scholarly journals The Impact of Pre-Operative Mental Health and Depression on Outcomes after Total Ankle Arthroplasty

2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0018
Author(s):  
Daniel J. Cunningham ◽  
John Steele ◽  
Samuel B. Adams

Category: Ankle Introduction/Purpose: Poor pre-operative mental health and depression have been shown to negatively impact patient- reported outcomes (PROMs) after a broad array of orthopaedic procedures involving the spine, hip, knee, shoulder, and hand. However, the relationship of mental health and patient-reported outcomes in foot and ankle surgery is less clear. The purpose of this study is to characterize the impact of pre-operative mental health and depression on patient-reported outcomes after total ankle arthroplasty. The study hypothesis is that depression and decreased SF36 MCS will be significantly associated with diminished improvement in PROMs after total ankle arthroplasty. Methods: All patients undergoing primary TAA between January 2007 and December 2016 who were enrolled into a prospective, observational study and who had at least 1 to 2-year minimum study follow-up were included. Patients were separated into 4 groups based on the presence or absence of SF36 MCS<35 and diagnosis of depression. Pre-operative to post- operative change scores in the SF36 physical and mental component summary scores (PCS and MCS), Short Musculoskeletal Function Assessment (SMFA) function and bother components, and visual analog scale (VAS) pain were calculated in 1 to 2-year follow-up. Multivariable, main effects linear regression models were constructed to evaluate the impact of SF36 and depression status on pre-operative to 1 to 2-year follow-up change scores with adjustment for age, sex, race, body mass index, current smoking, American Society of Anesthesiologist’s score, smoking, and Charlson-Deyo comorbidity score. Results: As in Table 1, adjusted analyses demonstrated that patients with MCS<35 and depression had significantly lower improvements in all change scores including SF36 MCS (-5.1 points) and PCS (-7.6 points), SMFA bother (6 points) and function scores (5.7 points), and VAS pain (7.5 points) compared with patients that had SF36>=35 and no depression. Patients with MCS<35 and no depression had significantly greater improvement in SF36 MCS (5.3 points) compared with patients that had MCS>=35 and no depression. Patients with MCS>=35 and depression had significantly lower improvement in SF36 MCS (-3.2 points) compared with patients that had MCS>=35 and no depression. Adjusted analyses of minimum 5-year outcomes demonstrated significantly increased improvement in MCS and SMFA function for patients with pre-operative MCS<35 and no depression. Conclusion: Presence of depression and decreased SF36 MCS are risk factors for diminished improvement in PROMs. Patients with depression and decreased MCS should be counseled about their risk of diminished improvement in outcomes compared to peers. As PROM’s become part of physician evaluations, it is becoming increasingly important to identify factors for diminished improvement outside of the physician’s control. [Table: see text]

2019 ◽  
Vol 4 (2) ◽  
pp. 2473011419S0000
Author(s):  
James Lachman ◽  
Michel Taylor ◽  
Elizabeth Cody ◽  
Daniel Scott ◽  
James A. Nunley ◽  
...  

