Article
Orthopedics
Brian P. Chalmers, Tracy M. Borsinger, Fernando J. Quevedo Gonzalez, Jonathan M. Vigdorchik, Steven B. Haas, Michael P. Ast
Summary: During robotic and computer-navigated primary total knee arthroplasty, using the center of the femoral head as the reference point for femoral component position results in 1.4 degrees less flexion compared with referencing the intramedullary canal. Surgeons should be aware of these differences as they may ultimately influence knee kinematics.
Article
Orthopedics
M. E. Roy, L. A. Whiteside, K. K. Ly, M. J. Gauvain
Summary: The study found that CoCr femoral components used in total knee arthroplasty experience material loss and scratching during wear, while ceramic femoral components showed superior wear resistance with minimal surface damage. This difference may have implications for managing postoperative pain after TKA.
BONE & JOINT JOURNAL
(2021)
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
Orthopedics
Akihiko Takeuchi, Norio Yamamoto, Takaaki Ohmori, Katsuhiro Hayashi, Shinji Miwa, Kentaro Igarashi, Takashi Higuchi, Kensaku Abe, Hirotaka Yonezawa, Sei Morinaga, Yoshihiro Araki, Yohei Asano, Shiro Saito, Hiroyuki Tsuchiya
Summary: Giant cell tumor of bone (GCTB) is an intermediate tumor commonly treated with surgery to preserve the joint. Calcium phosphate cement (CPC) is an artificial bone substitute used for defect adjustment and promoting healing. This study presents a case of secondary osteoarthritis after CPC packing for GCTB curettage that was successfully treated with total knee arthroplasty (TKA) using a computed tomography (CT)-free navigation system.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Orthopedics
C. Theil, J. Schwarze, G. Gosheger, L. Poggenpohl, T. Ackmann, B. Moellenbeck, T. Schmidt-Braekling, H. Ahrens
Summary: The study found that single-design CCK implants have excellent long-term survival in primary TKA, but worse survival in revision TKA. Males, smokers, and obese patients are at higher risk for revision. Infection remains a major concern for re-revision cases.
KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY
(2022)
Article
Orthopedics
Do Weon Lee, Joonhee Lee, Junpyo Lee, Du Hyun Ro, Myung Chul Lee, Hyuk-Soo Han
Summary: This study compared the sagittal alignment and clinical outcomes of total knee arthroplasty performed with flexible and rigid femoral intramedullary guides. The results showed no significant differences in clinical and radiological outcomes between the two groups. In cases with severe distal femoral sagittal bowing, the use of a flexible rod resulted in larger femoral component flexion angle and reduced incidence of anteroposterior oversizing compared to a rigid rod.
JOURNAL OF KNEE SURGERY
(2022)
Review
Materials Science, Multidisciplinary
M. K. G. Abbas, S. Ramesh, S. F. H. Tasfy, K. Y. Sara Lee
Summary: This review provides a comprehensive overview of alumina-zirconia composites (ATZs), including the properties of zirconia and alumina ceramics, methods for combining them, and the effects of sintering conditions on their performance. Previous studies have reached a consensus on the influence of sintering temperature, sintering time, and alumina content, and microwave sintering has demonstrated superiority. By understanding the factors influencing ATZ, tailored composites with desired properties can be produced for specific applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Boyang Wang, Guoliang Zhang, Ribusurong Pu, Qiang Li, Yuewen Wang
Summary: Morphological parameters of knee joint are influenced by race and nationality. Currently, knee prostheses are primarily designed based on data from white males, leading to complications and economic burdens for other ethnic groups. The specific data and characteristics of the Mongolian ethnic group remain unknown. To improve accuracy in patient treatment, we conducted measurements of the femoral condyle in Mongolian individuals. Statistical analysis revealed significant differences in these measurements compared to other ethnic groups, as well as gender variations.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Kohei Nishitani, Shinichi Kuriyama, Shinichiro Nakamura, Young Dong Song, Yugo Morita, Hiromu Ito, Shuichi Matsuda
Summary: This study investigates the biomechanical effect of excessive flexion of the femoral component in total knee arthroplasty (TKA). The results show that excessive flexion leads to abnormal kinematics and increased contact/ligament forces. Avoiding excessive flexion and maintaining mild flexion of the femoral component would provide better kinematics and biomechanical effects in TKA.
