Impact of COVID-19 on Pulmonary Embolism Rates in Patients Undergoing Total Joint Arthroplasty.

BACKGROUND: The purpose of this study was to evaluate the incidence and severity of pulmonary embolism (PE) in patients undergoing total hip and knee arthroplasties after the onset of the coronavirus disease 2019 (COVID-19) pandemic. MATERIALS AND METHODS: Patients who underwent a total hip arthroplasty or a total knee arthroplasty between 2017 and 2022 and had a PE within 90 days postoperatively were included. Demographics, medical history, procedural information, and PE outcomes were collected and evaluated. RESULTS: There were 5933 procedures and 17 PE events (0.27%) before COVID-19 compared with 3273 procedures and 16 PE events (0.49%) after COVID-19 (P=.12). There was an increase in intensive care unit admission after COVID-19 (44% vs 0%, P<.05). CONCLUSION: This study showed a trend toward an increased incidence of PE events in the post-COVID-19 cohort and a statistically significant increase in the severity. [Orthopedics. 202x;4x(x):xx-xx.].

Older Age, Male Sex, and Early Start Time Lengthen the Recovery Room Stay Following Total Joint Arthroplasty in an Ambulatory Surgical Center.

Background: Total joint arthroplasty (TJA) performed in the ambulatory surgical center (ASC) has been shown to be safe and cost-effective for an expanding cohort of patients. As criteria for TJA in the ASC become less restrictive, data guiding the efficient use of ASC resources are crucial. Purpose: We sought to identify factors associated with length of stay in the recovery room after primary total hip arthroplasty (THA) and total knee arthroplasty (TKA) performed in the ASC. Methods: We conducted a retrospective review of 411 patients who underwent primary THA or TKA at our institution's ASC between November 2020 and March 2022. We collected patient demographics, perioperative factors, success of same-day discharge (SDD), and length of time in the recovery room. Results: Of 411 patients, 100% had successful SDD. The average length of time spent in recovery was 207 minutes (SD: 73.9 minutes). Predictors of longer time in recovery were increased age, male sex, and operative start time before 9:59 am. Body mass index, preoperative opioid use, Charlson Comorbidity Index, type of surgery (THA vs TKA), urinary retention risk, and type of anesthesia (spinal vs general) were not significant predictors of length of time in the recovery room. Conclusion: In this retrospective study, factors associated with increased length of time in the recovery room included older age, male sex, and operative start time before 9:59 am. Such factors may guide surgeons in determining the optimal order of cases for each day at the ASC, but further prospective studies should seek to confirm these observations.

Social Risk Determinants for Successful Same Calendar Day Discharge in Total Joint Arthroplasty.

Background: While many studies have examined the impact of comorbidities on the success of same calendar day discharge (SCDD) in total joint arthroplasty (TJA), literature surrounding the impact of social determinants is lacking. Purpose: We sought to investigate the relationship between various social determinants and success of SCDD after primary total hip arthroplasty (THA) and total knee arthroplasty (TKA). Methods: We conducted a retrospective review of 1160 THA and 1813 TKA performed at a single academic institution between November 2020 and August 2022. Social factors including substance use, occupation, marital status, income, and participation in physical exercise were included. In addition, aspects of discharge planning were reviewed such as living situation and transportation details. Results: Overall, 952 (32%) patients had successful SCDD, whereas 2021 (68%) patients were discharged on postoperative day 1 (POD1) or greater. Successful SCDD patients were more likely to have health care (4.8% vs 2.5%) and active (5.4% vs 4.6%) rather than sedentary occupations, be married (79.6% vs 67.4%), have access to transportation (95.6% vs 92.9%), live in a higher median income area ($64,044 [16,183] vs $61,572 [14,594]), and exercise weekly (62.6% vs 23.9%). Interestingly, the successful patients had more stories in their homes (1.62 [0.56] vs 1.43 [0.53]), more stairs to enter their homes (5.19 [5.22] vs 4.60 [5.24]), lived farther from the hospital (43.3 [138.0] vs 32.0 [75.9] miles), and a higher prevalence of alcohol use (60.7% vs 44.7%) and tobacco use (19.3% vs 17.3%). Conclusion: These findings may help arthroplasty surgeons to better understand the social factors that contribute to successful SCDD in TJA patients, ultimately aiding in patient selection and preoperative counseling.

