Seung-Beom Han

Korea University, Sŏul, Seoul, South Korea

Are you Seung-Beom Han?

Claim your profile

Publications (28)51.03 Total impact

  • Young-Soo Shin, Seung-Beom Han, Tae-Wan Jung
    [Show abstract] [Hide abstract]
    ABSTRACT: We prospectively analyzed 83 patients who underwent ceramic-on-ceramic THA using preassembled (n=22) or modular acetabular components (n=61) between June 2010 and June 2012. There were no significant differences in mean postoperative radiographic outcomes, functional outcomes, or complications between the two groups. Both groups showed satisfactory performance at the 2year follow up. Only the gender of the patients was significantly different between the two groups. Half of the women had smaller acetabular diameters accommodating a cup size of only 48-50-mm. Although a preassembled cup with a 36-mm ceramic liner is proven to be safe in the short term, future research should focus on evaluating the long-term risks.
    The Journal of arthroplasty. 06/2014;
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: An early diagnosis of popliteal artery pseudoaneurysm-a sequela of popliteal artery trauma-is difficult owing to its late presentation following total knee arthroplasty. The incidence of a popliteal artery pseudoaneurysm with a hematoma presenting only a peripheral nerve injury after total knee arthroplasty is also uncommon in the absence of common diagnostic features such as a pulsatile swelling with an audible bruit on auscultation. In the present report, we describe popliteal artery pseudoaneurysm following total knee arthroplasty.
    Knee surgery & related research. 06/2014; 26(2):117-20.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The graft-healing potential of mesenchymal stromal cells (MSCs) derived from the remnants of ruptured anterior cruciate ligaments (ACLs) after ACL reconstruction may depend on the chronicity of the injury. The aim of this study was to assess the quantitative and phenotypic differences between MSCs isolated from ACL remnants in patients with (sub)acute and chronic tearing. Torn ACL remnants were harvested during ACL reconstruction from 41 patients, 24 with (sub)acute ACL (<6 months from injury to surgery) and 17 with chronic ACL (time interval >6 months) tears. MSCs isolated from these samples were assessed for quantitative and phenotypic differences, and the correlation between the proportion of MSCs and the chronicity of ACL tear was evaluated. At passage 0, the mean proportion of MSCs (CD34(-), CD44(+), CD90(+) and CD105(+)) was higher in (sub)acute than in chronic ACL tear samples (20.69% ± 7.82% versus 9.85% ± 8.01%, P < 0.001). At passages 1 and 2, however, MSC proportions did not differ significantly in the two groups. Time interval showed a negative correlation with MSC proportion only at passage 0 (r = -0.505, P < 0.001). The optimal cutoff value for time from injury to surgery yielding <10% freshly isolated ACL-MSCs, a percentage expected to have low tissue healing potential, was 23.5 months. The proportion of freshly isolated MSCs was higher in samples from patients with (sub)acute tearing than in chronic ACL tearing and negatively correlated with the time interval between trauma and surgery.
    Cytotherapy 01/2014; · 3.06 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to investigate the mechanism underlying the development of gap differences in total knee arthroplasty using the navigation-assisted gap technique and to assess whether these gap differences have statistical significance. Ninety-two patients (105 knees) implanted with cruciate-retaining prostheses using the navigation-assisted gap balancing technique were prospectively analysed. Medial extension and flexion gaps and lateral extension and flexion gaps were measured at full extension and at 90° of flexion. Repeated measures analysis of variance was used to compare the mean values of these four gaps. The correlation coefficient between each pair of gaps was assessed using Pearson's correlation analysis. Mean intra-operative medial and lateral extension gaps were 20.6 ± 2.1 and 21.7 ± 2.2 mm, respectively, and mean intra-operative medial and lateral flexion gaps were 21.6 ± 2.7 and 22.1 ± 2.5 mm, respectively. The pairs of gaps differed significantly (P < 0.05 each), except for the difference between the medial flexion and lateral extension gaps (n.s.). All four gaps were significantly correlated with each other, with the highest correlation between the medial and lateral flexion gaps (r = 0.890, P < 0.001) and the lowest between the medial flexion and lateral extension gaps (r = 0.701, P < 0.001). Medial and lateral flexion and extension gaps created using the navigation-assisted gap technique differed significantly, although the differences between them were <2 mm, and the gaps were closely correlated. These narrow ranges of statistically acceptable gap differences and the strong correlations between gaps should be considered by surgeons, as should the risks of soft tissue over-release or unintentional increases in extension or flexion gap after preparation of the other gap. LEVEL OF EVIDENCE: III.
