• Restorative Dentistry and Endodontics
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• 제37권4호
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• pp.240-244
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• 2012

Crown reattachment is the most conservative treatment which can be used to restore fractured tooth, presumably with sufficient strength, while maintaining original contour, incisal translucency, and reducing chair time and cost. However, in case of crown fracture with pin-point pulp exposure, we should cautiously minimize the irritation to the pulp and consider pre-treatment pulpal status, choice of pulp capping materials, choice of bonding system and treatment sequence during crown reattachment procedures. This case reports the considerations while crown reattachment with direct pulp capping using calcium hydroxide (Dycal, Dentsply Caulk).

• The Journal of Advanced Prosthodontics
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• 제4권3호
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• pp.170-173
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• 2012

Correct occlusal relationships are part of the successful prosthetic treatment for edentulous patients. Fabrication of complete dentures comprises of clinical and laboratory procedures that should be executed accurately for achieving success with fabricated dentures. Errors occurring during the clinical and laboratory procedures of a denture may subsequently lead to the occlusal errors in the final prosthesis. These occlusal errors can be corrected in two ways: i) in patient's mouth ii) by recording new centric relation and remounting dentures on an articulator. The latter method is more feasible because the mobility of denture base on the mucosa in oral cavity does not permit the identification of premature contacts in centric occlusion and tooth guided eccentric excursions. This article describes a modest and effective clinical chair-side remount procedure using customized mounting platforms.

• 대한치과기공학회지
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• 제40권1호
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• pp.27-32
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• 2018

Purpose: This study was performed to investigate processability of the dental zirconia block. Most of the CAD/CAM zirconia restorations utilize the partially sintered blocks, which are sintered at a temperature lower than $1100^{\circ}C$. Methods: Partially sintered zirconia samples were prepared $40{\times}30{\times}10mm$ and surface treatment by #2000 sandpaper. Scratch hardness was determined by the procedure of ASTM G171-03 using a scratch hardness tester(KS TECH, Korea) equipped with a real time load detector to measure tangential force during scratching. The scratch rate was 30 mm/min. Results: Scratch hardness(Hs) increases steeply with increase in the loads. The highest Hs was sampl 1.42 GPa and lowest was sample 0.42 GPa. Conclusion : The machinability of partially sintered CAD/CAM zirconia blocks can be optivized by manipulation of Hs.

• The Journal of Advanced Prosthodontics
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• 제2권2호
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• pp.46-49
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• 2010

BACKGROUND. Though implant dentistry is very successful and predictable in treatment of patients with destroyed dentition, there are some cases with limitations to implant therapy. In these cases, alternative treatment modality should be considered. CASE DESCRIPTION. A patient with destroyed dentition was rehabilitated with a lateral rotational path removable partial denture. According to the diagnosis, we determined to raise vertical dimension for esthetic and functional restoration. The final restoration was performed after four months of provisional period. CLINICAL IMPLICATION. The edentulous patients with compromised esthetics and functions can be successfully treated with a rotational path removable partial denture through adequate treatment planning and precise laboratory procedure.

• 대한치과기공학회지
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• 제4권1호
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• pp.5-7
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• 1982

This study was performed to examine the effect of repeated firing on porcelain color stability. Sixty sepcimens of generally uniform size and shape(9.7 12mm)were prepared using the manufactorer's specifications and among them 50 specimens that showed no defect after firing procedure were selected. All samples, abraded with sandpaper disc, ultrasonically cleaned, and air fired to amedium glaze were devided into 10 groups according to the number of repeated firing and, upon completion, mounted on a 13 by 16cm board. 30 persons(five dentists, ten dental techanicians, and fiftheen students) were asked to compare the samples for variations, in hue, chroma and value under natural and artificial light. The results were as follows:(1) There were no color change detected in the first four firings.(2) Slight color change were noticed in subsequent firings(ie: greater decreases in value with slight increases In chroam)(3) However, the hue remained constant in all 10 groups after repeated firings.

• 대한치과의사협회지
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• 제57권7호
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• pp.392-402
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• 2019

The most important part of everyday root canal treatment is diagnosis about the morphology of tooth, root and root canal. Usually this procedure is performed by visual examination and radiographic (panoramic/periapical) examination. However, 2-dimentional radiography has several limitations such as imposition of anatomic structures including buccal/lingual root canals and distortion of images. Recently, owing to the increased interest in dental implant and affordable cost of CBCT equipment, CBCT has been introduced widely in local dental clinics. CBCT is characterized by their lower radiation dose and shorter exposure time than conventional CT scan, and ability of 3-dimentional reconstruction of the dento-alveolar structure. Also in endodontic field, the data from CBCT could be very helpful in diagnosing complex root canal anatomy, apical periodontitis, cause of failure and in determining treatment plan. However, there are some limitations such as radiation dose and artifact. Therefore, clinicians should know about indication, advantages and limitations of CBCT, and properly use it for successful root canal treatment to save the natural teeth.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제46권5호
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• pp.361-366
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• 2020

Guided bone regeneration (GBR) is a surgical procedure that utilizes bone grafts with barrier membranes to reconstruct small defects around dental implants. This procedure is commonly deployed on dehiscence or fenestration defects ≥2 mm, and mixing with autogenous bone is recommended on larger defects. Tension-free primary closure is a critical factor to prevent wound dehiscence, which is critical cause of GBR failure. A barrier membrane should be rigidly fixed without mobility. If the barrier is exposed, closed monitoring should be utilized to prevent secondary infection.

