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구기태(Ki-Tae Koo) 대한치과의사협회 2016 대한치과의사협회지 Vol.54 No.4
This manuscript aims at discussing the technical and biological aspects of peri-implant disease. The following contents will be discussed. -The difference between peri-implantitis and peri-implant mucositis. -Prevalence of peri-implant disease. -Risk factors for peri-implantitis. -Indications and boundaries of non-surgical and surgical treatment -Treatment flow-chart by Schwarz -Limitations of non-surgical treatment -Methods to decontaminate diseased surfaces -Importance of defect configuration in surgical treatment -Biomechanical factors that influence the progression and decontamination related to peri-implantitis -Maintenance of implants.
차폐막 노출이 발치 후 치조제 보존술의 결과에 미치는 영향에 관한 임상적 연구
남현욱,박윤정,구기태,김태일,설양조,이용무,구영,류인철,정종평,Nam, Hyun-Wook,Park, Yoon-Jeong,Koo, Ki-Tae,Kim, Tae-Il,Seol, Yang-Jo,Lee, Yong-Moo,Gu, Young,Rhyu, In-Chul,Chung, Chong-Pyoung 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.3
Purpose: Following tooth extraction caused by severe periodontitis, alveolar ridge dimension lose their original volume. To reduce the alveolar ridge dimension, the ridge preservation technique has been introduced and tested in many clinical studies with membrane alone or membrane plus graft, achieving reduced ridge loss compared to extraction only. The aim of the present clinical study was to compare the post-extraction dimensional changes in the membrane exposure group to non-exposure group during healing period following ridge preservation technique. Methods: Ridge preservation was performed in 44 extraction sites. After extraction, deproteinized bovine bone mineral coated with synthetic oligopeptide (Ossgen-$X15^{(R)}$) or deproteinized bovine bone mineral (Bio-$Oss^{(R)}$) was implanted into the socket. A collagen membrane (Bio-$Gide^{(R)}$) was trimmed to cover the socket completely and applied to the entrance of the socket. Four clinical parameters were compared between baseline and 6 months. Results: During healing period, membrane exposure was observed at 19 sites. At the re-entry, hard newly formed tissue were observed at the ridge preservation site. The grafted socket sites were well preserved in their volume dimension. In both groups, horizontal ridge width was reduced and vertical height was increased. There were not statistically significant differences in horizontal (-1.32 mm vs -1.00 mm) and vertical ridge change (2.24 mm vs 2.37 mm at buccal crest, 1.36 mm vs. 1.53 mm at lingual crest) between two groups. Conclusions: The ridge preservation approach after tooth extraction effectively prevented resorption of hard tissue ridge in spite of membrane exposure during healing period.
민감성 치아에 대한 수산화인회석 함유 치약의 임상적 효과
김수환,박준범,이철우,구기태,김태일,설양조,이용무,구영,정종평,류인철,Kim, Su-Hwan,Park, Jun-Beom,Lee, Chul-Woo,Koo, Ki-Tae,Kim, Tae-Il,Seol, Yang-Jo,Lee, Yong-Moo,Ku, Young,Chung, Chong-Pyung,Rhyu, In-Chul 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.1
Purpose: The aim of this study was to compare the effectiveness of hydroxyapatite containing toothpaste with positive control toothpastes in reducing dentine hypersensitivity. Materials and methods: This clinical trial was a double-blind, randomized, parallel group comparison of two, namely hydroxyapatite containing toothpaste and strontium chloride containing toothpaste. A total of 55 subjects were included in this study. The subjects were given randomly assigned one of the two toothpastes after received tooth brushing instruction at baseline. Some clinical indices(PI, GI, PD), verbal rating score(VRS) for sensitivity to stimulus, the effect in relieving sensitivity and visual analogue scale(VAS) for sensitivity at baseline, week 2, week 4 and week 8 were assessed. All data were evaluated by intention-to-treat analysis. Results: Overall, PI and GI scores were significantly reduced compare baseline in all groups(p<0.05). In addition, there was significant difference in PI at 4 weeks and in GI at 4, 8 weeks between groups. The proportions of subjects relieved sensitivity were 70.4% in experimental group and 57.1% in control group at 8 weeks respectively. The VRS for sensitivity to three kinds of stimuli and VAS for sensitivity decreased according to time, there was no overall difference between two groups(p>0.05). Conclusion: This study demonstrated that the new hydroxyapatite containing toothpaste was similarly effective in reducing dentine hypersensitivity with pre-existing benchmark toothpaste.