Category: Ankle Arthritis Introduction/Purpose: The Scandinavian Total Ankle Replacement(STAR) system and Salto Talaris(ST) total ankle system are two of the more commonly studied total ankle implants. As the STAR is one of the oldest total ankle arthroplasty (TAA) implants still in use today, most studies focus on longevity and survivorship. Reported rates of cyst formation for these two prosthesis in most series vary from 11-22% but no large study has focused on surgical management of these cysts or included patient reported outcomes after surgery. In this series, we aimed to investigate rates of cyst formation between mobile(MB) and fixed-bearing(FB) TAA and examine clinical and patient reported outcomes of bone grafting or cementing of large cysts surrounding the STAR and ST implants. Methods: A prospectively collected database at a high volume total ankle replacement center was retrospectively reviewed to identify patients who underwent TAA with either the STAR or the ST total ankle system between 2007 and 2015. Cysts were identified and measured on standard weight bearing radiographs and confirmed on computed tomography(CT) when available. Visual analog scale (VAS) score, Short Form-36 (SF-36) physical and mental component scores, Short Musculoskeletal Function Assessment(SMFA), and AOFAS hindfoot scores were collected from all patients preoperatively and then at 6 months, 1 year and annually postoperatively. Patients with a minimum 2 years follow-up who underwent revision TAA secondary to catastrophic bone cysts or who were managed with either curettage and bone grafting or curettage and cementing of bone cysts surrounding the TAA prosthesis were included in the patient reported outcomes (PRO) analysis Results: Excluding 53 patients for inadequate follow-up, 232 patients (29% female, 71% male; follow-up 6.7 years) who underwent STAR-TAA and 147 patients (26.6% female, 73.5% male; follow-up 7 years) who underwent ST-TAA were identified. Cysts <20 mm diameter occurred more often in the MB TAAs, and more often in the tibia than talus (table). Cysts >10 mm were identified in 95/232 (41%) STAR and 24/147 (16%) ST ankles. In the STAR group, 24 patients underwent cyst bone grafting (13), cementing (6) or both (8) at a mean 4.8 years. In the ST group, 14 patients underwent cyst bone grafting (6), cementing (4), or both (4) at a mean of 2.7 years. PRO data improved significantly for both the STAR and ST group in all questionnaires (p<0.05 for all). Conclusion: Mobile-bearing total ankle arthroplasty in this cohort had a higher rate of cyst formation greater than 10 mm (95/232 patients, 41%) when compared to a fixed-bearing TAA (24/147, 16.3%). Only 24/95 (25%) of STAR patients and 14/24 (58%) of ST patients required surgical intervention for cyst management. Patient reported outcomes after cyst surgery improved significantly when compared to pre-cyst management surgery and did not differ between MB and FB cohorts (p=0.424). Successful surgical management of large cyst surrounding either mobile-bearing or fixed-bearing total ankle systems can be expected based on the results of this study. [Table: see text]


2019 ◽  
Vol 40 (9) ◽  
pp. 1037-1042
Author(s):  
Koichiro Yano ◽  
Katsunori Ikari ◽  
Ken Okazaki

Background: Ankle disorders in patients with rheumatoid arthritis (RA) reduce their quality of life and activities of daily living. The aim of this study was to evaluate the midterm clinical and radiographic outcomes of TAA in patients with RA. Methods: This retrospective study included patients with a minimum follow-up of 2 years. A total of 37 RA patients (39 ankles) were enrolled in this study from August 2006 to March 2016. All the patients had undergone primary cemented mobile-bearing total ankle arthroplasty (TAA). Nine ankles received arthrodesis of the subtalar joint simultaneously. Patient-reported outcomes were measured preoperatively and at the latest follow-up by Self-Administered Foot-Evaluation Questionnaire (SAFE-Q). Radiographs of the ankle were analyzed preoperatively and at all follow-up visits to measure the periprosthetic radiolucent line, migration of the tibial component, and the subsidence of the talar component. Intraoperative and postoperative complications were recorded. The average duration of follow-up for the entire cohort was 5.0 ± 2.0 years (range 2.1-10.1 years). Results: All subscales of the SAFE-Q had improved significantly at the latest follow-up. No significant difference was found between the range of motion of the ankle before and after the surgery. Radiolucent lines were observed in 28 (73.7%) ankles. Migration of the tibial component and subsidence of the talar component were found in 8 (21.1%) and 11 (28.9%) ankles, respectively. Intraoperative malleolus fractures occurred in 3 (7.7%) ankles and delayed wound healing in 10 (25.6%) ankles. Four ankles were removed because of deep infection or noninfective loosening, resulting in an implant survival rate of 88.4% (95% CI, 0.76-1.0) at 10 years. Conclusion: The midterm patient-reported outcomes and implant retention rate after cemented mobile-bearing TAA for RA patients were satisfactory. However, a low radiographic implant success rate was observed. Level of Evidence: Level IV, retrospective case series.


2018 ◽  
Vol 12 (3) ◽  
pp. 238-245 ◽  
Author(s):  
Constantine A. Demetracopoulos ◽  
Elizabeth A. Cody ◽  
Samuel B. Adams ◽  
James K. DeOrio ◽  
James A. Nunley ◽  
...  

