Ritter, J Bone Joint Surg Am 2011 - The Effect of Alignment and BMI on Failure of Total Knee Replacement

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The Effect of Alignment and BMI on Failure of Total Knee Replacement

Ritter, Malinzak, et al.·J Bone Joint Surg Am·2011·658 citations·Retrospective cohort

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Background

The purpose of this study was to determine the effect of tibiofemoral alignment, femoral and tibial component alignment, and body-mass index (BMI) on implant survival following total knee replacement.

Methods

We retrospectively reviewed 6070 knees in 3992 patients with a minimum of two years of follow-up.
Each knee was classified on the basis of postoperative alignment (overall tibiofemoral alignment and alignment of the tibial and the femoral component in the coronal plane).
Failures (defined as revision for any reason other than infection) were analyzed with use of Cox regression; patient covariates included overall alignment, component alignments, and preoperative BMI.

Results

Failure was most likely to occur if the orientation of the tibial component was <90° relative to the tibial axis and the orientation of the femoral component was ≥8° of valgus (failure rate, 8.7%; p < 0.0001).
In contrast, failure was least likely to occur if both the tibial and the femoral component were in a neutral orientation (≥90° and <8° of valgus, respectively) (failure rate, 0.2% [nine of 4633]; p < 0.0001).
"Correction" of varus or valgus malalignment of the first implanted component by placement of the second component to attain neutral tibiofemoral alignment was associated with a failure rate of 3.2% (p = 0.4922) for varus tibial malalignment and 7.8% (p = 0.0082) for valgus femoral malalignment.
A higher BMI was associated with an increased failure rate.
Compared with patients with a BMI of 23 to 26 kg/m2, the failure rate in patients with a BMI of ≥41 kg/m2 increased from 0.7% to 2.6% (p = 0.0046) in well-aligned knees, from 1.6% to 2.9% (p = 0.0180) in varus knees, and from 1.0% to 7.1% (p = 0.0260) in valgus knees.

Conclusions

Attaining neutrality in all three alignments is important in maximizing total knee implant survival. Substantial "correction" of the alignment of one component in order to compensate for malalignment of the other component and thus produce a neutrally aligned total knee replacement can increase the risk of failure (p = 0.0082). The use of conventional guides to align a total knee replacement provides acceptable alignment; however, the surgeon should be aware that the patient's size, as determined by the BMI, is also a major factor in total knee replacement failure.

Copyright remains with the authors and publisher.

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Ritter, Malinzak, et al.J Bone Joint Surg Am2011658 citationsRetrospective cohort

Acetabular Defect Classification and Surgical Reconstruction in Revision Arthroplasty. A 6-Year Follow-Up Evaluation.

Paprosky, Lawrence, et al.J Arthroplasty19941,213 citationsRetrospective cohort

Effects of Bracing in Adolescents with Idiopathic Scoliosis.

Weinstein, Dobbs, et al.N Engl J Med20131,160 citationsRCT

Adolescent Idiopathic Scoliosis: A New Classification to Determine Extent of Spinal Arthrodesis.

Lenke, Blanke, et al.J Bone Joint Surg Am20011,720 citationsDiagnostic study

Problems in the Management of Type III (Severe) Open Fractures: A New Classification of Type III Open Fractures.

Gustilo, Williams, et al.J Trauma19842,361 citationsRetrospective cohort

Neer Award 2005: The Grammont Reverse Shoulder Prosthesis: Results in Cuff Tear Arthritis, Fracture Sequelae, and Revision Arthroplasty.

Boileau, Hovorka, et al.J Shoulder Elbow Surg20061,115 citationsProspective cohort

A System for the Surgical Staging of Musculoskeletal Sarcoma.

Enneking, Goodman, et al.Clin Orthop Relat Res19802,112 citationsRetrospective cohort

Fracture Fixation in the Operative Management of Hip Fractures (FAITH): An International, Multicentre, Randomised Controlled Trial.

Fixation using Alternative Implants for the Treatment of Hip fractures (FAITH) InvestigatorsLancet2017310 citationsRCT

Fatty Muscle Degeneration in Cuff Ruptures. Pre- and Postoperative Evaluation by CT Scan.

