• Journal of Periodontal and Implant Science
• /
• 제29권3호
• /
• pp.553-560
• /
• 1999

The aim of the present study was to evaluate the effect of the expanded polytetrafluoroethylene (e-PTFE) membrane exposure on the initial healing of the periodontal tissue in guided tissue regeneration (GTR) procedure. 90 sites selected from 90 patients were treated with gingival flap surgery supported by an e-PTFE membrane. The material included angular bony defects with probing attachment loss of > 5mm or degree II furcation involvement. Treated sites were classified with membrane exposure group and non-exposure group at membrane removal and evaluated healing type. The results were obtained as follows. 1. e-PTFE membrane was exposed at 61 sites (67.8%) among 90 sites. 2. Thirteen sites (14.4%) depicted rapid healing type, 65 sites (72.2%) depicted typical healing type, 9 sites (10%) showed delayed healing type and 3 sites (3.3%) were categorized as adversed healing type. 3. In e-PTFE membrane exposure group, 1 site (1.6%), 51 sites (83.6%), 6 sites (9.8%) and 3 sites (4.9%) showed rapid healing type, typical healing type, delayed healing type and adverse healing type respectively. 4. In e-PTFE membrane non-exposure group, 12 sites (41.3%), 14 sites (48.3%) and 3 sites (10.3%) showed rapid healing type, typical healing type and delayed healing type respectively. Adverse healing type was not observed. 5. The rate of favourable healing between e-PTFE membrane exposure group and non-exposure group was not statistically significant(p=0.56). These results suggest that the prevention of membrane exposure may be important to obtain rapid healing type. However favourable healing could be obtained with stringent infection control program even if membrane was exposed.

• Journal of Periodontal and Implant Science
• /
• 제23권3호
• /
• pp.475-492
• /
• 1993

The effect of synthetic bone materials was assessed in the patients with pure periodontal class II and III furcation defects. The buccal aspects of the maxillary and mandilular first and second molars were surgically exposed, and synthetic bone materials were interposed between the gingival flap and the furcation defects in the experimental group. The control group were treated without the use of synthetic bone materials by same operator. Probing pocket depth, gingival recession, and loss of attachment, were measured by Michigan O-probe and tooth mobility was evaluated by an electronic mobility tester(Periotest(R), Siemens co. Germany) at preoperation and 3-, 6-, and 12-month postoperation. Standardized radiogrphs were taken at preoperation and 6-month and 12-month postoperation. The postoperative change of clinical parameters and the difference between experimental group and control group were statistically analyzed by Student, t-test. The results were as follows: 1. The probing pocket depth at the 3-, 6-, and 12-month postoperative examination was significantly decreased, compared to that at preoperative examination in both experimental group and control group(P<0.005), but there was no significantly difference between experimental group and control group. 2. The amount of gingival recession at the 3-, 6-, and 12-month postoperative examination was increased, compared to that at the preoperative examination in both experimental and control group(P<0.005). In the case of the class III furcation involvement, the amount of gingival recession at the 3-, 6-, and 12-month postoperative examination was more significantly increased in control group than experimental group(P<0.05). 3. The amount of loss of attachment at the 3-, 6-, and 12-month postoperative examination was significantly decreased, compared to that at the preoperative examination in both experimental and control group in the case of class II furcation involvement, and in experimental group only in the case of furcation III involvement(P<0.005). The amount of loss of attachment at, the 3-, 6-, and 12-month postoperative examination was more significantly decreased in experimental group than control group in the case of the class III furcation involvement(P<0.05), but in the case of class II furcation involvement there was no significant difference between experimental group and control group. 4. The tooth mobility at the 3-, 6-, and 12-month postoperative examination was significantly decreased, compared to that at the preoperative examination in both experimental and control group(P<0.005), but there was no significant difference between experimental group and control group. 5. Radiopacity of furcation area was greatly increased in the experiment group, but there was no radiographic change in the control group.

• Imaging Science in Dentistry
• /
• 제47권1호
• /
• pp.17-24
• /
• 2017

Purpose: The purpose of this study was to assess the accuracy, sensitivity, and specificity of the diagnosis of incipient furcation involvement with periapical radiography (PR) and 2 cone-beam computed tomography (CBCT) imaging protocols, and to test metal artifact interference. Materials and Methods: Mandibular second molars in 10 macerated pig mandibles were divided into those that showed no furcation involvement and those with lesions in the furcation area. Exams using PR and 2 different CBCT imaging protocols were performed with and without a metallic post. Each image was analyzed twice by 2 observers who rated the absence or presence of furcation involvement according to a 5-point scale. Receiver operating characteristic (ROC) curves were used to evaluate the accuracy, sensitivity, and specificity of the observations. Results: The accuracy of the CBCT imaging protocols ranged from 67.5% to 82.5% in the images obtained with a metallic post and from 72.5% to 80% in those without a metallic post. The accuracy of PR ranged from 37.5% to 55% in the images with a metallic post and from 42.5% to 62.5% in those without a metallic post. The area under the ROC curve values for the CBCT imaging protocols ranged from 0.813 to 0.802, and for PR ranged from 0.503 to 0.448. Conclusion: Both CBCT imaging protocols showed higher accuracy, sensitivity, and specificity than PR in the detection of incipient furcation involvement. Based on these results, CBCT may be considered a reliable tool for detecting incipient furcation involvement following a clinical periodontal exam, even in the presence of a metallic post.

