• Journal of Bio-Environment Control
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• v.31 no.4
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• pp.393-400
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• 2022

Postharvest quality of sweet pepper fruits was mainly defined as external appearance, i.e., shape, fruit weight and surface color. These quality traits tend to involve esthetic appeal, it disregards gustatory properties and nutritional value. However, comparative studies according to the marketability of sweet pepper fruits are insufficient. This study was carried out to compare the physicochemical components, antioxidant activity and carotenoid contents of marketable and unmarketable sweet pepper fruits (Capsicum annuum L.). Physicochemical components (proximate composition, minerals and total phenolic contents) and antioxidant activities using various methods were investigated. The proximate composition values (%) of marketable and unmarketable fruits were: moisture (90.28 and 90.29), ash (0.74 and 0.26), crude protein (0.67 and 0.72), crude lipid (0.38 and 0.32). There were no significant differences in antioxidant activity, while total phenolic content was higher in marketable fruit. Carotenoids contents were 29.3 ± 2.6 and 31.9 ± 2.9 ㎍·g^-1 in marketable and unmarketable fruits respectively, and identified β-carotene, violaxanthin, neoxanthin, and zeaxanthin. Lutein and capsaicin were not detected. In this study, potential value of unmarketable sweet pepper fruit could be identified to be applied as a food ingredient and functional food material.

• Journal of the korean academy of Pediatric Dentistry
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• v.50 no.1
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• pp.104-112
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• 2023

A 3D-printed resin crown is a novel option for esthetic crown restoration for primary teeth, which are typically bonded with resin cement. The purpose of this study was to evaluate the bonding ability of a 3D printing resin and compare it with other indirect resin materials for crown fabrication. The shear bond strengths of two 3D printing resin materials, Graphy (GP) and NextDent (NXT), and two indirect resin materials, VIPI Block (VIPI) and MAZIC Duro (MZ), were compared in the study. For all materials, the shear bond strength at the interface between the surface of the resin material and resin cement was measured. The mean shear bond strength values of GP, NXT, MZ, and VIPI were 23.29 ± 3.88, 26.14 ± 4.67, 25.41 ± 4.03, and 18.79 ± 4.26 MPa, respectively. There was no significant difference among the SBSs of GP, NXT and MZ except for VIPI. The result of this study indicates that the 3D printing resin meets the essential requirement for clinical use by showing clinically adequate bond strength.

• Journal of Haehwa Medicine
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• v.11 no.1
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• pp.137-149
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• 2002