Goutallier, Voisin, et al.Clin Orthop Relat Res19942,669 citationsProspective cohort

Dislocations after Total Hip-Replacement Arthroplasties.

Lewinnek, Zimmerman, et al.J Bone Joint Surg Am19782,549 citationsRetrospective cohort

Morphologic Study of the Glenoid in Primary Glenohumeral Osteoarthritis.

Walch, Khoury, et al.J Arthroplasty19991,142 citationsRetrospective cohort

The Three Column Spine and Its Significance in the Classification of Acute Thoracolumbar Spinal Injuries.

DenisSpine (Phila Pa 1976)19832,566 citationsRetrospective cohort

The Reverse Shoulder Prosthesis for Glenohumeral Arthritis Associated with Severe Rotator Cuff Deficiency. A Minimum Two-Year Follow-Up Study of Sixty Patients.

Frankle, Vasey, et al.J Bone Joint Surg Am2005773 citationsRetrospective cohort

Randomized Trial of Reamed and Unreamed Intramedullary Nailing of Tibial Shaft Fractures.

Study to Prospectively Evaluate Reamed Intramedullary Nails in Patients with Tibial Fractures Investigators, Walter, et al.J Bone Joint Surg Am2008445 citationsRCT

A New Classification of Thoracolumbar Injuries: The Importance of Injury Morphology, the Integrity of the Posterior Ligamentous Complex, and Neurologic Status.

Vaccaro, Oner, et al.Spine (Phila Pa 1976)2005866 citationsConsensus statement

A Trial of Wound Irrigation in the Initial Management of Open Fracture Wounds.

FLOW Investigators, Guyatt, et al.N Engl J Med2015347 citationsRCT

Curve Progression in Idiopathic Scoliosis.

Weinstein, PonsetiJ Bone Joint Surg Am1983641 citationsRetrospective cohort

Traumatic Glenohumeral Bone Defects and Their Relationship to Failure of Arthroscopic Bankart Repairs: Significance of the Inverted-Pear Glenoid and the Humeral Engaging Hill-Sachs Lesion.

Burkhart, De BeerArthroscopy20001,884 citationsCase series

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Baumgaertner, Keggi, et al.J Bone Joint Surg Am19951,441 citationsRetrospective cohort

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Berndt, HartyJ Bone Joint Surg Am1959945 citationsBiomechanical study

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Weinstein, SPORT Investigators, et al.N Engl J Med20081,207 citationsRCT

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Herring, Browne, et al.J Pediatr Orthop1992461 citationsRetrospective cohort

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Yamaguchi, Middleton, et al.J Shoulder Elbow Surg2001498 citationsRetrospective cohort

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Burkhart, Jolson, et al.Arthroscopy1993469 citationsAnatomic study

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O'Driscoll, Morrey, et al.J Bone Joint Surg Am1991997 citationsCase series

Preoperative versus Postoperative Radiotherapy in Soft-Tissue Sarcoma of the Limbs: A Randomised Trial.

O'Sullivan, Zee, et al.Lancet20021,587 citationsRCT

Nonoperative Treatment Compared with Plate Fixation of Displaced Midshaft Clavicular Fractures. A Multicenter, Randomized Clinical Trial.

Canadian Orthopaedic Trauma SocietyJ Bone Joint Surg Am2007804 citationsRCT

Microvasculature of the Human Meniscus.

Arnoczky, WarrenAm J Sports Med19821,227 citationsAnatomic study

Metastatic Disease in Long Bones. A Proposed Scoring System for Diagnosing Impending Pathologic Fractures.

MirelsClin Orthop Relat Res19891,222 citationsRetrospective cohort

Early versus Delayed Decompression for Traumatic Cervical Spinal Cord Injury: Results of the Surgical Timing in Acute Spinal Cord Injury Study (STASCIS).

Fehlings, Rampersaud, et al.PLoS One20121,200 citationsProspective cohort

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NeerClin Orthop Relat Res19831,827 citationsReview article

Direct Decompressive Surgical Resection in the Treatment of Spinal Cord Compression Caused by Metastatic Cancer: A Randomised Trial.

