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Trends in Surgical Treatment of Femoral Head Osteonecrosis in South Korea: An Analysis Using Nationwide Claims Database

Park JW, Kim HS, Park S, Kim SH, Lee YK, Koo KH

Background: Osteonecrosis of the femoral head (ONFH) involves young or middle-aged adults, and its incidence is increasing along with increasing use of steroids in the management of organ transplantation and...
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Nested Case Control Study on the Risk of Suicide Death in Elderly Patients with Pelvic Fractures Using a Nationwide Cohort

Jang SY, Cha Y, Kim KJ, Kim HY, Choy WS, Koo KH

Background: The aim of this study was to investigate the incidence rate of suicide deaths in elderly patients with pelvic fractures using a nationwide database and to analyze change in...
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Operational Definition Identifying Osteoporotic Vertebral Fractures in the Claims Database

Yu MH, Hong N, Lee S, Kim HY, Park HS, Park SM, Lee YK, Kim TY, Ha YC, Rhee Y, Koo KH

Background: We analyzed the International Classification of Diseases, 10th edition (ICD-10) diagnostic codes, procedure codes, and radiographic image codes for vertebral fracture (VF) used in the database of Health Insurance...
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Is Restoration of Hip Center Mandatory for Total Hip Arthroplasty of Protrusio Acetabuli?

Lee BS, Kim HS, Kwon OS, Lee YK, Ha YC, Koo KH

Purpose: While initial fixation using a press-fit of the acetabular cup is critical for the durability of the component, restoration of the hip center is regarded as an attributable factor...
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Surgeons’ Awareness and Impaction Technique of a Ceramic Liner into a Metal Shell

Kim HS, Park JW, Lee YK, Porporati AA, Ha YC, Koo KH

Background: In ceramic-on-ceramic total hip arthroplasty, firm locking is necessary between a ceramic liner and an acetabular metal shell to prevent dissociation of the liner from the metal shell. We...
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Orthopedic Patients with Mental Disorder: Literature Review on Preoperative and Postoperative Precautions

Yoo JI, Cha Y, Kim JT, Park CH, Choy W, Koo KH

Because of the increasing global trend of patients with mental disorders, orthopedic surgeons are more likely to encounter orthopedic patients with mental disorders in clinical settings. Identifying the characteristics of...
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Do Cementless Short Tapered Stems Reduce the Incidence of Thigh Pain After Hip Arthroplasty? Systematic Review and Meta-Analysis

Yoo JI, Cha Y, Lee YK, Ha YC, Koo KH

Background: The purpose of this study was to determine whether short tapered stems reduce the rate of thigh pain through a systematic review and meta-analysis of comparative studies between short...
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Effectiveness of Online Video Instruction on Time to Start Ambulation and Duration of Hospital Stay, Satisfaction and Functional Recovery in Patients Undergoing Total Hip Arthroplasty

Kim HS, Lee YK, Won SJ, Park SJ, Park JW, Koo KH

Background: At the end of 2014, we implemented an online video to inform patients of the entire process from admission to rehabilitation after total hip arthroplasty (THA). In this study,...
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Hip Fracture Management during the COVID-19 Pandemic in South Korea

Chung JW, Ha YC, Lee MK, Kim JH, Park JW, Koo KH

Background: The purpose of this study was to introduce a screening system for coronavirus disease 2019 (COVID-19), to evaluate the overall orthopedic management in hip fracture patients during the COVID-19...
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Controversial Issues in Arthroscopic Surgery for Femoroacetabular Impingement

Khanduja V, Ha YC, Koo KH

Femoroacetabular impingement (FAI) is a common cause of painful hip in the young and middle-aged population. This condition frequently leads to a labral tear, damage of acetabular cartilage, and secondary...
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Comparison of Mortality, Length of Hospital Stay and Transfusion between Hemiarthroplasty and Total Hip Arthroplasty in Octo- and Nonagenarian Patients with Femoral Neck Fracture: a Nationwide Study in Korea

