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While total hip arthroplasty (THA) is an enormously successful treatment for patients with end-stage degenerative arthritis of the hip, and surgeons have optimized existing hip implants and techniques, dislocation and instability persist as a leading cause of failure. Given the tremendous success of reverse total shoulder arthroplasty in enhancing the stability of shoulder reconstruction by reversing the anatomic seating of the ball and socket components, one manufacturer (Hip Innovation Technology, LLC, Woodstock, Georgia) has developed a novel Reverse Hip Replacement System (Reverse HRS) to address the need for greater stability in reconstruction of the arthritic hip joint. Rather than the traditional anatomic components that replace the head of the femur with a spherical ball and the acetabulum with a socket with polyethylene liner mounted into the pelvis, the Reverse HRS features a cup with polyethylene liner attached to the femoral stem and a spherical metal head attached to a central trunnion inside of the porous-coated acetabular shell fixed into the pelvis. This design provides dramatically enhanced stability and improved range of motion. This article reviews relevant published literature, including results from a Canadian clinical trial and case reports from a multicenter American clinical trial monitored by the U.S. Food and Drug Administration. It also describes the components and surgical technique of reverse THA.
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Over the past few decades, instrumentation and techniques for total knee arthroplasty (TKA) have evolved from conventional manual tools to a wide range of technologies, including calibrated guides for accurate bone cuts and alignment, smart tools, dynamic intraoperative sensors for soft-tissue balancing, patient-specific guides, computer navigation, and robotics. This review is intended to provide an overview of the latest advancements in TKA technology, address potential challenges and solutions related to the application of these technologies, and explore their limitations.
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BACKGROUND: Manipulation under anesthesia (MUA) occurs in 4% of patients after total knee arthroplasty (TKA). Anti-inflammatory medications may target arthrofibrosis pathogenesis, but the data are limited. This multicenter randomized clinical trial investigated the effect of adjuvant anti-inflammatory medications with MUA and physical therapy on range of motion (ROM) and outcomes. METHODS: There were 124 patients (124 TKAs) who developed stiffness after primary TKA for osteoarthritis enrolled across 15 institutions. All received MUA when ROM was < 90° at 4 to 12 weeks postoperatively. Randomization proceeded via a permuted block design. Controls received MUA and physical therapy, while the treatment group also received one dose of pre-MUA intravenous dexamethasone (8 mg) and 14 days of oral celecoxib (200 mg). The ROM and clinical outcomes were assessed at 6 weeks and 1 year. This trial was registered with ClinicalTrials.gov. RESULTS: The ROM significantly improved a mean of 46° from a pre-MUA ROM of 72 to 118° immediately after MUA (P < .001). The ROM was similar between the treatment and control groups at 6 weeks following MUA (101 versus 99°, respectively; P = .35) and at one year following MUA (108 versus 108°, respectively; P = .98). Clinical outcomes were similar at both end points. CONCLUSIONS: In this multicenter randomized clinical trial, the addition of intravenous dexamethasone and a short course of oral celecoxib after MUA did not improve ROM or outcomes. However, MUA provided a mean ROM improvement of 46° immediately, 28° at 6 weeks, and 37° at 1 year. Further investigation in regards to dosing, duration, and route of administration of anti-inflammatory medications remains warranted. LEVEL OF EVIDENCE: Level 1, RCT.
