1.Comparison of shaping ability of rotary Ni-Ti file systems used by undergraduates.
Mun Seong KANG ; Hyeon Cheol KIM ; Bock HUR ; Jeong Kil PARK
Journal of Korean Academy of Conservative Dentistry 2006;31(1):1-10
The purpose of this study was to compare the shaping ability of three Ni-Ti file systems used by dental students or the experts and consequently to aid in choosing a proper systems for educational courses of dental students and beginners. Fifty students and ten dentists who have clinical experience over two years prepared 180 simulated root canals in resin blocks with three Ni-Ti systems; ProFile(R) (PF), HeroShaper(R) (HS), K3TM (K3). After preparation, the Ni-Ti files were evaluated for distortion and canal preparation time was recorded. The images of pre- and post-instrumented canals were scanned and superimposed. Amounts of increased canal widths, deviation, and centering ratio were calculated at apical 1, 3 and 5 mm levels and statistical analysis was performed. The results were as follows: 1. HS showed the shortest preparation time and instrumented canal width in K3 was significantly larger than other groups (P < 0.05). 2. At 1 and 3 mm levels, all groups had outward deviation. In student group, at the 1 mm level, PF had the least deviation (P < 0.05). 3. In the centering ratio, the PF had the best centering ability compared to the others at 5 mm level. At 1 and 3 mm levels, HS and PF had better abilities than K3. Student group had better ratio than the expert at 3 mm level with PF (P < 0.05). Based on the results, it is surmised that the ProFile(R) is the safest and most ideal instrument for students and beginners.
Dental Pulp Cavity
;
Dentists
;
Humans
;
Students, Dental
2.Medial Meniscal Root Repair Using Curved Guide and Soft Suture Anchor.
Su Keon LEE ; Bong Seok YANG ; Byeong Mun PARK ; Ji Ung YEOM ; Ji Hyeon KIM ; Jeong Seok YU
Clinics in Orthopedic Surgery 2018;10(1):111-115
Medial meniscal root tears have been repaired using various methods. Arthroscopic all-inside repair using a suture anchor is one of the popular methods. However, insertion of the suture anchor into the proper position at the posterior root of the medial meniscus is technically difficult. Some methods have been reported to facilitate suture anchor insertion through a high posteromedial portal, a posterior trans-septal portal, or a medial quadriceptal portal. Nevertheless, many surgeons still have difficulty during anchor insertion. We introduce a technical tip for easy suture anchor insertion using a 25° curved guide and a soft suture anchor through a routine posteromedial portal.
Menisci, Tibial
;
Surgeons
;
Suture Anchors*
;
Sutures*
;
Tears
3.A Severe Thrombocytopenia Associated with Cyclosporine-Dependent Antiplatelet Antibody Against Platelet Glycoproteins Ib/IX and IIb/IIIa Complexes.
Kwang Il PARK ; Hea Jung SHIN ; Mun Jeong KIM ; Quehn PARK ; Hyun Ok KIM ; Kyung Soon SONG ; Hyeon Joo JEONG
Korean Journal of Clinical Pathology 1998;18(3):464-468
A 51 year-old woman underwent living related renal transplantation under cyclosporine A immunosuppression. After surgery, she did well initially, but the serum creatinine level subsequently rose to 3.6 mg/dL on postoperative day 95, she was admitted at Severance Hospital for further evaluation. On admission day 4, a renal biopsy was performed, and the microscopic findings revealed an interstitial mononuclear cell infiltrate, suggestive of severe allograft rejection. Because of persistently impaired renal function, the patient was began on twice weekly hemodialysis, and the progression of renal deterioration paralleled the onset of a thrombocytopenia. The platelet count dropped to 13x109/L despite daily platelet transfusion. On admission day 19, antiplatelet antibody against the glycoprotein Ib/IX (GP Ib/IX) and glycoprotein IIb/IIIa (GP IIb/IIIa) complex was detected in the presence of cyclosporine A (CsA) with modified antigen capture ELISA (MACE) assay, thereby implicating the drug. CsA was stopped immediately and immunosuppression drug was changed to FK506. After CsA was discontinued 7 day later, her platelet count returned to normal, up to 170x109/L without requirement of any platelet concentrates. This paper presents the first case of CsA induced thrombocytopenia in Korea which was confirmed by in vitro CsA dependent antiplatelet antibody detection test.
