• Annals of Coloproctology
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• 제34권6호
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• pp.292-298
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• 2018

Purpose: This study compared the perioperative clinical outcomes of reduced-port laparoscopic surgery (RPLS) with those of conventional multiport laparoscopic surgery (MPLS) for patients with sigmoid colon cancer and investigated the safety and feasibility of RPLS performed by 1 surgeon and 1 camera operator. Methods: From the beginning of 2010 until the end of 2014, 605 patients underwent a colectomy for sigmoid colon cancer. We compared the characteristics, postoperative outcomes, and pathologic results for the patients who underwent RPLS and for the patients who underwent MPLS. We also compared the clinical outcomes of single-incision laparoscopic surgery (SILS) and 3-port laparoscopic surgery. Results: Of the 115 patients in the RPLS group, 59 underwent SILS and 56 underwent 3-port laparoscopic surgery. The MPLS group included 490 patients. The RPLS group had shorter operating time ($137.4{\pm}43.2minutes$ vs. $155.5{\pm}47.9minutes$, P < 0.001) and shorter incision length ($5.3{\pm}2.2cm$ vs. $7.8{\pm}1.2cm$, P < 0.001) than the MPLS group. In analyses of SILS and 3-port laparoscopic surgery, the SILS group showed younger age, longer operating time, and shorter incision length than the 3-port surgery group and exhibited a more advanced T stage, more lymphatic invasion, and larger tumor size. Conclusion: RPLS performed by 1 surgeon and 1 camera operator appears to be a feasible and safe surgical option for the treatment of patients with sigmoid colon cancer, showing comparable clinical outcomes with shorter operation time and shorter incision length than MPLS. SILS can be applied to patients with favorable tumor characteristics.

• 대한디지털의료영상학회논문지
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• 제15권2호
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• pp.1-6
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• 2013

This study is to provide clinical data when reverse-water's-view was carried out about pediatric who did not communicate by applying self-development jaw lift tool. This study were conducted in a subject of 23 children who examined revers-water's-view from 2013 July 6 to 2013 August 5 at our hospital. Two group time which were carried out revers-water's with tool and without tool were measured. also, Image of two group were evaluated. Evaluation data obtained by measuring the average difference were analyzed by independent-t-test. After apply self-development-jaw-lift-tool, time was reduced by 35.2%(36.6sec). the results indicated significant differences(p< .05). Image evaluation was increase 43.5%(1.03point), It was statistically highly significant difference (p< .01). If apply self-development-jaw-lift-tool in pediatric revers-water's-view, operator can provide fast, convenience, high quality image to pediatric.

• 대한영양사협회학술지
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• 제12권2호
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• pp.185-199
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• 2006

The purpose of this study was to estimate the sites providing accurate and useful informations to the public by monitoring food and nutrition informations distributed through the internet quantitatively about 13 items of 7 necessary requisites. Total of 457 internet sites on the searching engines of Yahoo, Empas, Nate, Naver and Daum were monitored by 10 panels from May, 2004 to October. Thirty eight % of the sites got 7 & 8 total of 14 points and total sites showed a normal distribution. From the estimation of meta data, individual sites(5.19) were operated insufficiently compared with the commercial sites(6.10) and institutional sites(6.60) (p<0.000). According to administrators, sites were evaluated in the order of research institute> government organization> academic association> pharmaceutical company, club, food company, university> hospital> individual (p<0.000). While low-ranked sites were lack of authority because they didn't show the information provider and source, high-ranked ones lack of sustainable management(updating informations) and security. From this study, we suggest that 1) theme, contents and design have to prepared with variety to suit the need of target clients instead of that of site operator; 2) source and origin of information have to be provided; 3) informations have to be updated often and site to be managed sustainably.

• 대한수학회보
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• 제53권3호
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• pp.885-902
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• 2016

In this paper we begin the study of $L_k$-2-type hypersurfaces of a hypersphere ${\mathbb{S}}^{n+1}{\subset}{\mathbb{R}}^{n+2}$ for $k{\geq}1$ Let ${\psi}:M^3{\rightarrow}{\mathbb{S}}^4$ be an orientable $H_k$-hypersurface, which is not an open portion of a hypersphere. Then $M^3$ is of $L_k$-2-type if and only if $M^3$ is a Clifford tori ${\mathbb{S}}^1(r_1){\times}{\mathbb{S}}^2(r_2)$, $r^2_1+r^2_2=1$, for appropriate radii, or a tube $T^r(V^2)$ of appropriate constant radius r around the Veronese embedding of the real projective plane ${\mathbb{R}}P^2({\sqrt{3}})$.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2753-2755
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• 2003

Overhead crane must do to control occurrence of Anti-Sway according to work situation that is used in case move industry spot's heavy freight, and do safe transfer of freight. Transfer process that make use of crane suspends and consist of series action that put down freight to do relevant addition decreasing the speed before objective while move by schedule section equal speed because increasing the speed after lift thing. This need skill degree by experience because there are operator's function and affinity. Also, must control this effectively because can affect big productivity elevation according to effect that get in transfer of safe freight, Therefore, illuminate physical characteristic of crane and algorithm of motor drive department and there is purpose of this research to do so that correct control may be available through over head crane's shaking control and position control designing LQ controller.