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Artroplastia do Joelho , Celecoxib , Dexametasona , Osteoartrite do Joelho , Amplitude de Movimento Articular , Humanos , Masculino , Feminino , Idoso , Pessoa de Meia-Idade , Celecoxib/administração & dosagem , Amplitude de Movimento Articular/efeitos dos fármacos , Dexametasona/administração & dosagem , Osteoartrite do Joelho/cirurgia , Complicações Pós-Operatórias/etiologia , Resultado do Tratamento , Distinções e Prêmios , Anti-Inflamatórios/administração & dosagem , Modalidades de Fisioterapia , Articulação do Joelho/cirurgia , Articulação do Joelho/fisiopatologiaRESUMO
Fixed flexion deformities (FFDs) present several unique challenges in total knee arthroplasty (TKA) and require careful consideration to achieve optimal outcomes. FFD alters normal knee biomechanics and increases energy expenditure. They may be attributed to both bony deformities and fibrosed soft tissues, which must be addressed in stepwise fashion at the time of surgery. A literature review was conducted utilizing keywords "fixed flexion deformity TKA." This review article aims to discuss the anatomy and pathology, preoperative evaluation, classification system, surgical techniques for addressing deformity, implant selection considerations, postoperative protocols, clinical outcomes, and potential complications associated with correcting FFD. By comprehensively addressing these aspects, surgeons can optimize surgical planning and improve outcomes in patients with FFD undergoing TKA.
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BACKGROUND: Previous studies have reported excellent results with tapered, titanium, porous plasma-sprayed components in patients undergoing uncemented primary total hip arthroplasty (THA). The purpose of this study was to examine survival and clinical results at a minimum 25-year follow-up. METHODS: We reviewed all patients who underwent primary THA at our center through 1995 with a specific femoral component that was essentially unchanged since its 1984 introduction, except porous coating was continued circumferentially in 1987, a hydroxyapatite-coated option was offered in 1988, and an offset option was added in 1999. There were 332 patients (396 THA) who had a minimum 25-year follow-up (range, 25 to 37). Mean age at surgery was 48 years (range, 21 to 70 years). Mean follow-up in nonfailed patients was 29 years (range, 25 to 37 years). RESULTS: There were 31 femoral revisions (7.8%): 9 infections, 3 failures of ingrowth, 5 aseptic loosening, 8 osteolysis well-fixed, 2 periprosthetic fractures, 2 polyethylene wear with trochanteric avulsion, 1 component breakage, and 1 malalignment well-fixed. Kaplan-Meier survival with the endpoint of all-cause stem revision was 94.8% (95% confidence interval: ±0.9%) at 37 years, and with the endpoint of aseptic loosening/failure of ingrowth was 98.7% (95% confidence interval: ±0.5) at 37 years. Harris hip scores improved significantly from 43 preoperatively to 76 most recently. CONCLUSION: This tapered, titanium, porous plasma spray-coated femoral component continues to demonstrate high long-term survival with a low rate of femoral component revision for any reason or aseptic loosening/failure of ingrowth.
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Artroplastia de Quadril , Prótese de Quadril , Humanos , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Titânio , Seguimentos , Resultado do Tratamento , Porosidade , Falha de Prótese , Desenho de Prótese , Artroplastia de Quadril/métodos , Reoperação , Polietileno , Estudos RetrospectivosRESUMO
BACKGROUND: The rise in demand of knee arthroplasty has led the industry to develop methods to decrease costs of care, such as novel methods of delivering physiotherapy, including smartphone-based exercise educational platforms. The purpose of this study was to determine the noninferiority of one such system after primary knee arthroplasty as compared to traditional in-person physiotherapy. METHODS: A prospective, multicenter randomized clinical trial was conducted comparing standard of care rehabilitation to a smartphone-based care platform after primary knee arthroplasty from January 2019 to February 2020. One-year patient outcomes, satisfaction scores, and utilizations of health care resources were analyzed. A total of 401 patients was available for analysis-241 in the control and 160 in the treatment group. RESULTS: There were 194 (94.6%) patients in the control group who required 1 or more physiotherapy visits compared to only 97 (60.6%) patients in the treatment group (P < .001). Emergency department visits within 1 year occurred in 13 (5.4%) patients and 2 (1.3%) patients in the control and treatment groups, respectively (P = .03). The change in mean Knee Injury and Osteoarthritis Outcome Score for joint replacement scores at 1 year was similar between both the groups (32.1 ± 1 6.8 versus 30.1 ± 18.1, P = .32). CONCLUSION: Implementation of this smartphone/smart watch care platform showed similar outcomes to traditional care models at 1 year postoperative. Traditional physiotherapy and emergency department visits occurred at much lower rates in this cohort, which could alleviate the need for health care dollars spent by reducing postoperative costs and enhancing communication across the health care system.
