Chong Bum Chang

PURPOSE: We aimed to compare the modified transtibial and anteromedial (AM) portal techniques of anterior cruciate ligament reconstruction with respect to femoral tunnel position and length, as well as to identify factors associated with tunnel length. METHODS: After exclusions, 105 primary anterior cruciate ligament reconstructions (55 in transtibial group and 50 in AM portal group) were studied. Femoral tunnel positions were assessed on postoperative tunnel-view radiographs, and tunnel lengths

BACKGROUND: A more horizontal femoral tunnel has been emphasized for contemporary anterior cruciate ligament (ACL) reconstruction. However, lowering the femoral tunnel may result in a shorter tunnel. In addition, a more horizontally placed femoral tunnel may have inadequate bone stock at the posterior portion of the tunnel, which can lead to protrusion of the cross-pin (Rigidfix) system for femoral fixation. HYPOTHESIS: A more horizontal femoral tunnel position, particularly via the anteromedial

PURPOSE: We aimed to determine the efficacy of periarticular (PA) multimodal drug cocktail (MDC) infiltration for pain control after anterior cruciate ligament reconstruction with an autogenous bone-patellar tendon-bone graft. METHODS: We randomly assigned 100 patients to five study groups (20 per group): control group, no injection; intra-articular (IA) ropivacaine group, IA injection of ropivacaine alone; IA MDC group, IA injection of MDC; PA MDC group, PA injection of MDC; and IA + PA MDC gro

In a prospective multicentre study we investigated variations in pain management used by knee arthroplasty surgeons in order to compare the differences in pain levels among patients undergoing total knee replacements (TKR), and to compare the effectiveness of pain management protocols. The protocols, peri-operative levels of pain and patient satisfaction were investigated in 424 patients who underwent TKR in 14 hospitals. The protocols were highly variable and peri-operative pain levels varied s

BACKGROUND: Occasionally, patients experience new or increased ankle pain following total knee arthroplasty (TKA). The aims of this study were to determine (1) how the correction of varus malalignment of the lower limb following TKA affected changes in alignment of the ankle and hindfoot, (2) the difference in changes in alignment of the ankle and hindfoot between patients with and without ankle osteoarthritis (OA), and (3) whether the rate of ankle pain and the clinical outcome following TKA di

This study sought to demonstrate bone mineral density (BMD) conditions in elderly female patients with knee osteoarthritis (OA) undergoing total knee arthroplasty (TKA). In addition, we sought to determine whether their BMD conditions differ from those of community-based females without knee OA. Finally we sought to determine whether clinical statuses are related to BMD in the knee OA patients. BMD conditions in 347 female patients undergoing TKA and 273 community-based females were evaluated. A

BACKGROUND: Patient age, radiographic severity of osteoarthritis (OA), and severity of symptoms are typically considered as the three key factors in selecting the osteoarthritic patients for total knee arthroplasty (TKA). The purpose of this study was to evaluate the associations between the three selection criteria and the postoperative outcomes including patient satisfaction. We also attempted to determine whether the patients not fully satisfying the criteria are different from the typical ca

Radiographic lumbar spine degeneration and lumbar spine symptoms are common among patients with advanced knee OA undergoing TKA. Severe lumbar spine symptoms (visual analog scale score of ≥ 7) were likely to adversely affect the preoperative clinical scores of patients undergoing TKA; however, most of the adverse effects were not found 2 years after TKA. Nevertheless, because preexisting severe radiating pain during activity may be a source of a poorer outcome after TKA, careful patient consulta

PURPOSE: Knee pain is a very common symptom of knee osteoarthritis (OA), and identification of the major contributors to knee pain is important to establish management plans for patients with knee OA. Among the potential contributors, we hypothesized that coexisting depressive symptoms might increase the severity of knee pain because the increased cytokine levels and neurotransmitter changes related to depression are known to influence the threshold of physical pain perception. Therefore, a poss