유도장치가 부가된 진동회전방식 전동칫솔의 구강건강증진효과에 대한 조사연구
박윤수,이철우,함병도,구기태,김태일,설양조,이용무,류인철,구영,정종평,Park, Yun-Soo,Lee, Chul-Woo,Hahm, Byoung-Do,Koo, Ki-Tae,Kim, Tae-Il,Seol, Yang-Jo,Lee, Yong-Moo,Rhyu, In-Chul,Gu, Young,Chung, Chong-Pyoung 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.4
Purpose: This study was performed to evaluate the effect of powered toothbrush with a wireless remote display on the subjective and objective oral hygiene improvement. Methods: One hundred and fifteen subjects in healthy or mild gingivitis status between the ages of 20 and 90 were recruited and reviewed for study inclusion criteria. At first visit, 115 pre-screened subjects filled in the questionnaire form which consisted of demographic factors, behavioral factors (smoking, alcohol consumption), toothbrushing habits (brushing time and frequency), self-reported oral health status, and self-satisfaction. Baseline clinical indices (Plaque index, Gingival index) were also recorded by a periodontist. Subjects were instructed how to use powered toothbrush with a wireless remote display, and were provided with it. Thirty days after first visit, 90 subjects returned for the second assessment by self-reported questionnaire form and professional clinical checkup. Statistical analysis was performed using paired t-test for the difference between baseline and second visit data. The relationship among variables was examined with chi-square test and Fisher' s exact test. Results: Significant differences were not found on self-reported satisfaction related with sex, smoking, alcohol consumption (P<0.05). Self-reported tooth brushing habit was improved in the aspect of brushing time and frequency. Significant differences were found on the self-reported oral health status, self-satisfaction, and clinical indices between the baseline and second visit data (P<0.01). Clinical indices were significantly reduced after using powered toothbrush with a wireless remote display (P<0.01). No adverse reactions were reported during the study period. Conclusions: Powered toothbrush with a wireless remote display successfully promoted oral hygiene from the subjective and objective viewpoint after 30 days of home usage.
피브린 결합능을 가진 합성 펩타이드의 치주인대 세포에 대한 생물학적 영향
이주아,구영,박윤정,구기태,김태일,설양조,이용무,류인철,정종평,Lee, Ju-A,Ku, Young,Park, Yoon-Jeong,Koo, Ki-Tae,Kim, Tae-Il,Seol, Yang-Jo,Lee, Yong-Moo,Rhyu, In-Chul,Chung, Chong-Pyoung 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.1
Purpose: Fibronectin(FN), one of the major components of ECM, mediates wide variety of cellular interactions including cell adhesion, migration, proliferation and differentiation. In this study, we used synthetic peptides based on fibrin binding sites of amino-terminal of FN and evaluated their biologic effects on periodontal ligament(PDL) cells. Materials and methods: PDL cells were cultured on synthetic oligopeptides coated dishes and examined for cell adhesion, proliferation via confocal microscope. For detection of ERK1/2, cells were plated and Western blot analysis was performed. Results: PDL cells on synthetic oligopeptide coated dishes showed enhanced cell adhesion and proliferation. Western blot analysis revealed increased level of ERK1/2 phosphorylation in cells plated on FN fragment containing fibrin-binding domain(FF1 and FF5) coated dishes. Conclusion: These results reveals that FN fragment containing fibrin-binding domain possess an enhanced biologic effect of PDL ligament cells.