• Nonlinear Functional Analysis and Applications
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• 제27권1호
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• pp.99-110
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• 2022

The main object of this paper is to provide necessary and sufficient conditions for the generalized Struve functions of first kind to be in the classes 𝒮(k, λ) and 𝒞(k, λ). Furthermore, we give conditions for the integral operator 𝓛(m, c, z) = ∫^z₀(2 - u_p(t))dt to be in the class 𝒞^*(k, λ). Several corollaries and consequences of the main results are also considered.

• Journal of Dental Anesthesia and Pain Medicine
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• 제22권5호
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• pp.377-385
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• 2022

Background: Postoperative endodontic pain is an enigma for the dentist. This study aimed to evaluate the analgesic effect of 300 mg gabapentin or 75 mg pregabalin in reducing postoperative endodontic pain compared with a placebo. Methods: Ninety patients who needed root canal treatment with an initial numerical rating scale (NRS) pain score of > 4 (T0) were randomly divided into three groups (n=30). Patients were then administered either 300 mg gabapentin (group A), 75 mg pregabalin (group B), or a placebo (group C) 30 min prior to the start of endodontic treatment. A single operator performed single-visit endodontics, and pain was evaluated immediately after endodontic treatment (T1) and at 4 h (T2), 8 h (T3), 12 h (T4), 24 h (T5), 48 h (T6), and 72 h (T7) using the NRS. Ibuprofen/paracetamol (400 mg/325 mg) was administered as a rescue dose if needed. Results: Pregabalin performed significantly better when compared with gabapentin at all time points except at 72 h after treatment (P=0.170). The placebo group showed significantly higher pain scores than the other two groups. The percentage of pain relief was maximum for pregabalin (92.1%), followed by gabapentin (87.6%) and placebo (69.1%) at 72 h after treatment completion. Conclusion: This study showed that pretreatment with a single dose of pregabalin and gabapentin both had greater analgesic effects than a placebo. They can be effectively used to reduce postoperative endodontic pain.

• The Journal of Advanced Prosthodontics
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• 제15권3호
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• pp.126-135
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• 2023

PURPOSE. The aim of this study was to evaluate the reliability of implant stability measuring devices depending on the location of the implant and the position of the patient. MATERIALS AND METHODS. Six implants were installed in different dentate sextants of six artificial bone models. Implant stability was measured in three conditions of the bone model (without mounting on a phantom head, mounted on a phantom head in supine position, and mounted on a phantom head in upright position). A resonance frequency analysis device (Osstell) and two damping capacity analysis devices (Periotest and Anycheck) were used to measure implant stability. The values measured outside the phantom head were treated as controls, and the values inside the phantom head were compared using an independent t-test. RESULTS. Osstell showed different results in two of the six divisions in both the supine and upright positions compared to outside of the mouth (P < .05). Periotest showed different results in all six parts in the supine position and in five parts in the upright position compared to outside of the mouth (P < .05). While Anycheck showed different results in five areas in the supine position compared to outside of the mouth, it showed different results in only one area in the upright position (P < .05). CONCLUSION. In the difficult implant position for the operator to access, the implant stability measuring devices show less reliability. The accessibility of implant is greatly affected in the order of Osstell, Anycheck, and Periotest.

• 대한치과보철학회지
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• 제49권1호
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• pp.38-48
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• 2011

