Article
Orthopedics
Jean-Yves Jenny, Florent Baldairon
Summary: The purpose of this study was to analyze and quantify the changes in native coronal alignment of TKA patients according to different alignment goals. The study found that, except for the kinematic alignment technique, the various alignment techniques induced significant changes in the pre-arthritic anatomy of the TKA patients. Surgeons should be aware of these modifications when performing TKA surgery.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2023)
Article
Medicine, General & Internal
Constantin Dlaska, Petros Ismailidis, Kenji Doma, Benjamin Brandon, Matthew Wilkinson, Kaushik Hazratwala
Summary: This study describes a technique for femoral component rotation in total knee arthroplasty using a tibia-first, gap-balancing, functional alignment approach. The results show that this technique allows for appropriate femoral rotation without resulting in patellar maltracking.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Biotechnology & Applied Microbiology
Chaohua Fang, Yichao Luan, Zhiwei Wang, Long Shao, Tiebing Qu, Cheng-Kung Cheng
Summary: The study shows that 5 degrees external rotation of the tibial component has the closest kinematics to the intact knee after TKA, and moderate external rotation can improve knee kinematics post TKA.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Orthopedics
Ittai Shichman, Erel Ben-Ari, Ethan Sissman, Christian Oakley, Ran Schwarzkopf
Summary: This study aimed to evaluate postoperative changes in the coronal alignment of the ankle joint in patients undergoing total knee arthroplasty (TKA) for different degrees of knee deformity. The study found that there were significant changes in ankle alignment in the group with a valgus correction of 10 degrees or more. However, regardless of the degree of knee deformity correction, TKA did not result in significant changes in the tibiotalar tilt angle. These findings have important implications for assessing candidates for TKA and considering potential causes of postoperative ankle pain.
JOURNAL OF ARTHROPLASTY
(2022)
Article
Orthopedics
Qianjin Wang, Xiaofeng Zhang, Tianshu Shi, Zhengyuan Bao, Bin Wang, Yao Yao, Dengxian Wu, Zheng Liu, Honggang Cai, Dongyang Chen, Jin Dai, Qing Jiang, Zhihong Xu
Summary: This retrospective study compared the accuracy of postoperative limb alignment using two femoral alignment techniques in patients with severe coronal femoral bowing. The study found that the IM femoral cutting system is imprecise for the coronal alignment in severe lateral bowing of the femur, while the EM cutting system can achieve accurate alignment.
JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH
(2022)
Article
Health Care Sciences & Services
Matteo Innocenti, Luigi Zanna, Mustafa Akkaya, Kim Huber, Bernhard Christen, Tilman Calliess
Summary: Accurate positioning of prosthetic components is crucial for successful medial unicompartmental knee arthroplasty (mUKA). This study evaluated the use of femoral CT-based landmarks for setting tibial rotation in image-based robotic-assisted mUKA and found that it reliably achieved congruent knee kinematics with minimal deviations. The mean tibia component rotation relative to the femoral landmark was +0.24 degrees.
JOURNAL OF PERSONALIZED MEDICINE
(2023)
Article
Orthopedics
Ji Hoon Bae, Ja-Woon Lee, Soo-Hyun Kim, Sang-Gyun Kim, Young-Sik Jeon, Jeong Seok Choi
Summary: The study aimed to investigate the effects of the tibiofemoral synchronization technique on tibial torsion and lower limb rotation after primary total knee arthroplasty. The results showed that this technique had minimal impact on tibial torsion but resulted in changes in femoral anteversion and femoral neck-malleolar angle.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
Yong Zhi Khow, Ming Han Lincoln Liow, Merrill Lee, Jerry Yongqiang Chen, Ngai Nung Lo, Seng Jin Yeo
Summary: This study investigated the clinical effects of femoral component coronal alignment in unicompartmental knee arthroplasty over a 10-year follow-up period. The results showed that an increase in femoral component coronal angle was associated with poorer long-term clinical outcomes, while not affecting short-term outcomes or 10-year survivorship. Patients with larger femoral component coronal angles had worse clinical outcomes at the 10-year follow-up.
JOURNAL OF ARTHROPLASTY
(2021)
Article
Medicine, General & Internal
Jun Young Park, Hyuck Min Kwon, Byung Woo Cho, Woo-Suk Lee, Ick Hwan Yang, Kwan Kyu Park
Summary: The study compared the accuracy of 2D-CT methods and 3D reconstruction in measuring rotational alignment of the femoral component during total knee arthroplasty. It was found that there was no significant difference in the values measured using different methods on 2D-CT compared to those obtained from the 3D model, but the values measured on 2D-CT were approximately 1 degree smaller than the 3D values.