Early Discharge for Revision Total Knee and Hip Arthroplasty: Predictors of Success.

BACKGROUND: The rate of revision total joint arthroplasties is expected to increase drastically in the near future. Given the recent pandemic, there has been a general push toward early discharge. This study aimed to assess for predictors of early postoperative discharge after revision total knee arthroplasty (rTKA) and revision total hip arthroplasty (rTHA). METHODS: There were 77 rTKA and 129 rTHA collected between January 1, 2019 and December 31, 2021. Demographic data, comorbidities, a comorbidity index, the modified frailty index (mFI-5), and surgical history were collected. The Common Procedural Terminology codes for each case were assessed. Patients were grouped into 2 cohorts, early discharge (length of stay [LOS] <24 hours) and late discharge (LOS >24 hours). RESULTS: In the rTHA cohort, age >65 years, a history of cardiac or liver disease, an mFI-5 of >1, a comorbidity index of >2.7, a surgical time >122 minutes, and the need for a transfusion were predictors of prolonged LOS. Only the presence of a surgical time of >63 minutes or an mFI-5 >1 increased patient LOS in the rTKA cohort. In both rTHA and rTKA patients, periprosthetic joint infection resulted in a late discharge for all patients, mean 4.8 and 7.1 days, respectively. Dual component revision was performed in 70.5% of rTHA. Only 27.6% of rTKA were 2-component revisions or placements of an antibiotic spacer. CONCLUSIONS: Several patient and surgical factors preclude early discharge candidacy. For rTHA, an mFI-5 of >2/5, comorbidity index of >4, or a surgical time of >122 minutes is predictive of prolonged LOS. For rTKA, an mFI-5 of >2/5, Charlson Comorbidity Index of >5, or a surgical time of >63 minutes predicts prolonged LOS.

Large Femoral Heads With Small Acetabular Components: An Examination of 10-Year Polyethylene Wear.

Highly cross-linked polyethylene (HXLPE) has improved polyethylene (PE) wear rates while decreasing osteolysis and aseptic loosening. However, concerns exist regarding the risk of mechanical failure with thin HXLPE liners in total hip arthroplasty (THA). Our purpose was to evaluate long-term outcomes and PE wear rates in primary THAs pairing large femoral heads with small acetabular components and thin HXLPE liners. We retrospectively reviewed 29 patients who underwent 33 primary THAs using large femoral heads (32 or 36 mm) with small acetabular components (48 or 50 mm) and thin HXLPE liners (3.9 or 5.9 mm) at minimum 10-year follow-up. PE liner wear was measured using a validated radiographic technique. Mean age was 66 years, 97% of the patients were women, and mean body mass index was 26.3 kg/m2. Thirty hips (90.9%) had ceramic femoral heads, and 13 hips (39%) had 36-mm femoral heads with 3.9-mm HXLPE liners. All cases used a neutral PE design. Mean linear wear rate and volumetric wear rate were 0.04 mm/year and 39.6 mm3/year, respectively, at mean 10.9-year follow-up. There were no instances of liner fracture, liner dissociation, or revision. Mean Hip disability and Osteoarthritis Outcome Score for Joint Replacement (HOOS, JR) was 92.1. In the largest long-term study of primary THAs using large femoral heads with small acetabular components and thin HXLPE liners, we found low linear and volumetric wear rates and no cases of liner mechanical failures. Thin HXLPE liners are a safe and viable option for THA surgeons. [Orthopedics. 2024;47(2):118-122.].

Primary Cementless Femoral Stems in Conversion Hip Arthroplasty After Failed Fixation of Intertrochanteric Fractures.

