Publications by authors named "Sanglim Lee"

Article Synopsis
  • A deep learning algorithm was developed to analyze distal radius fractures using X-ray images, and its effectiveness was compared with measurements taken by an orthopedic hand surgeon.
  • The study utilized 634 wrist X-ray images, with 507 for training and 127 for testing, to segment the radius and ulna and measure specific radiologic parameters accurately.
  • Results showed high accuracy rates (over 99%) for segmentation, and strong correlations (Pearson and intraclass correlation coefficients) between the algorithm's measurements and the manual methods used by the surgeon.
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The recent increase in the tendency of people to marry late or to opt out of marriage entirely is among the key contributors to Korea's low fertility rate. One possible cause of this tendency may be a change in how marriage is valued among Korea's youth. The marriage intentions of young adults can be classified into "positive", "negative", and "neutral".

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Article Synopsis
  • Locking of the thumb's metacarpophalangeal (MCP) joint can occur due to dorsal subluxation from hyperextension injuries, causing it to be stuck in mild hyperextension.
  • The study discusses four cases where patients experienced locked MCP joints due to the radial sesamoid being caught after injuries involving hyperextension or forced flexion.
  • It is suggested that if thumb movement is restricted after such injuries, evaluating the radial sesamoid is crucial, and excising it may help unlock the joint.
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  • Volar plate avulsion fractures of the proximal interphalangeal (PIP) joint are common injuries typically treated conservatively, but this approach may fail if the fracture fragments are significantly displaced or rotated.
  • A study analyzed 88 cases of such fractures to compare outcomes between successful conservative treatments and those needing surgical intervention after around 75 days.
  • Results showed that joint dislocation and more severe displacement or rotation were linked to treatment failure, but those requiring surgery experienced improved pain and range of motion post-excision.
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Background: The restriction of wrist motion results in limited hand function, and the evaluation of the range of wrist motion is related to the evaluation of wrist function. To analyze and compare the wrist motion during four selected tasks, we developed a new desktop motion analysis system using the motion controller for a home video game console.

Methods: Eighteen healthy, right-handed subjects performed 15 trials of selective tasks (dart throwing, hammering, circumduction, and winding thread on a reel) with both wrists.

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Article Synopsis
  • * Malalignments can cause mechanical strain, weakening ligaments, and instability in the wrist, with radial corrective osteotomy proposed as a potential treatment.
  • * Two cases are highlighted where traditional treatments failed, revealing that fixed lunate flexion deformity may lead to arthritis in the radiolunate joint post-injury.
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Soft tissue and bone defects of the lower leg, ankle, and heel region often require coverage by local or distant flaps. The authors successfully used the distally based adipomuscular abductor hallucis flap for the treatment of 7 patients with soft tissue defect on the plantar forefoot after diabetic ulcer (n = 2), excision of melanoma at the medial forefoot (n = 3), and posttraumatic defects of the plantar forefoot (n = 2). The size of the defects ranged from 6 to 36 cm.

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Background: Buddy taping is a well known and useful method for treating sprains, dislocations, and other injuries of the fingers or toes. However, the authors have often seen complications associated with buddy taping such as necrosis of the skin, infections, loss of fixation, and limited joint motion. To our knowledge, there are no studies regarding the complications of buddy taping.

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Article Synopsis
  • The study examined 14 cases of finger volar plate avulsion fractures, treating them either through excision or internal fixation.
  • Results showed that fractures fixed internally had larger fragments, shorter preoperative periods, and more significant involvement of the joint surface than those treated by excision.
  • Despite differences in initial fracture characteristics, postoperative outcomes like pain, patient satisfaction, and healing time were similar for both treatment methods, indicating that the size and shape of the fracture may guide treatment choices, but do not affect recovery results.
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  • * A survey involving 76 orthopedic surgeons revealed that while most agree on the treatment, significant differences exist regarding the choice of pinning technique and approaches to elbow range of motion exercises post-treatment.
  • * Pediatric orthopedic surgeons tend to prefer active range of motion exercises, while hand and general orthopedic surgeons express more concern about potential elbow stiffness and favor gentler, passive exercises during rehabilitation.
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  • The stress test is a diagnostic tool used to assess injuries to the radial collateral ligament (RCL) in the thumb's MCP joint, which helps determine if surgery is needed.* -
  • In a recent case, a patient suffered a locked MCP joint following a stress test, indicating a more severe issue.* -
  • The injury involved both the RCL and the volar plate, which are critical structures for thumb function.*
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  • The study introduces a loop-tendon suture technique aimed at simplifying tension adjustments and promoting early rehabilitation post tendon transfer or graft surgeries.
  • Biomechanical testing on chicken flexor tendons shows that the loop-tendon suture provides significantly greater tensile strength compared to the traditional end-weave suture.
  • In clinical applications involving 27 surgeries, the loop-tendon suture led to positive patient outcomes with no tendon ruptures observed, suggesting its effectiveness for tendon reconstruction.
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  • Idiopathic ulnar impaction syndrome is a degenerative wrist condition affecting patients with specific wrist anatomy, often without previous injuries, which can lead to pain and dysfunction.
  • In this study, 31 wrists from 29 patients underwent ulnar shortening osteotomy, resulting in significant improvement in wrist alignment and function, as measured by pre- and postoperative scores.
  • The procedure effectively reduced the ulnar variance and associated subluxation, while also resolving cystic changes in the wrist over time, showing overall positive outcomes for the patients.
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  • The study focuses on a triangular-shaped abnormal ossification center in the distal phalanx of the thumb that leads to angular deformities, and evaluates the outcomes of a surgical procedure called corrective closing-wedge osteotomy.
  • Six patients, averaging 43 months old, underwent surgery to correct thumb deformities, showing significant improvement in angular deviation from 30 degrees preoperatively to 12 degrees post-surgery, with all surgeries healing well.
  • The findings suggest that abnormal triangular epiphysis affecting thumb shape differs from delta bone and can be effectively addressed through either intraepiphyseal or proximal phalangeal osteotomy, with intraepiphyseal offering superior correction results.
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Article Synopsis
  • Idiopathic ulnar impaction syndrome is a wrist condition caused by congenital or dynamic positive ulnar variance, and this study aimed to assess the clinical features and outcomes of a specific surgical treatment, ulnar shortening osteotomy, for affected patients.
  • A total of 31 wrists in 29 patients underwent the surgery, which significantly decreased the average ulnar variance from +4.6 mm to -0.7 mm and improved patient-reported wrist function scores postoperatively.
  • The surgery not only enhanced wrist function and reduced ulnar joint subluxation but also resolved pre-existing cystic changes in the carpal bones in the majority of patients within one to two years.
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