간행물

Oral Biology Research (OBR) update

  • : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소)
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수록정보
수록범위 : 1권0호(1978)~45권1호(2021) |수록논문 수 : 1,447
Oral Biology Research (OBR)
45권1호(2021년 03월) 수록논문
최근 권호 논문
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KCI등재

1Analysis of reasons for extracting permanent teeth among Korean adults with oral diseases

저자 : Jae-joon Byun , Eun-sun Jang , Dae-ryong Kong , Gyeong-je Lee

발행기관 : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소) 간행물 : Oral Biology Research (OBR) 45권 1호 발행 연도 : 2021 페이지 : pp. 1-6 (6 pages)

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This study aimed to analyze the main reasons for the extraction of permanent teeth among Koreans with oral diseases. The electronic medical record data for past 10 years was used in a target population comprising of 26,795 adults diagnosed with oral disease and scheduled to undergo permanent tooth extraction. The oral diseases were classified into periodontal disease, dental caries, impacted teeth, prosthodontic treatment, orthodontic treatment, tooth fracture, trauma, and others. The relationship between these diseases and permanent tooth extraction was analyzed. Permanent teeth were extracted due to periodontal disease (34.5%), dental caries (26.6%), and tooth impactions (22.3%). Permanent teeth were extracted as the cause of dental caries (28.6%) and periodontal disease (45.9%) from patients in 26-35 and 46-55 years of age respectively. The mandibular first molars (17.2%), mandibular second molars (16.0%), maxillary first molars (14.7%), and maxillary second molars (14.3%) were extracted due to dental caries. The incidence of periodontal disease was highest in the mandibular central incisor (72.6%; p<0.05). These findings indicated that periodontal disease was the chief cause of extraction of permanent teeth among Korean adults.

KCI등재

2Finite element analysis of stress distribution around a short implant according to a horizontally reduced bone in the mandible

저자 : Kyeong-ok Lim , Kyung-min Kim , Min-cheol Yang , Hee-jung Kim , Won-pyo Lee , Byung-ock Kim

발행기관 : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소) 간행물 : Oral Biology Research (OBR) 45권 1호 발행 연도 : 2021 페이지 : pp. 7-15 (9 pages)

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This study evaluates the stress distribution around a short implant supporting a bone with various horizontally reduced levels using a three-dimensional finite element stress analysis. A three-dimensional finite element model was designed by placing a short implant in a jaw model with a 2-mm-thick cortical bone. Horizontal bone loss was employed at 1-mm intervals from 0 to 3 mm, and a 400- N load was applied to the central fossa in a 0° vertical direction and 30° inward-inclined direction to the implant axis. Furthermore, the maximum principal stress generated in the short implant supporting the bone was calculated using a three-dimensional finite element stress analysis. As a result of the finite element analysis, the maximum principal stresses in a 0° vertical direction according to horizontal bone loss from 1 mm to 3 mm in the cortical bone were 45.13, 79.44, and 75.53 (MPa), respectively, and in the cancellous bone were 7.63, 9.28, and 9.60 (MPa), respectively. The maximum principal stresses in a 30° inward-inclined direction according to horizontal bone loss from 1 mm to 3 mm in the cortical bone were 132.34, 172.07, and 216.26 (MPa), respectively, and in the cancellous bone were 16.34, 27.43, and 26.37 (MPa), respectively. Within the limitations of this study, the authors concluded that the bone stress values tended to be higher around the implant neck under a 30° inward load and in the cortical bone according to the horizontally reduced bone level.

KCI등재

3Comparison of various activation methods of root canal irrigants for soft-tissue removal

저자 : Kun-hwa Sung , Tae-young Park , Ho-keel Hwang , Hyoung-hoon Jo

발행기관 : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소) 간행물 : Oral Biology Research (OBR) 45권 1호 발행 연도 : 2021 페이지 : pp. 16-21 (6 pages)

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The aim of this study was to evaluate the effects of various activation methods on the efficiency of soft-tissue removal in the artificial root canal system. The artificial root canal system, including the isthmus, was fabricated using poly (methyl methacrylate). Grounded pork was filled in the isthmus, soaked with NaOCl for 5 minutes, and followed by various irrigation and activation procedures. Group 1 performed irrigation using a side-vented needle and syringe, and group 2 performed sonic activation using an activator. Furthermore, group 3 performed ultrasonic activation using EndoSonic PS tip with EMS scaler engine. Subsequently, the time taken for the complete removal of grounded pork from the isthmus was measured. The sonic and ultrasonic activation groups showed significantly higher irrigation efficacy than those without activation. The ultrasonic activation group showed a higher efficiency when compared with the sonic activation group. In conclusion, additional activation of irrigants can improve the efficiency of soft-tissue removal in anatomical structures, such as the isthmus.