Allografts
;
Biopsy
;
Blood Platelets*
;
Creatinine
;
Cyclosporine
;
Enzyme-Linked Immunosorbent Assay
;
Female
;
Glycoproteins
;
Humans
;
Immunosuppression
;
Kidney Transplantation
;
Korea
;
Middle Aged
;
Platelet Count
;
Platelet Membrane Glycoproteins*
;
Platelet Transfusion
;
Renal Dialysis
;
Tacrolimus
;
Thrombocytopenia*
4.Sequential Clomiphene Citrate and FSH compared to Clomiphene Citrate and hMGon Pregnancy Rate in Intrauterine Insemination Cycles.
Goo Sung JUNG ; Ki Eon HONG ; Seung Hwan YOU ; Hyeon Sook LEE ; Jong In LEE ; Young Mun HUR ; Eun Suk JEON ; Jeong Im YOON ; Jeong Eui HONG ; Ji Sam LEE
Korean Journal of Fertility and Sterility 1999;26(3):433-440
OBJECTIVE: To evaluate the effectiveness of CC+FSH or CC+hMG in intrauterine insemination (IUI) cycles for the treatment of infertility. METHOD: Patients received daily 100 mg of clomiphene citrate (CC) for 5 days followed by hMG or FSH. A single IUI was performed at 36 h after hCG. Clinical pregnancy was classified if a gestational sac or fetal cardiac activity was seen on ultrasound. RESULTS: The overall clinical pregnancy rate was 19.1% per cycle (17/89) and 21.5% per patient (17/79). More clinical pregnancies were recorded in CC+FSH (23.1%, 6/26) than CC+hMG cycles (17.5%, 11/63), but this difference was not statistically significant. No differences were found in age, duration of infertility, follicle size, levels of estradiol (E2) on the day of hCG injection and total motile sperm counts between pregnant and non-pregnant groups. However, more ampules of gonadotropins were used in pregnant group than non-pregnant group (p<0.05). CONCLUSION: Combination of CC and hMG may economically be more effective to induce ovulation for IUI compared to CC and FSH.
Clomiphene*
;
Estradiol
;
Female
;
Gestational Sac
;
Gonadotropins
;
Humans
;
Infertility
;
Insemination*
;
Ovulation
;
Pregnancy Rate*
;
Pregnancy*
;
Sperm Count
;
Ultrasonography
5.Comparison of Pregnancy Rates by Intrauterine Insemination after Ovulation Trigger with Endogenous LH Surge, GnRH Agonist or hCG in Stimulated Cycles.
