SETH ALLEN JERABEK, M.D.

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This study compared two surgical methods for hip replacement: the Superior Transverse Anatomic Reconstruction (STAR) approach and the traditional posterior approach. The researchers found that patients who had the STAR approach experienced less blood loss, shorter surgery times, and used fewer opioids right after surgery; for example, they used an average of 65 morphine milligram equivalents compared to 107 for the traditional method. This matters because quicker recovery and less pain can lead to a better overall experience for patients after hip surgery. Who this helps: Patients undergoing total hip arthroplasty.

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This study looked at how robotic assistance in total hip replacement surgery (RA-THA) affects the time it takes to perform the operation, compared to traditional manual methods (M-THA). Researchers found that both methods took about the same time overall—76 minutes for robotic surgery and 77 minutes for manual surgery—showing no significant difference. However, using robotics sped up one particular step, acetabular reaming, which took only 2.3 minutes compared to 6.8 minutes for the manual method. Who this helps: This benefits patients undergoing hip replacement surgery, as it means they can receive effective care without longer surgery times.

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This study looked at how a deep-learning program can quickly measure certain features of thigh bones to help predict the risk of fractures after hip replacement surgery. The researchers found that the algorithm was able to automate the measurement process and identified specific bone characteristics that were higher in patients who experienced early fractures compared to those who didn’t, with notable differences in canal calcar and canal bone ratios. These findings are important because they can help doctors better assess fracture risk and tailor surgical approaches to improve patient outcomes. Who this helps: This helps patients undergoing hip replacement surgery.

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This study looked at how the angle between the mechanical and anatomical axes of the femur affects total knee replacements. The researchers found that, on average, the angle was 6.3 degrees for one measurement method and 4.6 degrees for another, with about 25% of patients having angles outside the standard 5 degrees. This is important because it shows that many patients have unique anatomical features that surgeons need to consider to ensure proper alignment during knee surgery. Who this helps: Patients undergoing knee surgery.

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This study looked at how using a new type of hip replacement component, called a collared femoral component, affects the rates of periprosthetic femoral fractures (PPF), a serious complication that can occur after hip surgery. Out of nearly 1,900 surgeries, fractures happened in 1.42% of patients with the older collarless components, compared to only 0.13% with the new collared design, showing a significant reduction in fracture rates (p = 0.002). This is important because fewer fractures mean less pain and a lower likelihood of needing additional surgeries, leading to better outcomes for patients. Who this helps: Patients undergoing total hip arthroplasty.

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This study compared two techniques used during robot-assisted knee replacement surgery—kinematic alignment (KA) and mechanical alignment (MA)—to see if they resulted in different limb alignments after surgery. Researchers looked at 234 patients and found that the KA group had a mean hip-knee-ankle angle (aHKA) of -1.4 degrees while the MA group had -0.5 degrees, showing no significant differences in how close each method got to neutral alignment (91.7% for KA vs. 96.6% for MA). This is important because it means surgeons can feel confident using KA, as it reliably keeps the knee alignment very close to neutral, with 97% of patients achieving this within 5 degrees. Who this helps: This benefits both patients and surgeons by improving surgical outcomes without restricting techniques.

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This study looked at how changing surgical planning and techniques affected the risk of hip dislocation in patients who have both hip and spinal issues. Researchers analyzed data from 281 patients over nearly a decade and found that the dislocation rate dropped from 6.8% to 1.5% after new methods were implemented. This is important because it shows that improved planning and technology can make surgeries safer for high-risk patients. Who this helps: This benefits patients undergoing hip replacements who also have spinal deformities.

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This study focused on testing a new advanced knee simulator model designed to help surgeons practice ligament balancing for total knee replacements. The model showed consistent results when compared to human cadaver knees, with the most variation (1.25 mm for the simulator and 0.67 mm for cadavers during initial assessments) still indicating that the simulator can effectively mimic real human knee conditions. This matters because it provides a more accessible and reliable training tool for new surgeons, improving their skills in a critical part of the surgery. Who this helps: This helps newly trained surgeons and, ultimately, their patients needing knee replacement surgery.

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This study looked at how using robotic assistance during hip replacement surgery affects the positioning of implants. Researchers found that in 105 patients, the initial surgical plan for implant position was changed in 78% of cases after using new software that considers each patient's unique body movements. This is important because it shows that the technology can lead to better-tailored surgeries, potentially improving patient outcomes. Who this helps: Patients undergoing hip replacement surgery.

