2024
Biomechanical Effects of Subtalar Joint Fusion and Medial Ligament Reconstruction in Simulated Progressive Collapsing Foot Deformity
Lee W, Tecle N, Knapp E, Awad H, Oh I. Biomechanical Effects of Subtalar Joint Fusion and Medial Ligament Reconstruction in Simulated Progressive Collapsing Foot Deformity. Foot & Ankle International 2024, 45: 279-290. PMID: 38240174, DOI: 10.1177/10711007231220940.Peer-Reviewed Original ResearchMedial displacement calcaneal osteotomyProgressive collapsing foot deformitySubtalar joint fusionSevere flatfoot modelFlatfoot modelHeel alignmentValgus tiltMedial ligament reconstructionFoot deformityFresh-frozen cadaveric foot specimensJoint fusionLigament strainBiomechanical effectsTalo-first metatarsal angleCadaveric foot specimensLigament reconstructionSubtalar angleFoot alignmentFoot malalignmentForefoot abductionMetatarsal angleTibiotalar angleTibiotalar tiltFoot specimensCalcaneal osteotomy
2022
Peritalar Kinematics Restored with Combined Subtalar Fusion and Medial Ligament Reconstruction in a Simulated Advance Progressive Collapsing Flatfoot Deformity Model
Tecle N, Oh I, Gira E, Awad H. Peritalar Kinematics Restored with Combined Subtalar Fusion and Medial Ligament Reconstruction in a Simulated Advance Progressive Collapsing Flatfoot Deformity Model. Foot & Ankle Orthopaedics 2022, 7: 2473011421s00470. PMCID: PMC8793585, DOI: 10.1177/2473011421s00470.Peer-Reviewed Original ResearchMedializing calcaneal osteotomySubtalar fusionLigament reconstructionValgus angleSevere flatfoot modelHeel alignmentFlatfoot modelMeary's angleCoronal angleMedial ankle ligamentsMedial ligament reconstructionSequential surgical proceduresMultiple comparison testCadaveric foot specimensTibiotalar osteoarthritisTibiotalar angleMedial archValgus alignmentTibiotalar jointFlatfoot deformityHindfoot alignmentAnkle ligamentsSurgical proceduresCalcaneal osteotomyMedial stability
2020
Peritalar Kinematics With Combined Deltoid-Spring Ligament Reconstruction in Simulated Advanced Adult Acquired Flatfoot Deformity
MacDonald A, Ciufo D, Vess E, Knapp E, Awad HA, Ketz JP, Flemister AS, Oh I. Peritalar Kinematics With Combined Deltoid-Spring Ligament Reconstruction in Simulated Advanced Adult Acquired Flatfoot Deformity. Foot & Ankle International 2020, 41: 1149-1157. PMID: 32495639, DOI: 10.1177/1071100720929004.Peer-Reviewed Original ResearchConceptsSpring ligament tearsLigament reconstructionDeltoid ligament reconstructionLigament tearsTibiotalar jointFlatfoot deformityPeritalar stabilityFlatfoot modelTibiocalcaneonavicular ligamentAdult Acquired Flatfoot DeformityRecent anatomic studiesAcquired Flatfoot DeformityCadaveric flatfoot modelCadaveric foot specimensPeritalar jointsProgressive deformityValgus deformityMedial ligamentValgus alignmentSubtalar jointValgus angleDeltoid ligamentSevere modelMedial stabilityAnatomic studyRadiographic Outcomes after Flexible Flatfoot Reconstruction with and without Spring Ligament Reconstruction
Kohring J, MacDonald A, Karnyski S, Oh I, Baumhauer J, Ketz J, Flemister A. Radiographic Outcomes after Flexible Flatfoot Reconstruction with and without Spring Ligament Reconstruction. Foot & Ankle Orthopaedics 2020, 5: 2473011420s00008. PMCID: PMC8697192, DOI: 10.1177/2473011420s00008.Peer-Reviewed Original ResearchTalonavicular uncoverage angleSpring ligament repairSpring ligament reconstructionStage II AAFDRadiographic outcomesFlatfoot reconstructionLigament reconstructionCalcaneal pitchMeary's angleLigament repairSuture repairTibiotalar tiltRadiographic measurementsMetatarsal angleSuture deviceStage II adultTalar-first metatarsal anglePreoperative radiographic measurementsPostoperative radiographic outcomesRadiographic differencesFlatfoot deformityInclusion criteriaRepair groupSpring ligamentPatients