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Artroplastia do Joelho , Osteoartrite do Joelho , Humanos , Artroplastia do Joelho/efeitos adversos , Seguimentos , Osteoartrite do Joelho/etiologia , Smartphone , Estudos Prospectivos , Resultado do TratamentoRESUMO
BACKGROUND: Precise indications for medial unicondylar knee arthroplasty (UKA) continue to be defined. It is unclear if patients who have proximal tibia vara should be considered candidates for UKA. The purpose of this study was to evaluate the impact of proximal tibial varus alignment on outcomes after UKA. METHODS: A retrospective review identified 2,416 patients (3,029 knees) who underwent mobile-bearing medial UKA with 2-year minimum follow-up or revision. Preoperative radiographs were evaluated, and medial proximal tibial angle (mPTA) was measured. Patients were grouped into two groups as follows: mPTA <80 degrees and mPTA ≥80 degrees. Analyses were performed on the impact of mPTA on clinical outcomes, all-cause revisions, and tibial failures. RESULTS: At a mean follow-up of 5 years (range, 0.5 years to 12.8 years), there was not a statistically significant difference in clinical outcomes nor increased risk for all-cause revision or tibial failure in patients who had an mPTA <80°. Mean mPTA in patients who had tibial failures was 82.5° and not significantly different than those who did not have a tibial failure (82.9°) (P = .289). Tibial failure rate in knees with an mPTA <80° was 2.2% and not significantly different than knees with an mPTA ≥80° at 1.4% (P = .211). The all-cause revision rate in knees with an mPTA <80° was 5.8% and was not significantly different than knees with an mPTA ≥80° at 4.9% (P = .492). CONCLUSION: Patients who have tibia vara are not at increased risk for tibial related or all-cause failure in medial UKA. This data may allow surgeons to increase their indications for medial UKA.
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Artroplastia do Joelho , Doenças do Desenvolvimento Ósseo , Prótese do Joelho , Osteoartrite do Joelho , Humanos , Osteoartrite do Joelho/cirurgia , Sobrevivência , Doenças do Desenvolvimento Ósseo/cirurgia , Articulação do Joelho/cirurgia , Estudos Retrospectivos , Tíbia/cirurgiaRESUMO
INTRODUCTION: Custom acetabular components are an increasingly utilized reconstructive option in total hip arthroplasty for catastrophic bone loss and acetabular failure. The purpose of this study was to determine the survivorship of such components for reconstruction due to catastrophic bone loss at a minimum 5-year follow-up. METHODS: From August 2003 to July 2016, 64 patients (66 hips) underwent acetabular reconstruction with custom triflange components. All hips were classified as Paprosky 3B or 3C. Harris hip scores were analyzed. Overall survivorship was determined by survival analysis. RESULTS: Seventeen patients (18 hips) died prior to returning for 5-year follow-up. One presumed living patient was lost to contact, yielding a cohort of 46 patients (47 hips) who had minimum 5-year follow-up. The mean age was 65 years (range, 46 to 85), mean body mass index was 29.4 (range, 18 to 45), and 72% were women. Mean follow-up was 8 years (range, 5 to 16). There were 3 revisions of the triflange device (6.4%) due to infection. Survivorship to end point of triflange removal for any reason was 94.1% (95% confidence interval: ±3.4%) at a mean of 16 years. In the overall series (n = 66), there were 9 (13.6%) additional reoperations as follows: 5 incision and debridements, one open reduction internal fixation, two stem revisions for periprosthetic femoral fracture, and one head revision. Harris hip scores improved significantly from a mean of 41 points preoperatively to 64 points postoperatively. CONCLUSIONS: Custom acetabular triflange components represent a highly effective tool in a surgeon's armamentarium. These devices are extremely helpful in managing catastrophic bone loss and have a good mean 16-year survival.