YONSEI MEDICAL JOURNAL
(2021)
Article
Orthopedics
Le-Shu Zhang, Jin-Cheng Zhang, Hang Zhou, Qiang Zhang, Xiang-Yang Chen, Shuo Feng
Summary: This study investigated the effects of different landmarks on tibial rotational alignment and the influence of gender differences. Results showed significant differences between male and female patients, with Akagi line for females and MSPT for males yielding the least deviation.
JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Sheng Pan, Chaoran Huang, Xingchen Zhang, Ruxin Ruan, Ziwen Yan, Zheng Li, Yong Pang, Kaijin Guo, Xin Zheng
Summary: The study demonstrates that the femorotibial angle can be used to evaluate lower limb alignment on limited non-weight-bearing short knee radiographs. For varus knees, measurements on NWB SKRs showed the best correlation with the hip-knee-ankle angle, while for neutral and valgus knees, NWB SKR measurements were insufficient for reliable calculation and quantification of coronal alignment of the lower limb.
QUANTITATIVE IMAGING IN MEDICINE AND SURGERY
(2022)
Review
Orthopedics
F. Matassi, F. Pettinari, F. Frascona, M. Innocenti, R. Civinini
Summary: Total knee arthroplasty (TKA) alignment is a popular topic in the orthopedics arthroplasty literature. Particularly, coronal plane alignment has gained attention as it is crucial for better clinical outcomes. Different alignment techniques have been described, but there is no consensus on the optimal alignment method. This narrative review aims to describe the different types of coronal alignments in TKA, accurately defining the principles and terms.
JOURNAL OF ORTHOPAEDICS AND TRAUMATOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Jaehun Ro, Du Hyun Ro, Yeokyung Kang, Hyuk-Soo Han, Choongsoo S. Shin
Summary: The study developed and validated a musculoskeletal model of cruciate-retaining total knee arthroplasty, investigating the effects of varus/valgus alignment adjustment and unbalanced medial/lateral ligament laxity during gait. Results indicated that 2 degrees of valgus alignment adjustment or varus alignment with balanced ligament models did not increase contact force or ligament tension.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Medicine, General & Internal
Meagan E. Tibbo, Afton K. Limberg, Kevin I. Perry, Mark W. Pagnano, Michael J. Stuart, Arlen D. Hanssen, Matthew P. Abdel
Summary: Post-operative mechanical axis alignment within 3 degrees of neutral was not associated with improved implant durability, clinical outcomes, or radiographic results at 10 years following primary TKA in a single fixed-bearing TKA design.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Medicine, General & Internal
Kuei-Lin Yeh, Tai-Yin Wu, Chiou-Shann Fuh, Chu-Song Chen, Sheng-Mou Hou, Chen-Hao Chiang, Chen-Kun Liaw
Summary: This study quantified the potential pelvic rotation in the coronal plane on postoperative plain radiographs and found that it cannot be neglected as it can affect the measurement of cup anteversion.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Orthopedics
Sunho Ko, Changwung Jo, Chong Bum Chang, Yong Seuk Lee, Young-Wan Moon, Jae woo Youm, Hyuk-Soo Han, Myung Chul Lee, Hajeong Lee, Du Hyun Ro
Summary: A web-based prediction model for postoperative AKI after TKA was developed in this study, incorporating six preoperative predictors. The model is simple and has demonstrated good predictive performance, leading to improved prognoses for TKA patients.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
Yun Seong Choi, Jong Byung Oh, Moon Jong Chang, Tae Woo Kim, Kee Soo Kang, Seung-Baik Kang
Summary: This study aims to determine the proportion of patients with delayed normalization of CRP and ESR after TKA, identify predictive thresholds for prolonged elevation, and compare clinical outcomes between patients with and without prolonged elevation. The records of 211 unilateral and 320 bilateral TKA were reviewed. CRP and ESR levels were compared at different time points, and thresholds for elevation were identified. No significant difference in clinical outcomes was observed between both groups.
JOURNAL OF ORTHOPAEDIC SCIENCE
(2023)
Article
Orthopedics
Hyung Jun Park, Moon Jong Chang, Eunah Hong, Tae Woo Kim, Chong Bum Chang, Tae Soo Bae, Dai-Soon Kwak, Seung-Baik Kang
Summary: The effect of medial meniscus posterior root (MMPR) repair during opening-wedge high tibial osteotomy (OWHTO) in terms of contact pressure (CP) and contact area (CA) was investigated using human cadaveric knee specimens. Repairing the torn MMPR decreased CP and increased CA, regardless of whether OWHTO was performed. The biomechanical advantage of repairing torn MMPR is maintained, irrespective of the degree of correction during OWHTO.