Introduction. Failure to correct coronal deformity at the time of total ankle arthroplasty (TAA) can lead to early implant failure. We aimed to determine clinical, radiographic, and patient-reported outcomes of patients with moderate to severe valgus deformity who underwent TAA for end-stage ankle arthritis. Methods. Patients with a valgus deformity of at least 10° who underwent TAA were retrospectively reviewed. The coronal tibiotalar angle was assessed on radiographs preoperatively, at 1 year, and at final follow-up. The visual analog scale (VAS) for pain, Short Form-36 (SF-36), American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot-ankle scale, and Short Musculoskeletal Function Assessment (SMFA) scores were assessed preoperatively and at final follow-up. Results. Mean preoperative valgus deformity was 15.5 ± 5.0°, and was corrected to a mean of 1.2 ± 2.6° of valgus postoperatively. VAS, SF-36, AOFAS, and SMFA scores improved significantly ( P < .001 for all). There was no significant change in tibiotalar angle between 1 year and final follow-up in either group. Reoperation and revision rates did not differ between groups. Conclusion. Correction of coronal alignment was achieved and maintained in patients with both moderate and severe preoperative valgus malalignment. Outcome scores significantly improved for all patients. Levels of Evidence: Therapeutic, Level IV


2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0027
Author(s):  
Evan M. Loewy ◽  
Robert B. Anderson ◽  
Bruce E. Cohen ◽  
Carroll P. Jones ◽  
W. Hodges Davis

Category: Ankle Arthritis Introduction/Purpose: Total ankle arthroplasty (TAA) has been shown to be a viable option in the treatment of end stage ankle arthritis (ESAA). Early reports demonstrated good results with intramedullary fixation implants. Third generation implants of this kind added a central sulcus to the talar component. This is a report of clinical follow up data from a prospectively collected database at a single US institution using a third generation fixed bearing total ankle arthroplasty implant with a stemmed tibial component and a talar component with a central sulcus. To our knowledge, this is the first report of 5 year follow up data for this implant. Methods: Patients undergoing primary TAA at a single institution by one of four fellowship trained orthopedic foot and ankle surgeons with a third generation fixed bearing implant consisting of an intramedullary stemmed tibial component and a sulcus talus that were at least 5 years postoperative were reviewed from a prospectively collected database. These patients were followed at regular intervals with history, physical examination and radiographs; multiple patient reported outcomes (PRO) measures were obtained. Primary outcomes included implant survivability and PRO scores. Secondary outcomes included coronal plane radiographic alignment (Medial distal tibial articular angle (MDTA) and talar tilt angle (TTA)), evaluation for osteolysis, and failure mode when applicable. All reoperation events were recorded using the Canadian Orthopedic Foot and Ankle Society (COFAS) Reoperations Coding System (CROCS). Results: 121 TAA with this implant were performed in 119 patients between 2010 and 2013; 64 met inclusion criteria. The mean age at surgery was 61.3 ± 10.0 years (range 38.7-84.3). The mean duration of follow up for living patients that retained both initial components at final follow-up was 6.1 ± 0.9 years (range 4.7 – 8.1 years). 26.6% of ankles had a preoperative MDTA and/or TTA greater than 10 degrees. There were 6 (9.4%) failures that occurred at a mean 2.0 ± 1.4 years postoperative. Two failures were due to deep infection. Only one failure was related to tibial component subsidence. One patient is currently scheduled for revision due to talar component subsidence. Conclusion: This cohort of TAA patients with minimum 5 year follow up using a third generation fixed bearing implant demonstrates acceptable implant survival, improved patient reported outcomes scores and maintenance of coronal plane alignment. These data also suggest tolerance of a larger preoperative deformity with improved implant design. To our knowledge, this is the first report with 5 year data on this implant. Continued follow up and reporting is needed to ensure that these favorable outcomes are maintained. Additionally, further investigation on acceptable coronal plane alignment correction with TAA is needed to determine the possible limitations of this procedure.


2020 ◽  
Vol 41 (8) ◽  
pp. 893-900
Author(s):  
John R. Steele ◽  
Daniel J. Cunningham ◽  
Cynthia L. Green ◽  
Thomas J. Risoli ◽  
James K. DeOrio ◽  
...  