Salvage conversion hip arthroplasty is a viable solution to restore function and reduce pain after failed intertrochanteric hip fracture fixation. Our primary objective was to assess early outcomes achieved with primary cementless metaphyseal-engaging femoral stems for conversion hip arthroplasty compared with revision diaphyseal-engaging stems. This was a retrospective review of 70 patients with failed intertrochanteric hip fractures subsequently managed with conversion total hip arthroplasty or hemiarthroplasty. Thirty-five patients who underwent conversion using a primary cementless stem were compared with 35 patients who underwent conversion using a revision stem. The groups were similar regarding sex, body mass index, American Society of Anesthesiologists classification, preoperative diagnosis, and implants removed. Clinical and radiographic outcomes and complications were compared over a mean follow-up of 6 years. The primary stem cohort had a shorter mean hospital stay (3.03 vs 4.34 days, P=.028). There were no significant differences between the primary and revision cohorts regarding mean time to conversion (2.26 vs 1.75 years, P=.671), operative time (127 vs 131 minutes, P=.611), incidence of discharge to home (54.3% vs 37.1%, P=.23), postoperative complications (5.71% vs 5.71%, P=1.0), reoperations (5.71% vs 11.4%, P=.669), leg length discrepancy (5.33 vs 7.38 mm, P=.210), subsidence (20.0% vs 23.3%, P=.981), and Hip dysfunction and Osteoarthritis Outcome Score for Joint Replacement (78.6 vs 81.9, P=.723). We report comparable outcomes of conversion hip arthroplasty with the use of primary cementless and revision stems. Current primary cementless femoral stems may be considered for conversion hip arthroplasty for failed intertrochanteric fracture fixation. [Orthopedics. 2024;47(1):e6-e12.].

Does Automated Impaction Improve Femoral Component Sizing and Alignment in Total Hip Arthroplasty?

BACKGROUND: While automated impaction can provide a more standardized process for femoral canal preparation, little is known regarding its effect on femoral component sizing and position. The purpose of our study was to directly compare femoral component canal fill ratio (CFR) and coronal alignment between primary total hip arthroplasty (THA) procedures performed with automated impaction versus manual mallet impaction. METHODS: A retrospective analysis was performed on 184 patients who underwent primary THA by a single arthroplasty surgeon between 2017 and 2021 with a modern cementless femoral component using either the direct anterior or posterolateral approach. The final cohort was divided into 2 groups based on impaction technique during broaching: automated (N = 122) or manual (N = 62). A propensity score match was used to match for age, body mass index, sex, high versus standard offset stem, and preoperative femoral bone quality. Radiographic review was performed to measure intramedullary prosthetic CFR and coronal alignment. RESULTS: The automated cohort trended toward the use of a larger stem (5.67 versus 4.82, P = .006) and had a larger CFR at all 4 levels within the proximal femur (P = .004). The automated cohort had a more valgus and reliable coronal alignment (-0.57 (SD 1.50) versus -0.03 (SD 2.17) degrees, P = .03) and significantly shorter operative time (mean 78 versus 90 minutes, P < .001). There were no intraoperative or postoperative periprosthetic fractures in either cohort. CONCLUSION: Automated impaction in primary THA is a safe technique for femoral preparation, which resulted in improved stem coronal alignment, optimized canal fill within the proximal femur, and reduced operative times.

Incidental findings on CT scans for robot-assisted total joint arthroplasty.

