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
2019
Partial 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
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
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 ResearchMeSH KeywordsHumansKnee InjuriesKnee JointMagnetic Resonance ImagingPosterior Cruciate LigamentSoft Tissue InjuriesConceptsPosterior 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 deficiency
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
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