Background: Characteristics of responders, or those who achieve a clinical improvement above the level of a minimal clinically important difference, have not been defined for total ankle arthroplasty (TAA). The purpose of this study was to determine patient characteristics that distinguish possible responders from possible nonresponders after TAA using criteria established for other arthroplasty surgeries. Methods: Patients undergoing TAA who were enrolled into a prospective study at a single academic center evaluating patient-reported outcomes were included. Patients were characterized as possible responders if the relative or absolute improvement in their 2-year follow-up Short Musculoskeletal Function Assessment (SMFA) function score was at least 50% or 20, respectively, compared with their preoperative score, consistent with Outcome Measures in Rheumatoid Arthritis Clinical Trials and the Osteoarthritis Research Society International (OMERACT-OARSI) responder criteria. Patient factors were then associated with possible responder or nonresponder status and a multivariable analysis was performed. A total of 491 patients with complete data and 2-year follow-up were included in this study. Results: Multivariable analysis demonstrated that a higher baseline 36-Item Short-Form Survey (SF-36) mental component summary (MCS) score (OR [95% CI], 1.02 [1.01, 1.04]; P = .003), indicating better mental health, was associated with being a possible responder to TAA. The presence of rheumatic disease (OR [95% CI], 0.38 [0.22, 0.67]; P = .001) was a significant predictor of being a possible nonresponder. Conclusion: Our data reveal that a higher baseline SF-36 MCS score was associated with increased improvement in SMFA function scores, while rheumatic disease was associated with worse improvement in SMFA function scores after TAA. Patients with rheumatic disease or poor mental health may not achieve as favorable results after TAA and should be counseled appropriately. Level of Evidence: Level III, retrospective comparative study.


2019 ◽  
Vol 41 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Sameer Desai ◽  
Jason M. Sutherland ◽  
Alastair Younger ◽  
Murray Penner ◽  
Andrea Veljkovic ◽  
...  

Background: Patient-reported outcomes are becoming common for measuring patient-centric outcomes in surgery. However, there is little known about the relationship between postoperatively collected patient-reported outcomes and objective clinical outcomes. The objective of this study was to measure whether postoperative Ankle Osteoarthritis Scale (AOS) values were associated with risk of revision among patients having ankle arthrodesis or total ankle arthroplasty for treatment of symptomatic end-stage ankle arthritis. Methods: This is a retrospective analysis of a longitudinal cohort of ankle arthrodesis and total ankle arthroplasty patients. A single center recruited patients between 2003 and 2013 and follow-up was at least 4 years. Patients completed the AOS preoperatively and annually following surgery. An extended Cox regression model incorporating time-varying AOS values was used to model risk of failure. A total of 336 patients and 348 ankles were included, representing 139 ankle arthrodesis procedures and 209 total ankle arthroplasties. Results: The median follow-up time for revisions was 8.2 years and 46 patients had a revision. Higher values of patients’ AOS scores in the postoperative period were associated with a higher likelihood of revision (hazard ratio, 1.04 per 1-point increase; 95% confidence interval, 1.03-1.05). Ankle arthrodesis was associated with a reduced risk of revision compared with ankle fusion (hazard ratio, 0.12; 95% confidence interval, 0.03-0.49). Conclusion: This study showed that persistent pain and poor function after fusion or replacement surgery, as measured by elevated values of the AOS, were associated with higher risk of further surgery. Level of Evidence: Level III, retrospective cohort study.


2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0041
Author(s):  
Guilherme Saito ◽  
Austin Sanders ◽  
Cesar de Cesar Netto ◽  
Martin O’Malley ◽  
Scott Ellis ◽  
...  