Yoo JI, Jang SY, Cha Y, Choy WS, Koo KH

Background: The purpose of this study was to compare the mortality rate between patients undergoing hemiarthroplasty (HA) and those undergoing total hip arthroplasty (THA) in two age groups: patients aged...
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Effect of Dementia on Postoperative Mortality in Elderly Patients with Hip Fracture

Ha YC, Cha Y, Yoo JI, Lee J, Lee YK, Koo KH

Background The aim of this study was to assess the prevalence of dementia as an underlying disease in elderly patients with hip fracture, to investigate the effect of dementia on postoperative...
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Updated Guide to the Treatment of Osteonecrosis of the Femoral Head

Yeom JU, Kim YS, Koo KH

Osteonecrosis of the femoral head usually affects young or middle-aged adults and frequently leading to femoral head collapse and hip arthritis. This review reports the updated treatments of the disease.
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Osteonecrosis of the Femoral Head: an Updated Review of ARCO on Pathogenesis, Staging and Treatment

Hines JT, Jo WL, Cui Q, Mont MA, Koo KH, Cheng EY, Goodman SB, Ha YC, Hernigou P, Jones LC, Kim SY, Sakai T, Sugano N, Yamamoto T, Lee MS, Zhao D, Drescher W, Kim TY, Lee YK, Yoon BH, Baek SH, Ando W, Kim HS, Park JW

Non-traumatic osteonecrosis of the femoral head (ONFH) usually affects adults younger than 50 years and frequently leads to femoral head collapse and subsequent arthritis of the hip. It is becoming more...
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ARCO Consensus on the Pathogenesis of Non-traumatic Osteonecrosis of the Femoral Head

Cui Q, Jo WL, Koo KH, Cheng EY, Drescher W, Goodman SB, Ha YC, Hernigou P, Jones LC, Kim SY, Lee KS, Lee MS, Lee YJ, Mont MA, Sugano N, Taliaferro J, Yamamoto T, Zhao D

Osteonecrosis of the femoral head (ONFH) is a devastating disease frequently leading to femoral head collapse and hip arthritis. Specifically, non-traumatic ONFH primarily affects young and middle-aged adults. Although compromised...
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Vitamin D Deficiency and Sarcopenia in Hip Fracture Patients

Kim HS, Jang G, Park JW, Lee YK, Koo KH

Background: Vitamin D plays a critical role in the proliferation and differentiation of skeletal muscle and bone metabolism. We compared the prevalence of vitamin D deficiency in elderly patients undergoing...
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Mechanical Properties of Single Muscle Fibers: Understanding Poor Muscle Quality in Older Adults with Diabetes

Lee EJ, Jang HC, Koo KH, Kim HY, Lim JY

Background: While aging causes muscle weakness, type 2 diabetes mellitus (T2DM) is also considered a high-risk factor for the induction of skeletal muscle weakness. Previous studies have reported increased collagen...
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Current and Future Burden of Periprosthetic Joint Infection from National Claim Database

Kim HS, Park JW, Moon SY, Lee YK, Ha YC, Koo KH

Background: Periprosthetic joint infection (PJI) is the most serious complication after total joint arthroplasty. The incidence and burden of PJI in North America have been reported. There might be potential differences...
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Blood Transfusion for Elderly Patients with Hip Fracture: a Nationwide Cohort Study

Jang SY, Cha YH, Yoo JI, Oh T, Kim JT, Park CH, Choy WS, Ha YC, Koo KH

Background: This nationwide study aimed to investigate the blood transfusion status of elderly hip fracture patients and to examine the effect of packed red blood cell transfusion on all-cause mortality. Methods:...
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Physicians’ Attitudes on Management of Osteopenia in South Korea

Ha JH, Kim HS, Won SJ, Lee YK, Koo KH

Background: Osteopenia patients have a risk of fracture and may develop osteoporosis. We investigated physicians’ management of osteopenia patients in South Korea. Methods: A survey was conducted using a questionnaire including 6...
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