연구 목적: 본 연구는 고정성 국소의치 제작을 위한 상악 좌측 제2소구치 및 제2대구치의 지대치 삭제에 대하여 인체공학적으로 안정된 진료 자세를 확립하고, 치과의사의 일반적 작업 자세와 비교, 분석하고 인체공학적으로 안정된 자세의 임상적용 가능성을 알아보고 이를 이용하여 향후 치과의사 교육의 기초 자료로 활용하기 위함이다. 연구 재료 및 방법: 상악 좌측 고정성 국소의치를 위한 인체공학적으로 안정된 자세를 고안하고 임상 경력 3-6년의 보철과 전공의 과정에 있는 치과의사 8명을 선정하여 임의의 자세로 상악 좌측 고정성 부분의치 지대치 삭제를 시행하고 연구 대상자들에게 인체공학적으로 안정된 자세를 교육하고 연구 대상들에게 인체공학적으로 안정된 자세로 상악 좌측 고정성 국소의치 지대치 삭제를 시행하였다. 임의의 자세로 삭제 시행한 치아와 인체공학적으로 안정된 자세로 삭제 시행한 치아를 KHDP 3-dimensional measuring device를 사용하여 계측해 교합면 삭제량, 변연의 폭경, 변연의 깊이 축면 경사도. 그리고 삭제시간을 측정 비교하였다. 모든 계측된 결과를 윈도우즈용 SPSS 통계 프로그램 (ver. 18.0, SPSS, Chicago, IL, USA)을 이용하여 교합면 삭제량, 변연의 폭 및 깊이, 축면 경사도, 치아 삭제 시간을 평균값 및 표준편차 분석하고 T-test를 Random Position 와 Home Position에 따른 차이 검정하였다. 결과: 와(fossa) 부위에서의 교합면 삭제량은 상악 좌측 제2소구치 및 제2대구치 모두에서 지시삭제량에 비해 적었으며, 교두정에서의 삭제량은 지시삭제량 1.7 mm에비해 많았으나, Random position과 Home position간에 유의차는 없었다 (P > .05). 변연 폭의 삭제량은 상악 좌측 제2소구치 및 제2대구치 모두에서 지시삭제량에 비해 많았으며, Random position과 Home position간에 유의차는 없었다 (P > .05). 변연 깊이의 삭제량은 상악 좌측 제2소구치 및 제2대구치 모두에서 Random position이 Home position에 비하여 지시삭제량보다 깊었다 (P < .05). 축면경사각은 상악 좌측 제2소구치 및 제2대구치 모두에서 Home position의 축면 경사각이 Random position의 축면경사각보다 작았으나 유의차는 없었다 (P > .05). 피어슨 상관분석 결과, Random position에서 교합면 삭제량, 변연 깊이, 축면경사각은 서로에게 영향을 주고 있었으나, Home position에서는 측정결과 들이 거의 독립적으로 서로에게 영향을 주지 않았다 (P < .05). Home position 삭제 횟수가 많아질수록 삭제소요 시간은 줄어들었고, 이는 실험에 참여한 8명 모두에서 Random position 삭제시간과 비슷해지거나 더 짧았다. 결론: 고정성 국소의치를 위한 상악 좌측 제2소구치 및 제2대구치 삭제의 경우, 교합면 삭제량, 변연의 폭, 변연의 깊이, 축면 경사각에 있어서 Home position과 Random position 간에는 큰 차이가 없었다. 삭제시간, 인접치 인접면 손상 정도는 Home position이 Random position보다 적었다. 또한 자세분석을 한 결과 Home position이 Random position에 비하여 곧은 자세로 인체에 무리를 주지 않았다. 따라서 인체공학적으로 안정된 자세인 Home position의 임상적용 가능성이 높다고 생각된다.

• 대한치과교정학회지
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• 제28권1호
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• pp.113-122
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• 1998

본 연구는 조선대학교 부속 치과병원 교정과에 내원하여 교정치료를 시행하고 있는 환자중 Panadent 교합기 및 condylar position indicator(CPI)를 이용하여 중심위-중심교합 편위양을 측정한 결과, 전후방 및 수직적 편위양이 1.00mm이내, 측방편위양이 0.30mm 이내인 정상범주를 넘는 부정교합 환자 47명을 대상으로 하여 3개월간 교합안정장치를 24시간 장착하고, CPI 및 transcranial projection을 이용하여 교합안정장치 장착전과 장착후의 하악과두의 위치변화를 관찰한 결과 다음과 같은 결론을 얻었다. 1. CPI상의 모든 군에서 중심교합-중심위 사이에 통계적인 유의성이 있었다(p<0.001). 2. transcranial projection상의 superior joint space의 Rt와 Lt+Rt/2에서 중심교합-중심위 사이에 통계적인 유의성이 있었다(p<0.05). 3. CPI상의 모든 superior-inferior components군에서 교합안정장치 사용 전, 후의 중심교합-중심위 사이에 통계적인 유의성이 있었다(p<0.01). 4. transcranial projection상의 superior joint space의 Rt를 제외한 모든 군에서 교합안정장치 사용 전, 후의 중심교합-중심위 사이에 통계적인 유의성이 없었다. 이상의 결론을 종합해 볼 때 중심교합-중심위 사이의 변화를 평가하는데는 transcranial projection보다 CPI가 보다 유용하며, 교합안정장치는 하악과두의 전, 후방적 위치변화보다는 수직적 위치변화에 미치는 영향이 보다 큰 것으로 보인다.