우치치질에 레이저조사시 레진과의 결합강도에 관한 연구

조주온,송광엽,박찬운,Cho, Ju-On,Song, Kwang-Yeob,Park, Charn-Woon 대한치과보철학회 1989 대한치과보철학회지 Vol.27 No.2

The purpose of this study is to measure the bonding strength at the enamel and dentin of extracted bovine incisors when they are irradiated by W Nd: YAG, EoQ Nd: YAG, and CW $CO_2$ laser, etched and then attached by composite resin. The laser-irradiated surface, the etched surface after the laser-irradiation and the interface of the treated surface and resin are observed by using scanning electron microscope. The NP Nd:YAG laser is used at the peam power of 207 KW. The EOQ Nd: YAG laser is used at the peak power of 1.15Mk. The CW $CO_2$ laser is used at the energy output of 5W and 10W in enamel; in dentin, at the energy output of 2W. The obtained results were as follows: 1. The shear bond strength of enamel decreased in the following order: EOQ Nd:YAG laser group, NP Nd:YAG laser group, CW $CO_2$ laser groups, unlased group. The unlased group showed a significant difference from EOQ Nd:YAG laser group (P<0.01), NP Nd:YAG laser group (P<0.05), but no significant difference from CW $CO_2$ laser group (P>0.05). 2. The shear bond strength of dentin decreased in the following order: CW $CO_2$ laser group, NP Nd:YAG laser group, unlased group, EOQ Nd:YAG laser group. The unlased group showed a significant difference from CW $CO_2$ laser group (P<0.01), but no significant difference from Nd:YAG laser groups (P>0.05). 3. The scanning electron microscope of enamel revealed irregular microcrack and pore at the surface in the NP Nd:YAG laser group and CW $CO_2$ laser group, but the crackless flat surface in the EOQ Nd:YAG laser group. 4. The scanning electron microscope of dentin revealed obstruction of in most of dentinal tubule and decrease of diameter. 5. The scanning electron microscope of the interface of resin and enamel revealed prominent penetration of resin tag in the EOQ Nd:YAG laser group.

牛齒 齒質에 Laser 照射時 레진과 結合强度에 關한 硏究

조주온,김기진,배태성,송광엽,박찬운 全北大學校 齒醫學硏究所 1989 전북치대논문집 Vol.7 No.1

The purpose of this study is to measure the bonding strength at the enamel and dentin of extracted bovine incisors when they are irradiated by NP Nd : YAG, EOQ Nd : YAG, and CW CO_2 laser, etched and then attached by composite resin. The laser-irradiated surface, the etched surface after the laser-irradiation and the interface of the treated surface and resin are observed by using scanning electron microscope. The NP Nd : YAG laser is used at the peak power of 2.07 KW. The EOQ Nd : YAG laser is used at the peak power of 1.15Mw The CW CO_2 laser is used at the energy output of 5 W and 10 W in enamel ; in dentin, at the energy output of 2 W. The obtained results were as follows : 1. The shear bond strength of enamel decreased in the following order : EOQ Nd : YAG laser group, NP Nd : YAG laser group, CW CO_2 laser groups, unlased group. THe unlased group showed a significnatl difference from EOQ Nd : YAT laser group (P<0.05), NP Nd : YAG laser group (P<0.05), but no significant from CW CO_2 laser group (P<0.05). 2. The shear bond strength of dentin decreased in the following order : CW CO_2 laser group, NP Nd : YAG laser group, unlased group, EOQ Nd : YAG laser group. The unlased group showed a significant difference from CW CO_2 laser group (P<0.01), but no significant difference from Nd : YAG laser groups (P>0.05). 3. The scanning electon microscope of enamel revealed irregular microcrack and pore at the surface in the NP Nd : YAG laser group and CW CO_2 laser group, but the crackless flat surface in the EOQ Nd : YAG laser group. 4. The scanning electron microscope of dentin revealed obstruction of in most of dentinal tubule and decrease of diameter. 5. The scanning electon microscope of the interface of resin and enamel revealed prominent infiltration of resin tag in the EOQ Nd : YAG laser group.