    Knee Surgery Sports Traumatology Arthroscopy 09/2013; · 2.68 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We analyzed 119 knees implanted with mobile bearing floating platform prostheses using the navigation-assisted gap balancing technique to analyze the relationship between intraoperative sagittal movement of floating platforms and soft tissue balancing. The 95 (79.8%) knees were classified into the positive rollback group (mean insert posterior rollback 5.86±1.24mm), and the remaining 24 (20.2%) into the negative rollback group. Lateral flexion gap (LFG) differed significantly between knees with positive and negative rollback (20.5±1.7mm vs 22.1±1.7mm, P=.021). Only LFG significantly influenced the occurrence of bearing sagittal movement. Sagittal translation of the insert occurred in about 80% of knees implanted with mobile bearing floating platforms in TKA, and was affected by flexion gaps, especially on the lateral side.
    The Journal of arthroplasty 05/2013; · 1.79 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We evaluated 106 knees that underwent primary total knee arthroplasty (TKA) with the navigation-assisted gap balancing technique using an e.-motion cruciate retaining floating platform (FP) mobile-bearing prosthesis to prospectively assess the survival of the e.-motion FP system after a minimum follow-up of 4years. There was no evidence of any complications, including dissociation or breakage of the polyethylene liner or component loosening at last follow up (5.1±0.6years). Four knees, however, required re-operation, three for distal femoral fracture, and one for infection. The estimated 5-year prosthesis survival rates without revision for any reason and for prosthesis-associated problems were 96.2% and 100%, respectively. The e.-motion floating platform, with a cruciate retaining design under navigation guidance, demonstrated excellent clinical results and 5-year survival rate.
    The Journal of arthroplasty 04/2013; · 1.79 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: OBJECTIVE: The purpose of this study was to describe the radiological healing process after open reduction and internal fixation (ORIF) of humeral shaft fractures with plate. MATERIALS AND METHODS: We reviewed the data of 53 consecutive patients who had undergone rigid plate fixation of OTA 12 A or B humeral shaft fracture. The mean age of the patients at the time of surgery was 39.4 (range 16-82). Quality of reduction and healing process was analysed on radiographs. Clinical symptom and disabilities of the arm, shoulder and hand (DASH) scores were recorded at follow-up visits. RESULTS: There were 28 compression and 25 neutralization platings. The mean gap size on the postoperative radiograph was 1.4 (range 0.1-6.1). 50 cases (94.3 %) healed, while three cases ended up with non-union. 28 (52.8 %) cases showed primary healing and 22 cases (41.5 %) showed secondary healing with callus bridging. Among the cases with secondary healing, callus formation with resorption was identified in 13 cases. The type of fracture, mode of compression and size of gap on radiographs after rigid plate fixation were found to be statistically significant factors for healing type (p = 0.026, 0.002, and <0.001, respectively). Three cases with non-union showed no improvement in DASH scores. CONCLUSION: Both primary and secondary healing processes were observed after rigid plate fixation of OTA 12 A or B humeral shaft fractures. Our study revealed that size of gap, mode of compression, type of fracture could affect the type of healing, and that periosteal callus formation can occur after rigid plate fixation.
    Archives of Orthopaedic and Trauma Surgery 03/2013; · 1.36 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: PURPOSE: To determine whether navigation-assisted intraoperative lower limb alignment in open wedge high tibial osteotomy (HTO) correlates with preoperative and postoperative radiographic alignment. METHODS: This prospective study involved 35 patients (39 knees) who underwent navigation HTO for primary medial osteoarthritis. The mechanical axis (MA) and weight-bearing line (WBL) ratio were calculated from preoperative radiographs, intraoperative navigation, and postoperative (6 months) radiographs. Reliability between navigation and radiographic alignment was analyzed by use of intraclass correlation coefficients (ICCs) with thresholds as follows: good, greater than 0.75; fair, 0.4 to 0.75; and poor, less than 0.4. The surgical target for the MA was a final valgus overcorrection of 2° to 8°, and the WBL ratio target was between 50% and 70%. Outliers for differences between intraoperative navigation and postoperative radiographic results were defined as greater than ±3° for the MA and greater than ±10% for the WBL ratio. RESULTS: The MA target was achieved in 33 of 39 knees (84.6%), and the WBL ratio target was achieved in 30 of 39 knees (74.4%). ICCs for navigational reliability were good for preoperative MA and