Dong-Eui-Bo-Gham Oriental medicine clinic on the purpose of losing their weight, from March 1, 2001 to March 1, 2002. The characteristics studied were gender, average weight, average height, distribution of body fat rate, base body metabolism rate, distribution of bmi, purpose of losing weight, treatment history, cause of gaining weight, clinical symptoms, distribution of Sahsang constitution, and change of body constituent. The conclusions drawn from this study were: 1. Among patients who came to the clinic for weight loss, there were 16 females (80%), and 4 males (20%). The ratio of gener was 1 to 4 (male to female) The distribution of their ages were 1 in one's teens (5%), 6 in their 20s (30%), 7 in their 30s (35%), and 6 in their 40s (30%). 2. The average weight of the patients was 72.155kg, and their average height was 163.2 cm. 3. The body fat rates of patients were distributed as: 2 were below 25 (10%), 3 were 25 to 30 (15%), 8 were 30 to 35 (40%), 5 were 35 to 40 (25%), and 2 were 40 to 45 (10%). 4. The base body metabolism rates of the patients were distributed as: 1 was below 1000Kcal (5%), 6 were 1100 to 1200Kcal (30%), 5 were 1200 to 1300Kcal (25%), 6 were 1300 to 1400Kcal (30%), and 2 were 1400 to 1500Kcal (10%). 5. The distribution of the patients bmi was: 4 were below 20 (20%), 5 were 20 to 25 (5%), 11 were 25 to 30 (55%), and 4 were 30 to 35 (20%). 6. The patients visited the clinic to lose their weight for the follwoing purposes: 5 were related to health concerns (25%), and 15 were to imprve their physical apprearnce (75%). Among patients who wanted to lose their weight becase of health concerns, 4 were married (20%) and 1 was single (5%). Among patiens who wanted to lose their weight to improve their physical appearance, 6 were married (30%) and 9 were single (45%). 7. As for the past treatment methods, physical exercises were most frequently used (19 patiens, 43%). 14 tried diet (32%), 8 used food substitues (19%), 1 was treated through Western medicine, and 1 was not related to any of these (2%). 8. Main reasons for weight gains were: 12 were related to overeating (40%), 10 were stress (33%), and 8 were lack of physical exercise (27%). 9. Physical symptoms included: 15 were fatigue (29%), 14 were constipation (26%), 13 were body swelling (25%), 3 were headache (5%), menstruation pain (4%), one was stomach upset (2%), 2 were related to physical structure, and 2 were related to other (4%). 10. As for the distribution of Sahsang constitution, 10 were Taeum (50%), 9 were Sohyang (45%), and 1 was Sohum (5%). 11. The average muscle weight was 44.87kg, average abdomen fat rate was 0.8999, and average base body metabolism rate was1369.2Kcal. 12. For the 5-week period, The body fat rate changes were 35.93 1.56% to 30.40 1.98% for A group, and 34.27 1.19% to 31.73 1.38% for B group. The abomen fat rate changes were 0.90 0.02% to 0.86 0.03 for A group, and 0.89 0.02% to 0.83 0.02% for B group. The body fat weight changes were 26.92 2.04kg to 20.74 1.98kg for A group, and 27.86 3.37kg to 24.58 3.02kg for B group. The body weight chages were 72.36 3.18kg to 64.54 2.55kg for A group, and 72.48 3.14kg to 67.74 3.11kg for B group. The muscle rate changes were 43.86 1.63kg to 43.10 1.76kg for A group, and 42.72 1.22kg to 41.60 1.86kg for B group. Overall, A group was superior to B group. 13. After being treated for obesity, 13 patients used exercise treatment (65%), 5 continued to receive obesity treatment (25%), and 2 used diet (10%). Based on these results, we could conclude that the importande of setting a criterion of obesity and weight control have changed according to changes in social and cultural values, and that treatment of obesity through Oriental medicine and research should keep up with changes in esthetic and psychological values.

• The Journal of Korean Academy of Prosthodontics
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• v.46 no.5
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• pp.443-454
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• 2008

Statement of problem: A clinically successful color match is one of the important factor to get an esthetic dental restoration. Dental shade guides are commonly used to evaluate tooth color in restorative procedure. But numerous reports have indicated that common shade guides do not provide sufficient spectral coverage of the natural tooth colors. To address issues associated with the shade guide, distinct avenues have been pursued objective spectrophotometric / colorimetric assessment. Purpose: This study compared the accuracy of tooth color selection of spectrophotometer with that of human visual determination. Three main factors were investigated, namely, the effect of light, the individual variation and the experience of the observer. Material and methods: At the first experiment, on ten patients, one operator independently selected the best matching shade to the unrestored maxillary central incisor, using a Vita Classical Shade Guide in the morning, at noon and in the afternoon. The same teeth were measured by means of a reflectance spectrophotometer. At the second experiment, on ten patients, ten operators (5 experts, 5 novices) selected and measured by the same method above at noon. At the third experiment, the results of the second experiment were divided into two groups, expert and novice, and analyzed. Results: 1. There was significant difference between visual and spectrophotometric assessment (mean ${\Delta}E$ values) in experiment 1, 2, 3 (P < .05). 2. There was no significant difference between experts and novices group, when comparing with each visual and spectrophotometric assessment (mean ${\Delta}E$ values). Conclusion: Spectrophotometer could be used to analyze the shade of natural tooth objectively. Thereby, this method offers the potential tominimize considerably the need for corrections or even remakesafter intraoral try-in of restoration. Furthermore, to achieve its advantage, both the shade-matching environment and communication between dentist and technician should be optimized with use of visual and instrumental shade-matching systems.

