1.A comparative study on the accuracy of the devices for measuring the implant stability.
In Ho CHO ; Young Il LEE ; Young Mi KIM
The Journal of Advanced Prosthodontics 2009;1(3):124-128
STATEMENT OF PROBLEM: How the ISQ values measured by Osstell(TM) and Osstell(TM) Mentor are related, and whether the ISQ values acquired from the two machines changes in accordance with changes in implant stability are not yet fully understood. PURPOSE: The aim of this study was to find out correlation between the ISQ values acquired from Osstell(TM) and Osstell(TM) Mentor, and to evaluate the clinical effectiveness and accuracy of two devices. MATERIAL AND METHODS: Sixty two implants were inserted into 47 patients, and their ISQ values were measured using Osstell(TM) and Osstell(TM) Mentor. In the first stage surgery, the ISQ values of forty four implants inserted into thirty five patients were measured. In the second stage surgery, the values of fifty implants inserted into thirty seven patients were measured. The values were analyzed to determine the difference between the mean ISQ values of Osstell(TM) and Osstell(TM) Mentor. In addition, the correlation between implants used in the first and second stage of surgery with regard to their types and areas of insertion were analyzed. The difference between the ISQ values of 32 implants in each patient during the first and second stage was analyzed. The statistical assessment was carried out using SPSS V. 12.0 for Win. (SPSS Inc., Chicago, USA). The Pearson correlation coefficient was used to examine the correlation between Osstell(TM) and Osstell(TM) Mentor in the first and second stages of surgery, whereas the difference between their ISQ values was evaluated using a paired t-test. RESULTS: In the first stage, the mean ISQ value for Osstell(TM) and Osstell(TM) Mentor was 70.84 and 75.09, respectively, showing a significant difference (P < .01). In the second stage, the mean ISQ value of Osstell(TM) and Osstell(TM) Mentor was 71.76 and 75.94, respectively, also showing a significant difference (P < .01). The difference between the ISQ values in patients in the first and the second stages was significant with both instruments. CONCLUSION: The significant difference in the values obtained using the Osstell(TM) and Osstell(TM) Mentor between the first and second stages of implant surgery indicates that these values can be a convenient and precise way for evaluating the implant stability in clinical practice.
Chicago
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Humans
;
Mentors
2.A clinical review of upper gastrointestinal bleeding.
Young Hwan CHO ; Joon Heon JEONG ; Il Dong CHUNG
Journal of the Korean Surgical Society 1991;41(2):159-167
No abstract available.
Hemorrhage*
3.Photoelastic analysis of stress induced by fixed prostheses with rigid or nonrigid connection between natural tooth and osseointegrated implant.
Young Il KIM ; Chae Heon CHUNG ; Kyu Zong CHO
The Journal of Korean Academy of Prosthodontics 1993;31(2):271-300
No abstract available.
Prostheses and Implants*
;
Tooth*
4.HLA-DQA1, HLA-DQB1 & HLA-DRB1 Alleles Distribution in Hepatitis B Vaccine Non-responder.
Il Tae KIM ; Yun Jung CHO ; Young Tae KIM
Korean Journal of Immunology 2000;22(2):81-86
No abstract available.
Alleles*
;
Hepatitis B Vaccines*
;
Hepatitis B*
;
Hepatitis*
;
HLA-DRB1 Chains*
5.A case of congenital nephrotic syndrome associated with renal venous thrombosis.
Sung Yoon CHO ; Sung Ho CHA ; Byoung Soo CHO ; Chang Il AHN ; Jin Il KIM ; Young Tae KO
Korean Journal of Nephrology 1991;10(3):420-425
No abstract available.
Nephrotic Syndrome*
;
Venous Thrombosis*
6.A Case of Kartagener's Syndrome.
Young Jin MIN ; Chang Il AHN ; Sook Kyung CHO ; Jong Dae CHO
Journal of the Korean Pediatric Society 1988;31(11):1522-1526
No abstract available.
Kartagener Syndrome*
7.Conservative Treatment of Anterior Cruciate Ligament Rupture.
Woo Shin CHO ; Sung Il BIN ; Yong Sun CHO ; Young Kil HAN ; Ho In CHA
The Journal of the Korean Orthopaedic Association 1997;32(2):282-287
Between August 1994 and June 1995, seventeen patients diagnosed as having partial or complete ruptures of the anterior cruciate ligament on MRI were managed by non-operative methods. Among them four patients were excluded due to operation during follow-up and the results were evaluated at a one year follow-up. We selected the patients prospectively for non-operative care using the selection criteria of age, degree of instability, activity level and patient compliance. The average age of them was 37.7 years. Initially knee stress test and MRI were checked, and Cybex study and Lysholm knee scoring were done at post-trauma one year follow-up. They were managed conservatively by ROM and muscle strengthening exercises and a brace fitting schedule for three months. Among them, six cases had partial tears and seven had a complete tear initially. At the one year follow-up, five of six cases who had shown partial ruptures, and two of seven cases with complete tears, recovered continuity of the ruptured ACL on MRI. Their Lysholm knee score was 84.4, and the Cybex test showed no difference in muscle power between the injured and uninjuried side. Those patients who had loss of continuity on follow-up MRI showed Lysholm score of 57.4 and decreased muscle power on Cybex study. Although there are still controversies about the adequate management of ACL injuries, our study suggests that conservative management is a viable alternative to surgery as long as the patients are selected prudently. For more concrete results, however, careful analysis based on a longer follow up period is necessary.
Anterior Cruciate Ligament*
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Appointments and Schedules
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Braces
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Exercise
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Exercise Test
;
Follow-Up Studies
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Humans
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Knee
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Magnetic Resonance Imaging
;
Patient Compliance
;
Patient Selection
;
Prospective Studies
;
Rupture*
8.A case of cryptococcal lymphadenitis.
Ho Sung CHO ; Young Baek HAHM ; Il Sin MOON ; Churl Young CHUNG ; Jung Weon SHIM ; Il Hyang KO
Journal of the Korean Pediatric Society 1992;35(1):108-112
No abstract available.
Lymphadenitis*
9.Analysis of periodontal data using mixed effects models.
Journal of Periodontal & Implant Science 2015;45(1):2-7
A fundamental problem in analyzing complex multilevel-structured periodontal data is the violation of independency among the observations, which is an assumption in traditional statistical models (e.g., analysis of variance and ordinary least squares regression). In many cases, aggregation (i.e., mean or sum scores) has been employed to overcome this problem. However, the aggregation approach still exhibits certain limitations, such as a loss of power and detailed information, no cross-level relationship analysis, and the potential for creating an ecological fallacy. In order to handle multilevel-structured data appropriately, mixed effects models have been introduced and employed in dental research using periodontal data. The use of mixed effects models might account for the potential bias due to the violation of the independency assumption as well as provide accurate estimates.
Bias (Epidemiology)
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Data Interpretation, Statistical
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Dental Research
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Least-Squares Analysis
;
Linear Models
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Models, Statistical
10.Lymphokine-activated killer(LAK) cell activity in tumor-transplanted mice(II).
Sang Yun NAM ; Yun Tai LEE ; Young Il KIM ; Si Young KIM ; Kyung Sam CHO
Journal of the Korean Cancer Association 1992;24(3):365-377
No abstract available.