2.Is Age a Factor in Diagnosis and Treatment for Superior Labral Anterior to Posterior (SLAP) Lesion?.
Clinics in Shoulder and Elbow 2015;18(1):1-1
No abstract available.
Diagnosis*
3.Effectiveness of the Anti-adhesive Agent Protescal after Arthroscopic Rotator Cuff Repair: A Retrospective Study.
Pill Ku CHUNG ; Jae Chul YOO ; Jeung Yeol JEONG
Clinics in Shoulder and Elbow 2017;20(1):3-9
BACKGROUND: Many hyaluronic acid (HA)-based anti-adhesive agents have been commercialized for clinical use in the pharmaceutical market. But their efficacy in arthroscopic rotator cuff repairs remains elusive. To determine their efficacy, we performed a comparative analysis of the effects of two hyaluronate/carboxymethylcellulose (CMC)-based anti-adhesive agents, Protescal and Guardix. METHODS: We recruited a total of 256 patients who had received an arthroscopic rotator cuff repair at our hospital between January 2014 and March 2015. Among them, 96 patients fulfilled the study's selection criteria and were enrolled as the final population sample. Thirty patients who had received a postoperative injection of Protescal were allocated into Group A. Another 30 patients who had received a postoperative injection of Guardix were allocated into Group B. As controls, 36 patients who did not receive any injection were allocated into Group C. The patients included in this study were aged between 19 and 75 years. For the clinical assessment, we measured the following clinical parameters—the visual analogue scale for pain (PVAS), the American Shoulder and Elbow Surgeons (ASES) score, and the constant score, as well as passive range of motions (ROMs)—at three time-points (preoperatively, 2-month postoperatively, and 6-month postoperatively). RESULTS: We found that Group A compared to Group B tended to show a swifter recovery in passive anterior elevation and in internal rotation by the 2-month postoperative follow-up, but the differences were not statistically significant. CONCLUSIONS: We found that the effects of HA/CMC-based injections were minimal after arthroscopic rotator cuff repairs.
Elbow
;
Follow-Up Studies
;
Humans
;
Hyaluronic Acid
;
Patient Selection
;
Retrospective Studies*
;
Rotator Cuff*
;
Shoulder
;
Surgeons
4.Culture of Nail Matrix Cells.
Jae Hak YOO ; Hee Chul EUN ; Yoon Ho LEE
Annals of Dermatology 1997;9(4):242-245
BACKGROUND: In vitro epidermal keratinocytes(EKs) culture systems are widely used in studying skin biology and differentiation. Recently a monolayer culture method of nail matrix cells(NMCs) has been developed. OBJECTIVE: This study was designed to establish a method of culture of NMCs and compared its characteristics with those of EKs. METHODS: Human NMCs were isolated and cultured in a defined medium. Phase contrast microscopic examination, growth rate and ketatin expression were evaluated. RESULTS: In in vitro monolayer culture, NMCs had a similar growth pattern and morphological features as EKs. The synthesis of hard keratins was detected. CONCLUSION: These observations suggest that the NMCs culture model may be useful for the study of nail properties and the effects of drugs.
Biology
;
Humans
;
In Vitro Techniques
;
Methods
;
Skin
5.Effects of Several Antifungal Agents on Cultured Human Nail Matrix Cells and Epidermal Keratinocytes.
Jae Hak YOO ; Jin Ho CHUNG ; Hee Chul EUN
Korean Journal of Dermatology 1998;36(3):415-421
BACKGROUND: Long-term oral itraconazole and terbinafine are widely used in the treatment of onychomycosis. Accelerated nail growth in patients with itraconazole has been described in several reports. However, there has been no report regarding the effect of antifungal agents on cultured nail matrix cells(NMCs). OBJECTIVE: We applied several antifungal agents on cultured human NMCs and epidermal kera- tinocytes(EKs) to compare the cytotoxicity of several antifungal agents and also to verify possible stimulating effects of itraconazole and 6-hydroxyitraconazole on nail growth. METHODS: To evaluate the effect of antifungal agents, the 3-(4,5-dimethylthiazo1-2-yl) 2,5-diphenyl- tetrazolium bromide(MTT) test, tritiated thymidine incorporation test, and lactic dehydrogenase(LDH) leakage test were used. RESULTS: Dose dependent decreases in cell viability and DNA synthesis, and dose dependent increases in LDH liberation were observed in cultured human NMCs and EKs after exposure to several antifungal agents. The dose-response reaction patterns for NMCs and EKs to antifungal agents were similar. The cytotoxicity potency of several antifungal agents measured by each method were slightly different. Itraconazole and 6-hydroxyitraconazole did not show stimulating effects on cell proliferation in in vitro monolayer cell culture systems. CONCLUSION: These observations suggest that itraconazole appeared less cytotoxic but showed no stimulating effects on nail matrix cell proliferation in vitro. Cultured human EKs as well as NMCs may be useful in evaluating the effects of agents which are involved in nails.
Antifungal Agents*
;
Cell Culture Techniques
;
Cell Proliferation
;
Cell Survival
;
DNA
;
Humans*
;
Itraconazole
;
Keratinocytes*
;
Onychomycosis
;
Thymidine
6.Longitudinal Supraspinatus Tear Associated with Antegrade Humeral Intramedullary Nailing: A Case Report and Literature Review with Focus Placed on Nail Entry Point.