KCI등재

4Thermoluminescent dosimetry of panoramic radiography

저자 : Yo-seob Seo , Sun-kyoung Yu

발행기관 : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소) 간행물 : Oral Biology Research (OBR) 45권 1호 발행 연도 : 2021 페이지 : pp. 22-28 (7 pages)

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This study aims to calibrate a thermoluminescence dosimeter (TLD) using a diagnostic radiation device and evaluate the dose of panoramic radiography. TLD-100s were calibrated using a solid-state dosimeter (Unfors Mult-O-Meter 512L; Unfors Instruments, Billdal, Sweden) and a diagnostic radiation device (HDT-500R; Hyun Dai Medical X-ray Co., Paju, Korea). Forty eight TLDs were placed in 24 sites of a head and neck phantom of a male (ART-210; Radiology Support Devices Inc., Long Beach, CA, USA), and panoramic radiation was performed under exposure parameters of 70 kVp and 10 mA using a ProMax (Planmeca, Helsinki, Finland). Using the International Commission on Radiological Protection (ICRP) 2007 recommendation, the effective dose of panoramic radiography was calculated from the absorbed doses of the tissues of the 24 TLD sites in a head and neck phantom. The absorbed dose of the TLD site was higher in the parotid gland (right: 1854.4 µGy, left: 1788.9 µGy) and lower in the calvarium anterior (3.8 µGy). The effective dose was calculated at 28.4 µSv. The cancer and heritable risks were 1.56×10-6 and 5.67×10-8, respectively. The TLD was calibrated using a diagnostic radiographic device, and the panoramic radiographic dose was evaluated. The findings of this study could be helpful in future dose studies.

KCI등재

5Digitally guided surgery and prosthesis with narrow implants in the anterior region

저자 : Jae-seok Kang , Seon-a Kim , Yu-ri Heo , Mee-kyung Son

발행기관 : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소) 간행물 : Oral Biology Research (OBR) 45권 1호 발행 연도 : 2021 페이지 : pp. 29-40 (12 pages)

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The purpose of this case report is to introduce a flapless method of securely placing a narrow implant on the upper and lower anterior teeth missing area with narrow bone width using a digitally guided surgery system and to introduce a process of prosthesis manufacturing using an oral scanner without a working model. The narrow implants in this case report remained stable for a certain period of time (12, 24, and 36 months after surgery) without loss of the surrounding bones.

KCI등재

6Treatment of a tooth with furcation involvement and extensive alveolar bone resorption due to endodontic-periodontal combined lesion using root resection: a case report

저자 : Youn-kyung Choi , So-yeun Kim , Hye-mi Jeon , Kyoung-hwa Jung , Na-rae Choi , Ji-young Joo , Hyun-joo Kim , Eun-young Kwon

발행기관 : 조선대학교 치의학연구원(구 조선대학교 구강생물학연구소) 간행물 : Oral Biology Research (OBR) 45권 1호 발행 연도 : 2021 페이지 : pp. 41-48 (8 pages)

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Due to the complex anatomical structure of the molar, endodontic-periodontal combined lesions often occur, resulting in furcation involvement and extensive alveolar bone resorption. When endodontic-periodontal combined lesions occur through the apical foramen and the periodontal tissue is destroyed up to the furcation, root canal therapy after a surgical periodontal treatment is performed if necessary. However, if a normal healing process does not occur after conventional treatment, root resection, which removes only the affected root that is the source of infection, may be a good alternative. The purpose of this study is to report a case of the maxillary molar with furcation involvement and extensive alveolar bone resorption due to an endodontic-periodontal combined lesion that had been preserved by root resection.

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(2006)홍길동 외 1명심리학41회 피인용

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