https://oak.chosun.ac.kr/handle/2020.oak/18952 2026-04-09T20:29:06Z 2026-04-09T20:29:06Z Sang-hwan Oh Na-ri Shin Soo-jeong Hwang https://oak.chosun.ac.kr/handle/2020.oak/19036 2024-04-30T02:03:01Z 2017-12-31T15:00:00Z

Title: Analysis of online questions about dental hygienist: Case report in Naver Intelligent Network Author(s): Sang-hwan Oh; Na-ri Shin; Soo-jeong Hwang Abstract: Current trends note that individuals utilize the information provided through online knowledge search services, to solve their curiosity for news and world events, as well as to read information written by others and acquire new knowledge on a variety of subjects. The purpose of this study was to analyze the questions about dental hygienists, in an effort to know which information they would want to gain through a web-based question and answer service. The questions were available through the service from October 2002 to March 2017, and it was through the web-based question-answer service in Naver that is called knowledge iN which was searched, using the key words of chigwawiseangsa and chiwiseangsa in the Korean language. As a result, there were a total of 1693 questions about the profession of the dental hygienist occupation which were extracted and analyzed. In particular, it was noted that the high school students asked about the occupation of dental hygienists the most. The middle and high school students required the information about the required entrance examination and employment in this growing field of study, and it was noted that the university students and dental hygienists wanted to know more information regarding statistics of available employment of dental hygienists (such the job options that would be available as upon graduation from their certificate program, etc.). The information orders that the questioners wanted answered were determined and identified as follows: employment (39.3%), entrance examination (18.8%), working conditions (11.5%), tasks (11.3%), and curriculum (9.4%). When the information captured from the questions from the participants and questioners were assorted in detail, the detail information orders that the questioners wanted were as follows: information on applicable places of study, such as the available university (13.0%), annual salary (11.5%), prospects (10.3%). overseas employment (9.3%), and public dental hygienists (8.7%).

2017-12-31T15:00:00Z Sung-hyeon Choi Na-kyung Yoon Ji-hyun Jang Young-hoon Kim Hoon-sang Chang Yun-chan Hwang In-nam Hwang Won-mann Oh Bin-na Lee https://oak.chosun.ac.kr/handle/2020.oak/19035 2024-04-30T02:03:01Z 2017-12-31T15:00:00Z

Title: Endodontic treatment of tooth with morphological anomalies using cone-beam computed tomography Author(s): Sung-hyeon Choi; Na-kyung Yoon; Ji-hyun Jang; Young-hoon Kim; Hoon-sang Chang; Yun-chan Hwang; In-nam Hwang; Won-mann Oh; Bin-na Lee Abstract: The aim of this study is to describe the endodontic treatment of a radix entomolaris (RE) with the C-shaped canal in mandibular first molar and a fused maxillary premolar with two supernumerary teeth with the separated root canal using cone-beam computed tomography imaging (CBCT). In our cases, non-surgical endodontic treatment based on the results of CBCT diagnosis, ProTaper rotary system, hand instrumentation, and passive ultrasonic irrigation along with periodontal treatment resulted in long-term and successful prognosis. Therefore, CBCT analysis an effective diagnostic tool for the treatment of teeth containing complex root canals.

2017-12-31T15:00:00Z Keon-il Yang Ah-young Cho Jin-young Yang Hong-in Shin Won-pyo Lee Byung-ock Kim Sang-joun Yu https://oak.chosun.ac.kr/handle/2020.oak/19032 2024-04-30T02:03:00Z 2017-12-31T15:00:00Z

Title: Effect of autogenous tooth bone graft with membrane on Class II furcation defects in dogs : A histologic and histomorphometric study Author(s): Keon-il Yang; Ah-young Cho; Jin-young Yang; Hong-in Shin; Won-pyo Lee; Byung-ock Kim; Sang-joun Yu Abstract: The study evaluated the efficacy of combining autogenous tooth bone grafts with membranes in surgically created class II furcation defects. Thirty teeth of 10 dogs were assessed. Furcation defects (5 × 4 × 3 mm3) were created in the lower third and fourth premolars. Defects in the control, experimental-1, and experimental-2 groups were treated with non-resorbable membranes only, autogenous tooth bone grafts with non-resorbable membranes, and autogenous tooth bone grafts with resorbable membranes, respectively. Healing patterns were observed 4 to 8 weeks after treatment. Mesio-distal sections were obtained and stained with hematoxylin and eosin, and histological and histomorphometrical analyses were performed. Four weeks after treatment, connective tissue and autogenous tooth bone graft materials with newly formed bone were observed. Partial recovery of periodontal ligament-like tissue and formation of cementum-like tissue at root surfaces also occurred. Eight weeks after treatment, mature bone tissue formation was noted. In addition, regular thickness of cementum-like tissue at root surfaces, and improved periodontal ligament-like tissue were observed. Areas of newly formed tissue were 92.2% ± 13.0%, 97.4% ± 4.4%, and 98.1% ± 2.8% at 4 weeks after treatment, and 96.7% ± 3.7%, 96.8% ± 5.7%, and 99.6% ± 0.8% by 8 weeks post-treatment, in the control, experimental-1, and experimental-2 groups, respectively. Regeneration of defective tissues occurred in the experimental group compared with the control group, but not significantly. This study showed that combining autogenous tooth bone grafts with membranes in class II furcation defects improves healing efficiency.

2017-12-31T15:00:00Z Ah-reum Lee Hyun-soo Kim Hee-won Ku Ho-keel Hwang Hyoung-hoon Jo Jeong-bum Min https://oak.chosun.ac.kr/handle/2020.oak/19030 2024-04-30T02:03:00Z 2017-12-31T15:00:00Z

Title: Evaluation of etched enamel using quantitative light-induced fluorescence Author(s): Ah-reum Lee; Hyun-soo Kim; Hee-won Ku; Ho-keel Hwang; Hyoung-hoon Jo; Jeong-bum Min Abstract: The purpose of this study is to evaluate the effect of etching on the ground and unground enamel using quantitative light-induced fluorescence (QLF). Thirty extracted incisors were used in the study. One-half of the labial surface of each tooth was ground with #400- grit SiC paper. The other half was left intact. Ground and intact surfaces were coated with nail varnish leaving rectangular windows of enamel uncoated. A 32% phosphoric acid gel was applied for 15, 30, 60 seconds. The mineral loss in terms of percentage of fluorescence (delta F) was assessed by QLF at baseline and after etching. Effect of etching time and mechanical pretreatment were analyzed with independent t-test and one-way ANOVA. Grinding the enamel before etching for 15 seconds and 30 seconds had a significant effect on demineralization. However, no significant difference in demineralization was observed between the ground and unground enamel with 60 seconds of etching. The ΔF values decreased with increased etching time. But there was no significant difference in the ΔF values between 15 seconds and 30 seconds, and 30 seconds and 60 seconds in both ground and unground enamel. Demineralization after acidetching can be quantified using QLF. The result indicated that the degree of demineralization increases with etching time and mechanical pretreatment.

2017-12-31T15:00:00Z