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This study looked at how a new technology, called a deep learning algorithm, can help measure angles in hip X-rays to identify mild hip dysplasia in nearly 3,900 patients. The researchers found that between 2.5% and 20% of patients showed signs of hip dysplasia, with 12.4% having angles that suggest a higher risk of needing hip replacement surgery. Understanding the prevalence of this condition can lead to earlier diagnosis and better management of hip health. Who this helps: Patients at risk for hip problems.

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Researchers held a meeting to address the challenges of treating severe bone loss in patients who need a revision knee surgery after their initial knee replacement. They brought together 42 experts who discussed how to assess bone loss, ensure implant stability, manage knee cap issues, and use advanced surgical systems. The findings aim to improve patient outcomes by providing better guidelines for doctors in this complex area of joint surgery. Who this helps: This helps patients undergoing revision knee surgery and the doctors assisting them.

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This study looked at how patients recover week by week after having total hip replacement surgery using a specific technique called the posterior approach. Out of 312 patients, by six weeks after surgery, 57% had returned to work, 77% were driving, and those who used pain medication dropped from 25% of patients at six weeks compared to everyone needing help right after surgery. Understanding this recovery timeline is important because it helps doctors set clear expectations for their patients about what to expect as they heal. Who this helps: This helps patients by providing them with a clearer picture of their recovery journey.

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This study looked at how the alignment and length of bones in the legs relate to the pain experienced by people with knee osteoarthritis. Researchers found that knees causing pain most days were more misaligned compared to pain-free knees. Specifically, those with more severe knee deformities and limb-length differences reported more frequent pain, hinting that worsening knee conditions lead to increased discomfort. Who this helps: This research benefits patients suffering from knee osteoarthritis by improving understanding of how their symptoms relate to physical changes in the knee.

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This study looked at how deep learning technology can help categorize different types of knee alignments in nearly 2,000 patients before they undergo knee surgery. The researchers found that women had a greater tendency for a specific knee alignment (valgus) compared to men, and patients with more severe arthritis had a different alignment pattern (varus) than those with milder arthritis. This information is important for better planning of knee surgeries tailored to individual patients based on their specific knee alignments. Who this helps: This helps patients and doctors by providing more accurate preoperative assessments for knee surgery.

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This study looked at how different methods of measuring leg-length discrepancy (LLD) from pelvic X-rays can lead to varying results. Researchers used deep learning technology to automatically measure LLD based on specific anatomical points in 3,689 patients. They discovered that no measurement method produced highly consistent results, with the best methods only showing moderate agreement, which highlights the importance of having standardized measurements for accurate diagnosis and treatment. Who this helps: This helps doctors in making more accurate assessments for patients needing hip surgeries.

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This study focused on creating a machine learning model to predict the risk of patients needing hip replacement surgery (total hip arthroplasty or THA) within ten years. After analyzing data from 4,796 patients, the best version of the model combined various patient information and specialized imaging measurements. It achieved a prediction accuracy score of 0.81, meaning it can reliably identify patients likely to need surgery, which can help in early intervention and planning. Who this helps: This benefits patients and doctors by aiding in better decision-making regarding hip health and potential surgeries.

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This study looked at complications following total hip replacement surgery using the posterior approach and advanced technology in nearly 2,900 patients. They found that only 10 patients (0.35%) dislocated their hip after surgery, which is one of the lowest dislocation rates reported for this method, and overall, 39 patients (1.3%) had complications that required readmission. These results show that the posterior approach with modern technology is both safe and effective for hip replacements, minimizing serious risks. Who this helps: This helps patients undergoing hip replacement surgery and the doctors who perform these procedures.

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This study compared two types of knee surgeries: one using cement and the other without it, focusing on pain levels, opioid use, and recovery outcomes. Researchers looked at 1,302 patients, with 186 receiving cementless implants and 1,116 getting cemented ones. They found no significant differences in pain scores or how much opioids patients used after surgery, and recovery outcomes were similar for both groups. Who this helps: This benefits patients undergoing knee surgery, as it confirms that both methods provide similar pain management and recovery results.