SCIENTIFIC REPORTS
(2023)
Article
Orthopedics
Theodore Quan, Kevin Y. Wang, Alex Gu, Casey Gioia, Michael-Alexander Malahias, William T. Stoll, Savyasachi C. Thakkar, Joshua C. Campbell
Summary: This study compared 30-day complications between conversion total knee arthroplasty (TKA) and primary TKA, as well as between conversion TKA and revision TKA. Patients undergoing conversion TKA were found to have higher risks of complications compared to primary TKA patients, but lower risk of sepsis compared to revision TKA patients.
Article
Orthopedics
Tetsuro Ushio, Satoshi Hamai, Ken Okazaki, Hirotaka Gondo, Satoru Ikebe, Hidehiko Higaki, Yasuharu Nakashima
Summary: The study evaluated knee kinematics and clinical outcomes of a novel TKA design to prevent mid-flexion instability after surgery. Results showed that the design provided stable kinematics and favorable clinical results during dynamic movements, with significant improvements in patient-reported outcomes.
JOURNAL OF ORTHOPAEDIC SCIENCE
(2022)
Article
Orthopedics
Xiaofeng Zhang, Qianjin Wang, Xingquan Xu, Dongyang Chen, Zhengyuan Bao, Yao Yao, Dengxian Wu, Bin Wang, Zhihong Xu, Qing Jiang
Summary: The current study demonstrated a correlation between sagittal femoral bowing angle and coronal femoral bowing angle in patients undergoing total knee arthroplasty (TKA), with patients with sagittal femoral bowing usually not presenting coronal femoral bowing. Sagittal femoral bowing angle could affect femoral component alignment in the sagittal plane, while coronal femoral bowing angle could affect femoral component alignment in the coronal plane. Age, BMI, and gender were not correlated with sagittal femoral or coronal femoral bowing angles.
JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH
(2021)
Article
Chemistry, Physical
Ludmila Mahnicka-Goremikina, Ruta Svinka, Visvaldis Svinka, Vadims Goremikins, Svetlana Ilic, Liga Grase, Inna Juhnevica, Maris Rundans, Toms Valdemars Eiduks, Arturs Pludons
Summary: The purpose of this study was to investigate the influence of WO3 nanoparticles on the evolution of aluminum tungstate and zircon crystalline phases in mullite ceramics. The use of nano-WO3 prevented the dissociation of zircon, increased porosity, intensified the aluminum tungstate phase, decreased bulk density, and increased thermal shock resistance.
Article
Orthopedics
Hyunkyu Ko, Christopher E. Pelt, Brook Martin, Vincent D. Pellegrini
Summary: This study compared patient-reported outcomes (PROs) before and after total knee arthroplasty (TKA) using cemented and cementless fixation methods. The findings showed that patients with cemented fixation experienced greater improvements in knee outcomes in the early post-operative period compared to those with cementless fixation.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Engineering, Manufacturing
L'udmila Hodasova, Jordi Sans, Brenda G. Molina, Carlos Aleman, Luis Llanes, Gemma Fargas, Elaine Armelin
Summary: This study describes the design and manufacture of a novel porous zirconia scaffold utilizing polymer-infiltrated ceramic network and 3D printing technologies. By employing specific ceramic pastes and a biocompatible adhesive, the scaffold was effectively reinforced and pores were adequately filled. The new system demonstrated reduced bacteria proliferation during incubation, showing promising potential for biomedical applications.
ADDITIVE MANUFACTURING
(2021)
