Arthroplasty最新文献

Background: This study compared imageless robotic-assisted total knee arthroplasty (RATKA) with accelerometer-based navigation (ABN) systems in terms of surgical accuracy and early clinical outcomes.

Methods: A retrospective analysis was conducted on 153 patients (178 knees) who had undergone primary TKA from 2017 to 2023. Surgical accuracy and functional outcomes were assessed up to 12 months post-operation using the Chi-square test, Student's t-test, and ANCOVA. Subgroup analyses based on patient demographics were also conducted.

Results: Among 153 patients, 101 underwent RATKA, and 52 received ABN. RATKA demonstrated superior alignment accuracy with a significantly lower deviation from the planned alignment (P < 0.05). Additionally, RATKA led to significantly better postoperative functional scores at 6 weeks (P = 0.001) and 3 months (P = 0.001), even after adjusting for preoperative functional differences.

Conclusions: RATKA offers enhanced precision and improves early recovery compared to ABN, supporting its potential as a preferred technology for TKA. Its ability to optimize kinematic alignment may contribute to superior patient outcomes. Compared to ABN, RATKA provides a unique advantage by achieving greater accuracy in planned alignment, which may translate into improved functional recovery. Further research with larger cohorts is recommended to confirm these findings.

The recently-completed special edition of Arthroplasty entitled 'Advances in Artificial Intelligence and Robotics in Joint Arthroplasty', brings together novel and innovative research from around the world in this cutting edge topic area. With robotics, artificial intelligence and technology-assistance (inside and out of the operating theatre) all becoming increasingly relevant to contemporary practice, we hope the readership will find this special edition an informative and thought-provoking read. Ultimately twelve individual papers were accepted for the edition, covering a range of exciting and novel applications. There clearly exists an ongoing need to provide further validation of new applications and, in many instances, replication of results away from designer sites is needed to provide robust generalizability of use. While several of the included papers show wide international collaboration, the prospect of future interactive work engaging leaders and think-tanks regionally and globally provides a tantalizing opportunity. With global health settings under increasing pressure and scrutiny to provide greater provision of joint replacement services - with the expectation of even more predictable (better) outcomes in a cost and resource efficacious manner - necessity will continue to drive further work exploring how technology-incorporation into arthroplasty care pathways might help address many of these considerations. There are undoubtedly exciting times ahead.

Objective: The efficacy of secondary patellar resurfacing (SPR) in alleviating anterior knee pain (AKP) following total knee arthroplasty (TKA) remains uncertain. The purpose of this study was to assess the suitability of SPR using single photon emission computed tomography/computed tomography (SPECT/CT) in conjunction with triple-phase bone scan (TPBS).

Methods: We performed a retrospective analysis on a prospectively-enrolled cohort of patients suffering from AKP in the context of TKA. In this cohort, we identified a subset of 17 patients (involving 18 knees), who had unexplained AKP and were potential candidates for secondary patellar resurfacing (SPR). The candidates for SPR were designated the experimental group, and subjects receiving other forms of treatment were referred to as the Control group. The selection for these treatment options was based on the findings from SPECT/CT and triple-phase bone scan (TPBS). Data collection spanned from preoperative to postoperative follow-up periods and encompassed basic demographics, preoperative findings of SPECT/CT plus TPBS, and Knee Society Score (KSS).

Results: SPECT/CT and TPBS revealed focal radionuclide concentration in the patella in 12 patients (13 knees) and in other locations in 5 patients (5 knees) with unexplained AKP, complementing the findings from medical history and physical examinations. The Experimental group showed signs of patellar maltracking or early-stage patellofemoral osteoarthritis (OA) following TKA and received SPR treatment. Postoperatively, the objective knee indicators score was significantly higher than preoperative scores (88.46 ± 5.77 vs. 76.38 ± 7.64, P < 0.05). Similarly, the functional activities score was significantly improved postoperatively (74.31 ± 6.68 vs. 50.46 ± 9.01, P < 0.05). Patient satisfaction score was substantially elevated after SPR (33.38 ± 2.87 vs. 17.08 ± 5.69, P < 0.05). The control group mainly included patients who experienced loosening, periprosthetic joint infection (PJI), or instability. These patients received revision surgeries tailored to their individual pathologies and postoperative follow-ups showed favorable outcomes.

