• Journal of Periodontal and Implant Science
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• 제47권1호
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• pp.13-19
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• 2017

Purpose: The purpose of this study was to examine whether periodontal pocket could be satisfactorily visualized by optical coherence tomography (OCT) and to suggest quantitative methods for measuring periodontal pocket depth. Methods: We acquired OCT images of periodontal pockets in a porcine model and determined the actual axial resolution for measuring the exact periodontal pocket depth using a calibration method. Quantitative measurements of periodontal pockets were performed by real axial resolution and compared with the results from manual periodontal probing. Results: The average periodontal pocket depth measured by OCT was $3.10{\pm}0.15mm$, $4.11{\pm}0.17mm$, $5.09{\pm}0.17mm$, and $6.05{\pm}0.21mm$ for each periodontal pocket model, respectively. These values were similar to those obtained by manual periodontal probing. Conclusions: OCT was able to visualize periodontal pockets and show attachment loss. By calculating the calibration factor to determine the accurate axial resolution, quantitative standards for measuring periodontal pocket depth can be established regardless of the position of periodontal pocket in the OCT image.

• 대한치과의사협회지
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• 제55권1호
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• pp.22-29
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• 2017

Purpose : Preservation of the periodontal health of the treated patient requires supportive periodontal therapy for the elimination of periodontal disease. After Phase I therapy is completed, patients are placed on a schedule of periodic recall visits for maintenance care to prevent recurrence of the disease. The amount of tooth loss would be the most relevant criterion in an evaluation of the effect of periodontal treatment, but this would require studies with extremely long follow-up periods. Thus the most commonly used outcome criteria in clinical research have been clinical attachment level change, reduction of pocket depth and bleeding frequency. The purpose of this case study is to identify the effect of supportive periodontal therapy after periodontal flap surgery. Materials & Methods : Following routine hygienic phase of treatment, patients with chronic periodontitis received surgical periodontal treatment. Bleeding on probing, pocket depth and clinical attachment level were measured at baseline, pre-operation and 1 year follow up. All procedures were performed by one operator. Results : One year a total of 28 patients (58sites) to recheck remained, when conducted maintenance program after periodontal flap surgery was observed reduction of bleeding frequency, pocket depth and improvement of clinical attachment level. Conclusion : The results from this study indicate that supportive periodontal therapy after periodontal flap surgery is effective for reduction of bleeding frequency, pocket depth and gain of clinical attachment level.

• 대한치위생과학회지
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• 제5권2호
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• pp.13-24
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• 2022

Background: This study was aimed at investigating the perception of the requirement of measuring the periodontal pocket depth of the dental hygiene students in the mock national board examination. Methods: SPSS 25.0 (IBM SPSS Statistics) was used to perform the independent t-test for the recognition level of dental hygiene students in the interdisciplinary practical national board examination. A p-value < 0.05 was set to indicate statistical significance. Results: Participants showed a high recognition level for the requirement of measuring the periodontal pocket depth without any difference among disciplines. When periodontal pocket depth measurement was included in the national board examination, the educational and clinical work of dental hygienists was expected to be unified, and the professionalism of dental hygienists was expected to be strengthened. Conclusion: The results of this study suggest that the feasibility of introducing periodontal pocket depth measurement in the practical national board examination for dental hygienists should be reviewed by a group of experts.

• Journal of Periodontal and Implant Science
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• 제51권4호
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• pp.239-253
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• 2021

Purpose: The single-flap approach (SFA) is a minimally invasive technique with limited mucoperiosteal flap elevation to gain access to the buccal/palatal aspects, thus limiting post-surgical complications. The purpose of the present study was to gain insights into the impact of the SFA over the double-flap approach (DFA) on periodontal flap treatment outcomes and patient compliance in terms of discomfort and time taken for surgical procedures. Methods: Twenty patients with persistent probing pocket depths of ≥5 mm were scheduled for the SFA (test site) and for the DFA (control site). All the clinical periodontal parameters were recorded at baseline, 3 months, and 6 months. Radiographic bone level (cone-beam computed tomography) was evaluated at baseline and 6 months. Patients' postoperative pain perception and wound healing were also assessed. Results: The SFA showed a significant reduction in periodontal pocket depth, gain in clinical attachment level (CAL), and gain in bone level when compared with the DFA. The SFA substantially improved wound healing and induced less postoperative pain than the DFA. Conclusions: The SFA resulted in substantial improvement in the composite outcome measures, as shown by a reduction in pocket depth with minimal gingival recession, gain in CAL, early wound healing, less postoperative discomfort, and better patient-centered outcomes.