INTRODUCTION: This study documented the incidence of incidental findings from preoperative computerized-tomography (CT) scans obtained for robotic-arm-assisted total joint arthroplasty (TJA) and its effect on patient management. METHODS: A retrospective review was conducted for patients who underwent robotic-arm assisted primary total hip arthroplasty (THA) or total knee arthroplasty (TKA) from 2016 to 2020. All patients obtained preoperative CT scans which were formally read by fellowship-trained musculoskeletal radiologists. CT's were flagged with incidental findings and those requiring physician follow-up were identified as significant. RESULTS: A total of 1519 patients (mean age, 66 years ±9; 849 females) were evaluated. Seventy-three (4.81%) patients had incidental CT scan findings, and 25 (1.65%) patients had significant incidental findings. Four patients required additional imaging and two patients required intervention. CONCLUSION: This study found a 4.81% incidence of incidental findings from preoperative CT scans for robotic-arm-assisted THA and TKA. Of these findings, less than 2% required physician follow-up and less than 1% required intervention. With the increasing popularity of robotic-arm assisted total joint arthroplasty, it is important to consider the necessity of detection and management of associated incidental findings from preoperative CT scans.

A Role for Outpatient Total Joint Arthroplasty During the COVID-19 Pandemic.

Outpatient total joint arthroplasty (TJA) gained favor during the COVID-19 pandemic. Our objective was to critically evaluate the safety and short-term outcomes of outpatient total hip arthroplasty (THA) and total knee arthroplasty (TKA) throughout the pandemic compared with pre-pandemic given their increased use. This was a retrospective review of 941 patients who underwent elective, outpatient TKA and THA at a single institution. Patients were divided into two cohorts: pre-pandemic (N=611) and pandemic (N=330). Data points included demographics, comorbidities, failure of same calendar day discharge (SCDD), and 90-day readmissions and re-operations. The pandemic cohort was older (61.0 vs 59.0 years; P=.001) and had a higher Charlson Comorbidity Index (2 vs 1; P=.004). There were no differences between the pandemic and pre-pandemic cohorts regarding SCDD failures (23.3% vs 21.9%; P=.623) and reoperations (4.2% vs 6.2%; P=.205). The pandemic cohort had a lower readmission rate (4.8% vs 8.2%; P=.056). Overall, patients who had failure of SCDD more commonly underwent TKA than THA (63.5% vs 36.5%; P<.001), were older (63.0 vs 58.5 years; P<.001), had a higher body mass index (30.8 vs 29.9 kg/m2; P=.006) and Charlson Comorbidity Index (2 vs 1; P<.001), had an American Society of Anesthesiologists class greater than 2 (51.2% vs 31.6%; P<.001), received physical therapy later postoperatively (4.15 vs 3.12 hours; P<.001), and had a history significant for myocardial infarction (P=.025), chronic kidney disease (P=.004), or diabetes (P=.003). This study supports broadening indications for outpatient TJA because we found a shift toward older patients with more comorbidities successfully undergoing the procedure. [Orthopedics. 2023;46(5):303-309.].

Does a Uni "Feel Better" than a Total Knee? Not Necessarily, When Using Modern Implant Designs.

Background: When comparing functional outcomes of patients with unicompartmental knee arthroplasty (UKA) versus total knee arthroplasty (TKA), studies often report the UKA as the preferred procedure; however, recent improvements in the design of modern TKA implants have aimed at narrowing this gap. Purpose: We sought to compare the "feel" of modern TKA implants to that of UKA, using the Forgotten Joint Score (FJS), a validated patient-reported outcome measure. Methods: We performed a retrospective review of patients who underwent TKA and UKA at 2 institutions between 2014 and 2017. All UKA procedures were robotic arm-assisted with a single implant, "traditional TKAs" were performed using traditional posterior-stabilized implants, and "modern TKAs" were performed using posterior-stabilized implants with a modern design. Differences in FJS were assessed using 1-way analysis of variance and independent 2-sample t tests. Results: A total of 600 patients were included in our study, with 200 patients in each surgical subcategory. Mean age was 62.8 ± 10.2 years and mean body mass index was 29.9 ± 4.9. Modern TKA and UKA had similar FJS at 1 year. While modern TKA had a significantly higher FJS than traditional TKA, UKA did not have a significantly higher FJS than traditional TKA. Conclusion: Our retrospective analysis found no significant differences in the FJS of patients who underwent UKA and TKA with a modern design; however, both had superior scores than traditional TKA designs. This finding suggests that modern TKA designs may have the potential to achieve the natural feeling that is typically associated with joint-conserving surgeries such as UKA, although longer follow-up is necessary.

