The Knee 2014, 22: 547-553. PMID: 25982298, PMCID: PMC4472567, DOI: 10.1016/j.knee.2014.12.005.Peer-Reviewed Original ResearchConceptsAnteromedial portal techniqueACL reconstructionFemoral tunnel drillingMT groupContralateral kneeNormal kneesEarly cartilage degenerationKnee kinematicsCartilage degenerationMarx Activity Rating ScaleTunnel drillingAM groupCentral medial tibiaKOOS symptom scoresPatient's contralateral kneeSignificant early differencesAnatomic ACL reconstructionActivity Rating ScaleNormal knee kinematicsKOOS surveysSymptom scoresFemoral tunnelControl subjectsTibial positionPortal techniqueCartilage MRI relaxation times after arthroscopic partial medial meniscectomy reveal localized degeneration
Souza RB, Wu SJ, Morse LJ, Subburaj K, Allen CR, Feeley BT. Cartilage MRI relaxation times after arthroscopic partial medial meniscectomy reveal localized degeneration. Knee Surgery, Sports Traumatology, Arthroscopy 2014, 23: 188-197. PMID: 24792070, DOI: 10.1007/s00167-014-2997-2.Peer-Reviewed Original ResearchConceptsArthroscopic partial meniscectomyPartial meniscectomyWeight-bearing regionsTibiofemoral kinematicsArthroscopic partial medial meniscectomyPost-surgical MRIPartial medial meniscectomyLateral tibial plateauCartilage relaxation timesMedial femoral condyleAbnormal tibiofemoral kinematicsMRI relaxation timesT2 relaxation time mappingSignificant elevationMedial meniscectomyPosterior hornTibial plateauEarly changesTimes elevationMeniscectomyFemoral condyleKneeMonthsResectionT-test
2013
Differences in Mechanisms of Failure, Intraoperative Findings, and Surgical Characteristics Between Single- and Multiple-Revision ACL Reconstructions
Chen JL, Allen CR, Stephens TE, Haas AK, Huston LJ, Wright RW, Feeley BT, Albright J, Amendola A, Anderson A, Andrish J, Annunziata C, Arciero R, Bach B, Baker C, Bartolozzi A, Baumgarten K, Bechler J, Berg J, Bernas G, Brockmeier S, Brophy R, Bush-Joseph C, Butler J, Campbell J, Carey J, Carpenter J, Cole B, Cooper D, Cooper J, Cox C, Creighton R, Dahm D, David T, DeBerardino T, Dunn W, Flanigan D, Frederick R, Ganley T, Gatt C, Gecha S, Giffin J, Hame S, Hannafin J, Harner C, Harris N, Hechtman K, Hershman E, Hoellrich R, Hosea T, Johnson D, Johnson T, Jones M, Kaeding C, Kamath G, Klootwyk T, Lantz B, Levy B, Ma C, Maiers G, Mann B, Marx R, Matava M, Mathien G, McAllister D, McCarty E, McCormack R, Miller B, Nissen C, O’Neill D, Owens M, Parker R, Purnell M, Ramappa A, Rauh M, Rettig A, Sekiya J, Shea K, Sherman O, Slauterbeck J, Smith M, Spang J, Spindler K, Stuart M, Svoboda L, Taft T, Tenuta C, Tingstad E, Vidal A, Viskontas D, White R, Williams J, Wolcott M, Wolf B, York J. Differences in Mechanisms of Failure, Intraoperative Findings, and Surgical Characteristics Between Single- and Multiple-Revision ACL Reconstructions. The American Journal Of Sports Medicine 2013, 41: 1571-1578. PMID: 23698386, PMCID: PMC3839418, DOI: 10.1177/0363546513487980.Peer-Reviewed Original ResearchConceptsMarx activity levelACL reconstructionChondral injuriesRecurrent injuryPatellofemoral compartmentCommon causeActivity levelsAnterior cruciate ligament reconstructionACL graft injuryCruciate ligament reconstructionPrimary outcome variableCase-control studyGradual-onset injuriesLevel of evidenceFirst-time revisionsGraft injuryAssociated injuriesSurgical characteristicsIntraoperative findingsLigament reconstructionPrimary revisionGraft selectionGraft typeMeniscal injurySudden onset
2011
Patients' attitudes and factors in their selection of grafts for anterior cruciate ligament reconstruction
Cheung SC, Allen CR, Gallo RA, Benjamin C, Feeley BT. Patients' attitudes and factors in their selection of grafts for anterior cruciate ligament reconstruction. The Knee 2011, 19: 49-54. PMID: 21211979, DOI: 10.1016/j.knee.2010.11.009.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnterior Cruciate LigamentAnterior Cruciate Ligament InjuriesAttitude of Health PersonnelChoice BehaviorFemaleHumansKnee InjuriesMalePatient Acceptance of Health CarePhysician's RolePlastic Surgery ProceduresProstheses and ImplantsRetrospective StudiesTransplantation, AutologousTransplantation, HomologousConceptsGraft choiceSurgeon recommendationACL reconstructionAnterior cruciate ligament reconstructionCruciate ligament reconstructionHalf of patientsSelection of graftsDonor site morbidityMean followOlder patientsLigament reconstructionMedical websitesPatients' attitudesPatientsSite morbidityDifferent graftsGraftAllograftsDemographic factorsLikert scaleUrban settingsHigh levelsMorbidityFactorsRecommendations
