Publications by authors named "Joon-Hee Cho"
Introduction: This study aimed to compare the differences in the radiological, clinical, and functional outcomes and the estimated restoration rate of native knee alignment between total knee arthroplasty (TKA) with bi-cruciate stabilized (BCS) and posterior stabilized (PS) design.
Materials And Methods: This retrospective study included consecutive patients between 2020 and 2021 who underwent TKA. The patients were divided into two groups (group I, Journey II BCS TKA [106 knees]; group II, Persona PS TKA [106 knees]) after 1:1 propensity score matching.
Article Synopsis
- The study aimed to create a machine learning model to predict lateral compartment osteoarthritis (OA) in patients with a discoid lateral meniscus (DLM), focusing on age as a contributing factor.
- Data from 611 patients diagnosed with DLM using MRI were analyzed using various algorithms, and extreme gradient boosting was found to be the most effective model for predictions.
- Age was the top predictor for younger patients, while the presence of medial compartment OA became more predictive in older patients, highlighting the importance of age and medial OA in treatment strategies.
Article Synopsis
- A machine learning model was developed to determine when double-level osteotomy (DLO) is preferred for severe varus knees, focusing on factors that lead to unfavorable surgical outcomes compared to opening-wedge high tibial osteotomy (OWHTO).
- The study analyzed data from 505 knees undergoing OWHTO and identified unfavorable outcomes based on specific angles and recurrence of deformities, using demographic and preoperative data as inputs for the model.
- The light gradient boosting machine (LGBM) algorithm performed best, highlighting preoperative weight-bearing line ratio (WBLR), joint line convergence angle (JLCA), and their changes (ΔWBLR) as key factors influencing the likelihood of a successful DLO.
Constitutional alignment predicts medial ligament balancing in mechanically aligned total knee arthroplasty for varus knees.
Knee Surg Sports Traumatol Arthrosc
December 2023
Article Synopsis
- The study aimed to determine if factors like constitutional alignment and specific preoperative radiologic parameters influenced the need for medial gap balancing during total knee arthroplasty (TKA).
- A total of 263 patients with 394 knees were analyzed, with 40.1% requiring medial ligament balancing through multiple needle puncturing (MNP) due to various alignment issues.
- Findings showed that those needing MNP had greater constitutional varus alignment and changes in specific knee angles post-surgery, indicating that ligament balancing was more related to constitutional alignment rather than soft tissue issues.
Constitutional and postoperative joint line obliquity can predict serial alignment change after opening-wedge high tibial osteotomy: analysis using coronal plane alignment of the knee classification.
Knee Surg Sports Traumatol Arthrosc
December 2023
Purpose: The purposes of this study were (1) to clarify the distribution of the Coronal Plane Alignment of the Knee (CPAK) phenotype in patients who underwent medial opening-wedge high tibial osteotomy (OWHTO) and (2) to identify the predictive factors for postoperative serial alignment changes after OWHTO by analyzing constitutional phenotypes.
Methods: Patients who underwent OWHTO between March 2014 and December 2019 were retrospectively evaluated. Those who completed a minimum follow-up of 3 years were divided into three groups based on the direction of alignment changes from postoperative 3 months to the final follow-up: Group 1 (varus direction) when the weight-bearing line ratio (WBLR) change was less than - 4%, Group 2 (maintained) when the WBLR change was between - 4% and 4%, and Group 3 (valgus direction) when the WBLR change was greater than 4%.
Article Synopsis
- The study compared the effects of anterior referencing (AR) and posterior referencing (PR) systems on implant selection and alignment in total knee arthroplasty (TKA) among 270 patients.
- Results showed that patients in the AR group were more likely to experience changes in femoral component size and had a higher rate of femoral asymmetry in bilateral TKAs, but both groups achieved similar clinical outcomes after two years.
- The findings suggest that while AR systems can effectively restore posterior condylar offset, they may lead to more anterior notching, indicating that the differences are more influenced by specific implant designs and surgical techniques rather than the referencing system used.
Background: The aims of this study were (1) to compare in vivo coverage and rotational alignment of 2 tibial component designs: anatomic and symmetrical; and (2) to determine if coronal deformity and tibial torsion were related to rotation and coverage.
Methods: Postoperative CT scans of 200 propensity score-matched patients who underwent TKA with either an anatomic (ATC) or symmetrical tibia component (STC) were analyzed. Rotation was measured using four axes: surgical transepicondylar axis (sTEA), Berger's protocol, medio-lateral (ML) axis and posterior borders of the tibial plateau, while coverage was assessed by measuring fit and surface area.
Purpose: To analyze the effect of the arthroscopic meniscal procedure in adult discoid lateral meniscus (DLM) according to the age and meniscal-preserving by making comparisons with the nondiscoid lateral meniscus (N-DLM).
Methods: From March 2014 to October 2020, a comparative analysis was performed in adults with DLM who underwent arthroscopic meniscal procedures (operative DLM: 134 knees), nonoperative treatment (nonoperative DLM: 56 knees), and adult N-DLM who underwent arthroscopic meniscal procedures (operative N-DLM: 64 knees). These patients were between 20 and 65 years old and completed a minimum follow-up of 2 years.
Background: Patient satisfaction following primary total knee arthroplasty (TKA) is a crucial part to evaluate the success of the procedure. The purpose of this study was to develop to predict patient satisfaction following TKA.
Methods: Satisfaction outcome data after 435 consecutive conventional TKAs performed between August 2020 and December 2021 were retrospectively collected.
Iron supplementation provides iron storage and facilitates effective production of hemoglobin. The purpose of this study was to investigate the effect of early postoperative intravenous (IV) iron supplementation in different types of total knee arthroplasty (TKA) surgery. We retrospectively analyzed 863 patients who underwent TKA between September 2017 and September 2021.