Cost Disclosure of Surgeon "Scorecards": Effects on Operating Room Costs for Total Hip and Knee Arthroplasty.

Background: Rising health care costs, coupled with an emphasis on cost containment, continue to gain importance. Surgeon cost scorecards developed to track case-based expenditures can help surgeons compare themselves with their peers and identify areas of potential quality improvement. Purpose: We sought to investigate what effect surgeon scorecards had on operating room (OR) costs in orthopedic surgery. Methods: Our hospital distributed OR cost scorecards to 4 adult reconstruction fellowship-trained orthopedic surgeons beginning in 2012. The average direct per-case supply cost of procedures was calculated quarterly and collected over a 5-year period, and each surgeon's data were compared with that of their peers. All 4 surgeons were made aware of the costs of other surgeons at the 2-year mark. The initial 2 years of data was compared with that of the final 2 years. Results: The average direct per-case supply cost ranged from $4955 to $5271 for total knee arthroplasty (TKA) and $5469 to $5898 for total hip arthroplasty (THA) during the initial 2-year period. After implementing disclosures, the costs for TKA and THA, respectively, ranged from $4266 to $4515 (14% annual cost savings) and from $5073 to $5727 (5% annual cost savings); 3 of the 4 surgeons said that cost transparency altered their practice. Conclusion: Our comparison suggests that orthopedic surgeons' participation in a program of operative cost disclosure may be useful to them; we found a possible association with reduced per-case costs for TKA and THA at our institution over a 5-year period. More rigorous study that incorporates the effects of the scorecards on patient outcomes is warranted.

Predictors of Successful Early Discharge for Total Hip and Knee Arthroplasty in Octogenarians.

Background: Decreased length of stay after total joint arthroplasty (TJA) is becoming a more common way to contain healthcare costs and increase patient satisfaction. There is little evidence to support "early" discharge in elderly patients. Purpose: We sought to identify preoperative factors that correlated with early discharge (by postoperative day [POD] 1) in comparison to late discharge (after POD2) in octogenarians after TJA. Methods: In a retrospective cohort study from a single institution, we identified 482 patients ages 80 to 89 who underwent primary TJA from January 2014 to December 2017; 319 had total knee arthroplasty (TKA) and 163 had total hip arthroplasty (THA). Data collected included preoperative knee range of motion (ROM), demographics, and comorbidities; 90-day readmission and mortality rates were also evaluated. P values for continuous data were calculated using student's t test and for categorical data using χ2 testing. Results: Of octogenarian patients, 30.9% were discharged by POD1. Early discharge was associated with being male, married, and nonsmoking, as well as having an American Society of Anesthesiologists (ASA) score of 2, independent preoperative ambulation, and a postoperative caregiver. Type of procedure (TKA vs THA), body mass index, laterality, preoperative range of motion (ROM) for TKA, and single vs multilevel home did not affect the probability of early discharge. Discharge on POD1 was not associated with increased 90-day readmission rates. There were no deaths. Conclusion: Early discharge for octogenarians can be successfully implemented in a select subset of patients without increasing 90-day readmission or death rates. There are multiple factors that predict successful early discharge.

Gunshot Wound Resulting in Femoral Neck Fracture Treated With Staged Total Hip Arthroplasty.

A 39-year-old male presented with multiple gunshot wounds and resultant left comminuted femoral head and neck fractures with retained intraarticular bullet fragments. Successful staged reconstruction was performed with initial placement of an antibiotic spacer and subsequent conversion to total hip arthroplasty. Staged reconstruction with an antibiotic spacer and conversion to total hip arthroplasty is a viable treatment approach for a gunshot wound resulting in intraarticular bullet fragments and comminuted femoral head and neck fractures not amenable to open reduction and internal fixation to reduce the risk of periprosthetic joint infection.

