• Journal of Sensor Science and Technology
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• v.9 no.2
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• pp.134-140
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• 2000

Si wafer direct bonding(SDB) technology is very attractive for both Si-on-insulator(SOI) electronic devices and MEMS applications. This paper presents on pre-bonding according to HF pre-treatment conditions in Si wafer direct bonding. The characteristics of bonded sample were measured under different bonding conditions of HF concentration and applied pressure. The bonding strength was evaluated by tensile strength method. A bond characteristic on the interface was analyzed by using FT-IR, and surface roughness according to HF concentration was analyzed by AFM. Si-F bonds on Si surface after HF pre-treatment are replaced by Si-OH during a DI water rinse. Consequently, hydrophobic wafer was bonded by hydrogen bonding of Si-OH$\cdots$(HOH$\cdots$HOH$\cdots$HOH)$\cdots$OH-Si. The pre-bonding strength depends on the HF pre-treatment condition before pre-bonding. (Min : $2.4kgf/cm^2{\sim}$Max : $14.9kgf/cm^2$)

• Proceedings of the KACD Conference
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• 2003.11a
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• pp.608-608
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• 2003

The main objectives of root canal therapy are cleaning and shaping and then obturating the root canal system in 3 dimensions to prevent reinfection. Many instrumentation techniques and devices, supported by an irrigation system capable of removing pulp tissue remnants and dentin debris, have been proposed to shape root canals. But current regimens in chemomechanical debridement using instrumentation and irrigation with NaOCl are not predictably effective in root canal disinfection. These findings are not surprising because the root canal system is complex and contains numerous ramifications and anatomical irregularities. The microorganisms in root canals not only invade the anatomic irregularities of the root canal system but also are present in the dentinal tubules. Therefore further disinfection with an effective antimicrobial agent may be necessary and it well1mown that use of intracanal medication will lower bacterial count in infected root canals. Calcium hydroxide has a long history of use in endodontics, and more attention has been given to the use of calcium hydroxide as intracanal dressing for the treatment of infected pulp. However, when treatment is completed in one visit, no intracanal medications other than intracanal irrigants are used. Recently, a mixture of a tetracycline isomer, an acid, and a detergent(MTAD), has been introduced as a final rinse for disinfuction of the root canal system. It has been shown that MTAD is able to remove the smear layer with minimal erosive changes on the surface of dentin, and is effective against Enterococcus faecalis, a microorganism resistant to the action of other antimicrobial medications. In another study, the ability of MTAD was investigated to disinfect contaminated root canals with whole saliva and compared its efficacy to that of NaOCl Based on the results, it seems that MTAD is significantly more effective than 5.25% NaOCl in eradicating bacteria from infected root canals. In the cytotoxicity evaluation, MTAD is less cytotoxic than engenol, 3% $H20_2,\;Ca(OH)_2$ paste, 5.25% NaGCl, Peridex, and EDTA and more cytotoxic than 2.63%,1.31% and 0.66% NaOCl. Is it promising or transient?

• The Journal of the Korean dental association
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• v.48 no.5
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• pp.371-378
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• 2010

The objective of this study was to compare the effectiveness of essential oil mouthrinse and interdental brush for oral hygiene in orthodontic patient. 90 patients, with fixed orthodontic appliances, were divided into 3 groups(Group 1: patients who had only used toothbrush, group 2: toothbrush + essential oil mouthrinse, group 3: toothbrush + interdental brush). Then, plaque index(PI) and gingival index(GI) were evaluated at before(T0), 3 weeks after(Tl) and 6 weeks after(T2) the experiment. The present study revealed the following conclusions: (1) There was statistically significant decrease in PI and GI of groups 2 and 3 comparing to those of group 1 during 6 weeks.(p<0.05) (2) There was no significant difference in the level of decrease in PI and GI between group 2 and group 3.(p<0.05) The present study thus implied that use of mechanical or chemical aid such as interdental brush and mouth rinse in addition to toothbrushing may help maintaining oral hygiene in patients undergoing fixed orthodontic treatment for prolonged duration.