2019
Deltoid-Spring Ligament Reconstruction in Adult Acquired Flatfoot Deformity With Medial Peritalar Instability
Brodell JD, MacDonald A, Perkins JA, Deland JT, Oh I. Deltoid-Spring Ligament Reconstruction in Adult Acquired Flatfoot Deformity With Medial Peritalar Instability. Foot & Ankle International 2019, 40: 753-761. PMID: 30902021, DOI: 10.1177/1071100719839176.Peer-Reviewed Original ResearchConceptsPROMIS Pain InterferenceSpring ligament tearsPhysical functionPeritalar instabilityRadiographic outcomesLigament reconstructionLigament tearsOsseous correctionFlatfoot deformityPeritalar stabilitySF-36 physical functionTibiocalcaneonavicular ligamentTalo-first metatarsal angleAdult Acquired Flatfoot DeformityPostoperative weightbearing radiographsPostoperative clinical outcomesPROMIS Physical FunctionAnkle Ability MeasureRetrospective case seriesOutcomes Measurement Information SystemViable surgical optionCalcaneal pitch angleTalonavicular coverage angleAcquired Flatfoot DeformityMeasurement Information System
2018
Spring ligament tear decreases static stability of the ankle joint
Kelly M, Masqoodi N, Vasconcellos D, Fowler X, Osman WS, Elfar JC, Olles MW, Ketz JP, Flemister AS, Oh I. Spring ligament tear decreases static stability of the ankle joint. Clinical Biomechanics 2018, 61: 79-83. PMID: 30529505, DOI: 10.1016/j.clinbiomech.2018.11.011.Peer-Reviewed Original ResearchConceptsJoint reactive forcesSpring ligament injurySpring ligament tearsLigament injuryLigament tearsInjury modelTalonavicular jointInjury statesCadaveric lower legsLigament reconstructionHuman cadaveric lower legsNon-invasive methodFlatfoot deformityDeltoid ligamentSpring ligamentLower legJoint stabilityAnkle jointKnee jointBiomechanical studyLigamentLimbSignificant increaseInjuryAdvanced adultTibiocalcaneonavicular Ligament Reconstruction in Simulated Flatfoot Deformity with Medial Ligament Insufficiency
MacDonald A, Ciufo D, Knapp E, Awad H, Ketz J, Flemister A, Deland J, Oh I. Tibiocalcaneonavicular Ligament Reconstruction in Simulated Flatfoot Deformity with Medial Ligament Insufficiency. Foot & Ankle Orthopaedics 2018, 3: 2473011418s00327. DOI: 10.1177/2473011418s00327.Peer-Reviewed Original ResearchSpring ligament tearsLigament reconstructionLigament tearsHindfoot valgusFlatfoot deformityMedial stabilitySpring ligamentPeritalar jointsFlatfoot modelPercent correctionMedial ligamentSubtalar jointReconstruction typeAbduction angleAchilles tendon loadDeltoid ligament reconstructionPeroneus longus tendonSpring ligament reconstructionCadaveric flatfoot modelCadaveric foot specimensSignificant improvementTendon allograftTendon transferLigament insufficiencyLongus tendonDeltoid-Spring Ligament Reconstruction in Stage IIB Adult Acquired Flatfoot Deformity with Spring Ligament Tear
Oh I, MacDonald A, Ikepeze T, Deland J. Deltoid-Spring Ligament Reconstruction in Stage IIB Adult Acquired Flatfoot Deformity with Spring Ligament Tear. Foot & Ankle Orthopaedics 2018, 3: 2473011418s00372. DOI: 10.1177/2473011418s00372.Peer-Reviewed Original ResearchAdult Acquired Flatfoot DeformitySpring ligament tearsSF-36 physical functionLigament tearsPhysical functionAcquired Flatfoot DeformityOsseous correctionRadiographic outcomesFlatfoot deformityOutcomes Measurement Information System Physical FunctionShort-term clinical investigationsViable surgical treatment optionPeritalar stabilityPost-operative clinical outcomesTibiocalcaneonavicular ligamentTalo-first metatarsal anglePROMIS Physical FunctionSurgical treatment optionsCalcaneal pitch anglePain interference domainTalonavicular coverage angleAP talo-first metatarsal anglePrevious anatomic studiesGastrocnemius recessionLigament reconstructionSubtle Cavus Deformities