Conclusions: SPECT/CT in combination with TPBS may serve as a valuable tool for assessing the suitability of SPR for the post-TKA management of unexplained AKP. Video Abstract.

Background: Malpositioning of the acetabular cup represents a challenge during total hip arthroplasty (THA). The purpose of this study was to evaluate the accuracy of acetabular cup placement and early postoperative clinical outcomes with a novel, pinless, fluoroscopic-guided, robotic-assisted application for direct anterior (DA) approach THA.

Methods: This prospective, pre-market phase 2 study enrolled 19 patients undergoing THA for osteoarthritis. Standing anteriorposterior (AP) and lateral radiographs up to 1 year postoperatively were assessed for component fixation and complications. Martell Hip Analysis software was used to assess radiographic acetabular anteversion and inclination from postoperative standing AP pelvis images and the results were compared to target and final component values from the surgical logs. Patient reported outcome measures (PROMs) were collected preoperatively, four weeks, three months, and one year after operation.

Results: Mean absolute difference for anteversion and inclination from respective targets on intraoperative fluoroscopic views was 1.4° ± 1.3° (P = 0.159) and 1.3° ± 1.1° (P = 0.378). The absolute difference between postoperative radiographs and intraoperative target values was 2.91 ± 2.40° (P = 0.019) for anteversion and 3.84 ± 2.57° (P = 0.007) for inclination. The difference in target and postoperative radiographic inclination and anteversion was within 5° in 77.8% of cases, and the cup was within the Lewinnek safe zone in 16 of 18. Oxford Hip Score (OHS) (44.3 ± 4.6 vs. 22.2 ± 11.3), score on Numeric Pain Rating Scale (NRPS) (0.5 ± 1.0 vs. 5.7 ± 2.6), and Hip Osteoarthritis Outcome Score-12 (HOOS-12) Overall Score (91.4 ± 11.2 vs. 42.8 ± 20.1) were significantly improved at one year. At one-year, 88.2% and 11.8% of patients were very satisfied or satisfied.

Conclusion: This first-in-human study on THA utilizing a pinless, fluoroscopy-based robotic arm demonstrated high accuracy in terms of radiographic inclination and anteversion, excellent hip-specific functional outcomes and safety one year after operation. Video Abstract.

Background: End-stage knee osteoarthritis (OA) patients awaiting total knee replacement (TKR) often experience prolonged wait times and worsening symptoms. Whole-body vibration (WBV) has shown potential benefits in OA management. This study compared the efficacy of supervised exercise therapy alone and combined with WBV in reducing pain and improving function in this population.

Methods: In this prospective cohort study, 555 patients with end-stage knee OA awaiting TKR were allocated to three groups: Exercise (n = 227), Exercise + WBV (n = 127), and Control (n = 201). The Exercise and Exercise + WBV groups underwent an 8-week intervention comprising strength and flexibility exercises. Primary outcomes were pain (Numeric Pain Rating Scale, NPRS) and function (Knee Injury and Osteoarthritis Outcome Score, KOOS). Outcomes were assessed at baseline and after the final treatment session. Statistical analysis included ANOVA with post-hoc Bonferroni correction for baseline comparisons and paired t-tests for longitudinal comparisons. Minimal Clinically Important Difference (MCID) and Minimal Detectable Change (MDC) were calculated to assess the clinical significance of the results.

Results: Both exercise modalities significantly reduced knee pain from baseline to final session (P < 0.001). The Exercise + WBV group showed a larger reduction in NPRS score (mean ± standard deviation (SD); from 5.57 ± 1.82 to 4.65 ± 2.15) compared to the Exercise group (from 5.35 ± 2.11 to 4.88 ± 1.96), exceeding both MCID (0.94 vs. 0.45) and MDC (0.34 vs. 0.27) thresholds. The Exercise + WBV group demonstrated significant improvements in KOOS subscales (KOOS-KP: 54.31 ± 16.95 to 60.04 ± 17.13, P < 0.001; KOOS-S: 57.27 ± 19.56 to 60.50 ± 18.07, P = 0.033; KOOS-ADL: 66.99 ± 19.42 to 71.52 ± 16.32, P = 0.003), while the Exercise group did not. These improvements in KOOS subscales met or exceeded the MDC (ranging from 2.42 to 3.99) but showed variable clinical significance relative to MCID (- 0.49 to 0.04). The Exercise + WBV group also showed significant improvement in knee ROM (110.68° ± 16.52° to 115.43° ± 18.59°, P < 0.001), while the Exercise group did not.