Category: Ankle Arthritis Introduction/Purpose: With the increasing use of total ankle arthroplasty (TAA), new implants with varied configurations are being developed every year. This study aims to provide the early complications, reoperations and radiographic and clinical outcomes of the Infinity TAA. To date, clinical results of this novel fixed-bearing implant have not been published. Methods: A retrospective analysis of 64 consecutive ankles that underwent a primary Infinity TAA from July 2014 to April 2016 was performed. Patients had an average follow-up of 24.5 (range, 18-39) months. Medical records were reviewed to determine the incidence of complications, reoperations and revisions. Radiographic outcomes included preoperative and postoperative tibiotalar alignment, tibial implant positioning, the presence of periprosthetic radiolucency and cysts, and evidence of subsidence or loosening. Additionally, patient-reported outcomes were analyzed with the Foot and Ankle Outcome Score (FAOS) preoperatively and 1-year postoperatively. Results: Survivorship of the implant was 95.3%. Fourteen ankles (21.8%) presented a total of 17 complications (Table 1). A total of 12 reoperations were necessary in 11 ankles (17.1%). Revision surgery was indicated for 3 ankles (4.7%) due to isolated subsidence of the tibial implant in 2 cases and due to subsidence of both the tibial and talar components in 1 case. Tibiotalar coronal deformity was significantly improved after surgery (P < .0001) and maintained during latest follow-up (P = .81). Periprosthetic radiolucent lines were observed around the tibial component in 20 ankles (31%) and around the talar component in 2 ankles (3.1%). A tibial cyst was observed in 1 ankle (1.5%). Outcome scores were significantly improved for all FAOS components analyzed (P < .0001). Conclusion: Most complications observed in the study were minor and successfully treated with a single reoperation procedure or nonoperatively. Failures and radiographic abnormalities were most commonly related to the tibial implant. Further studies with longer follow-up are needed to evaluate the survivorship of the tibial implant in the long-term.


2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0021
Author(s):  
Amanda N. Fletcher ◽  
Gregory F. Pereira ◽  
Mark E. Easley ◽  
James A. Nunley ◽  
James K. DeOrio

Category: Ankle; Ankle Arthritis Introduction/Purpose: The utilization of total ankle arthroplasty has increased over the past decade, including bilateral TARs. The risk-benefit profiles of staged versus simultaneous joint arthroplasty continues to be debated in the literature. Previous studies of the hip and knee have demonstrated simultaneous bilateral surgery is associated with shorter hospitalization, shorter recovery and rehabilitation time, and decreased cost without increasing perioperative morbidity or mortality. There are limited case series reporting outcomes after bilateral TAR with no previous comparison of simultaneous versus staged TAR. Thus, we aim to compare our experience with bilateral simultaneous versus staged TARs including perioperative complications and patient reported outcomes. Methods: We performed a retrospective study on 62 patients (124 ankles) undergoing primary TAA (CPT 27702) from 2008 at a single academic center. Inclusion criteria were primary bilateral TAA performed in staged or simultaneous fashion in patients over the age of 18 years-old. Exclusion criteria were patients with less than one-year follow-up. Patient demographics, comorbidities, concomitant procedures, perioperative complications, and patient reported outcomes were also collected. Patient reported outcomes included preoperative and postoperative visual analog scale (VAS) for pain, the Short Form-36 (SF-36) Health Survey, the American Orthopaedic Foot & Ankle Society (AOFAS) score, the Foot and Ankle disability Index (FADI) score, and the Short Musculoskeletal Function Assessment (SMFA) bother and function sub-scores. Every patient had separate outcome scores available for each ankle. Univariate and multivariable tests of significance were used to relate patient and operative characteristics to outcomes. Separate subgroup analyses were performed comparing stages versus simultaneous surgeries. Results: The mean age was 63.7 years-old with a mean duration of 40.5 months of clinical follow-up. There were no significant pre-operative differences between simultaneous and staged groups in terms of age, gender, BMI, ASA classification, or arthritis etiology (p>0.05). The majority (54.5%) of patients had primary or secondary arthritis. Comorbidities were similar between the two groups with the exception of the simultaneous cohort having a higher proportion of previous smokers (56.3 vs 26.1, p=0.0020) and coronary artery disease (19.8 vs 6.5, 0.0447). There was no difference in perioperative complications between the groups(p= 0.4652). Both cohorts significantly improved in all reported patient reported outcomes at final follow-up (<0.001) without a difference in overall improvement between groups (p >0.05) (Table 1). Conclusion: The prevalence of osteoarthritis (primary arthritis) and inflammatory arthritis (secondary arthritis) was higher in patients with bilateral end-stage arthritis necessitating a TAR than previous reports of unilateral TAR. The results of bilateral simultaneous TAA, including perioperative complications and patient reported outcomes, are comparable to patients undergoing staged TAA. We advocate that simultaneous bilateral TAA is a safe and effective method the treatment of bilateral end-stage ankle osteoarthritis in a setting where experienced surgeons are available. Potential benefits of simultaneous TAR for further investigation include decreased: anesthesia events, surgery time, length of hospitalization, recovery and rehabilitation time, and overall cost. [Table: see text]


2019 ◽  
Vol 4 (1) ◽  
pp. 247301141881302
Author(s):  
James R. Lachman ◽  
Jania Arcia Ramos ◽  
Samuel B. Adams ◽  
James A. Nunley ◽  
Mark E. Easley ◽  
...  