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Artroplastia de Quadril , Prótese de Quadril , Humanos , Feminino , Idoso , Masculino , Falha de Prótese , Acetábulo/cirurgia , Reoperação/métodos , Seguimentos , Estudos RetrospectivosRESUMO
INTRODUCTION: Medial unicompartmental knee arthroplasty (UKA) is a successful treatment for antero-medial osteoarthritis. However, there are few published studies on the long-term survival of this procedure. The purpose of this study was to review the 15-year minimum outcomes and survival of a mobile-bearing medial UKA. METHODS: A retrospective review was performed between July 2004 and December 2006 of all patients who underwent a medial UKA eligible for a minimum of 15-year follow-up. The initial query revealed 299 patients (349 knees). One hundred-seventeen patients died or were lost to follow-up, leaving 182 patients (219 knees) for analyses. Clinical outcomes and survivorship were analyzed. RESULTS: There were 59 implant-related reoperations which occurred at a mean of 10 years (range, 0 to 16 years). The most common reasons for reoperation were arthritic progression (9.1%) and aseptic loosening (9.1%). The 10-year survival with revision to TKA was 89% (95% confidence interval: 86% to 92.4%), and the 15-year survival was 84.1% (95% confidence interval: 80.3% to 88%). There were no statistically significant differences in survival between sex, body mass index, and age. Patients who were not revised had statistically significant improvements in knee range of motion and Knee Society scores. CONCLUSIONS: This study found similar long-term survival of a medial mobile-bearing UKA to published total knee arthroplasty outcomes. The implant evaluated in this study has undergone subsequent improvements in instrumentation and design. Further analyses should be performed on the long-term outcomes of the current implant platform.
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Artroplastia do Joelho , Prótese do Joelho , Osteoartrite do Joelho , Humanos , Artroplastia do Joelho/métodos , Seguimentos , Osteoartrite do Joelho/cirurgia , Resultado do Tratamento , Articulação do Joelho/cirurgia , Estudos Retrospectivos , ReoperaçãoRESUMO
Unicompartmental knee arthroplasty (UKA) has become an increasingly used procedure for patients with unicompartmental knee osteoarthritis. The success of UKA relies on appropriate patient selection and patient optimization before surgery is performed. Improved prosthesis design and surgical techniques for medial and lateral and fixed and mobile bearing UKA have also contributed to improved knee biomechanics, faster recovery, and improved outcomes. Indications, factors affecting patient selection, the role of limb alignment, and the surgical pearls for fixed and mobile bearing and medial and lateral UKA are important topics for discussion.
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Artroplastia do Joelho , Prótese do Joelho , Osteoartrite do Joelho , Humanos , Artroplastia do Joelho/métodos , Articulação do Joelho/cirurgia , Osteoartrite do Joelho/cirurgia , Desenho de Prótese , Resultado do TratamentoRESUMO
BACKGROUND: The purpose of this study is to assess the viability of a knee arthroplasty prediction model using 3-view X-rays that helps determine if patients with knee pain are candidates for total knee arthroplasty (TKA), unicompartmental knee arthroplasty (UKA), or are not arthroplasty candidates. METHODS: Analysis was performed using radiographic and surgical data from a high-volume joint replacement practice. The dataset included 3 different X-ray views (anterior-posterior, lateral, and sunrise) for 2,767 patients along with information of whether that patient underwent an arthroplasty surgery (UKA or TKA) or not. This resulted in a dataset including 8,301 images from 2,707 patients. This dataset was then split into a training set (70%) and holdout test set (30%). A computer vision model was trained using a transfer learning approach. The performance of the computer vision model was evaluated on the holdout test set. Accuracy and multiclass receiver operating characteristic area under curve was used to evaluate the performance of the model. RESULTS: The artificial intelligence model achieved an accuracy of 87.8% on the holdout test set and a quadratic Cohen's kappa score of 0.811. The multiclass receiver operating characteristic area under curve score for TKA was calculated to be 0.97; for UKA a score of 0.96 and for No Surgery a score of 0.98 was achieved. An accuracy of 93.8% was achieved for predicting Surgery versus No Surgery and 88% for TKA versus not TKA was achieved. CONCLUSION: The artificial intelligence/machine learning model demonstrated viability for predicting which patients are candidates for a UKA, TKA, or no surgical intervention.