WBL ratio and fair for postoperative MA and WBL ratio. The ICCs for the MA were better than those for the WBL ratio for both preoperative and postoperative measurements. The differences between the number of outliers between the navigation and radiographic MA and WBL were greater postoperatively than preoperatively. In addition, the postoperative differences in the extent of the outliers between navigation and radiographic measurements were greater for WBL ratios than the MA (P = .023). CONCLUSIONS: This study found that use of a navigation system achieved the target value for MA lower limb correction in over 80% of open wedge HTO cases, using radiographic data as the gold standard for alignment. Because the navigational measurements of lower limbs during open wedge HTO did not correlate with postoperative radiographic alignment, corrections should not be based solely on navigational results. In assessing the reliability of navigational open wedge HTO for correction of lower limb alignment, the MA is a better radiologic parameter than the WBL ratio. LEVEL OF EVIDENCE: Level IV, therapeutic case series.
    Arthroscopy The Journal of Arthroscopic and Related Surgery 08/2012; · 3.10 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We report a rare complication of spontaneous late dissociation of the tibial insert 2 years after total knee arthroplasty using a high-flex posterior-stabilized Genesis II prosthesis (Smith & Nephew, Memphis, Tenn). It appears that 2 factors may have contributed to dissociation, namely, incomplete seating of the insert and the design of the prosthesis, which involves a shallow anterior tab snap-fit locking mechanism and thin dovetail lips.
    The Journal of arthroplasty 05/2012; · 1.79 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Synovial chondromatosis of the knee joint rarely develops in the posterior septum. Such cases are difficult to treat arthroscopically since the posterior septum is not readily accessible via standard portals. We report two cases of localized synovial chondromatosis in the posterior septum. We used a posterior trans-septal portal to arthroscopically remove the loose bodies and perform a concomitant synovectomy. The two cases were followed-up for 24 and 16 months after surgery, respectively, and the patients were found to be pain-free, have a full range of knee motion and showed no evidence of recurrence. A posterior trans-septal portal may be essential in some cases for treatment of synovial chondromatosis at the posterior septum.
    The Knee 11/2011; 19(5):732-5. · 2.01 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A 34-year-old male presented with right knee instability without any trauma. He had been diagnosed with right knee gouty arthritis 2 years prior. An arthroscopic examination revealed abundant calcific material deposited around the knee joint, including in the ACL tissue, and that the ACL was torn at the femoral attachment site. Treatment involved a synovectomy to remove calcific material, followed by an ACL reconstruction. Histology evaluation revealed gouty arthritis with the presence of tophi in the synovium, soft tissue, and ACL tissue. The case presented here indicates the possibility of pathologic rupture of the ACL associated with gouty tophus infiltration of that ligament. Level of evidence IV.
    Knee Surgery Sports Traumatology Arthroscopy 11/2011; 20(8):1540-2. · 2.68 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Tuberculous arthritis is difficult to diagnose early because of its atypical insidious clinical manifestations and non-specific imaging findings. Specifically, monoarticular tuberculosis of the knee may mimic pigmented villonodular synovitis (PVNS). The present report describes a young patient with tuberculous arthritis of the knee. Proper diagnosis was delayed due to magnetic resonance imaging findings, such as hemosiderin deposits and a nodular mass around the knee joint, suggesting the diffuse type of PVNS. These findings suggest that the first step in the diagnosis of tuberculous knee arthritis is to have a high index of suspicion. LEVEL OF EVIDENCE: IV.
    Knee Surgery Sports Traumatology Arthroscopy 09/2011; 20(5):937-40. · 2.68 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The purpose of this study was to investigate the use of elbow arthrography for detecting an occult subluxation of the radial head and for verifying the quality of reduction in children with ulnar fractures. The study involved 15 children who underwent closed reduction (with or without percutaneous pinning) based on arthrography for minimally displaced fractures with or without radial head subluxation. The mean age of the patient at the time of surgery was 6 years (range, 3-12 years). Initial diagnoses based on conventional radiographs were compared with arthrographically confirmed final diagnoses in groups of children with ulnar fractures of the olecranon, proximal, and diaphysis. Arthrography confirmed initial radiographic diagnoses in 10 and altered diagnoses in five patients. We conclude that arthrography can be useful for detecting an occult subluxation of the radial head and for evaluating adequate reduction in children of less than 6 years with ulnar fractures.