• 한국치위생학회지
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• 제16권6호
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• pp.993-1007
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• 2016

Objectives: The purpose of the study was to review the current status of clinical practice and training in dental hygiene in hospitals and clinics for the students. Methods: A self-reported questionnaire was completed by 80 dental hospitals and clinics from August 8 to September 12, 2016. Except incomplete answers, 211 copies were retrieved and analyzed. The questionnaire consisted of general characteristics of the subjects (6 items), present condition of clinical education (7 items), support policy and facilities (8 items), teaching personnel (6 items), improvement direction (3 items), and general considerations (3 items). Results: The annual practice time for students was 8.4 weeks. The average number of students per each practice institution was 5.95. The evaluation of the clinical practice period was rated as 'average' by 55.3% of the respondents, while 65.4% preferred the current duration of the practice. Meanwhile, 33.0% of the respondents wanted to increase the practice period. In clinical training education support, 62.3% of the hospitals had a person in charge, 79.2% of the hospitals and clinics had a operative procedure, appointed staff and a department for student practice. But 86.5% of the hospitals did not have standards for the budget for practice and instruction fee. In the personnel for clinical training, 52.6% said they were dental hygienists. In 87.1%, the practice instruction conducted by professors was done through communication with the hospital or clinic, while the man-to-man practice instruction was 8.6%. Conclusions: It is necessary to improve the process and operation method of dental hygiene clinical training. In order to make clinical training meet education goals, a standardized set of criteria is needed to support training education and guidelines for instructors and students.

• 한국치위생학회지
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• 제18권5호
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• pp.741-750
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• 2018

Objectives: This study aimed to investigate factors affecting treatment satisfaction of patients with dental implants and quality of life. Methods: A questionnaire survey was conducted for adults who underwent dental implant treatment. at dental departments of general hospitals or dental clinics in Seoul and Gyeonggi-do. Data was analyzed to get descriptive statistics of variables, and was under independent t-test, one way ANOVA, and multiple regression analysis. Results: The mean of total satisfaction with implants was $3.73{\pm}0.41$ in the 5-point scale, and that of general satisfaction was $3.97{\pm}0.53$, followed by mean values of psychological satisfaction of $3.68{\pm}0.51$, aesthetic satisfaction of $3.67{\pm}0.49$, and masticatory function of $3.65{\pm}0.53$. Factors that affect implant treatment satisfaction among patients were monthly income (more than 4 million won), hesitation of the procedure (treatment period), regular checkup (yes) and concerns during treatment (work). Factors that affect the quality of life of patients who underwent implant treatments were satisfaction of aesthetic function and overall satisfaction. Conclusions: The above results showed that the higher the aesthetic satisfaction and overall satisfaction with the implant are, the higher the quality of life of patients get. Therefore, it is necessary for dental specialists to perform dental implants well to improve quality of life of patients.

• 대한치과의사협회지
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• 제57권8호
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• pp.437-447
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• 2019

Purpose: In recent years, efforts to improve the dental curriculum in South Korea have focused on a shift to outcome-based dental education based on core competencies in dentistry. So far, the field has seen various studies on the development of competencies, performance evaluation, and the importance of outcome-based education, but few studies have documented the development of such an education model. Therefore, this study develops an OBE curriculum for dentistry education and describes the development procedures and then finally this study intends to share our experience to other dental schools. Methods: This study introduces the development procedure and details of an outcome-based education model for dental education and presents the five stages of an outcome-based education model. In this study, 3 educational experts and 2 dental professor composed the TFT and developed the research method according to the ADDIE model. Step 1 is to conduct quantitative / qualitative research analysis through some survey and interview, Step 2 is to do a survey to revise competency, Step 3 is to develop a materials through consensus and participation of our professors of the dental school, Step 4 is to do some workshops, Step 5 is to prepare and conduct a outcome evaluation. Results: Step 1 is a required process for developing an educational model: the Job Analysis & Need Analysis stage. Step 2 is the Development of Outcome and Competency stage, which involves revising the competencies that are the basis of the curriculum. Step 3 is developing competency descriptions, competency levels, and evaluation criteria?the Development of Outcomes and Evaluation Standards. Step 4 is the Development of Milestones for Curriculum and Instructional Strategy, which examines the curriculum's problems and analyzes the improvements of each course. Step 5 is the Evaluating Outcomes stage, conducted based on the competencies specified by the target dental school. Conclustion: The model presented here can serve as a foundation for outcome-based education in other dental schools.