2010
Descriptive Epidemiology of the Multicenter ACL Revision Study (MARS) Cohort
Wright R, Huston L, Spindler K, Dunn W, Haas A, Allen C, Cooper D, DeBerardino T, Lantz B, Mann B, Stuart M. Descriptive Epidemiology of the Multicenter ACL Revision Study (MARS) Cohort. The American Journal Of Sports Medicine 2010, 38: 1979-1986. PMID: 20889962, PMCID: PMC3655411, DOI: 10.1177/0363546510378645.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAnterior Cruciate LigamentAnterior Cruciate Ligament InjuriesCanadaChildCohort StudiesCross-Sectional StudiesFemaleHumansKnee InjuriesMaleMiddle AgedMultivariate AnalysisOrthopedic ProceduresOutcome Assessment, Health CareProspective StudiesReoperationSports MedicineSurveys and QuestionnairesTreatment FailureUnited StatesYoung AdultConceptsRevision ACL reconstructionPatient demographicsACL reconstructionGraft choiceWorse outcomesRevision anterior cruciate ligament reconstructionMulticenter prospective longitudinal studyAnterior cruciate ligament reconstructionPatient-based outcome measuresConcomitant knee injuriesCruciate ligament reconstructionInstitutional review board approvalIntra-articular injuriesTime of injuryCross-sectional studyLevel of evidenceProspective longitudinal studyReview board approvalACL reconstruction methodsReconstruction cohortTraumatic reinjuriesPrevious graftProspective cohortClinical featuresClinical outcomes
2009
Anterior Cruciate Ligament Graft Reconstruction
Giaconi JC, Allen CR, Steinbach LS. Anterior Cruciate Ligament Graft Reconstruction. Topics In Magnetic Resonance Imaging 2009, 20: 129-150. PMID: 20410802, DOI: 10.1097/rmr.0b013e3181d657a7.Peer-Reviewed Original ResearchConceptsAnterior cruciate ligamentACL reconstructionGraft reconstructionAnterior cruciate ligament reconstructionACL graft reconstructionPhyseal-sparing techniquesCruciate ligament reconstructionDaily clinical practiceMagnetic resonance imagingGraft laxityGraft tearLigament reconstructionACL graftCruciate ligamentClinical practiceSelective bundleResonance imagingDouble bundleConsulting radiologistLigamentSingle bundleCommon occurrenceArthrofibrosisComplicationsHardware failure
2005
Neuromuscular and Biomechanical Adaptations of Patients with Isolated Deficiency of the Posterior Cruciate Ligament
Fontboté CA, Sell TC, Laudner KG, Haemmerle M, Allen CR, Margheritini F, Lephart SM, Harner CD. Neuromuscular and Biomechanical Adaptations of Patients with Isolated Deficiency of the Posterior Cruciate Ligament. The American Journal Of Sports Medicine 2005, 33: 982-989. PMID: 15888720, DOI: 10.1177/0363546504271966.Peer-Reviewed Original ResearchConceptsDrop landing taskControl groupPosterior cruciate ligament injuriesPosterior cruciate ligament deficiencyCruciate ligament injuryCruciate ligament deficiencyPosterior cruciate ligamentVertical ground reaction force loading rateBiomechanical adaptationsGround reaction force loading rateKnee valgus momentGreater vertical ground reaction forceInstrumented laxityInvolved kneeVertical ground reaction forceGreater posterior displacementLigament deficiencyLigament injuryInvolved limbSurgical interventionUninvolved limbControl subjectsClinical laxityCruciate ligamentLaxity examination
2003
Revision anterior cruciate ligament reconstruction
Allen CR, Giffin JR, Harner CD. Revision anterior cruciate ligament reconstruction. Orthopedic Clinics Of North America 2003, 34: 79-98. PMID: 12735203, DOI: 10.1016/s0030-5898(02)00066-4.Peer-Reviewed Original ResearchConceptsRevision ACL surgeryACL surgeryACL reconstructionPatient expectationsRevision anterior cruciate ligament reconstructionSuccessful revision ACL surgeryAnterior cruciate ligament reconstructionGraft material selectionInitial ACL reconstructionCruciate ligament reconstructionPostoperative rehabilitation protocolThorough preoperative evaluationRevision ACL reconstructionAppropriate patient expectationsSymptoms of instabilityConcomitant surgeryAnterior laxityGraft removalPreoperative evaluationLigament reconstructionPatient functionSurgical outcomesHardware removalPhysical examinationRadiographic evaluation