    Journal of pediatric orthopaedics. Part B / European Paediatric Orthopaedic Society, Pediatric Orthopaedic Society of North America 07/2011; 20(4):257-63. · 0.66 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This matched case-cohort retrospective study examined the effectiveness of shed blood re-transfusion in reducing the need for allogeneic blood transfusion in computer-assisted primary cemented total knee arthroplasty (TKA). The shed blood re-transfusion system used was the cell saver system. Data from 146 cases were analyzed (73 patients with cell saver, 73 patients without cell saver). The ABT rate was similar in each group. The mean allogenic blood transfusion volume was similar for each group (CS=214±453 ml, non-CS=288±447 ml). The only factors correlated with allogenic blood transfusion use were low preoperative hemoglobin and low body mass index. Two patients in cell saver group experienced shivering after re-transfusion. Shed blood re-transfusion provided no blood management benefits in computer-assisted primary TKA and is therefore recommended only for selected patients with low hemoglobin levels and low body mass index.
    Knee Surgery Sports Traumatology Arthroscopy 06/2011; 19(6):926-31. · 2.68 Impact Factor
  • Journal of Orthopaedic Science 05/2011; 17(1):93-7. · 0.96 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Although computer-assisted navigation in total knee arthroplasty (TKA) has many advantages, undetected tracker pin movement can result in poor lower limb alignment and component position. Osteoporosis may be an underlying cause of tracker pin movement. The present prospective case-control study compared 6-month radiographic outcomes in 44 osteoporotic and 56 non-osteoporotic knees undergoing navigation TKAs. Osteoporotic knees were defined as those having a T-score of -2.5 or less either in the femoral neck or lumbar spine or both. At postoperative 6 months' follow-up, the average coronal tibial component position was greater valgus in osteoporotic group than in nonosteoporotic group (non-osteoporotic=varus 0.7°±1.8°; osteoporotic=valgus 1.2°±3.4°; p=0.041). Multiple linear regression analysis showed that being in the osteoporotic group was a predictor of tibial coronal component position (β=0.321, p=0.039). In addition, preoperative lumbar spine bone mineral density was found to be a predictor of coronal and sagittal alignments of the tibial component (β=0.406, p=0.015, β=-0.463, p=0.007). The present study found that osteoporosis affected tibial component position in computer-assisted navigation TKA. Clinicians should be particularly aware of the possibility of undetectable tracker pin movement during navigation TKA in osteoporotic knees.
    The Knee 04/2011; 19(3):203-7. · 2.01 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The influence of soft tissue balancing on femoral component rotation in the gap technique remains unclear. The present study therefore compared the reliability of femoral component rotation determined by rectangular and trapezoidal gaps in total knee arthroplasty (TKA) using a navigation-assisted gap-balancing technique. The study also determined the correlation between femoral component rotation and gap measurement. This prospective study included 99 patients (108 knees) who underwent postoperative CT after TKA with the navigation-assisted gap-balancing technique. A trapezoidal flexion or extension gap was defined as a >3 mm difference between the medial and lateral sides in 90° flexion or extension. An outlier of femoral component rotation was defined as >3° deviation from the transepicondylar axis. Postoperative CT showed that the femoral component had a tendency to rotate externally, with a mean 1.88 ± 2.49° from the surgical transepicondylar axis. Outliers and mean values of femoral component rotation were similar in the trapezoidal and rectangular flexion/extension gap groups. The medial flexion gap (r = -0.49, P = 0.007) and flexion gap differences (r = -0.59, P = 0.027) showed statistically significant negative correlations with the femoral component rotation. Multiple linear regression analysis also showed that the femoral component rotation was independently related to the flexion gap difference (β = -0.27, P = 0.031). In the gap technique, the rotation of the femoral component is affected more by the flexion gap than by the extension gap. However, neither the trapezoidal nor rectangular flexion gap influenced femoral component rotation.