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Artroplastia do Joelho , Osteoartrite do Joelho , Humanos , Artroplastia do Joelho/métodos , Osteoartrite do Joelho/cirurgia , Inteligência Artificial , Resultado do Tratamento , Articulação do Joelho/diagnóstico por imagem , Articulação do Joelho/cirurgia , Aprendizado de MáquinaRESUMO
BACKGROUND: Total joint arthroplasty is rapidly shifting to the outpatient space. One of the challenges of same-day discharge adoption has been determining which patients are suitable candidates. Risk assessment tools have been developed, including the Outpatient Arthroplasty Risk Assessment (OARA) score. The purpose of this study was to assess its predictive utility. METHODS: A retrospective review was performed on all total joint arthroplasties performed at a single ambulatory surgery center in 2018, yielding a cohort of 1,105 patients (1,332 arthroplasties). The institution's outpatient criteria required optimization of all medical conditions; if the patient had no failing organ, they were candidates for same-day discharge. OARA scores were calculated based on preoperative histories and physical examinations. Analyses were performed on the statistical utility of the OARA score in predicting successful same-day discharge. The mean age was 59 years (range, 27-82), the mean body mass index was 33.3 kg/m2 (range, 16-66), and 51.5% were women. A total of 45% of patients had one or more major comorbidity. RESULTS: There were 81.6% of patients who had an acceptable OARA score (<60). In addition, 97% of patients who had an "unacceptable" OARA score were successfully discharged the same day. There were 23 patients who required inpatient observation; of these, 7 (30.4%) had an OARA score ≥60. CONCLUSION: The OARA score was accurate in predicting patients who successfully had same-day discharge but poor at predicting who would not. This system is time consuming and may be too restrictive on which patients are candidates for outpatient arthroplasty. Surgeons may consider a more simplified criteria for outpatient arthroplasty.
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Artroplastia de Quadril , Artroplastia do Joelho , Humanos , Feminino , Pessoa de Meia-Idade , Masculino , Artroplastia de Quadril/efeitos adversos , Artroplastia do Joelho/efeitos adversos , Pacientes Ambulatoriais , Alta do Paciente , Medição de Risco , Estudos Retrospectivos , Complicações Pós-Operatórias/etiologiaRESUMO
Physical activity (PA) is suggested to reduce osteoarthritis pain; however, it may be avoided by patients requiring arthroplasty. Our goal was to investigate objective and patient-reported outcomes as a function of pre-operative PA levels in patients undergoing total knee arthroplasty (TKA). A total of 1941 patients enrolled in a multicenter prospective cohort study investigating a smartphone-based care management platform for self-directed rehabilitation underwent TKA and were included in the analysis. Activity was categorized based on the cohort's step count quartiles into low, moderate, and high pre-operative PA. Pre-operative and post-operative pain, EQ5D5L, KOOS JR, and step counts were compared by ANOVA according to activity group. Pre-operative pain scores increased with the decreasing activity level (all, p < 0.05) and were most improved post-operatively in the low PA group. High PA patients demonstrated the smallest improvements in EQ-5D-5L and KOOS JR. Low and moderate PA patients increased physical activity by three months, reaching 176% and 104% of pre-operative steps; high PA patients did not return to full step counts by one year post-operatively. Patients undergoing TKA who present with higher levels of physical activity report lower levels of pain and higher function pre-operatively but appreciate less improvement up to one year post-operatively. These results may be helpful in appropriate counseling of patient expectations before TKA.