Hydroxylapatite 및 Titanium Plasma Spray 피복임프란트와 골조직 계면의 조직학적 비교 연구

조주온,송광엽,박찬운,Cho, Ju-Oh,Song, Kwang-Yeob,Park, Charm-Woon 대한치과보철학회 1995 대한치과보철학회지 Vol.33 No.3

This study evaluated the responses of mandibular bones of mongrel dogs to loaded hydro xylapatite(HA) and titanium plasma spray(TPS) coated endosseous dental implants, using unloaded ones as the control group. after HA and TPS coated implants were implanted, their bone reactions with vital bones have been observed with light and scanning electron microscope(SEM) at the three periods of the 4th, 12th and 20th week. These reactions have been also compared in a histomorphometric method. The elemental distribution state of implants and the interface neighboring bone tissues have been measured with the energy dispersive analysis of X-rays(EDAX). The following results were obtained ; 1. The light microscopic analysis showed osseointegration in both the control group and the occlusal force loaded group ; Its degree was shown to be higher in the long-maintained and occlusal force groups. 2. The SEM analysis showed that both groups had osseointegration, In the case of TPS-coated implants, the coated layer was divided on the bone interface. In the case of HA-coated implants, there appeared a division between the metal and coated interface. 3. In the histomorphometric analysis, the measured ratio contaction bone of TPS-coated implants was $70{\pm}19$% in the case of no occlusal force ; it was $84{\pm}13$% in the case of occlusal force. The measured ratio contacting bone of HA-coated implants was $75{\pm}18$% in the case of no occlusal force ; it was $94{\pm}9$% in the case of occlusal force. However, there was no significant difference statistically(p>0.05). 4. Both groups showed that the ratio of calcium and phosphorous increased more in the bone tissues than on the bone to implant interface.

탄성 의치상 이장재의 캔디다 알비칸스 부착도에 관한 실험적 연구

하일수,조주온,이상돈,송광엽,박찬운 全北大學校 齒醫學硏究所 1992 전북치대논문집 Vol.10 No.1

The purpose of this study is to compare the response of four commercially available soft denture lining materials to the growth of C. albicans in vitro. Twelve samples of each soft lining materials were made to a uniform size and volume(15×5×4㎜) and sterilized using ethylene oxide. The samples were individually placed in culture tubes containing 5㎖ of sterile SDB(sabouraud dextrose broth dehydrated) and 0.1㎕ of activated C. albicans(ATCC 10231). The culture tubes had been incubated in incubator at 37℃. Three samples of each material had been tested at 3, 21, 35 and 56 days to determine the number of adherent cells of C. albicans on their surfaces and the number of nonadherent cells in the broth associated with each samples. The data have been analyzed by ANOVA and Scheffe test. The results have been obtained as follows : 1. In growth patterns of C. albicans within soft lining materials, Molloplast-B and K-33 were significantly higher(p<0.01) compared with Coe-Soft, but there was no significant difference between Coe-Soft, Coe Super-Soft and Mollosil(p>0.05). 2. Molloplast-B showed significantly higher(p<0.01) amounts of C. albicans adhering to its surface than other materials under experimental conditions. 3. Generally, adherence was significantly increased until 5 weeks, and after then showed decreased pattern in all materials(p<0.01). 4. The C. albicans was able to penetrate the inner portion of all samples. Coe-Soft showed most amounts of invaded C. albicans, followed in order by Mollosil, Molloplast-B, and Coe Super-Soft.

유리단 국소의치 장착 후 M.K.G.에 의한 하악운동 형태 및 속도의 변화

최현미,조주온,이상돈,송광엽,박찬운 全北大學校 齒醫學硏究所 1992 전북치대논문집 Vol.10 No.1

The purpose of this study is to evaluate the effects of distal extension partial denture on the mandibular movement patterns and velocity. The subjects are 10 patients who have unilateral or bilateral distal extension edentulous area in maxillary and/or mandibular arches. Their mandibular movement patterns and velocity had been measured by Mandibular Kinesiograph(M.K.G.-K6 diagnostic system, Myo-tronics Inc. Seattle. WA. U.S.A.) once just before the treatment and 8 times every week since the dentures were placed. The data have been analyzed statistically by means of ANOVA and Tukey test. The results have been obtained as follows : 1. The placement of the dentures has reduced the amount of vertical and antero-posterior displacement in the habitual mandibular movement significantly(p<0.01). 2. The maximum opening and closing velocity and the mean opening and closing velocity showed no significant change with the placement of the partial dentures(p>0.01). 3. The velocity trace of maximum opening-closing movement has been more regularized and well-coordinated, and the number of clicks decreased continuously after placement of the dentures and showed stable patterns since the 5th week(p<0.01). 4. The left deviation has been decreased significantly after the placement of the dentures and showed no significant change since the 4th week. The right deviation has also been reduced, but there was shown no difference after the 1st week(p<0.01). 5. The crossover pattern has been most frequently observed in the frontal plane and the sagittal plane. It has not been changed with the denture placement and stabilized uniformly.