Patchell, Young, et al.Lancet20052,356 citationsRCT

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Salter, HarrisJ Bone Joint Surg Am19631,737 citationsRetrospective cohort

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Burkhart, Kibler, et al.Arthroscopy2003929 citations

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Neer, Fukuda, et al.J Bone Joint Surg Am1983774 citationsCase series

A System of Staging Musculoskeletal Neoplasms.

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Hewett, Succop, et al.Am J Sports Med20053,495 citationsProspective cohort

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Jobe, Lombardo, et al.J Bone Joint Surg Am1986758 citationsCase series

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NeerJ Bone Joint Surg Am1974598 citationsCase series

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HawkinsJ Bone Joint Surg Am1970556 citationsRetrospective cohort

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Stiell, Worthington, et al.JAMA20011,283 citationsProspective cohort

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Gerber, Vinh, et al.J Bone Joint Surg Am1990441 citationsAnatomic study

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Snyder, Friedman, et al.Arthroscopy19901,264 citationsCase series

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NeerJ Bone Joint Surg Am19701,283 citationsRetrospective cohort

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Rosenberg, Wesley, et al.Ann Surg19821,347 citationsRCT

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NeerJ Bone Joint Surg Am1972536 citationsCase series

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Boden, Wiesel, et al.J Bone Joint Surg Am1990668 citationsProspective cohort

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Griffin, FASHIoN Study Group, et al.Lancet2018542 citationsRCT

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Dejour, Guier, et al.Knee Surg Sports Traumatol Arthrosc19941,987 citationsCase-control study

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Morrey, Chao, et al.J Bone Joint Surg Am19811,380 citationsBiomechanical study

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Judet, Letournel, et al.J Bone Joint Surg Am1964980 citationsCase series

Inferior Capsular Shift for Involuntary Inferior and Multidirectional Instability of the Shoulder. A Preliminary Report.

Neer, FosterJ Bone Joint Surg Am1980934 citationsCase series

The Impact of Positive Sagittal Balance in Adult Spinal Deformity.

Glassman, Schwab, et al.Spine (Phila Pa 1976)20051,878 citationsRetrospective cohort

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Bosse, Castillo, et al.N Engl J Med2002901 citationsProspective cohort

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Poppen, WalkerJ Bone Joint Surg Am1976886 citationsCase-control study

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Harms, MelcherSpine (Phila Pa 1976)20011,528 citationsCase series

A Randomized Trial of Vertebroplasty for Osteoporotic Spinal Fractures.

Kallmes, Jarvik, et al.N Engl J Med20091,422 citationsRCT

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Buchbinder, Murphy, et al.N Engl J Med20091,416 citationsRCT

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Hoffman, Zucker, et al.N Engl J Med20001,302 citationsProspective cohort

Total Hip Arthroplasty or Hemiarthroplasty for Hip Fracture

HEALTH Investigators, Devereaux, et al.N Engl J Med2019507 citationsRCT

A Classification for Congenital Limb Malformations.

SwansonJ Hand Surg Am1976429 citationsReview article

Treatment of Grade IV Fracture-Dislocation of the Hip.

PipkinJ Bone Joint Surg Am1957445 citationsCase series

Compression-Plate Fixation in Acute Diaphyseal Fractures of the Radius and Ulna

Anderson, Park, et al.J Bone Joint Surg Am1975416 citationsCase series

Legg-Calve-Perthes Disease. Part II: Prospective Multicenter Study of the Effect of Treatment on Outcome.

Herring, Browne, et al.J Bone Joint Surg Am2004143 citationsProspective cohort

The Role of the Scapula in Athletic Shoulder Function.

KiblerAm J Sports Med19981,240 citationsReview article

The SLAC Wrist: Scapholunate Advanced Collapse Pattern of Degenerative Arthritis.

Watson, BalletJ Hand Surg Am19841,138 citationsRetrospective cohort

Classification and an Algorithmic Approach to the Reconstruction of Femoral Deficiency in Revision Total Hip Arthroplasty.