Background: Metal component failure in total ankle arthroplasty (TAA) is difficult to treat. Traditionally, conversion to an arthrodesis has been advocated. Revision TAA surgery has become more common with availability of revision implants and refinement of bone-conserving primary implants. The goal of this study was to analyze the clinical results and patient-reported outcomes for patients undergoing revision total ankle arthroplasty. Methods: We retrospectively reviewed prospectively collected data on 52 patients with a mean age of 63.5 ± 9.6 years who had developed loosening or collapse of major metal components following primary TAA. These patients were compared to a case-matched control group of 52 primary TAAs performed at the host institution with a minimum of 2 years’ follow-up. Cases of isolated polyethylene exchange, infection, or extra-articular realignment procedures were excluded. The American Orthopaedic Foot & Ankle Society (AOFAS) hindfoot score, Short Form 36 (SF-36), Short Musculoskeletal Function Assessment (SMFA), and pain scores were prospectively collected. Clinical data was collected through review of the electronic medical record to identify reasons for clinical failure, where clinical failure was defined as second revision or conversion to arthrodesis or amputation. Results: The identified causes of failure of primary TAA were aseptic loosening of both components (42%), talar component subsidence/loosening (36%), coronal talar subluxation (12%), tibial loosening (8%), and talar malrotation (2%). Thirty-one patients (59.5%) underwent revision of all components, 20 (38.5%) just the talar and polyethylene components, and one (2%) the tibial and polyethylene components. The average time to revision was 5.5 years ± 5.4 with a follow-up of 3.1 years ± 1.5 after revision. Eleven (21.2%) revision arthroplasties required further surgery: 6 required conversion to arthrodesis and 5 required second revision TAA. Pain scores, SF-36 scores, SMFA scores, and AOFAS Hindfoot scores all improved after revision surgery but never reached the same degree of improvement seen after primary TAA. Conclusions: Clinical and patient-reported outcomes of revision ankle arthroplasty after metal component failure significantly improved after surgery, although the recovery time was longer. In this series, 21.2% of revision TAAs required a second revision TAA or arthrodesis surgery. Various prostheses performed similarly when used for revision surgery. Revision TAA can offer significant improvements postoperatively. Level of Evidence: Level III, therapeutic.


2019 ◽  
Vol 13 (Supl 1) ◽  
pp. 64S
Author(s):  
Guilherme Honda Saito ◽  
Austin Sanders ◽  
Cesar Cesar Netto ◽  
Martin O'Malley ◽  
Scott Ellis ◽  
...  

Introduction: With the increasing use of total ankle arthroplasty (TAA), new implants with varied configurations are being developed every year. This study aimed to assess the early complications, reoperations, and radiographic and clinical outcomes of this novel implant. Methods: A retrospective analysis of 64 consecutive ankles that underwent a primary Infinity® TAA was performed. Patients had an average follow-up of 24.5 (range, 18-39) months. Medical records were reviewed to determine the incidence of complications, reoperations, and revisions. Additionally, patient-reported outcomes were analyzed with the Foot and Ankle Outcome Score (FAOS). Results: Survivorship of the implant was 95.3%. Fourteen ankles (21.8%) presented a total of 17 complications. A total of 12 reoperations were necessary in 11 ankles (17.1%). Revision surgery was indicated for 3 ankles (4.7%) as a result of subsidence of the implant. Tibiotalar coronal deformity was significantly improved after surgery (P < .0001) and maintained at the latest follow-up (P = .81). Periprosthetic radiolucent lines were observed around the tibial component in 20 ankles (31%) and around the talar component in 2 ankles (3.1%). A tibial cyst was observed in 1 ankle (1.5%). Outcome scores were significantly improved for all FAOS components analyzed (P < .0001). Conclusion: Most complications observed in the study were minor and successfully treated with a single reoperation procedure or nonoperatively. Failures and radiographic abnormalities were most commonly related to the tibial implant. Further studies with longer follow-ups are needed to evaluate the survivorship of the tibial implant over the long term.


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