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가압주사식 열가소성 의치상 레진과 이장 레진 간의 결합강도에 관한 연구
문태성,정창모,전영찬,임장섭,Moon Tae-Sung,Jeong Chang-Mo,Jeon Young-Chan,Lim Jang-Seop 대한치과보철학회 2002 대한치과보철학회지 Vol.40 No.1
The purpose of this study was to evaluate the bond strength of reline resin to pressure injection type thermoplastic denture base resin. The denture base resins used in this study were $Hi-polycarbonate^{(R)}$(High Dental Co., Japan), Acetal $dental^{(R)}$(Pressingdental s.r.1., Repubblica di San Marine) of thermoplastic resin and Acron $MC^{(R)}$(GC Dental Industrial Co., Japan) of heat cured resin. The reline resins used were Lucitone $199^{(R)}$(Dentsply international Inc., USA), Tokuso $rebase^{(R)}$(Tokuyama Corp., Japan), and $Lightdon-U^{(R)}$(Dreve-Dentamid-Gmbh, Germany). The reline resins are representative of heat-cured, self-cured, and light-cured resin respectively Bond strength was examined by use of a three-point transverse flexural strength test. The results were as follows 1. The bond strength of Lucitone 199 to Acron MC was the highest. 2. The bond strengths of Lucitone 199 and Tokuso rebase to Hi-polycarbonate resulted in a value of approximately one half that of Lucitone 199 to Acron MC and there were no significant differences between these and the bond strength of Tokuso rebase to Acron MC(p<0.05) 3. The bond strengths of reline resins to Acetal dental were lower than those of reline resins to Hi-polycarbonate. 4. For all base resins Lightdon-U showed lower bond strength than the other reline resins.
LED 조명계를 결합한 캡슐내시경용 초소형 반사굴절식 전방위 광학계의 설계
문태성,조재흥,Moon, Tae Sung,Jo, Jae Heung 한국광학회 2021 한국광학회지 Vol.32 No.2
A subminiature catadioptric omnidirectional optical system (SCOOS) with 2 mirrors, 6 plastic aspherical lenses, and an illumination system of 6 light emitting diodes, to observe the 360° panoramic image of the inner intestine, is optically designed and evaluated for a capsule endoscope. The total length, overall length, half field of view (HFOV), and F-number of the SCOOS are 14.3 mm, 8.93 mm, 51°~120°, and 3.5, respectively. The optical system has a complementary metal-oxide-semiconductor sensor with 0.1 megapixels, and an illumination system of 6 light-emitting diodes (LEDs) with 0.25 lm to illuminate on the 360° side view of the intestine along the optical axis. As a result, the spatial frequency at the modulation transfer function (MTF) of 0.3, the depth of focus, and the cumulative probability of tolerance at the Nyquist frequency of 44 lp/mm and MTF of 0.3 of the optimized optical system are obtained as 130 lp/mm, -0.097 mm to +0.076 mm, and 90.5%, respectively. Additionally, the simulated illuminance of the LED illumination system at the inner surface of the intestine within HFOV, at a distance of 15.0 mm from the optical axis, is from a minimum of 315 lx to a maximum of 725 lx, which is a sufficient illumination and visibility. 측면 360° 조명을 위한 6개의 LED (light emitting diode)로 구성된 조명계가 부착된 캡슐내시경용 초소형 반사굴절식 전방위 광학계를 설계하고 성능을 평가하였다. 이 광학계의 총 길이, 전장길이, 반화각(HFOV: half field of view), F-수는 각각 14.3 mm, 8.93 mm, 51°~120°, 3.5로 설계되었다. 이 전방위 광학계는 0.1 megapixels의 CMOS (complementary metal-oxide-semiconductor) 센서를 사용하였으며, LED 조명계는 한 개당 0.25 lm의 LED 6개를 사용하여 광축을 따라 놓여 있는 내장의 내벽을 조명하도록 하였다. 이 결과, 최적화 설계된 광학계의 변조전달함수 0.3에서의 공간주파수, 나이퀴스트 주파수인 44 lp/mm와 0.3의 변조전달함수에서 공차에 따른 누적확률, 초점심도는 각각 130 lp/mm, 95%, -0.097 mm~+0.076 mm이다. 또한 광학계의 시야각 범위 내에서 LED 조명계에 의한 광축으로부터 물체거리가 15 mm인 내장의 내벽에서의 시뮬레이션된 조도는 최소 315 lx~최대 725 lx로 내장의 내벽을 촬영할 수 있는 조도와 가시도임을 알 수 있다.
레진 표면처리제가 열가소성 의치상 레진과 자가중합형 이장 레진 간의 결합강도에 미치는 여향
정창모,문태성 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4
The introduction of several thermoplastic polymers was intended to overcome the disadvantages of methacrylate denture base resins. Existing dentures often require denture base relines to improve the fit against the tissue bearing mucosa because of gradual changes of underlying bone structure. Chair-side reline that used autopolymerizing acrylic resin is not only convenient but inexpensive means to improve the fit and function of denture bases. However, it is not known whether the differences in chemical composition of resin surface primers affect the bonding strengths between chair-side reline resin and thermoplastic denture base resin. This study evaluated two kinds of primers(exclusive primer recommended by manufacture of thermoplastic resin and primer supplied with chair-side reline resin) to determined their effect on the bond strengths of a chair-side reline resin to two different thermoplastic denture base resins(polycarbonate and polyacetal resin) by use of a three-point transverse flexural strength test. In both polycarbonate and polyacetal resin, each exclusive resin surface primer resulted in higher bond strength than chair-side reline resin primer(p<0.05). Bond strengths of polycarbonate with chair-side reline resin were higher than those of polyacetal resin, despite the type of resin surface primer(p<0.05).