View Article and Find Full Text PDFPurpose: To compare the changes in patellofemoral (PF) joint alignment, focusing on multiple planes, between two different types of biplanar medial opening-wedge high tibial osteotomy (OWHTO).
Methods: Patients who underwent biplanar OWHTO between July 2017 and May 2021 were retrospectively evaluated. They were allocated to either the supra-tubercular (ST)- or retro-tubercular (RT)-OWHTO group.
Purpose: In this study, the relationship between patient-specific geometric factors and tunnel placement in graft impingement was identified by using magnetic resonance imaging (MRI) signal intensity of anterior cruciate ligament (ACL) grafts.
Methods: Ninety-two patients, who were treated between 2014 and 2020, were included retrospectively. These patients underwent primary remnant-preserving outside-in ACL reconstruction (ACLR) and were followed up with postoperative MRI at least one year after surgery.
(1) Background: There have been many attempts to predict the weight-bearing line (WBL) ratio using simple knee radiographs. Using a convolutional neural network (CNN), we focused on predicting the WBL ratio quantitatively. (2) Methods: From March 2003 to December 2021, 2410 patients with 4790 knee AP radiographs were randomly selected using stratified random sampling.
View Article and Find Full Text PDFPurpose: To investigate the incidence rate of massive submacular haemorrhage (SMH) and risk factors in polypoidal choroidal vasculopathy (PCV) and typical neovascular age-related macular degeneration (tnAMD).
Methods: A total of 465 patients who were diagnosed with either PCV (n = 245) or tnAMD (n = 220) from 2003 to 2014 were enrolled. Cumulative incidence of massive SMH in PCV and that in tnAMD were compared.
Article Synopsis
- A nationwide study analyzed data from over 186,000 patients in South Korea to explore the link between retinal vein occlusion (RVO) and the risk of developing cancer.
- The findings showed that patients with RVO had a 29% higher risk of cancer compared to matched controls, with the incidence of cancer significantly higher in the RVO group (25.55 per 1000 person-years) than in the control group (18.62 per 1000 person-years).
- The greatest risk was seen with blood-related cancers, indicating a need for further research to understand the relationship and improve cancer screening recommendations for RVO patients.
Macular diseases cause vision loss, as the macula is the functional center for vision. In this study we assessed optical quality in eyes with macular diseases and evaluated the effectiveness of the Optical Quality Analysis System (OQAS) to detect macular diseases. We analyzed 88 eyes of 88 patients with macular diseases (51 men and 37 women; mean age: 65.
View Article and Find Full Text PDFArticle Synopsis
- The study aimed to assess the effectiveness and safety of ranibizumab for patients with neovascular age-related macular degeneration over a 12-week period.
- Results showed significant improvements in best-corrected visual acuity (BCVA) and identified factors like lower baseline BCVA, younger age, and treatment-naive status as predictors of better visual outcomes.
- Overall, the findings indicated that ranibizumab treatment leads to notable visual and anatomical improvements, especially for patients who have not received prior treatment.
Purpose: To study the association between the risk of massive submacular hemorrhage (SMH) and polyp regression after initial treatment of polypoidal choroidal vasculopathy using long-term follow-up data.
Methods: Retrospective study of 223 patients who were diagnosed with polypoidal choroidal vasculopathy and were followed up for up to 11 years. Subjects were categorized into "regression" and "no regression" groups, according to their polyp status after the initial treatment.
Objectives: To determine the risk factors for retinal microvascular impairment on optical coherence tomography angiography (OCT-A) in type 2 diabetic patients without clinical diabetic retinopathy (DR).
Methods: This retrospective and cross-sectional study enrolled 74 diabetic patients without clinically evident DR for the study group and 34 healthy subjects for the control group. OCT-A parameters were measured to determine vascular density (VD) and the foveal avascular zone (FAZ) size in the superficial and deep capillary plexuses (SCP/DCP) of the retina.
Purpose: Little is known about the isometry of anatomic single-bundle anterior cruciate ligament (ACL) tunnel positions although it is closely related to graft tension throughout the range of motion. The purpose of this study was to evaluate intraoperative graft isometry in anatomic single-bundle ACL reconstruction .
Materials And Methods: Graft length changes were assessed before bio-screw fixation in the tibial tunnel by pulling the graft with tensions of 20 lbs and 30 lbs in full extension at flexion angles of 30°, 60°, 90°, and 120°.
Article Synopsis
- The hip rotator cuff tear is primarily seen in middle-aged individuals, often due to gradual degeneration, akin to shoulder rotator cuff tears.
- Acute tears in the hip abductor muscles, particularly in young people, are rare and typically caused by traumatic events.
- The authors share a unique case involving a young male with an acute traumatic tear in the gluteus medius and discuss treatment outcomes alongside a literature review.
Background: To describe the features of foveal microvasculature using optical coherence tomography angiography (OCTA) and to determine the related clinical factors in eyes with surgically closed macular hole (MH).
Methods: A retrospective case series of 18 patients with unilateral MH was reviewed. The patients maintained complete hole closure after vitrectomy with inner limiting membrane (ILM) peeling for at least 12 months.
Purpose: We aimed to investigate the prevalence of diabetic retinopathy (DR) in patients with diabetic foot ulcer (DFU) and elucidate the association between DR and DFU severities and their shared risk factors.
Methods: A retrospective review was conducted on DFU patients who underwent ophthalmic and vascular examinations within 6 months; 100 type 2 diabetic patients with DFU were included. The medical records of 2496 type 2 diabetic patients without DFU served as control data.