• The Journal of the Korean dental association
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• v.55 no.2
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• pp.180-188
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• 2017

Introduction : Inadequate oral health control is a major risk of oral diseases. Regular home-based care is essential to maintain good oral hygiene. In particular, mouthrinses can support conventional tooth brushing in reducing accumulation of oral plaque. Effect : Antimicrobial mouthrinses are used as part of daily oral care to reduce plaque and gingivitis. Mouthrinses contains fluoride could help remineralization of enamel and dentin. The most common molecules contained in mouthrinses are chlorhexidine, essential oils, cetyl pyridinium chloride, triclosan, hyaluronic acid. Currently, chlorhexidine is the most efficacious compound, with both antiplaque and antibacterial activities. Similar results are reported for essential oils and cetyl pyridinium chloride, although with a somewhat reduced efficacy. Considering the adverse effects of chlorhexidine and its time-related characteristics, this molecule may best be indicated for acute/short term use, while essential oils and cetyl pyridinium chloride may be appropriate for long-term, maintenance treatment. Conclusion and suggestion : Antimicrobial mouthrinses are safe and effective, and when used in conjunction with brushing and flossing, they are an important method of reducing plaque and gingivitis. To improve compliance, dental health care professionals should adapt oral health care recommendations to fit patients' specific needs.

• Journal of Periodontal and Implant Science
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• v.24 no.2
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• pp.271-282
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• 1994

Active treatment of periodontal disease consists of plaque control by the patient, with root planing and surgery perfomed by the dental practitioner. Chlorhexidine rinse has been the most effective antiplaque agent available today and tetracycline has been the most favored antibiotics. Therefore, the purpose of this study was compared the different effect among groups(saline mouthrinse[group I], 0.125% chlorhexidine mouthrinse [groupII], and 0.125% chlorhexidine mouthrinse containing tetracycline[groupIII]) during the immediate post periodontal therapy. We assessed plaque index, gingival index, papillary bleediing index, gingival crevicular volume, periodontal attachment loss, and periodontal pocket depth in 3 sites per subject. The assessment was made at baseline. At 1 week after scaling, and at 2 weeks after curettage. All groups were clinically and statistically reduced plaque score, gingival score, papillary bleeding score, and gingival crevicular volume at 2 weeks after curettage. Group II was significantly reduced periodontal pocket depth.(P<0.05) At 1 week after scaling, al clinical index scores were reduced but not singificantly difference between the groups.(p>0.05) At 2 weeks after curettage, plaque score, gingival score and papillary bleeding score were significantly difference between the groups.(P<0.05) During the experimental period, gingiva was not damaged and stain of the tongue or teeth were not noted in all groups.

• Journal of the Korean Society of Clothing and Textiles
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• v.28 no.3_4
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• pp.422-432
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• 2004

This study investigated underwear consumption behavior of women, who were 20∼59 years old and resided in Incheon during 2002 summer. 372 women completed questionnaires, and data were analyzed using factor analyses, t-test, ANOVA, $\chi$$^2$-analyses. They usually purchased underwear considering comfort and economic factor at a discount store. They wore sleeveless T-shirts, but they didn't wear underpants except panties highly all the year round. Higher rate of them wore pantyhose instead of underpants during autumn, winter and spring. They demanded unstitching of stitches and lengthened sleeves in most of the groups. And older and lowly educated women group wanted widen armhole of upper underwear, and tighten waistband of panties. They generally washed in washing machine using cold water. Besides they added oxygen bleach and softner during wash and final rinse. Older than 20's boil their underwear frequently. The women in a group of boiling commonly answered the looseness of waistband. It is recommended not to boil but to soak with bleach added warm water for improving the whiteness and durability of underwear. For a treatment with higher temperature deprives the elasticity of spandex.

• Proceedings of the KIEE Conference
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• 1999.07g
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• pp.3279-3281
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• 1999

This paper describes a method of direct wafer bonding using surfaces activated by a radio-frequency hydrogen plasma. The hydrogen plasma cleaning of silicon in the RIE mode was investigated as a pretreatment for silicon direct bonding. The cleaned silicon surface was successfully terminated by hydrogen, The hydrogen-terminated surfaces were rendered hydrophilic, which could be wetted by Dl water rinse. Two wafers of silicon and silicon dioxide were contacted to each other at room temperature and postannealed at $300{\sim}1100^{\circ}C$ in an $N_2$ atmosphere for 2 h. From the AFM results, it was revealed that the surface became rougher with the increased plasma exposure time and power. The effect of the plasma treatment on the surface chemistry was investigated by the AES analysis. It was shown that the carbon contamination at the surface could be reduced below 5 at %. The interfacial energy measured by the crack propagation method was 122 $mJ/m^2$ and 384 $mJ/m^2$ for RCA cleaning and hydrogen plasm, respectively.