2002
Posterior cruciate ligament injuries
Allen CR, Kaplan LD, Fluhme DJ, Harner CD. Posterior cruciate ligament injuries. Current Opinion In Rheumatology 2002, 14: 142-149. PMID: 11845019, DOI: 10.1097/00002281-200203000-00011.Peer-Reviewed Original ResearchConceptsPosterior cruciate ligamentPCL injuriesGrade III PCL injuriesMultiple ligament knee injuriesPosterior cruciate ligament injuriesAdequate physical therapyChronic PCL insufficiencyCruciate ligament injuryPCL-deficient kneeAvulsion fractureSurgical treatmentKnee injuriesLigament injuryPCL reconstructionDegenerative arthritisExcellent outcomesPCL insufficiencyClinical examinationDirect blowKnee stabilizersCruciate ligamentAnterior aspectPhysical therapyPosterior drawerPCL deficiencyTransient quadriparesis in the athlete
Allen CR, Kang JD. Transient quadriparesis in the athlete. Clinics In Sports Medicine 2002, 21: 15-27. PMID: 11877869, DOI: 10.1016/s0278-5919(03)00054-1.Peer-Reviewed Original ResearchConceptsTransient quadriparesisNeurologic injuryCongenital stenosisPermanent neurologic injuryCervical cord injuryPermanent cervical cord injuriesRadiographic findingsCord injuryAthlete's riskRisk factorsPlay criteriaSpinal injuryRelative riskPrevious historyQuadriparesisContact sportsControversy persistsSevere injuriesInjuryStenosisIndividual basisAthletesRiskEpisodesTerms of causes
2001
Potential complication of bioabsorbable screw fixation for osteochondritis dissecans of the knee
Scioscia T, Giffin J, Allen C, Harner C. Potential complication of bioabsorbable screw fixation for osteochondritis dissecans of the knee. Arthroscopy The Journal Of Arthroscopic And Related Surgery 2001, 17: 1-5. PMID: 11172259, DOI: 10.1053/jars.2001.17995.Peer-Reviewed Original ResearchConceptsBioabsorbable screw fixationOsteochondritis dissecansScrew fixationCartilage damageIntra-articular loose bodiesMedial femoral condyleAcute episodePotential complicationsArthroscopic examinationBioabsorbable screwsLoose bodiesTibial plateauFemoral condyleCase 1DissecansKneeScrew headScrewsFixationPainComplicationsPatientsSurgeryEffusionDamage
2000
Importance of the medial meniscus in the anterior cruciate ligament‐deficient knee
Allen C, Wong E, Livesay G, Sakane M, Fu F, Woo S. Importance of the medial meniscus in the anterior cruciate ligament‐deficient knee. Journal Of Orthopaedic Research® 2000, 18: 109-115. PMID: 10716286, DOI: 10.1002/jor.1100180116.Peer-Reviewed Original ResearchConceptsAnterior cruciate ligament-deficient kneeLigament-deficient kneeAnterior tibial loadDegrees of flexionAnterior cruciate ligamentFull knee extensionTibial loadMedial meniscusMedial meniscectomyIntact kneeCruciate ligamentMeniscal tearsKnee extensionAnterior cruciate ligament deficient patientsUniversal force-moment sensor testing systemAnterior tibial translationMedial meniscal tearsInternal tibial rotationKnee stabilityTibial translationHuman medial meniscusMeniscal integrityKnee flexionKnee motionTibial rotation
1999
Injury and reconstruction of the anterior cruciate ligament and knee osteoarthritis
Allen C, Livesay G, Wong E, Woo S. Injury and reconstruction of the anterior cruciate ligament and knee osteoarthritis. Osteoarthritis And Cartilage 1999, 7: 110-121. PMID: 10367019, DOI: 10.1053/joca.1998.0166.Peer-Reviewed Original ResearchConceptsAnterior cruciate ligamentSitu forcesBasic mechanical propertiesRobotic/UFS testing systemKnee kinematicsACL reconstructionTesting systemKnee osteoarthritisACL graftCruciate ligamentUniversal force-moment sensor testing systemNon-contact mannerCadaveric kneesMechanical propertiesLoading conditionsViscoelastic characteristicsAnterior tibial loadMuscle loading conditionsFreedom knee kinematicsHuman cadaveric kneesQuadruple semitendinosusGraft functionPL bundleAM bundleGraft forces