Jong In LEE ; Young Mun HUR ; Eun Suk JEON ; Jeong Im YOON ; Goo Sung JUNG ; Ki Eon HONG ; Seung Hwan YOU ; Hyeon Sook LEE ; Jeong Eui HONG ; Ji Sam LEE
Korean Journal of Fertility and Sterility 1999;26(3):389-398
OBJECTIVE: This study was designed to evaluate the effects of endogenous LH surge, GnRH agonist (GnRH-a) or human chorionic gonadotropin (hCG) as ovulation trigger on pregnancy rate by intrauterine insemination (IUI). METHOD: Patients received daily 100 mg of clomiphene citrate (CC) for 5 days stating on the third day of the menstrual cycle followed by human menopausal gonadotropin (hMG) for ovulation induction. Follicles larger than >16 mm in diameter were present in the ovary, frequent LH tests in urine were introduced to detect an endogenous LH surge. Final follicular maturation and ovulation were induced by GnRH-a 0.1 mg (s.c.) or hCG 5,000~10,000 IU (i.m.) administration except natural ovulation. Pregnancy was classified as clinical if a gestational sac or fetal cardiac activity was seen on ultrasound. RESULTS: There were no differences in age, duration of infertility and follicle size, but more ampules of hMG were used in GnRH-a group compared to hCG 10,000 IU treated group (p<0.05). Lower level of estradiol (E2) on the day of hCG or GnRH-a injection was observed in hCG 10,000 IU group than other treatment groups (p<0.01). The overall clinical pregnancy rate was 19.8% per cycle (32/162) and 22.2% per patient (32/144). Pregnancy rate was higher in natural-endogenous LH surge group (37.5%, 9/24) than GnRH-a (18.8%) or hCG treated group (20.9% & 13.9%), but this difference was not statistically significant. No patient developed ovarian hyperstimulation. Abortion rate was 22.2% (2/9) in hCG 5,000 IU group. Delivery or ongoing pregnancy rate was 37.5% (9/24), 18.8% (3/16), 16.3% (7/43) and 13.9% (11/79) in endogenous LH surge, GnRH-a, hCG 5,000 IU and hCG 10,000 IU treatment groups, respectively. CONCLUSION: These results support the concept that use of natural-endogenous LH surge in stimulated cycles may be more effective to obtain pregnancies by IUI than GnRH-a or hCG administration.
Abortion, Induced
;
Chorionic Gonadotropin
;
Clomiphene
;
Estradiol
;
Female
;
Gestational Sac
;
Gonadotropin-Releasing Hormone*
;
Gonadotropins
;
Humans
;
Infertility
;
Insemination*
;
Menstrual Cycle
;
Ovary
;
Ovulation Induction
;
Ovulation*
;
Pregnancy Rate*
;
Pregnancy*
;
Ultrasonography
6.Outcomes of Ultrasound-Guided Extracorporeal Shock Wave Therapy for Painful Stump Neuroma.
Yun Jae JUNG ; Won Yong PARK ; Jong Hyun JEON ; Jeong Hyeon MUN ; Yoon Soo CHO ; Ah Young JUN ; Ki Un JANG ; Cheong Hoon SEO
Annals of Rehabilitation Medicine 2014;38(4):523-533
OBJECTIVE: To investigate the effect of extracorporeal shock wave therapy (ESWT) on painful stump neuroma. METHODS: Thirty patients with stump neuroma at the distal end of an amputation site were assigned randomly to the ESWT group (n=15) and the transcutaneous electrical nerve stimulation (TENS)+desensitization+pharmacological treatment group (n=15). For 3 weeks, the ESWT group received a weekly session involving 1,500 pulses at 0.10 mJ/mm2, while the control group was treated 10 times each, 40 minutes per day with TENS and desensitization treatment, and daily medication for 3 weeks. ESWT stimulation was given by focusing on the area at the neuroma site clearly identified by ultrasound. RESULTS: The changes in the McGill pain questionnaire were 38.8+/-9.0 prior to treatment and 11.8+/-3.1 following the treatment. The corresponding values for the control group were 37.2+/-7.7 and 28.5+/-10.3. The changes between groups were significantly different (p=0.035). The change in visual analog scale prior to and after treatment was 7.0+/-1.5 and 2.8+/-0.8 in the ESWT group, respectively, and 7.2+/-1.4 and 5.8+/-2.0 in the control group. These changes between the groups were also significantly different (p=0.010). The outcome in the pain rating scale also showed significant differences between groups (p<0.001). Changes in neuroma size and pain pressure threshold (lb/cm2) were not significantly different between groups (p>0.05). CONCLUSION: The study findings imply that ESWT for stump neuroma is superior to conventional therapy.
Amputation
;
Amputation Stumps
;
Humans
;
Neuroma*
;
Pain Measurement
;
Shock*
;
Transcutaneous Electric Nerve Stimulation
;
Ultrasonography
;
Visual Analog Scale
7.Intra-articular Injection of Hyaluronic Acid to Rehabilitate Post-burn Elbow Contracture.