    Knee Surgery Sports Traumatology Arthroscopy 02/2011; 19(7):1141-7. · 2.68 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Trigger finger is frequently treated with tendon sheath injections. This cadaveric study evaluated the accuracy and safety of blind and sonographically guided tendon sheath injections. To our knowledge, a study that precisely mapped the locations of material injected into the tendon sheath has not been reported previously. A total of 40 fingers (excluding thumbs) of 5 fresh cadavers were used. Methylene blue dye was injected into the flexor tendon sheath using either a blind or sonographically guided injection technique (20 fingers for each technique). The location of the dye was then determined via dissection. Dye was observed only in the tendon sheath (ie, optimal outcome) in 70% of sonographically guided injections and 15% of blind injections (P = .001). Dye was observed in the tendon proper (ie, unsafe outcome) in 30% of blind injections and 0% of sonographically guided injections (P = .02). We found that sonographically guided tendon sheath injections were more accurate and may be potentially safer than blind injections. These findings suggest that sonographically guided injections should be considered over blind injections when treating trigger finger.
    Journal of ultrasound in medicine: official journal of the American Institute of Ultrasound in Medicine 02/2011; 30(2):197-203. · 1.40 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A woman presented with knee pain and locking. Pain was exacerbated at the end of the range of motion, especially during extension, with locking symptoms similar to those associated with a meniscus bucket handle tear. Ligamentous laxity was not definite. Plain radiographs showed multiple calcified loose bodies. Magnetic resonance imaging (MRI) showed a lobulated mass that was hypointense to muscle on T1-weighted sequences and hyperintense to muscle on T2-weighted sequences in the anterior cruciate ligament (ACL). Arthroscopically, multiple loose bodies were observed in the intercondylar notch and posterolateral compartment. A huge mass replaced the normal ACL and was caught in the intercondylar notch. The mass in the intercondylar notch caused loss of extension range of motion (ROM) because the piece caused a mechanical blockage. However, the loss of flexion ROM was likely caused by a loss of elasticity of the ligament rather than mechanical blockage. We resected the ACL mass, and removed the free bodies from the posterolateral corner. It was not possible to preserve the ACL fibers. Histological examination confirmed a diagnosis of osteochondromatosis. All symptoms resolved postoperatively. At 20 months postoperatively, the patient was pain free and had regained full knee motion without recurrence evidenced by follow-up MRI. However, ACL removal caused the knee instability. To date the patient has not undergone ACL reconstruction because she prefers conservative treatment and has experienced little discomfort in activities of daily living. To our knowledge, this is the first report to describe synovial osteochondromatosis wholly replacing the ACL fibers and causing mechanical blocking of both extension and flexion.
    Orthopedics 01/2011; 34(2):136. · 1.05 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We present a case of insufficient bilateral femoral subtrochanteric fractures in a patient who was treated with imatinib mesylate, an anticancer drug, for 1 year after a diagnosis of chronic myelogenous leukemia (CML). A 60-year-old woman presented with bilateral thigh pain for 6 months. A plain radiograph revealed bilateral progressive insufficient fractures on the subtrochanteric areas of the femurs. MRI of the femurs revealed incomplete stress fractures and no evidence of bone metastasis on either femur. Bone densitometry showed normal T-scores around the hip joint and spine. The patient had normal serum levels of calcium, vitamin D derivatives, and thyroid hormones. Serum phosphate levels were decreased, and parathyroid hormone levels were increased. Serum osteocalcin and urinary N-telopeptide of collagen cross-links (NTx) were both decreased. A bone biopsy demonstrated normocellular marrow without leukemic cells. A histomorphometric evaluation of her bones revealed reduced bone turnover despite secondary hyperparathyroidism. The serum markers for bone metabolism and histomorphometric evaluations in this patient suggest that the drug may have an effect on bone metabolism. These effects could be seen for both bone formation and resorption: this could result in impaired bone mineralization, a severely suppressed bone turnover rate, insufficient fractures, and bone necrosis, which are sometimes seen with long-term use of bisphosphonates. To our knowledge, this is the first case of an insufficient bilateral femoral shaft fracture that is potentially related to the use of imatinib mesylate in a patient with CML. Careful examination of bone metabolism should be performed in patients with CML because imatinib mesylate treatment is a lifelong process.
    Journal of Bone and Mineral Metabolism 11/2010; 28(6):713-8. · 2.22 Impact Factor

Publication Stats

93 Citations
51.03 Total Impact Points

Institutions

  • 2012–2013
    • Korea University
      • College of Medicine
      Sŏul, Seoul, South Korea
  • 2011
    • Pusan National University
      • Department of Orthopaedic Surgery
      Pusan, Busan, South Korea