Discrepancies in Work-Family Integration Between Female and Male Orthopaedic Surgeons.

BACKGROUND: Female surgeons, representing 6.5% of the American Academy of Orthopaedic Surgeons, are particularly vulnerable to work-family conflict. This conflict may deter women from considering orthopaedic surgery as a specialty. The study objective was to identify differences in work-family integration between female and male orthopaedic surgeons in the United States. METHODS: An anonymous survey collecting data within the domains of work, family, and satisfaction was completed by 347 orthopaedic surgeons (153 female, 194 male). Differences in responses between males and females were identified. RESULTS: Female surgeons were younger than males (mean, 41.1 versus 50.1 years; p < 0.001) and earlier in their careers, with 60.3% of males in practice >10 years compared with 26.1% of females (p < 0.001). Consulting (7.8% versus 31.4%; p < 0.001), course faculty positions (19.0% versus 39.2%; p < 0.001), and academic and leadership titles (30.7% versus 47.4%; p = 0.002) were significantly less common among females. There was a significant income disparity between females (mean yearly income, $300,000 to $400,000) and males (mean, $400,000 to $500,000; p < 0.001). Females were more likely to have never married (12.4% versus 2.6%; p < 0.001), or they married at a later mean age (30.2 ± 4.7 versus 28.3 ± 3.9 years; p < 0.001). Females were more likely to have no children (29.4% versus 7.8%; p < 0.001), require fertility treatment (32.0% versus 11.9%; p < 0.001), and not have children until after completing their medical training (63.0% versus 31.1%; p < 0.001). Female surgeons reported more responsibility in parenting (p < 0.001) and household duties (p < 0.001) than males. Work-family balance satisfaction was 72.3% in females and 82.1% in males (p = 0.081). CONCLUSIONS: This study highlights deficiencies in work-family integration that appear to uniquely impact female orthopaedic surgeons. Female surgeons delay starting a family, more frequently require fertility treatments, carry more responsibility at home, have fewer academic and leadership roles, earn lower incomes, and are less satisfied with work-family balance relative to males. The discrepancy in work-family integration must be addressed to attract, support, and retain women as successful orthopaedic surgeons.

A Role for Modern Primary Cementless Femoral Stems in Revision Hip Arthroplasty.

BACKGROUND: In revision total hip arthroplasty (THA) cases with preserved femoral metaphyseal bone, tapered proximally porous-coated "primary" femoral stems may be an option. The objective of this study was to compare outcomes of patients with Paprosky I or II femoral bone loss undergoing revision THA with either a primary metaphyseal-engaging cementless stem or a revision diaphyseal-engaging stem. METHODS: This was a retrospective analysis of 70 patients with Paprosky I or II femoral bone loss who underwent femoral revision. 35 patients who were revised using a primary cementless femoral stem were compared with 35 patients who underwent femoral revision using a revision diaphyseal-engaging stem. The groups were similar regarding age, gender, body mass index, and American Society of Anesthesiologists. Clinical and radiographic outcomes and complications were compared over an average follow-up of 2.9 years (SD 1.4). RESULTS: Revision THA was most commonly performed for periprosthetic joint infection (N = 27, 38.6%). The groups were similar with regards to Paprosky femoral classification (P = .56), length of stay (P = .68), discharge disposition (P = .461), operative time (P = .20), and complications (P = .164). There were no significant differences between primary and revision femoral stem subsidence (0.12 vs. 0.75 mm, P = .18), leg length discrepancy (2.3 vs. 4.05 mm, P = .37), and Hip Disability and Osteoarthritis Outcome Score Jr (73.1 [SD 21.1] vs. 62.8 [SD 21.7], P = .088). No patient underwent additional revision surgery involving the femoral component. CONCLUSION: Use of modern primary cementless femoral stems is a viable option for revision hip arthroplasty in the setting of preserved proximal femoral metaphyseal bone. Outcomes are not inferior to those of revision stems and offer potential benefits.