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This study looked at how accurately different technologies—an imageless handheld navigation system and a robotic surgical system—can perform total knee replacements. It found that the robotic system had slightly better precision for one type of measurement by about 0.4 degrees, but overall, both methods showed high accuracy in placing knee components. This matters because it helps doctors choose the best technology for performing knee surgeries, ensuring better outcomes for patients. Who this helps: Patients receiving knee replacements.

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This study looked at whether using elevated liners during hip replacement surgery could help reduce the chances of patients needing follow-up surgeries due to complications like hip dislocation. Out of over 26,500 patients, only 1.3% needed surgery again because of hip dislocation, and the study found that using elevated liners lowered this risk compared to standard liners. The findings are important because they show that elevated liners can potentially make hip replacement surgery safer by reducing the chances of problems that require more surgery. Who this helps: This helps patients undergoing hip replacement surgery and their surgeons.

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This study looked at how the movement of the pelvis while walking affects the positioning of the hip joint replacement (called the cup) in people who have had total hip arthroplasty (THA). Researchers found that, before surgery, more than half of the patients had significant motion in their pelvis, which changed the angle of the cup after surgery. Specifically, the cup's position was altered by about 1.9 degrees for the angle it faces upwards and up to 15.1 degrees for how far it tilts forward after surgery, meaning that surgeons need to consider this pelvic movement when planning the surgery. Who this helps: This information benefits orthopedic surgeons and their patients undergoing hip replacement surgery.

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This paper reviews how doctors have worked to prevent dislocations after total hip replacement surgeries over the years. They found that advancements like using custom implants and robotic technology have improved success rates, reducing dislocation rates in some cases. Improving these strategies is important for helping patients recover better and avoid complications after surgery. Who this helps: This helps patients undergoing total hip replacements.

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This study compared two methods of aligning the knee during total knee replacement surgery: mechanical alignment and kinematic alignment. Researchers looked at the outcomes of 200 patients and found that those who had kinematic alignment reported less pain in the first six weeks after surgery, and they also felt their knees were more natural over the long term—measured by a high "Forgotten Joint Score" at one and two years. This finding matters because it suggests that kinematic alignment may lead to greater patient satisfaction after knee surgery. Who this helps: This helps patients undergoing knee replacement surgery.

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This study looked at how well wearable sensors can measure pelvic tilt in patients before they undergo hip replacement surgery. Researchers found that the sensors closely matched traditional X-ray measurements, with a very high accuracy rate (over 95% correlation), indicating that they reliably track pelvic movement. This is important because it could help doctors better understand and plan surgeries based on precise measurements of patients' body positions. Who this helps: This benefits patients preparing for hip replacement surgery and their doctors.

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This study looked at different methods for total hip replacement surgery, specifically comparing robotic assistance, computer navigation, and traditional manual techniques. The researchers found that patients who had robotic-assisted surgeries had a 70% lower chance of needing a second surgery because of dislocation within one year compared to those who had the manual approach (an odds ratio of 0.3). This is important because fewer follow-up surgeries mean less time, money, and stress for patients. Who this helps: Patients undergoing total hip replacement surgery.

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This study looked at how measuring the angle of the tibia (shinbone) affects total knee replacements. Researchers compared two methods of determining this angle: the traditional method, which gave a steeper angle, and a newer method based on a line connecting the ankle and knee, which resulted in an average angle that was 1.9 degrees less. This difference is significant because it can impact how the knee moves and bears weight after surgery. Who this helps: This benefits patients undergoing knee replacement surgeries by potentially improving their recovery and function.

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This study looked at how different placements of hip replacement components affect the range of motion and risk of joint impingement, which can cause pain and limit movement. Researchers analyzed the data from 16 hip replacement patients and found that adjusting the position of the acetabular liner increased the range of motion by an average of 9 degrees during specific movements, helping to reduce the risk of impingement. Overall, the study shows that properly adjusting the offsets of hip implant components is crucial for improving patient outcomes after surgery. Who this helps: Patients undergoing total hip arthroplasty.

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This study developed a new tool that uses advanced computer technology, called deep learning, to quickly and accurately determine the center of the hip joint from standard pelvic X-rays. Out of 3,965 patients' X-rays analyzed, the tool made its predictions in just 0.65 seconds per hip and got the center correct within 5 mm for 80% of cases, improving accuracy to 91% when using specific measurements tailored to each patient. This is important because accurate determination of the hip joint center can lead to better surgical planning and outcomes for patients needing hip replacements. Who this helps: Patients undergoing hip replacement surgery.