Conclusion: Both interventions effectively reduced pain and improved function in end-stage knee OA patients awaiting TKR, with the addition of WBV leading to greater improvements in several outcomes. Particularly in pain reduction, changes exceeded both MCID and MDC thresholds, suggesting WBV's potential as a clinically valuable adjunct to exercise therapy. While some improvements in functional outcomes were statistically significant and surpassed MDC values, their clinical significance varied, future research should focus on optimizing WBV protocols and investigating long-term effects to guide clinical practice in managing patients awaiting TKR.

Background: It is important to adhere to the pertinent guidelines to ensure evidence-based rehabilitation of patients with total knee arthroplasty (TKA); however, studies have suggested that pre- and post-TKA rehabilitation provided in Japan may not be adequately evidence-based. Quality indicators (QIs) translate practice guidelines into actionable and measurable statements by identifying the clinical context, timing, and target population. This study aimed to develop QIs for pre- and post-TKA rehabilitation in Japan. Additionally, a pilot practice test was conducted to assess the feasibility and applicability of the developed QIs prior to their actual clinical application.

Methods: This study used a modified Delphi technique (RAND/UCLA Appropriateness Method). A nine-member panel of clinicians and researchers evaluated the 49 proposed QIs related to rehabilitation before and after TKA. Panelists independently rated the 49 candidate QIs on a 9-point Likert scale and discussed these QIs in an online meeting. After the meeting, the panelists independently re-rated the QIs, and QIs with a median score of 7 or higher and score of less than 3 by two or fewer panelists were adopted as the final QIs. In addition, a pilot practice test was conducted to assess the feasibility and applicability of the developed QIs by retrospectively analyzing the medical records at two hospitals.

Results: Forty-nine candidate QIs were developed based on one set of QIs, nine practice guidelines, eight best practice recommendations, and 162 systematic reviews. Finally, 36 indicators, including two new ones, were adopted consensually by nine panelists. Among these 36 indicators, some had overlapping elements, so they were consolidated and organized into 24 indicators. The pilot test (n = 352) revealed a median QI performance of 86.1 (IQR, 56.1-100), with six QIs demonstrating performance levels below 10%. This low performance indicated that the proportion of patients receiving rehabilitation in accordance with the indicators was actually low.

Conclusions: This study developed 36 QIs for patients undergoing rehabilitation before and after TKA in Japan. Although their feasibility was confirmed at two facilities, future studies are warranted to measure the quality of care more comprehensively.

Background: While the role of chronic preoperative steroid use in orthopedic outcomes has been studied, particularly in hip, knee, and lumbar surgeries, its impact on total shoulder arthroplasty (TSA) outcomes is not well understood. This study aimed to evaluate the impact of chronic preoperative steroid use on early-onset postoperative infectious outcomes and readmission within 30 days following TSA compared to patients without chronic steroid use.

Methods: A retrospective analysis was performed using data from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) spanning from 2010-2018. Clinical data including preoperative demographics, operative variables, and 30-day post-TSA outcomes were collected. Groups were balanced using propensity score matching based on gender, age, race, ethnicity, BMI, functional status, ASA, smoking status, alcohol use, year of operation, and comorbidities. A conditional logistic regression model was used to calculate odds ratios for each outcome measure.

Results: A total of 3,445 identified cases were included in this analysis after propensity score matching, with 1,157 exhibiting chronic steroid use. The steroid group demonstrated significantly greater rates of readmission (OR: 1.86; 95% CI: 1.22-2.81; P = 0.004). No significant differences were observed between groups in all other adverse outcomes, including reoperation, specific infectious outcomes, and combined infectious outcomes.