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INTRODUCTION: Total knee arthroplasty (TKA) is typically performed to restore a neutral mechanical alignment. Recently, there has been increased interest in kinematic alignment to restore the patient's individual alignment. The purpose of this study is to determine if kinematic balancing reduces the need for intraoperative soft tissue releases and rates of manipulation under anesthesia compared to mechanical alignment. MATERIALS AND METHODS: A query was performed between January 2021 and July 2022 to identify all patients who underwent a primary TKA that was performed with kinematic alignment (KA), which revealed 97 patients (107 TKAs). A cohort of consecutive patients from the preceding six months was gathered of patients who underwent primary TKA with mechanical alignment (MA). This cohort consisted of 199 patients (223 TKAs), yielding a total study cohort of 296 patients (330 knees). Mean age was 64.7 years, mean body mass index (BMI) was 33.1 kg/m2, and 57.1% of patients were female. Rates of manipulation under anesthesia and intraoperative release status were analyzed. RESULTS: Average range of motion preoperatively improved from 108.9° to 114.4° in the KA group but decreased from 112.3° to 109.9° in the MA group at six weeks (p<0.0001). Three of 107 knees (2.8%) required an additional pie-crusting of the superficial MCL in the KA group, whereas 58 of 223 knees (26.0%) did in the MA group (p<0.0001). Three of 107 knees (2.8%) in the KA group and 24 of 223 knees (10.8%) in the MA group required MUA (p<0.0001). CONCLUSION: Kinematic alignment significantly reduced the need for intraoperative soft tissue releases and postoperative manipulation under anesthesia. Further studies of the influence of kinematic alignment on these outcomes across multiple surgeons should be performed and/or compared to mechanical alignment.
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INTRODUCTION: A primary total knee arthroplasty (TKA) system was introduced with a modern universal femoral design with a wide range of size and constraint options to accommodate a variety of patient anatomy, while incorporating streamlined instrumentation for maximum operating room efficiency and economy. The purpose of this study is to review the early clinical outcomes and survivorship at minimum two-year follow up with this knee system. MATERIALS AND METHODS: From September 2015 to December 2019, 797 patients (1004 knees) underwent primary total knee arthroplasty (TKA) at our center with the TJO Klassic® Complete Primary Knee System (Total Joint Orthopedics Inc., Salt Lake City, Utah) with ultracongruent bearings and were available for study with minimum two-year follow up. All office and hospital records were reviewed for patient demographics, preoperative and postoperative clinical assessments, including range of motion, Knee Society Scores (KSS), University of California at Los Angeles (UCLA) activity scales, complications, and reoperations. RESULTS: Mean follow up was 3.1 years (range, 2-6; standard deviation [SD] ±1.0). There were 471 female patients (59%) and 326 male patients (41%). Mean age at surgery was 69.3 years and mean body mass index was 32.9kg/m2. An all-polyethylene tibial component was used in 305 knees (30.4%) while a modular titanium tibial baseplate with polyethylene insert was used in 699 (69.6%). The patella was left unresurfaced in 381 knees (37.9%). KS scores, including pain component, clinical, and functional, as well as UCLA scores, all improved significantly (p<0.001). Two patients (3 knees) underwent revision. One patient required two-staged revision for treatment of infection in both knees, and one patient required patellar revision for aseptic loosening. Kaplan-Meier survival at 6.2 years was 98.4% (95% CI: ±0.97%) to endpoint of revision of any part for any cause and 99.6% (95% CI: ±0.36%) to endpoint of aseptic revision. CONCLUSIONS: At early minimum two-year follow up, this modern universal complete knee system used with ultracongruent bearings demonstrates excellent clinical outcomes and survival.