• Journal of the korean academy of Pediatric Dentistry
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• v.29 no.4
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• pp.509-518
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• 2002

The purpose of this study was to evaluate the bonding of compomer to deciduous dentin which is known to have been developed to improve the weak properties of glass ionomer cement and composite resin. 120 sound primary molars were used for the shear bond strength test and another 24 for the scanning electron microscopic evaluation. Each material was ailed into polyethylene mold attached to exposed dentinal surface($3{\times}4mm$ in diameter) of sample blocks. Shearbond strength was measured using Universal testing machine and data were analyzed statistically with Oneway-ANOVA and Scheffe test. Scanning electron microscopic observation was performed in order to evaluate the pattern of distribution and penetration of resin tags and hybrid layer. Compomer groups(II-V) showed significantly higher bond strength values than glass ionomer group(I)(p<.05). Etching-compomer groups(III, V) showed the significantly higher bond strength than non-etching compomer groups(II, IV)(p<.05), but slightly lower values than composite resin group(VI) with no statistically significant difference(p>.05). No significantly different bond strength was found between compomer groups of different bonding system(p>.05). Scanning electron micrographs showed more irregular distribution of short and thin resin tags in non-etching compomer groups(II, IV) whereas the more regular and intimate distribution of long and thick tags in etching compomer groups(III, V) and composite resin group(VI). The evaluation of hybrid layer also showed more regular formation of thicker layer in etching compomer groups(III, V). Based on the results of present study, the use of compomer as an esthetic restorative material for primary molars might be justified.

• The Journal of Korean Academy of Prosthodontics
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• v.55 no.2
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• pp.144-150
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• 2017

Purpose: The aim of this in vitro study is to investigate load bearing capacity of esthetic abutments according to the type of material and wall thickness. Materials and methods: 70 specimens equally divided into seven groups according to their abutment wall thicknesses. The abutments prepared with titanium 0.5 mm wall thickness were used as a control group (Ti-0.5), whereas zirconia abutments and resin nano ceramic abutments with wall thickness 0.5 mm, 0.8 mm and 1.0 mm were prepared as test groups (Zir-0.5, Zir-0.8, Zir-1.0 and RNC-0.5, RNC-0.8, RNC-1.0). All specimens were tested in a universal testing machine to evaluate their resistance to fracture and all of them underwent thermo-cycling before loading test. Mean fracture values of the groups were measured and statistical analyses were made using two-way ANOVA. Results: Zir-1.0 showed the highest mean strength ($2,476.3{\pm}342.0N$) and Zir-0.8 ($1,518{\pm}347.9N$), Ti-0.5 ($1,041.8{\pm}237.2N$), Zir-0.5 ($631.4{\pm}149.0N$) were followed. The strengths of RNC groups were significantly lower compared to other two materials (RNC-1.0 $427.5{\pm}72.1$, RNC-0.8 $297.9{\pm}41.2$) and the strengths of all the test groups decreased as the thickness decreases (P < .01). RNC-0.5 ($127.4{\pm}35.3N$) abutments were weaker than all other groups (P < .05). Conclusion: All tested zirconia abutments have the potential to withstand the physiologic occlusal forces in anterior and posterior regions. In resin nano ceramic abutments, wall thickness more than 0.8 mm showed the possibility of withstanding the occlusal forces in anterior region.

• Restorative Dentistry and Endodontics
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• v.32 no.1
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• pp.19-27
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• 2007

The purpose of this study is to develope new dental color-space system. Twelve kinds of dental composites and one kind of dental porcelain were used in this study. Disk samples (15 mm in diameter, 4 mm in thickness) of used materials were made and sample's CIE $L^*a^*b^*$ value was measured by Spectrocolorimeter (MiniScan XE plus, Model 4000S, diffuse/$8^{\circ}$ viewing mode, 14.3 mm Port diameters, Hunter Lab USA) The range of measured color distribution was analyzed. All the data were applied in the form of T### which is expression unit in CNU Cons Dental Color Chart. The value of $L^*$ lies between 80.40 and 52.70. The value of $a^*$ are between 10.60 and 3.60 and $b^*$ are between 28.40 and 2.21. The average value of $L^*$ is 67.40, and median value is 67.30. The value of $a^*$ are 2.89 and 2.91 respectively. And for the $b^*$, 14.30 and 13.90 were obtained. The data were converted to T### that is the unit count system in CNU-Cons Dental Color Chart. The value of $L^*$ is converted in the first digit of the numbering system. Each unit is 2.0 measured values. The second digit is the value of $a^*$ and is converted new number by 1.0 measured value. For the third digit $b^*$ is replaced and it is 2.0 measured unit apart. T555 was set to the value of $L^*$ ranging from 66.0 to 68.0, value of $a^*$ ranging from 3 to 4 and $b^*$ value ranging from 14 to 16.