Ji Soo CHOI ; Jeong Hyeon MUN ; Jong Hyun JEON ; Yun Jae JUNG ; Cheong Hoon SEO ; Ki Un JANG
Journal of Korean Burn Society 2011;14(2):118-121
PURPOSE: Limitation of motion of the elbow joint causes upper extremity dysfunction and limitation in activities of daily living. Hyaluronic acid (HA) is a glycosaminoglycan (GAG), which is a substance that attaches to collagen and elastin to form cartilage. HA not only helps keep the cartilage that cushions joints strong and flexible, but also helps to increase supplies of joint-lubricating synovial fluid. We investigated the effect of intraarticularly applied HA on the post-burn contracture of the elbow. METHODS: Total 14 patients were randomized into HA and control groups. The treatment group who treated with HA intra-articular injection once a week for 3 times. A control group was not injected. The effect of HA injection was evaluated by range of motion (ROM) of elbow, grip strength, patient's visual analogue scale (VAS) of pain and functional independence measure (FIM) scale before the first injection as well as after 1 and 3 months. RESULTS: The change in elbow flexion ROM was 29.2+/-19 for HA vs 1.4+/-2.4 for control (P<0.05). The change in VAS pain was 2.9+/-1.3 for HA vs 1+/-1.3 for control (P<0.05). These beneficial effects of HA are sustained for 3 months. There was no significant difference in elbow extension, supination, pronation, grip strength and FIM score. CONCLUSION: As a result, intra-articular injection of hyaluronic acid is effective for the treatment of post-burn contracture of the elbow.
Activities of Daily Living
;
Burns
;
Cartilage
;
Collagen
;
Contracture
;
Elastin
;
Elbow
;
Elbow Joint
;
Equipment and Supplies
;
Hand Strength
;
Humans
;
Hyaluronic Acid
;
Injections, Intra-Articular
;
Joints
;
Pronation
;
Range of Motion, Articular
;
Supination
;
Synovial Fluid
;
Upper Extremity
8.Myoelectric Hand Rehabilitation in the Bilateral Upper Extremity Amputee of Burn Patients: Two Cases Report.
Yun Jae JUNG ; Won Yong PARK ; Jeong Hyeon MUN ; Jong Hyun JEON ; Ju Youn LEE ; Ki Un JANG ; Cheong Hoon SEO
Journal of Korean Burn Society 2012;15(2):137-141
Bilateral upper extremity amputee is rare and also complex, difficult process to apply the prosthesis to daily life. In Korea, there is no case report of bilateral myoelectric hand training, which is installed to bilateral upper extremity amputee due to electrical burn. We present usual 2 cases, who underwent bilateral transradial amputee, were fitted with a bilateral myoelectric prosthetic hand with an adaptive grip. It's not just long-term issues like the prosthesis prescription, but it is important functional problem whether or not to use actually. Especially the unique features of hand grasp function and writing can be the scale that measure recovery of the patient. The development of modern science and technology applications in clinical medicine cause the innovation of a prosthetic hand. In our two cases, good acceptance and functional improvement were noted. The information obtained in this case would be expected to be helpful in the bilateral amputee prosthetic prescription and training for their welfare.
Amputees
;
Burns
;
Clinical Medicine
;
Hand
;
Hand Strength
;
Humans
;
Korea
;
Prescriptions
;
Prostheses and Implants
;
Upper Extremity
;
Writing
9.Effects of Modified Dynamic Metacarpophalangeal Joint Flexion Orthoses after Hand Burn.