Incidence of COVID-19 After Nonelective Hip and Knee Surgery During the Peak of the Pandemic: The New Jersey Experience.

In an attempt to preserve essential equipment and health care system capacity and slow the spread of coronavirus disease 2019 (COVID-19) infection, Governor Murphy suspended all elective surgeries performed in New Jersey from March 27, 2020, through May 25, 2020. The objective of this study was to determine the incidence of postoperative COVID-19 infection following nonelective hip and knee surgery during the peak of the COVID-19 pandemic in New Jersey during this time. A retrospective cohort of 149 patients who underwent nonelective hip and knee surgery from March 27, 2020, through May 25, 2020, at 2 institutions was identified. The cohort was divided into hip fracture and non-fracture patients to compare the postoperative experience of these patient populations. The primary outcome was the incidence of postoperative COVID-19 infection diagnosed via severe acute respiratory syndrome coronavirus 2 nasopharyngeal real-time reverse transcription polymerase chain reaction. Secondary outcomes included length of stay, discharge disposition, postoperative complications, and mortality rate. A total of 149 patients underwent nonelective hip and knee surgeries, including 76 hip fracture cases and 73 nonelective hip and knee arthroplasty cases. A postoperative diagnosis of COVID-19 was made for 5 (6.6%) of 76 hip fracture patients, and 2 of the 5 died secondary to COVID-19. There were no infections in the arthroplasty cohort. This study describes a low incidence of COVID-19 infection after nonelective hip and knee surgery during the surge of the COVID-19 pandemic in New Jersey. Patients who underwent hip fracture surgery had an increased incidence of postoperative COVID-19 infection. [Orthopedics. 2021;44(3):180-186.].

Clinical evaluation of direct anterior approach total hip arthroplasty for severe developmental dysplasia of the hip.

It is challenging to treat developmental dysplasia of the hip (DDH) classified Crowe III-IV using direct anterior approach (DAA) total hip arthroplasty (THA), and very little is known on its outcome. This study aimed to investigate the clinical result in this defined disorder with DAA versus posterolateral approach. Twenty-three consecutive hips with Crowe III-IV DDH who underwent DAA were retrospectively evaluated from 2016 through 2018. Outcomes were primarily assessed by HHS, WOMAC, and SF-12 physical scales. The second evaluations included leg length discrepancy, hip muscle strength, radiographic review, complications, and limp recovery. Results were compared to a control cohort of 50 hips underwent posterolateral THA concurrently within the observational period. At last follow-up (DAA 28.5 months; PLA 39.0 months), the mean increase of the HHS for DAA was 48.2 and 30.3 for PLA (p = 0.003). The improvement in WOMAC score in DAA cohort was 15.89 higher that of the PLA cohort after adjusting preoperative difference [R2 = 0.532, P = 0.000, 95% CI (10.037, 21.735)]. DAA had more rapid recovery of hip abductor strength at 1-month (p = 0.03) and hip flexor strength at 3 months (p = 0.007) compared to PLA. No significant differences were found in the radiographic analysis with the exception of increased acetabular anteversion in the DAA cohort (p = 0.036). Satisfactory improvement in limp, indicated by the percentage of limp graded as none and mild to the total, was much higher in DAA cohort (97.6%), compared to that of PLA cohort (90.0%, p = 0.032). DAA for high-dislocated dysplasia demonstrate a significant improvement in clinical result comparable to posterolateral approach. Improved clinical outcome in terms of increased HHS and WOMAC scores, rapid recovery of hip abductor and flexor strength, and enhanced limp recovery without an increased risk in complications, could be acquired when the surgeons were specialized in this approach.

Survivorship, Clinical and Radiographic Outcomes of a Novel Cementless Metal-Backed Patella Design.