ARTHROSCOPY-THE JOURNAL OF ARTHROSCOPIC AND RELATED SURGERY
(2023)
Article
Orthopedics
Yun Seong Choi, Moon Jong Chang, Young Bin Shin, Tae Woo Kim, Chong Bum Chang, Seung-Baik Kang
Summary: This study investigated the relationship between preoperative patient-reported outcome measures (PROMs) and satisfaction after total knee arthroplasty (TKA), as well as the relationship between the amount of improvement in PROM or final PROM and satisfaction after 1 and 2 years of TKA. The analysis of the Western Ontario and McMaster University Osteoarthritis Index (WOMAC) and satisfaction of 267 limbs revealed that a higher improvement in WOMAC total score and better final WOMAC total scores were associated with greater satisfaction. While there was no significant difference in evaluating satisfaction between the amount of improvement in WOMAC and final WOMAC at 1 year after TKA, the final WOMAC function and total score were more related to satisfaction than the improvement in WOMAC function and total score at 2 years after TKA.
JOURNAL OF KNEE SURGERY
(2023)
Article
Medicine, General & Internal
Yun Seong Choi, Jung -Wee Park, Tae Woo Kim, Kee Soo Kang, Young-Kyun Lee, Kyung-Hoi Koo, Chong Bum Chang
Summary: This study aimed to assess the effect of total hip arthroplasty (THA) on coronal limb alignment, determine factors related to HKA changes, and examine the impact on knee joint space width. The study found that a significant reduction in NSA could lead to pronounced varus alignment after THA, which had negative effects on the medial compartment of the ipsilateral knee.
JOURNAL OF KOREAN MEDICAL SCIENCE
(2023)
Article
Orthopedics
Hyung Jun Park, Moon Jong Chang, Tae Woo Kim, Chong Bum Chang, Seung-Baik Kang
Summary: The study aimed to determine the recovery of orthopedic surgery volumes over time during the ongoing COVID-19 pandemic. The impact of COVID-19 on orthopedic surgery volumes weakened as the pandemic continued. While the total volumes of orthopedic surgery decreased by 8.5%-10.1% in the first wave, they recovered to a 2.2%-2.8% decrease from the expected volumes during the second and third waves. The resumption of surgery differed based on the surgical characteristics, with open reduction and internal fixation and cruciate ligament reconstruction decreasing, while total knee arthroplasty showed recovery. Hemiarthroplasty of the hip did not see a decrease throughout the year.
CLINICS IN ORTHOPEDIC SURGERY
(2023)
Article
Orthopedics
Yun Seong Choi, Moon Jong Chang, Ji Han Lee, Jae Hee Lee, Darryl D. D'Lima, Tae Woo Kim, Chong Bum Chang, Seung-Baik Kang
Summary: Repairing MMPRT during OWHTO may improve MMPRT healing and cartilage regeneration of the MFC, even with under-correction, but may not necessarily improve short-term clinical outcomes compared to OWHTO alone. Further randomized clinical trials are needed.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2023)
Article
Medicine, General & Internal
Na-Kyoung Lee, Samuel Jaeyoon Won, Jun-Young Lee, Seung-Baik Kang, So Young Yoo, Chong Bum Chang
Summary: This study revealed a high prevalence of night pain, neuropathic pain, and depressive disorder in patients undergoing total knee arthroplasty (TKA), and patients with these specific conditions reported poorer functional and quality of life scores preoperatively. However, these adverse effects disappeared after TKA.
JOURNAL OF KOREAN MEDICAL SCIENCE
(2022)
Article
Orthopedics
Yun Seong Choi, Tae Woo Kim, Jin Hwa Jeong, Seung-Beom Han, Moon Jong Chang, Chong Bum Chang, Seung-Baik Kang
Summary: This study analyzed the epidemiology of T-score discordance between the spine and femur in the South Korean population and compared the prevalence of T-score discordance between the Korean osteoporosis population and atypical femoral fracture (AFF) patients.
CLINICS IN ORTHOPEDIC SURGERY
(2022)
Article
Orthopedics
Moon Jong Chang, Du Hyun Ro, Tae Woo Kim, Yong Seuk Lee, Hyuk-Soo Han, Chong Bum Chang, Seung-Baik Kang, Myung Chul Lee
Summary: This multicenter study aimed to determine the success rate of debridement, antibiotics, and implant retention (DAIR) for acute knee periprosthetic joint infection (PJI) and compare the outcomes between acute postsurgical infection and acute hematogenous infection. The overall success rate of DAIR was 77%, with a higher success rate in the postsurgical group than in the hematogenous group.
KNEE SURGERY & RELATED RESEARCH
(2022)
Review
Orthopedics
Yun Seong Choi, Tae Woo Kim, Moon Jong Chang, Seung-Baik Kang, Chong Bum Chang
Summary: This review article summarizes the components of the highly recommended ERAS protocol in orthopedic surgery and evaluates its outcomes. It also suggests practical strategies for successful implementation of the ERAS protocol. ERAS in orthopedic surgery reduces complications, hospital stay, and cost, and improves patient outcomes and satisfaction. Standardization of care, multidisciplinary communication, education, and continuous audit are necessary for successful implementation.
KNEE SURGERY & RELATED RESEARCH
(2022)