• 대한치과의사협회지
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• 제22권11호통권186호
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• pp.961-971
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• 1984

The purpose of this study was designed to evaluate the existence of the junctional epithelia on the tooth surface in periodontal pocket, and what were the morphologic differences between the junctional epithelia on the healthy and advanced periodontitis tooth. Fifteen premolar teeth from patients of Yon Sei University, Dental Infirmary were selected for this study. After extration, the teeth were prepared and examined in Scanning electro microscope. The results were as follows. 1. The junctional epithelia from healthy tooth surface were irreguraly round, oval, polygonal and slightly elongated while those from periodontal pocket were so elongated that difficult to distinguished the individual cell boundary. 2. There were a lot of round space so called 'HOLE or WHORL' which seemed tunnel in periodontal pocket with advanced periodontitis. 3. Microvilli were going to destructed and disappeared on surfaces of junctional epithelia in periodontal pocket with advanced periodontitis. 4. There were a lot of Filopodia on Junctional epithelia from healthy surfaces. %. Junctional epithelia from periodontal pocket with advanced periodontitis contained more inflammatory cells than healthy junctional epithelia did.

• 치위생과학회지
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• 제10권2호
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• pp.117-122
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• 2010

본 연구는 일개 대학 치위생과 스켈링센터에 방문한 환자 177명을 대상으로 흡연 및 음주와 치주질환과의 관련성에 관한 후속연구가 지속적으로 진행되어야 할 필요성이 있다고 사료되어 치주낭 측정과 설문지를 이용하여 조사하였고, 흡연 및 음주여부와 치주질환의 관련성을 분석하여 얻은 결과는 다음과 같다. 1. 성별에 따른 치주낭 보유 분악수는 남자와 여자 모두 1.09로서 유의한 차이가 없었다. 2. 연령에 따른 치주낭 보유 분악수는 19세 이하 0.81, 20-29세 1.08, 30세 이상 2.46으로 연령이 증가됨에 따라 유의하게 높게 나타났다(p<0.01). 3. 결혼여부에 따른 치주낭 보유 분악수는 기혼 2.42로 미혼 0.98보다 유의하게 높게 나타났다(p<0.05). 4. 경제적 상태에 따른 치주낭 보유 분악수는 '상' 1.68, '중' 1.15, '하' 0.68로서 경제적 상태가 어렵다고 생각할수록 낮았지만 유의하지 않았다. 5. 흡연여부에 따른 치주낭 보유 분악수는 흡연자 1.11로서 비흡연자 1.07보다 유의하게 높았다(p<0.05). 6. 음주여부에 따른 치주낭 보유 분악수는 음주자 1.03 으로서 비음주자 1.24보다 낮게 나타났으나 유의하지 않았다. 7. 치주낭 보유 분악수에 유의한 영향을 미치는 독립변수는 연령, 결혼상태, 흡연여부로 나타났다. 결론적으로 흡연은 치주질환과 관련성이 있다는 결과를 도출하여 기존연구의 연장선상에 있지만 음주와 치주질환의 연관성은 없는 것으로 또 다른 연구결과를 나타냈다. 이로써 구강보건전문가는 환자들에게 구강건강을 유지 및 증진시키기 위해서 금연지도가 필수로 이루어져야할 것이며, 지속적인 관리를 위해서는 금연상담프로그램이 마련되어야 할 것이다.

• Journal of Periodontal and Implant Science
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• 제28권2호
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• pp.193-203
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• 1998

20 Subjects with clinical diagnosis of adult periodontitis with sites having average pocket depth of 4mm were selected for the study. After scaling and root planing of those sites, 30% minocycline-HCI contained in biodegradable device were inserted in one group, scaling and root planing was carried out in another group and the last group was without any periodontal treatment. the difference between the group was detemined by pocket dept, bleeding on prbing, attachment level, distribution of subgingval plaque bacteria. Conclusion was made for the comparisons between baseline and 4 week and the groups. 1. In analysis of pocket depth, there was significant sifference in scaling and root planing group only. 2. Both the scaling and root planing group and minocycline group showed significant decrease in bleeding on probing. 3. There was significant increase in the attachment level in scaling and root planing group, but no difference was foundbetween the groups. 4. There was significant decrease in the total number of subgingival bacteria in all groups and the number of motile bacteria decreased significantly in the minocycline group. These result indicate that insertion of Minocycline-HCI at the base of periodntal pocket was useful as an additional aid of mechanical trarment at the point of periodontal pocket, bleeding on probing, attachment level, microbial distribution.