BACKGROUND: Enhanced implant longevity through biological fixation is achievable using cementless total knee arthroplasty but concerns about patellar component failure have lingered because of prior experiences with older component designs. A new metal-backed patella (MBP) design was released which features a 3-dimensional printed porous titanium metal backing to improve biologic fixation potential and a unique compression molding technique to create a stronger interlock layer between the polyethylene and metal backing. Our study purpose was to determine the clinical and radiographic outcomes and survivorship of this novel cementless MBP. METHODS: Our institutional registry identified 388 cementless MBP with minimum 2-year and 80 with minimum 5-year follow-up. Knee Injury and Osteoarthritis Outcome Score for Joint Replacement and 12-item Veterans RAND/Short Form Health Survey (VR/SF-12) scores were used to evaluate clinical outcomes. Aseptic loosening noted on radiographs as well as revision for any reason were the end points used to determine survivorship. RESULTS: Improvement in the preoperative Knee Injury and Osteoarthritis Outcome Score for Joint Replacement, VR/SF-12 physical health and mental health scores were all statistically significant at 2-year follow-up and the VR/SF-12 mental health score at 5-year follow-up. By radiologic criteria, biologic fixation of the patellar component was present in all except 1 case at 2 years (99.6%) and at 5 years (97.7%). Radiolucent lines were present in 15 cases (6.2%) at 2 years and in 6 cases (14%) at 5 years, but progressive increase in radiolucent lines was seen in only 4 cases. No component was revised for loosening; aseptic survivorship was 100%. CONCLUSION: This 3-dimensional printed cementless patellar component shows excellent survivorship at 2-year and 5-year follow-up. We are hopeful about the long-term durability of this implant.

Lateral Trochanteric Pain Following Primary Total Hip Arthroplasty: Incidence and Success of Nonoperative Treatment.

BACKGROUND: Our study aimed at quantifying the overall incidence of lateral trochanteric pain (LTP) following total hip arthroplasty (THA) and risk based on surgical approach. The success of conservative treatment and potential risk factors for failure of conservative treatment were evaluated. METHODS: This is a retrospective review of patients who underwent primary THA between 2010 and 2019 and had a postoperative diagnosis of ipsilateral LTP. Chart review revealed patient demographics/comorbidities, preoperative diagnosis, surgical approach, femoral components, and nonoperative treatment modalities. Radiographic analysis was performed to measure leg length discrepancy, femoral offset, and femoral head lateralization. RESULTS: The incidence of LTP following primary THA was 1.70% (573/33,761) with an average time to diagnosis of 27.3 months. The direct anterior approach demonstrated the highest risk and the direct lateral demonstrated the lowest risk for LTP (P < .001). Also, 82.4% (472/573) were diagnosed greater than 6 months postoperatively (P < .001). Of 573 patients, 95 (16.6%) were treated with physical therapy, home exercises, or oral medications with a success rate of 96.8% (92/95). Remaining 478 (83.4%) were treated with corticosteroid injection (CSI). And 89.5% (428/478) of the CSI cohort demonstrated clinical improvement with 3 or less CSIs. Risk factors for failure of conservative treatment were depression (P = .034), kidney disease (P = .040), and osteoporosis (P = .007). CONCLUSION: Postoperative LTP after THA is rare with an incidence of 1.70%. The direct anterior approach presented higher risk of LTP. Non-CSI modalities and CSIs were both successful treatment options. In patients with depression, kidney disease, and osteoporosis, conservative treatment may be less efficacious.

Direct anterior approach total hip arthroplasty for Crowe III and IV dysplasia.

High-dislocated hip dysplasia is challenging to treat with total hip arthroplasty via the direct anterior approach (DAA). The DAA has potential advantages including optimizing component positioning, enhanced hip stability, and a more rapid postoperative recovery. We present a surgical technique for DAA total hip arthroplasty for hip dysplasia that includes preoperative planning, soft tissue releases, subtrochanteric osteotomy, component placement, and intraoperative nerve monitoring and imaging. This technique provides detailed technical instructions, specifically including pearls and pitfalls, and complication prevention strategies.