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Some of today's tough questions surrounding hip and knee arthroplasty involve modifiable risks, bilateral staging, physiotherapy, postoperative activity, venous thromboembolism and infection prophylaxis, pain management, and outpatient settings. The available literature is reviewed to provide answers to difficult questions facing the orthopaedic surgeon. Preoperative questions focus on patient selection, medical optimization, and appropriateness for outpatient surgery. Modifiable risk factors for undergoing lower extremity arthroplasty include obesity, smoking, and diabetic control. Guidelines are presented to advise which patients are suitable candidates to undergo the procedure in an outpatient setting. Perioperative questions arise regarding the use of first-generation cephalosporins for prophylaxis, topical vancomycin powder, tranexamic acid, negative-pressure dressings, local intra-articular injections, and optimal timing of staged bilateral procedures. Postoperative questions are often raised about the necessity of formal postoperative physical therapy, when can patients resume driving after arthroplasty, should patients return to high-level sporting activity, and how long should patients be advised to take antibiotic prophylaxis for dental procedures.
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Artroplastia de Quadril , Artroplastia do Joelho , Antibioticoprofilaxia , Artroplastia de Quadril/efeitos adversos , Artroplastia do Joelho/efeitos adversos , Humanos , Fatores de RiscoRESUMO
BACKGROUND: Survivorship of total hip arthroplasty (THA) in younger patients is concerning given the inverse relationship between age and lifetime risk for revision. The purpose of this study is to determine if risk of revision has improved for patients aged 55 years or younger who undergo primary THA using modern polyethylene liners. METHODS: A retrospective review identified 2,461 consented patients (2,814 hips) with minimum 2-year follow-up who underwent primary THA at our institution between September 2007 and August 2014 using components from a single manufacturer (Zimmer Biomet), all with vitamin E-infused highly crosslinked polyethylene acetabular inserts. There were 561 patients (643 THA; 23%) aged 55 or younger and 1,900 (2,171 THA; 77%) older than 55. RESULTS: Mean follow-up was 5.0 years for both groups. There were more male patients in the younger (55%) than older (41%) group. Body mass index (BMI) was higher in younger patients independent of gender. Improvement in Harris hip score (HHS) was similar between groups. Kaplan-Meier survival to endpoint of all cause revision was similar between groups at 12 years (P = .8808) with 97.5% (95% CI: ±0.7%) for younger versus 97.1% (95% CI: ±0.6%) for older patients. Most frequent reason for revision overall was periprosthetic femoral fracture (21; 0.75%); univariate analysis revealed risk factors were female gender (P = .28) and age ≥65 years (P = .012). CONCLUSION: Use of modern polyethylene, such as vitamin E-stabilized highly cross-linked, liners during THA may improve survivorship in younger patients undergoing THA. Younger patients undergoing primary THA with highly cross-linked polyethylene liners had no increased rate of revision at mid-term follow-up.
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Artroplastia de Quadril , Prótese de Quadril , Fraturas Periprotéticas , Artroplastia de Quadril/efeitos adversos , Feminino , Seguimentos , Prótese de Quadril/efeitos adversos , Humanos , Masculino , Pessoa de Meia-Idade , Fraturas Periprotéticas/etiologia , Polietileno , Desenho de Prótese , Falha de Prótese , Reoperação , Estudos Retrospectivos , Resultado do Tratamento , Vitamina ERESUMO
Many strategies have been employed to improve operating room efficiency when performing total knee arthroplasty. The goals of efficiency improvements are to decrease operative time and reduce healthcare expenses while providing patients the best quality surgical care. Single-use disposable instruments are one technique to accomplish efficiency. The authors describe their experience with a specific implant manufacturer's disposable single-use instruments for total knee arthroplasty and analyze the cost and time savings compared to traditional instrumentation. Single-use disposable instruments are a viable option to improve OR efficiency, decrease sterile processing burden, and ensure sterile instrumentation for total knee arthroplasty. Furthermore, cost savings can be realized based on an institution's sterile processing expenses and whether the manufacturer or facility covers the cost of the single-use instruments.