• Journal of Periodontal and Implant Science
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• 제52권5호
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• pp.383-393
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• 2022

Purpose: Aloe-emodin (AE), a natural anthraquinone abundant in aloe plants and rhubarb (Rheum rhabarbarum), has long been used to treat chronic inflammatory diseases. However, AE's underlying mechanisms in periodontal inflammation have not been fully elucidated. Acidic mammalian chitinase (AMCase) is a potential biomarker involved in bone remodeling. This study aimed to evaluate AE's effect on periodontitis in rats and investigate AMCase expression. Methods: Eighteen Sprague-Dawley rats were separated into the following groups: healthy (group 1), disease (group 2), vehicle (group 3), AE high-dose (group 4), and AE low-dose (group 5). Porphyromonas gingivalis ligatures were placed in rats (groups 2-5) for 7 days. Groups 4 and 5 were then treated with AE for an additional 14 days. Saliva was collected from all groups, and probing pocket depth was measured in succession. Periodontal pocket tissues were subjected to histomorphometric analysis after the rats were sacrificed. Bone marrow-derived macrophages and murine macrophages were stimulated with receptor activator of nuclear factor-κB ligand (RANKL) and treated with different concentrations of AE. AMCase expression was detected from the analysis of saliva, periodontal pocket tissues, and differentiated osteoclasts. Results: Among rats with P. gingivalis-induced periodontitis, the alveolar bone resorption levels and periodontal pocket depth were significantly reduced after treatment with AE. AMCase protein expression was significantly higher in the disease group than in the healthy control (P<0.05). However, AE inhibited periodontal inflammation by downregulating AMCase expression in saliva and periodontal pocket tissue. AE significantly reduced RANKL-stimulated osteoclastogenesis by modulating AMCase (P<0.05). Conclusions: AE decreases alveolar bone loss and periodontal inflammation, suggesting that this natural anthraquinone has potential value as a novel therapeutic agent against periodontal disease.

• 한국치위생학회지
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• 제16권2호
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• pp.225-231
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• 2016

Objectives: The purpose of this study was to investigate the influential factors of stress and fatigue on peridontal indicators in patients with periodontal disease. Methods: A self-administrated questionnaire study was conducted during November 2012 to January 2013 with 140 periodontal patients. The Fatigue and Stress were evaluated with Multidimensional Fatigue Scale(MFS) and Psychosocial Well-bing Index(PWI). Periodontal health indicators were consisted with gingival index and pocket depth. Data were analyzed by descriptive analysis, t-test, ANOVA, and multiple regression analysis. Results: Overall stress and fatigue level of subjects were $22.61{\pm}5.62$ and $64.67{\pm}9.45$. Gingival index and periodontal pocket depth as periodontal health indicators were $1.26{\pm}0.3$ and $4.29{\pm}0.52$. The influential factors of gingival index and periodontal pocket depth were social function(subcategory of pwi) and depression(subcategory of pwi), respectively. Conclusions: Some subcategories of PWI were related with periodontal health indicators. So, consideration of stress related with depression and social function are needed to manage and prevent periodontal disease.

• Journal of Periodontal and Implant Science
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• 제23권3호
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• pp.442-453
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• 1993

In order to determine the relationship between probing pocket depth and trypsin-like activity in subgingival plaque, probing pocket depth and loss of attachment were measured by Michigan-O probe on mandibular incisors of 30 patients with adult periodontitis. And the trypsin-like activity of Treponema denticola, Porphyromonas gingivalis, and Bacteroides forsythus was evaluated by the hydrolysis of N-Benzoyl-DL-Arginine-2-Naphthyla-mide (BANA) using PerioScan reagent cards(Oral-B Laboratories, Redwood City, CA). The obtained data were statistically analyzed by Microstat program. The results were as follows. 1. The number of teeth showing negative trypsin-like activity was more in shallow periodontal pocket groups, but the number of teeth showing positive trypsin-like activity was more in deep periodontal pocket groups. 2. There was a significant positive correlation between probing pocket depth and trypsin-like activity in subgingival plaque(y=0.413X - 0.955, r = 0.7024, p<0.001). 3. There was no consistent relationship between loss of attachment and trypsin-like activity in subgingival plaque(p>0.01).