• Journal of Veterinary Clinics
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• v.24 no.3
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• pp.432-436
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• 2007

Therapeutic effect by injection-AP with antibiotics plus conventional treatment was investigated to establish a new treatment method for canine demodicosis. Three patients diagnosed into canine demodicosis were used in the present study. Injection-AP with enrofloxacin (5 mg/kg, twice a week) was made into the acupoints such as Fei Shu(BL13), Wei Zhong (BL40), Da Zhui (GV14), Zu San Li (ST36), He Gu (LI04), Qu Chi (LI11) and Sang Yin jiao(SP06) for 5 weeks. Further, they were additionally received with conventional treatments including injection of ivermectin (0.5 mg/kg, twice a week, SC) and 0.05% amitraz rinse (twice a week) for 5 weeks. The clinical symptoms (pruritus, excoriation, erythema and alopecia) were much improved by injection-AP therapy plus conventional treatment, compared by those of pre-treatment. Case 1 became to normal after 4 weeks, Case 2 became to mild after 5 weeks and Case 3 became to normal after 5 weeks. Total WBC revealed decreasing tendency with treatment in all cases, however, N/L ratios didn't show regular pattern of change with treatment. Notable changes were not histopathogically found in skin lesions of Case 1 and Case 3 except Case 2 with mild change after 5 weeks treatment, compared by those of pre-treatment, respectively. In conclusion, the present patients were cases with canine demodicosis which revealed favorable therapeutic response by injection-AP with antibiotics plus conventional treatment.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.23 no.1
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• pp.182-198
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• 2010

Background : The varieties of manifestations referred to oral, glottal, labial and dental diseases has been long complicated physicians in the efficient diagnosis and treatment of these diseases. Acupuncture has been widely used in Korea throughout the history and provides an efficient method in the treatment of them Objectives : Establish a distinctive and efficient acupuncture method for the treatment of oral, glottal, labial and dental diseases based in literature research Method : We reviewed four Korean medical literature, "Guide to Swollen Sore Treatment", "Treasured Mirror of Eastern Medicine", "Experiential Prescriptions of Acupuncture and Moxibustion", and "Essential Rhymes on Acupuncture and Moxibustion by Master Sa-am", and analyzed the therapeutic characteristics in the treatment of oral, glottal, labial and dental diseases Result : 1. According to "Guide to Swollen Sore Treatment", we could noted frequent application of blood letting methods in the affected area, then rinse ones mouth with salty water and further application of taro plaster. Also found acupuncture methods utilizing heated mole cricket or silkworm in the sublingual region. Regarding herbal method, Realgar was rubbed in the affected area. Mainly used acupuncture points in the treatment of oral, glottal, labial and dental diseases were GV20, GB20, LU5, and auricular anterior hairline 2. In "Treasured Mirror of Eastern Medicine", blood letting method in the sublingual region and burning needle searing method were the most frequently applied in the treatment of oral, glottal, labial and dental diseases. Moxibustion was also applied in the treatment of labial and dental diseases. Particularly, said to apply 3 moxa cones in ear zones of both sides, when no medicine is effective. This demonstrates how emphasized the importance of moxibustion in this kind of disease. Mainly used acupuncture points were GV16, CV24, LI4, EX-HN12, and EX-HN13 3. In "Experiential Prescriptions of Acupuncture and Moxibustion", no other methods beside wrist. Superstitious methods like applying moxibustion on the tooth picture drawn on the roofing tile need further confirmation. Mainly used acupuncture points were LI4, ST36, and HT7. 4. "Essential Rhymes on Acupuncture and Moxibustion by Master Sa-am", identified the cause of diseases according to visceral pattern identification. Stomach and Spleen in charge of vocal, lingual, and labial disease, Kidney for dental disease, and further scrutinizing identification according to Liver, Heart, Stomach, Lung, and Kidney manifestations. Used supplementation and draining needling methods of self meridians and other correlating meridians. Conclusions : After previous study on stroke and eye diseases, we could also find various efficient methods according to oral, glottal, labial and dental diseases, through literature research of korean medical classics. This study will concurrently result in establishing distinctive therapeutic method characteristic of Korea.

• Journal of Digital Convergence
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• v.14 no.10
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• pp.367-373
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• 2016

The aim of this study was to evaluate the anti-caries effect of the essential oils and chlorhexidine mouth rinse. 42 subjects were randomized allocated to the chlorhexidine (n=22) and essential oils group (n=20). Subjects were instructed to rinsing each mouthwash by 15 ml once a day during the 7 days. The CRT and Cariview scores were recorded at baseline and 4 weeks after treatment. Data was analysed by using PASW 18.0 program with independent t-test and paired t-test. After 1 month, Cariview score was shown reducing compare to baseline. However, there were no significant differences between the groups. High risk level of MS and LB was decreased to 9~15% after treatment in two groups. Both of the chlorhexidine and essential oils mouth wash showed an antiplaque effect. Although chlorhexidine continues to be the "gold standard" in terms of antiplaque effect, essential oils could be considered a reliable alternative antimicrobial agent.