MacDonald A, Kelly M, Houck J, Baumhauer J, Oh I, Flemister A, Ketz J. Subtle Cavus Deformities. Foot & Ankle Orthopaedics 2018, 3: 2473011418s00081. DOI: 10.1177/2473011418s00081.Peer-Reviewed Original ResearchPROMIS Physical FunctionLateral ankle ligament reconstructionAnkle ligament reconstructionDepression T scoresPost-operative complicationsPain interferenceCavus deformityAllograft reconstructionLigament reconstructionT-scorePROMIS scoresRecurrent instabilityPROMIS PFPROMIS-PF T-scoreLateral ankle ligament injuriesLateral ankle reconstructionSubtle cavus footAnkle ligament injuriesClear risk factorsPost-operative depressionStudent's t-testImproved painRecurrent injuryAnkle reconstructionLigament injury
2017
Trends in PROMIS Scores in the Early Post-operative Period following Various Lateral Ankle Ligament Reconstructive Techniques
MacDonald A, Houck J, Ketz J, Baumhauer J, Oh I, Flemister A. Trends in PROMIS Scores in the Early Post-operative Period following Various Lateral Ankle Ligament Reconstructive Techniques. Foot & Ankle Orthopaedics 2017, 2: 2473011417s000276. DOI: 10.1177/2473011417s000276.Peer-Reviewed Original ResearchLateral ankle ligament reconstructionAnkle ligament reconstructionPain interferenceLigament reconstructionPROMIS scoresBaseline beginningDepression scoresReconstruction typeLateral ankle ligament injuriesEarly post-operative periodMeeting exclusion criteriaPROMIS Physical FunctionPre-operative scoresPost-operative visitAnkle ligament injuriesPost-operative periodPre-operative counselingSlow improvementType of reconstructionICD-9/10Conservative managementOperative treatmentLigament injurySurgical outcomesAnkle clinic
2016
Spring Ligament Tear Decreases the Ankle and Talonavicular Joint Reaction Forces
Oh I, Kelly M, Maqsoodi N, Vasconcellos D, Osman W, Fowler X, Elfar J, Olles M. Spring Ligament Tear Decreases the Ankle and Talonavicular Joint Reaction Forces. Foot & Ankle Orthopaedics 2016, 1: 2473011416s00072. DOI: 10.1177/2473011416s00072.Peer-Reviewed Original ResearchSpring ligament tearsLigament reconstructionLigament tearsTalonavicular jointInjury modelJoint reaction forcesTibiocalcaneonavicular ligamentBiomechanical studyMedial ankle instabilityAdjacent soft tissuesSpring ligament reconstructionPrevious anatomic studiesCadaveric lower legsFirst biomechanical studyClinical efficacyHuman cadaveric lower legsValgus deformitySemitendinosus allograftDistal tibiaFlatfoot deformityDeltoid ligamentAnkle instabilityNavicular tuberosityAnatomic studyLower legReconstruction of the Deltoid-Spring Ligament
Grunfeld R, Oh I, Flemister S, Ketz J. Reconstruction of the Deltoid-Spring Ligament. Techniques In Foot & Ankle Surgery 2016, 15: 39-46. DOI: 10.1097/btf.0000000000000108.Peer-Reviewed Original ResearchSurgical techniqueAnatomic reconstructionAdult-acquired flatfoot deformityPeroneus longus allograftSpring ligament insufficiencyFirst surgical techniqueSpring ligament reconstructionSpring ligament complexLigament reconstructionLigament insufficiencyDeformity patientsLigamentous stabilityFlatfoot deformityDeltoid ligamentSpring ligamentLigament complexTibiocalcaneonavicular ligamentDeltoidLigamentAdequate correctionExpert opinionLevel 5AllograftsPatients