Conclusions: Preoperative chronic steroid use is an independent predictor of readmission but not infection following TSA. While the surgeon should be aware of the increased risk of readmission associated with chronic steroid use, the role of steroid use as a risk factor for postoperative infections following TSA may be less pronounced, particularly compared to surgeries of other joints. Further investigation of infectious outcomes and readmissions with longer follow-up is needed to clarify the specific role of chronic preoperative steroid use in adverse outcomes following TSA.

Revision total joint arthroplasty (TJA) is widely performed, and its incidence is increasing exponentially over time. Morbidity, mortality, as well as cost, both to the patient and the healthcare system, are significantly greater with revision TJA than primary TJA. Thus, efforts to minimize all-cause revision surgery are essential. In this special issue, we present articles on revision TJA epidemiology, surgical techniques, novel technology, implant design, and outcome optimization.

Background: As the population ages, the number of total joint arthroplasty (TJA) performed is rising, making early identification of patients at risk for adverse events essential to improving care and reducing healthcare costs. The aim of this study was to evaluate the association between Clinical Frailty Scale (CFS) and postoperative outcomes in elective total hip arthroplasty (THA) and total knee arthroplasty (TKA).

Methods: We conducted a retrospective study of prospectively collected data regarding 328 TKAs and 294 THAs at a single institution from February 2019 to February 2020. Patient demographic data were harvested, and the preoperative CFS scores were calculated for all patients and analyzed to identify their associations with the length of stay (LOS), the need for admission to an inpatient rehabilitation unit (IPRU), postoperative complications and patient-reported outcome measures (PROMs).

Results: Robust patients (CFS < 3) had a significantly shorter LOS than their non-robust (CFS > 3) counterparts in both the TKA and THA groups (3.7 vs. 5.2 days, P < 0.001, and 3.8 vs. 5.8 days, P < 0.001, respectively). IPRU admission rates were significantly higher in non-robust than in robust patients. Specifically, none of the robust TKA patients required IPRU admission, whereas up to 39 non-robust patients (11.9%) did (P < 0.001). Similarly, for THA, 9 robust (5.7%) and 30 non-robust (21.9%) patients were admitted to an IPRU (P < 0.001). Non-robust patients had a significantly higher complication rate for both THA (11.0% vs. 6.4%, P = 0.03) and TKA (8.7% vs. 2.6%, P = 0.11). Both cohorts showed significant improvements in PROMs post-surgery, with non-robust patients experiencing greater relative gains than robust patients.

Conclusions: CFS is a strong predictor of the hospital length of stay, IPRU admission, and complication rates following TJA. This study also highlighted the link between frailty and PROMs in joint replacement patients. The CFS may be a valuable tool in the preoperative assessment of elective THA and TKA.

Background: Precise implant positioning during total hip arthroplasty (THA) is an important factor influencing dislocation rate and long-term implant survival. Although a special carbon fiber traction table for THA improves the accuracy of implant positioning, it is too expensive. We aimed to report the accuracy of cup positioning and complication rate in patients undergoing THA via the direct anterior approach using a conventional noncarbon fiber traction table, which is generally used for osteosynthesis of femoral fractures.

Methods: This retrospective study included 101 patients who received primary THA via the direct anterior approach using a conventional traction table with fluoroscopy between July 2022 and October 2024. Two observers evaluated radiological outcomes using postoperative anteroposterior X-rays. The intraclass correlation coefficients of cup positioning angles were calculated (inclination: 0.92, anteversion: 0.89 for intra-observer agreement; inclination: 0.91, anteversion: 0.85 for inter-observer agreement). Complications were defined as dislocation, periprosthetic fracture, ankle fracture, implant loosening, nerve injury, surgical site infection, deep vein thrombosis, and revision surgery for any reason.

Results: Radiographic analysis showed an average cup inclination of 38.1° ± 4.1° (99.0% within Lewinnek's safe zone). The average cup anteversion was 12.0° ± 4.7° (97.0% within Lewinnek's safe zone). None of the patients experienced any complications.

Conclusion: The use of a conventional traction table to perform THA using fluoroscopy may not interfere with precise cup positioning. This technique, which does not require a special carbon fiber traction table for THA, could be a feasible alternative for performing THA at general hospitals.