Valle, PaproskyJ Bone Joint Surg Am2003199 citationsRetrospective cohort

The Tibial Plateau Fracture. The Toronto Experience 1968--1975.

Schatzker, Bruce, et al.Clin Orthop Relat Res19791,029 citationsRetrospective cohort

Surgical Dislocation of the Adult Hip a Technique with Full Access to the Femoral Head and Acetabulum without the Risk of Avascular Necrosis.

Ganz, Berlemann, et al.J Bone Joint Surg Br20011,367 citationsCase series

Predictors of Humeral Head Ischemia after Intracapsular Fracture of the Proximal Humerus.

Hertel, Leunig, et al.J Shoulder Elbow Surg2004837 citationsProspective cohort

Early versus Delayed Stabilization of Femoral Fractures. A Prospective Randomized Study.

Bone, Scheinberg, et al.J Bone Joint Surg Am1989795 citationsRCT

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LetournelClin Orthop Relat Res1980715 citationsRetrospective cohort

A Novel Classification System for Spinal Instability in Neoplastic Disease: An Evidence-Based Approach and Expert Consensus from the Spine Oncology Study Group.

Fisher, Fourney, et al.Spine (Phila Pa 1976)20101,224 citationsConsensus statement

Surgical vs. Nonsurgical Treatment of Adults with Displaced Fractures of the Proximal Humerus: The PROFHER Randomized Clinical Trial.

Rangan, PROFHER Trial Collaborators, et al.JAMA2015540 citationsRCT

Lumbar Disc Herniation. A Controlled, Prospective Study with Ten Years of Observation.

WeberSpine (Phila Pa 1976)19831,149 citationsRCT

Surgical vs. Nonoperative Treatment for Lumbar Disk Herniation. The Spine Patient Outcomes Research Trial (SPORT): A Randomized Trial

Weinstein, Deyo, et al.JAMA20061,086 citationsRCT

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The Effect of Alignment and BMI on Failure of Total Knee Replacement

Ritter, Malinzak, et al.·J Bone Joint Surg Am·2011·658 citations·Retrospective cohort

|

Background

The purpose of this study was to determine the effect of tibiofemoral alignment, femoral and tibial component alignment, and body-mass index (BMI) on implant survival following total knee replacement.

Methods

We retrospectively reviewed 6070 knees in 3992 patients with a minimum of two years of follow-up.
Each knee was classified on the basis of postoperative alignment (overall tibiofemoral alignment and alignment of the tibial and the femoral component in the coronal plane).
Failures (defined as revision for any reason other than infection) were analyzed with use of Cox regression; patient covariates included overall alignment, component alignments, and preoperative BMI.

Results

Failure was most likely to occur if the orientation of the tibial component was <90° relative to the tibial axis and the orientation of the femoral component was ≥8° of valgus (failure rate, 8.7%; p < 0.0001).
In contrast, failure was least likely to occur if both the tibial and the femoral component were in a neutral orientation (≥90° and <8° of valgus, respectively) (failure rate, 0.2% [nine of 4633]; p < 0.0001).
"Correction" of varus or valgus malalignment of the first implanted component by placement of the second component to attain neutral tibiofemoral alignment was associated with a failure rate of 3.2% (p = 0.4922) for varus tibial malalignment and 7.8% (p = 0.0082) for valgus femoral malalignment.
A higher BMI was associated with an increased failure rate.
Compared with patients with a BMI of 23 to 26 kg/m2, the failure rate in patients with a BMI of ≥41 kg/m2 increased from 0.7% to 2.6% (p = 0.0046) in well-aligned knees, from 1.6% to 2.9% (p = 0.0180) in varus knees, and from 1.0% to 7.1% (p = 0.0260) in valgus knees.

Conclusions

Attaining neutrality in all three alignments is important in maximizing total knee implant survival. Substantial "correction" of the alignment of one component in order to compensate for malalignment of the other component and thus produce a neutrally aligned total knee replacement can increase the risk of failure (p = 0.0082). The use of conventional guides to align a total knee replacement provides acceptable alignment; however, the surgeon should be aware that the patient's size, as determined by the BMI, is also a major factor in total knee replacement failure.

Copyright remains with the authors and publisher.

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