• 한국치위생학회지
• /
• 제17권5호
• /
• pp.747-755
• /
• 2017

Objectives: The purpose of study is to investigate periodontal disease-related recognition and oral health-related behavior in orthodontic patients with fixed appliance. Methods: A self-reported questionnaire was completed by 286 orthodontic patients with fixed appliance in Gwangju, Jeonnam from September 1 to September 27, 2016. The questionnaire consisted of general characteristics (3 items), orthodontic related characteristics (3 items), knowledge of periodontal disease (3 items), and oral health-related behavior (4 items). The data were analyzed by frequency analysis, percentage and chi-square analysis using SPSS 21.0 program. Results: 62.8% had experiences of dental treatment and 67.5% had intention of involvement on incremental care program in orthodontic treatment periods. Accuracy rate of cause about periodontal disease was high in female and case of acquiring information experiences on periodontal disease (p<0.05). 67.2% performed correct toothbrushing for the management of periodontal disease in the experiences of acquiring information on periodontal disease in orthodontic treatment periods (p<0.05). The proportions of using interdental toothbrush and mouth rinsing solutions were high among those over 20 years old and students in the subjects (p<0.05). Conclusions:The accuracy rate were high in the answers about cause and management of periodontal disease in case of acquiring information experiences on periodontal disease in orthodontic treatment periods. Therefore, there is a need to further development and implementation of dental hygiene intervention program for periodontal disease care with fixed orthodontic appliances in that regard.

• 구강회복응용과학지
• /
• 제39권1호
• /
• pp.1-8
• /
• 2023

목적: 이 연구의 목적은 치주질환자를 대상으로 치주판막술 시행 5년 후 치아의 상실여부를 파악한 뒤 치아 상실과 관련된 예후 요인을 분석하는 것이다. 연구 재료 및 방법: 2017년 1월부터 12월까지 치주치료를 시행한 22명의 환자, 124개의 치아를 대상으로 하였다. 치아 관련요인은 치료 당시에 수술을 진행한 술자에 의해 임상적으로 기록된 요인으로 치주수술 당일 최대 치주낭 깊이, 치근의 수, 치근 이개부 이환, 근관치료 여부, 보철상태를 기록하였다. 내원 당시의 초진 기록을 기준으로 환자관련 요인은 성별, 나이, 흡연 여부, 첫 내원 당시 치주질환으로 상실된 치아 여부, 당뇨병 이환 여부, 5년간 유지관리 응답도가 있으며 각각 요인들을 기록하였다. 각각의 요인들의 치아 상실 여부와 관련한 영향력을 평가하였다. 결과: 치아 관련요인이 발치에 미치는 영향력을 살펴본 결과 최대 치주낭 깊이, 골 소실, 치근 이개부 이환 중 치주낭 깊이(P : 0.000), 골 소실(P : 0.021)이 발치에 유의미한 영향을 미치는 것으로 나타났다. 특히, 최대 치주낭 깊이의 영향력이 가장 높은 것으로 나타났다. 환자 관련 요인은 치아발치에 유의한 결과를 보이지 않았다. 결론: 치주판막술을 시행한 환자에서 골 소실, 최대 치주낭 깊이가 치아 상실과 관련하여 통계적으로 유의성 있는 예후 요인으로 작용하였다.

• Journal of Oral Medicine and Pain
• /
• 제1권1호
• /
• pp.8-13
• /
• 1973

The authors had studied the oral environmental changes by salivary salivary pH, amount, periodontal Index in patient with active pulmonary tuberculosis patients. Among the subjects, The experimental group was consisted of 100 patients (50 males and 50 females) of 20-29 years and 100 persons of control group (50 males and 50 females) of 20-29 years. The measurement of salivary amount was performed with wide mouthed plastic (2 Inches) bottle for avoidance of Ionization of SiO2 by using of glass bottle and salivary pH was checked by pH meter 27 radiometer Copenhagen. The results are as follows : 1. The slivary pH does not appear to be characteristic of tuberculous paticents. 2. The obtained salivary amount indicated no significant to the tuberculous patients as compared to the obtained supposedely wealthg individuals. 3. The Russel Index wasfound higher and there had found more periodontal involvement(3 times than normal) in the experimental group.