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This study looked at whether low back pain (LBP) improves after patients have total hip replacement surgery. Researchers analyzed data from 500 patients and found that 82% of those with back pain saw it resolve within a year after surgery. A specific measurement, the change in the sacral slope when going from standing to sitting, helped predict who would benefit from the surgery. Who this helps: This research benefits patients considering hip surgery, as it provides insight into potential relief from back pain.

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This study looked at whether using computer navigation during hip replacement surgery could lower the chance of patients dislocating their new hip joint. Researchers reviewed 72 patients and found that none of them (0%) experienced dislocations after their surgery, compared to a 31% dislocation rate seen in other patients who underwent traditional hip replacements. This is important because avoiding dislocations means fewer complications and better outcomes for patients. Who this helps: This helps patients undergoing revision hip surgery.

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This study looked at whether the surgical approach used for hip replacement surgery affected how quickly patients could go home after the procedure. Researchers found that both the direct anterior approach and the posterior approach led to similar discharge times (about 5.9 hours for the anterior and 6.0 hours for the posterior). The surgery took less time with the anterior approach (78 minutes compared to 86 minutes), but overall, the type of approach didn’t significantly impact recovery or discharge outcomes. Who this helps: This benefits patients undergoing outpatient hip replacement surgeries, as they can expect similar recovery times regardless of the surgical method used.

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This study looked at how to improve the accuracy of measuring knee alignment during knee surgery by using artificial intelligence (AI) to analyze radiographs, or X-ray images, of patients' legs. Researchers found that when using specific anatomical landmarks, such as points on the ankle, the measurements could be off by as much as 5.2 mm, which can lead to incorrect knee alignment during surgery. By pinpointing an ideal measurement location, they were able to achieve accurate alignment measurements similar to established methods, which is crucial for successful knee replacement outcomes. Who this helps: This helps patients undergoing knee surgery, ensuring better surgical outcomes.

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This study examined how spinopelvic hypermobility, a condition that affects the movement between the spine and pelvis, changes in patients with hip osteoarthritis after undergoing two hip replacement surgeries. Researchers found that after the first surgery, only 29% of the patients saw improvement, but this number rose to 98% one year after the second surgery. Understanding this progression is important for planning surgeries, as many patients may need both hips replaced before experiencing full relief from hypermobility. Who this helps: This research benefits patients with hip osteoarthritis and their doctors by informing treatment and surgery strategies.

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This study compared two surgical methods—anterior and posterior approaches—for placing the acetabular component during robot-assisted total hip replacement surgery. Researchers found that while the posterior approach had slightly lower accuracy in the component's position (4.3 degrees versus 3.1 degrees for the anterior), the overall precision was not significantly different, and relevant outliers were more common in the posterior group (12 compared to 3). These findings indicate that both methods are effective, but the anterior approach may offer a small advantage in accuracy and fewer positioning errors. Who this helps: This benefits doctors and patients undergoing hip replacement surgery.

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This study compared two imaging methods—3D biplanar radiography (hipEOS) and CT scans—for measuring the angle of the femur (thigh bone) in patients who had hip replacement surgery. The research involved 45 patients and found that both methods provided very similar results, with no significant difference in measurements (average difference was just -0.09 degrees). This is important because hipEOS exposes patients to less radiation and takes less time than CT scans, making it a safer and more efficient option for assessing femoral placement after surgery. Who this helps: This helps patients undergoing hip replacement surgery and their doctors.

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This study looked at how to properly position the femoral component during total knee replacement surgery to ensure better balance and function of the knee. The researchers found that if surgeons set the femoral component 3 degrees outward from a specific anatomical reference (the posterior condylar axis), it would only align correctly with the normal anatomy in about half of the cases, and in nearly a quarter of the surgeries, the component would be misaligned in the opposite direction. This matters because misalignment can affect the success of the surgery and the patient's recovery and knee function. Who this helps: This helps patients undergoing total knee replacement surgery.

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This study looked at how new imaging techniques can improve planning for total hip replacement surgeries. Researchers found that using advanced 3D imaging helps doctors select the right implants and position them better, which can reduce complications like leg length differences and dislocations, ultimately leading to higher patient satisfaction. By carefully planning beforehand, hospitals can provide more efficient and effective care. Who this helps: Patients undergoing hip replacement surgery.