사람 치은 섬유아세포에서의 Tannerella forsythia 전세균, 막단백질, 당지질에 의한 염증성 사이토카인 발현
김정은,이성훈,최봉규,구기태,김태일,이용무,구영,정종평,류인철,Kim, Jung-Eun,Lee, Sung-Hoon,Choi, Bong-Kyu,Koo, Ki-Tae,Kim, Tae-Il,Lee, Yong-Moo,Ku, Young,Chung, Chong-Pyoung,Rhyu, In-Chul 대한치주과학회 2008 Journal of Periodontal & Implant Science Vol.38 No.3
Purpose: The purpose of this study was to investigate induction of cytokine expression in human gingival fibroblasts (HGFs) by whole cell and the components of T. forsythia. Material and Methods: After HGFs were treated with lipopolysaccharide (LPS), membrane protein isolated from T. forsythia or culture media of T. forsythia, the induction of interleukin (IL)-1, IL-6 and IL-8 was examined with real-time PCR and ELISA. Their induction ability of cytokines was compared with whole bacteria. Result: The expression of IL-6 and IL-8 was significantly induced in HGFs by whole bacteria and membrane protein. The expression of IL-$1{\beta}$ was induced by membrane protein of T. forsythia, not by whole bacteria. LPS and condition media of T. forsythia slightly activated HGFs. Conclusion: The membrane protein of T. forsythia could be one of virulence factors.
진민주,김영성,김수환,김경화,이철우,구기태,김태일,설양조,구영,류인철,정종평,이용무,Jhin, Min-Ju,Kim, Young-Sung,Kim, Su-Hwan,Kim, Kyoung-Hwa,Lee, Chul-Woo,Koo, Ki-Tae,Kim, Tae-Il,Seol, Yang-Jo,Ku, Young,Rhyu, In-Chul,Chung, Chong-Pyoung 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.2
Purpose: The aim of this study was to evaluate the stemness of cells from canine dental tissues and bone marrow. Methods: Canine periodontal ligament stem cells (PDLSC), alveolar bone stem cells (ABSC) and bone marrow stem cells(BMSC) were isolated and cultured. Cell differentiations (osteogenic, adipogenic and chondrogenic) and surface antigens (CD146, STRO-1, CD44, CD90, CD45, CD34) were evaluated in vitro. The cells were transplanted into the subcutaneous space of nude mice to assess capacity for ectopic bone formation at 8 weeks after implantation. Results: PDLSC, ABSC and BMSC differentiated into osteoblasts, adipocytes and chondrocytes under defined condition. The cells expressed the mesenchymal stem cell markers differently. When transplanted into athymic nude mice, these three kinds of cells with hydroxyapatite /${\beta}$- tricalcium phosphate (HA/TCP) carrier showed ectopic bone formation. Conclusions: This study demonstrated that canine dental stem cells have stemness like bone marrow stem cells. Transplantation of these cells might be used as a therapeutic approach for dental stem cell-mediated periodontal tissue regeneration.
고분자 기반 코팅형 상아질 지각 과민 처치제의 효과에 대한 비교 연구
노영훈(Young-Hoon Roh),이주연(Joo-Yeon Lee),박현정(Hyun-Jung Park),최차남(Cha-Nam Choi),박윤정(Yoon-Jeong Park),구기태(Ki-Tae Koo),김태일(Tae-Il Kim),설양조(Yang-Jo Seol),이용무(Yong-Moo Lee),구영(Young Ku),류인철(In-Chul Rhyu),정종평( 대한치과의사협회 2008 대한치과의사협회지 Vol.46 No.11
Purpose : The aim of this study was to evaluate the clinical efficacy of two commercially available desensitizing agents over 3 weeks on patients with dentin hypersensitivity. Materials and Methods : An oxalate-based solution, Sensblok (NIBEC Inc. Seoul, Korea) & Superseal (Pheonix Inc. Michigan, USA), and a distilled water placebo were compared in a clinical setting. Seven volunteers exhibiting three or more teeth that were sensitive to tactile & air were enrolled in the study (35 teeth total). A visual analog scale (VAS) was used for recording each patient s level of sensitivity to tactile & air stimuli. A Florida probe was rubbed across the exposed dentin three times with a constant pressure 20 grams to measure the tactile stimulus. The air stimulus was generated by dental unit air syringe for 1-second blast from 1/2 inch distance. The desensitizing agents were applied according manufacture s guideline. VAS scores were recorded at baseline, 1 minute after treatment, at 1 week, 2weeks, 3weeks. VAS score were analyzed using a repeated measures ANOVA (α=0.05). Results : The Sensblok, Superseal, and distilled water placebo all decreased dentin sensitivity. A statistically significant difference existed between Sensblok and placebo when tactile stimulus was applied (P<0.05), but no significant difference was found among other desensitizing agents and tactile and air stimuli.