Ji Soo CHOI ; Jeong Hyeon MUN ; Ju Youn LEE ; Jong Hyun JEON ; Yun Jae JUNG ; Cheong Hoon SEO ; Ki Un JANG
Annals of Rehabilitation Medicine 2011;35(6):880-886
OBJECTIVE: To assess the effectiveness of modified dynamic metacarpophalangeal joint flexion orthoses for treatment of post-burn hand contractures. METHOD: We enrolled 42 hand burn patients with limited range of motion at the metacarpophalangeal joints in this study. The patients were randomly assigned into either a control or an orthotic group. Both groups received the standard rehabilitation therapy focused on hand therapy; 21 subjects in the orthotic group wore a splint for 3 hours per day for 8 weeks. Hand function was measured by active range of motion, grip strength and other assessment tools. All parameters were estimated using the Mann-Whitney U test at the beginning and the end of the treatment after 8 weeks. RESULTS: The 21 subjects that had an orthotic intervention showed significant improvement in the range of motion at 2nd, 3rd, 4th and 5th metacarpophalangeal joints (p<0.05). However, the grip strength was not significantly increased after the 8 weeks of treatment compared to control group (p>0.05). There was a significant difference in the hand function scales between the 2 groups (p<0.05). CONCLUSION: The modified dynamic metacarpophalangeal joint flexion orthoses provide continuous flexion to metacarpophalangeal joint that is needed for the restoration of range of motion in post-burn hand contractures. For the clinical application of hand orthoses in patients with hand disorders, additional research into its affects are required.
Burns
;
Contracture
;
Hand
;
Hand Deformities
;
Hand Strength
;
Humans
;
Metacarpophalangeal Joint
;
Orthotic Devices
;
Range of Motion, Articular
;
Splints
;
Weights and Measures
10.Correlations of Dynamic Contrast-Enhanced Magnetic Resonance Imaging with Morphologic, Angiogenic, and Molecular Prognostic Factors in Rectal Cancer.
Hye Suk HONG ; Se Hoon KIM ; Hae Jeong PARK ; Mi Suk PARK ; Ki Whang KIM ; Won Ho KIM ; Nam Kyu KIM ; Jae Mun LEE ; Hyeon Je CHO
Yonsei Medical Journal 2013;54(1):123-130
PURPOSE: To investigate the correlations between parameters of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and prognostic factors in rectal cancer. MATERIALS AND METHODS: We studied 29 patients with rectal cancer who underwent gadolinium contrast-enhanced, T1-weighted DCE-MRI with a three Tesla scanner prior to surgery. Signal intensity on DCE-MRI was independently measured by two observers to examine reproducibility. A time-signal intensity curve was generated, from which four semiquantitative parameters were calculated: steepest slope (SLP), time to peak (Tp), relative enhancement during a rapid rise (Erise), and maximal enhancement (Emax). Morphologic prognostic factors including T stage, N stage, and histologic grade were identified. Tumor angiogenesis was evaluated in terms of microvessel count (MVC) and microvessel area (MVA) by morphometric study. As molecular factors, the mutation status of the K-ras oncogene and microsatellite instability were assessed. DCE-MRI parameters were correlated with each prognostic factor using bivariate correlation analysis. A p-value of <0.05 was considered significant. RESULTS: Erise was significantly correlated with N stage (r=-0.387 and -0.393, respectively, for two independent data), and Tp was significantly correlated with histologic grade (r=0.466 and 0.489, respectively). MVA was significantly correlated with SLP (r=-0.532 and -0.535, respectively) and Erise (r=-0.511 and -0.446, respectively). MVC was significantly correlated with Emax (r=-0.435 and -0.386, respectively). No significant correlations were found between DCE-MRI parameters and T stage, K-ras mutation, or microsatellite instability. CONCLUSION: DCE-MRI may provide useful prognostic information in terms of histologic differentiation and angiogenesis in rectal cancer.
Adult
;
Aged
;
Aged, 80 and over
;
Cell Differentiation
;
Contrast Media/*pharmacology
;
DNA Mutational Analysis
;
Female
;
Gadolinium/pharmacology
;
Genes, ras
;
Humans
;
Magnetic Resonance Imaging/*methods
;
Male
;
Microcirculation
;
Microsatellite Instability
;
Middle Aged
;
Neoplasm Staging
;
Neovascularization, Pathologic
;
Prognosis
;
Rectal Neoplasms/*diagnosis/genetics/*pathology
;
Retrospective Studies
;
Time Factors