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This study looked at a new type of porous cone used during knee replacement surgeries in patients needing revisions. Out of 163 patients, there were no cases of failure due to loosening of the cone after 2 years, with overall reoperation rates at 14%. This is significant because it shows that this new design is very effective in maintaining stability in knee replacements, which can lead to better long-term outcomes for patients. Who this helps: This benefits patients undergoing revision knee surgeries.

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This study looked at how different recovery precautions after hip replacement surgery affect patients' early recovery. Researchers found that with modified movement guidelines, 74% of patients were able to return to work and 76% could start driving within just four weeks. Patients also showed a steady increase in their daily steps, which rose from 1,098 steps in the first week to over 6,000 by the sixth week, and more activity was linked to better recovery scores. Who this helps: This benefits patients recovering from hip surgery and their doctors, as it provides clearer expectations for recovery.

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This study looked at how telemedicine was used for follow-up visits after joint surgery during the COVID-19 pandemic in New York City. Out of 164 patients surveyed, over half (51%) reported saving money compared to in-person visits, and many felt less anxious about traveling (50%) and appreciated being in their own home during the appointment. However, some patients were concerned about not having a physical exam and felt less connected to their doctors. Who this helps: This benefits patients recovering from joint surgery who need follow-up care.

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This study looked at how a new Hip-Spine Classification system could help reduce the risk of dislocation after total hip replacement surgery in patients with spinal issues. Researchers followed 2,081 patients and found that using this classification led to a very low dislocation rate of just 0.8% after five years. This is important because it helps doctors better plan surgeries for patients with spinal problems, lowering the chances of complications. Who this helps: This benefits patients with spinal issues undergoing hip replacement surgery.

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This study focused on a new type of knee surgery called robotic-assisted total knee arthroplasty (rTKA), which is designed to improve accuracy and patient satisfaction. Researchers looked at 105 patients who had this surgery, finding that the alignment of the knee parts was very close to what surgeons planned, with deviations of less than 1 degree for most measurements. Additionally, patients reported significant improvements in their knee function and pain levels over two years, with scores indicating better mobility and less discomfort. Who this helps: This helps patients undergoing knee replacement surgery by improving their recovery experience and outcomes.

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This study looked at how spinopelvic hypermobility, a condition affecting the lower spine and pelvis, changes after total hip replacement surgery (THA). Researchers found that 95% of the patients who had hypermobility before the surgery no longer had it one year later. This is important because it shows that the surgery can lead to significant improvements in spinal stability, which could change how doctors plan procedures for patients with this condition. Who this helps: Patients undergoing total hip replacement surgery.

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This study looked at the safety and effectiveness of a specific hip replacement technique called dual-mobility constructs in patients who had previous spinal surgery. Out of 80 patients, none experienced dislocated hips after the surgery, and most showed significant improvements in their quality of life scores—going from an average of 50 to 87 out of 100. This matters because it suggests that patients with complex spinal issues can have stable and successful hip replacements, reducing their risk of complications. Who this helps: Patients with prior spinal fusions needing hip replacements.

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This study looked at how robotic assistance can improve total hip replacement surgeries for people with developmental hip dysplasia. Researchers reviewed data from 79 patients and found that after the surgery, their hip function scores improved significantly from 29 to 86, hip movement increased from 66° to 91°, and they corrected leg length differences from an average of 17.1 mm to 4 mm, with no complications reported. This is important because it shows that using robotic assistance can lead to better surgical results for these patients. Who this helps: This helps patients with developmental hip dysplasia who need hip replacement surgery.

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This study looked at how often medical articles correctly reference the "safe zone" for placing hip implants, a guideline established in 1978 by researcher Lewinnek. Out of 147 articles reviewed, only 11% accurately cited Lewinnek's definition, and many used inconsistent positioning methods that could affect implant stability. This inconsistency is important because it could lead to higher risks of implant failure or dislocation. Who this helps: This helps patients undergoing hip replacement surgery and the doctors performing the procedures.

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This study looked at how advanced imaging and 3D modeling can help plan surgeries for patients who have repeated hip dislocations after hip replacement surgery. Researchers assessed eight patients and found that, after using specialized models to identify issues that limited hip movement, none of them experienced dislocation again after surgery. This matters because it shows that targeted surgical plans can effectively address specific problems causing instability, leading to better recovery for patients. Who this helps: This benefits patients with unstable hip replacements and their surgeons.