Min Soo SHON ; Tae Jung BANG ; Jae Chul YOO
Clinics in Shoulder and Elbow 2015;18(1):47-51
Iatrogenic damage of the rotator cuff followed by postoperative shoulder function loss is a potential complication after antegrade intramedullary nailing (AIN) for a humeral fracture. The authors present a case of arthroscopic rotator cuff repair and subacromial decompression of a non-healed rotator cuff tendon (mainly supraspinatus) and secondary impingement syndrome caused either by the tear or a proud nail after AIN for a mid-shaft humeral fracture. At presentation, the patient complained of right shoulder pain and 'snapping', especially during forward elevation and abduction of the shoulder, of 4 years duration. Right shoulder pain started sometime after pain due to the humeral shaft fracture, operation had subsided, and persisted after nail removal. Arthroscopic findings showed a longitudinal rotator cuff tear at the nail entry point that had not healed and severe fibrous hypertrophy on the acromion underspace, which is a unique finding since most longitudinal splits of tendon fibers are more likely to heal than conventional rotator cuff tears detached from bone. The torn rotator cuff was repaired after debridement and placing side-to-side sutures. At his 34-month follow-up after rotator cuff repair, the patient showed complete recovery and had excellent clinical scores.
Acromion
;
Arthroscopy
;
Debridement
;
Decompression
;
Follow-Up Studies
;
Fracture Fixation, Intramedullary*
;
Humans
;
Humeral Fractures
;
Hypertrophy
;
Rotator Cuff
;
Shoulder
;
Shoulder Pain
;
Sutures
;
Tendons
7.Bony lesions of professional divers in Korea.
Myung Chul YOO ; Yoon Jae CHO ; Sang Gweon LEE
The Journal of the Korean Orthopaedic Association 1992;27(1):331-340
No abstract available.
Korea*
8.Legg-Calve-Perthes Disease
Myung Chul YOO ; Byung Ho KIM ; Jae Yong AHN
The Journal of the Korean Orthopaedic Association 1987;22(1):73-84
237 patients with Legg-Calve-Perthes disease were treated during past 12 years. Among them, a comparative study was done for 87 patients who were followed up over 2 years. They were analyzed according to Catteralls classification and divided into a group of conservative treatment and of surgical treatment. 74 patients were boys and 13 patients were girls and the ratio of boys to girls was 5.7 to 1. The mean age was about 6.9-year-old. Bilateral involvement was observed in 6 patients. According to Catterall classification. 1(1.1%) was classified as group I, 27(29.0%) as group II, and 36(38.7%) as group III, and 29(31.2%) as group IV. According to assessment by Harrison et al., satisfactory result was achieved in 63.2% of cases of conservative treatment and 34.3% of cases of operative treatment. The measurement of epiphyseal quotient and femoral head sphericity(by Mose) were considered meaningful methods for assessing the result of the treatment. The most frequent one of “Head-at-Risk” factors was lateral subluxation of femoral head. The result of treatment was not always coincided with the classification by Catterall. In bilateral involvement, the first affected hip had better prognosis than contralateral one.
Classification
;
Female
;
Head
;
Hip
;
Humans
;
Legg-Calve-Perthes Disease
;
Prognosis
9.Congenital Pseudarthrosisof the Tibia: Treated with Free Vascularized Fibular Graft
Myung Chul YOO ; Shin Hyeok KANG ; Bong Keon KIM ; Jae Gong PARK ; Hong Chul LIM
The Journal of the Korean Orthopaedic Association 1981;16(3):745-752
It is notoriously difficult to obtain a sound bony union of congenital paeudarthrosis of tbe tibia with conventional methods. This paper is the results of using the free vascularized fibular graft for congenital pseudarthorsis of the tibia in 7 patients since 1978 in this hospital, which is the first attempt in Korea. During the follow-up periods from 9 months to 32 months, 5/7 patients(71%) had good or excellent bony union, 2 patients had bone resorption at tbe distal site of grafted bone and required a second supplementary cancellous bone graft with electrode insertion. So it is thought that the free vascularized fibular graft is one of good methods of treatment for congenital pseudarthrosis of the tibia.
Bone Resorption
;
Electrodes
;
Follow-Up Studies
;
Humans
;
Korea
;
Pseudarthrosis
;
Tibia
;
Transplants
10.A Case of Hemolyic Disease of Newborn Caused by Anti-c and Anti-E Antibody.
Chul Hong KIM ; Hwang Jae YOO ; Ik Jin SONG ; Jae Hong PARK ; Young Tak YIM
Korean Journal of Perinatology 1997;8(4):433-436
Hemolytic disease of newborn due to Rhesus incompatibility occurs mostly by anti-Rh(D) antibodies. But recently, because of Rh(D) immune globuin prophylaxis, Rh(D) incompatibility is decreased and importance of minor group incompatibility is increasing. The majority of minor blood group incompatibilities are anti-c, anti-E or anti-Kell, but hemolytic diseases caused by combination of these antibodies are relatively rare. The 21 day-old male neonate was admitted because of pallor and poor feeding for 2 days. Laboratory data showed severe normochromic and normocytic anemia with increased reticulocyte and bilirubin. Patient's and his mothers blood type was B, Rh(D) positive. Minor blood groups of mother's and sons were different and anti-c and anti-E antibody were detected in mother's serum. After transfusions of two times with anti-c and anti-E free B, Rh(D) positive blood, the baby was discharged at 11th hospital day with good general condition.
Anemia
;
Antibodies
;
Bilirubin
;
Blood Group Antigens
;
Blood Group Incompatibility
;
Erythroblastosis, Fetal
;
Humans
;
Infant, Newborn*
;
Male
;
Mothers
;
Pallor
;
Reticulocytes