• Journal of Oral Medicine and Pain
• /
• 제46권2호
• /
• pp.63-68
• /
• 2021

Mucous membrane pemphigoid (MMP) is a heterogeneous group of chronic, autoimmune subepithelial blistering diseases, predominantly involving oral mucosal membrane. Because of its pathophysiology of autoimmune reaction, MMP-related gingivitis would not respond to conventional periodontal treatments. We present a case of a 65-year-old female with a chief complaint of chronic generalized buccal gingivitis, unimproved after periodontal treatment for four months. Based on the clinical findings, histological examination, and direct immunofluorescence microscopy, it was diagnosed as MMP. The symptoms were relieved with immunomodulatory therapy using corticosteroids and the supportive management of professional plaque control. MMP can cause pathological involvement throughout the oral and other mucosae of the body, thus leading to functional impairment through repeated inflammatory cascades. Therefore, accurate diagnosis is essential to properly manage local and possible systemic complications of MMP.

• 대한치과의사협회지
• /
• 제50권4호
• /
• pp.196-202
• /
• 2012

Radiographic diagnosis of periapical lesions is based on many factors, including anatomical limitations such as thickness of the cortical bone; positioning of the apical abscess to the cortical bone; and is complicated by proximity to other anatomical structures and neighboring teeth. With conventional radiographs, these structures are often superimposed. Dental CBCT with its associated geometric accuracy offers accurate visualizations of the complex relationships and boundaries between teeth, related anatomical features, and their associated pathology. Its images also provide us internal tooth morphology, periodontal ligament space, the presence or absence of periapicl lesions in association wi th critical anatomical structures and maxillary sinus involement. Using 3 D imaging makes it easier for clinicians to detect, diagnosis, and develop highly effective treatment plans. Now, 4 cases of periapical and periodontal pathosis with CBCT images are to be presented including periapical abscess, furcation involvement, periapical pathosis involving maxillary sinus, and osteomyelitis. CBCT analyze specific area of interest and provides the highly detailed anatomical information. It also facilitates earlier and more accurate diagnosis, and treatment planning decisions and more predictable outcome.

• 치위생과학회지
• /
• 제19권4호
• /
• pp.254-260
• /
• 2019

Background: The primary aims of periodontal disease treatment is to remove dental plaque and calculus, the main causes of tooth loss, and restore periodontal tissue destroyed by inflammation. Periodontal disease treatment should also help maintain the alveolar bone, alleviate inflammation, and promote periodontal ligament cell proliferation, which is essential for tissue regeneration. Conventional antibiotics and anti-inflammatories have adverse side effects, especially during long-term use, so there is a need for adjunct treatment agents derived from natural products. The purpose of this study was to investigate whether the herbal flavone baicalein has the osteogenic activity under inflammatory conditions, and assess the involvement of osteoblast immediate early response 3 (IER3) expression. Methods: Human osteoblastic MG-63 cells were cultured with the pro-inflammatory cytokines tumor necrosis factor α and interleukin 1β in the presence and absence of baicalein. Proliferation was assessed using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide assay, and expression of IER3 mRNA was assessed using real-time polymerase chain reaction. The expression of IER3 protein levels and activation of associated signal transduction pathways were assessed using western blotting. Results: Baicalein increased IER3 mRNA and protein expression synergistically. In addition, baicalein reversed the suppression of cell proliferation, and the downregulation of osteogenic transcription factor runt-related transcription factor 2 and osterix induced by pro-inflammatory cytokines. Baicalein also upregulated the phosphorylation of c-Jun N-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK 1/2). The upregulation of IER3 by pro-inflammatory cytokines was blocked by pretreatment with inhibitors of AKT, p38, JNK, and ERK 1/2. Conclusion: Baicalein mitigates the deleterious responses of osteoblasts to pro-inflammatory cytokines. Further, IER3 enhanced the effect of baicalein via activation of AKT, p38, JNK, and ERK pathways.

• Restorative Dentistry and Endodontics
• /
• 제36권3호
• /
• pp.238-242
• /
• 2011

구개치은발육구는 상악 전치에 나타나는 이상 치근 형태의 하나로 구개측 결절부에서 구개치은발육구를 관찰하였으며, 이 구는 치근단을 향하여 여러 깊이와 길이로 연장될 수 있다. 구개치은발육구는 세정되기 어렵고 청결이 불가능하여, 치태와 치석 등이 축적되어 접합상피의 파괴를 일으키고 빠르게 골연하 결손부가 발생할 수 있다. 또한 이차적으로 치수 조직을 이환시켜 근관-치주 병소가 발생할 수 있다. 본 증례 보고는 구개치은발육구로인해 근관 문제까지 야기된 임상증례를 보고하고 근관치료와 함께 여러가지 재료를 이용한 구개치은발육구의 치료결과를 관찰함으로써 이러한 치료방법의 효용성을 평가하고자 하였다.