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Artroplastia do Joelho , Artroplastia do Joelho/métodos , Redução de Custos , Humanos , Salas Cirúrgicas , Duração da Cirurgia , Instrumentos CirúrgicosRESUMO
BACKGROUND: The purpose of this study was to evaluate the correlation between objective knee range of motion (ROM) and patient "happiness" with knee ROM after total knee arthroplasty. METHODS: This was a retrospective review of all primary total knee arthroplasties from June through December 2019, yielding 902 patients (1,009 knees). Records were reviewed for knee ROM preoperatively and postoperatively at 6-week follow-up as well as whether patients self-reported being "Happy with their ROM" (HWROM). Clinical records were reviewed for documents ROM as well as manipulation under anesthesia (MUA). RESULTS: The mean preoperative ROM was 110 ± 16 degrees, and 40% of patients were happy with their ROM. Postoperatively, the mean ROM was 106 ± 13 degrees (P < .001), and 76% of patients were HWROM (P < .001). The mean change in knee ROM was (-) 5 ± 17 degrees. The mean postoperative ROM and change in ROM of patients who were HWROM after surgery were 109 ± 12 degrees and (-)2 ± 16 degrees. In patients not HWROM postoperatively, the mean ROM and change in ROM were 98 ± 14 degrees and (-)12 ± 18 degrees (P < .001). Patients with a lower preoperative ROM were statistically significantly more likely to have a positive change in their HWROM (f ratio = 41, P < .001). MUAs were performed in 7.2% of knees, and 28% of patients who underwent an MUA were HWROM before MUA. CONCLUSION: Early postoperative knee ROM was correlated with patient HWROM. However, further longer term follow-up and more detailed analysis of patient happiness with ROM are needed.
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Artroplastia do Joelho , Felicidade , Humanos , Articulação do Joelho/cirurgia , Medidas de Resultados Relatados pelo Paciente , Amplitude de Movimento Articular , Estudos Retrospectivos , Resultado do TratamentoRESUMO
BACKGROUND: The purpose of this study is to report midterm outcomes and survivorship of a bicruciate retaining knee arthroplasty compared with a bicruciate sacrificing anterior stabilized knee arthroplasty. METHODS: A retrospective comparative cohort analysis was performed of all patients who underwent primary total knee arthroplasty with the bicruciate retaining (XP) knee arthroplasty compared with an anterior stabilized (AS) cruciate sacrificing bearing. The XP system was used in 195 knees and was compared with 1471 knees in which the AS bearing was used. Patients were included in analysis if they had minimum 2-year follow-up or had a revision at any point. Preoperative and postoperative range of motion, Knee Society Scores, complications, and reoperations were evaluated. Unpaired t-test and chi-square analysis were performed. Kaplan-Meier survival analysis was performed for all-cause and aseptic survival. RESULTS: At an average of 5.2-year follow-up, 22 (11.3%) XP knees had been revised, compared with 23 (1.6%) AS knees (P < .001). Nineteen (9.7%) XP knees were revised for aseptic tibial loosening; one (0.1%) of the AS knees was revised for the same (P < .001). Nineteen of the XR revision surgeries (86.4%) were for aseptic tibial loosening. Compared with AS knees, the XP knees had significantly lower improvement in range of motion (3.2 deg vs 2.2 deg, P < .001), Knee Society (KS) pain scores (39 vs 35.7, P = .014), KS clinical scores (52.4 vs 46, P < .001), and KS functional scores (20.9 vs 15.5, P = .01). CONCLUSION: The bicruciate retaining Vanguard XP Total Knee System demonstrated an unacceptably high rate of aseptic tibial loosening without conferring the benefit of improved postoperative function relative to other available bearings.