• The Journal of Korea Assosiation for Disability and Oral Health
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• v.14 no.1
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• pp.7-10
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• 2018

Special care dentistry, also known as special needs dentistry, is concerned with the oral health of people who have intellectual disability, or who are affected by other medical, physical, or psychiatric issues. Dental schools must educate dental students for the competency in managing and treating individuals with special health care needs. The purpose of this study is to identify the current status of special care dentistry education in Korean dental schools. A questionnaire relating to the education of special care dentistry was sent to eleven dental schools in Korea via email. The result turned out that eight out of eleven schools had classroom teaching of special care dentistry, while only four had practical teaching programs. Nine schools had dental clinics for the disabled, in which two of them had special care clinics within the Pediatric dentistry clinic, and other seven in separate clinical sites. Despite the increased interest in special care dentistry, education including classroom teaching and practical teaching was still insufficient and needed more development. This study implicated a small but valuable understanding of special needs dentistry education in Korea.

• Journal of Aquaculture
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• v.3 no.1
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• pp.39-48
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• 1990

The growth response of the yellow perch, a highly proteinaceous food feeder in nature, to different protein levels (50, 40 and $27\%$) in formulated diets was determined over a 20-week period. Approximately $23\%$ of dietary protein could be spared by substituting less expensive carbohydrate and lipid materials without any noticeable ill-effects or reduction in weight gains. In turn, there was no statistically significant difference between total weight gains of fish fed at three different levels of protein diets, although fish on the 50 and $40\%$ protein diets grew better in the first few weeks. A shift in the protein requirements occur-red after about 10 weeks of rearing. Growth efficiencies(growth/food intake) became nearly the same at all levels of protein and decreased consistently throughout the remainder of the study period. The results indicate that young yellow perch(6g initial weight) can grow normally with the $27\%$ protein diet after about 10 weeks of initial feeding with higher protein diets(or regular commercial diets).

• Journal of Korean society of Dental Hygiene
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• v.14 no.2
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• pp.241-250
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• 2014

Objectives : The purpose of the study was to examine the ethical requirements for the protection of human subjects in the publication guidelines of dental health journals. Methods : The guidelines of 27 dental health journals were reviewed to determine ethical standards alone, with Helsinki Declaration, by an institutional review board (IRB), informed consent, protection of subject privacy and confidentiality, and no conflicts of interest. Results : 1. Dentistry journals listed on National Research Foundation of Korea had a conflict of interest disclosure provisions of the contribution(76.9%) and the IRB approval(61.5%). 2. Half of the dental health journals were not listed on National Research Foundation of Korea Society but they agreed the advance posting provisions. 3. Dental hygiene journals provide 100% of ethics alone and receive 75% of IRB in the papers. 4. Dental health and dental hygiene journals have conflicts of interest disclosure regulations(59.2%) and IRB approval(51.8%). 5. There existed statistically significant differences between the dental health journals whether they were listed on the human subjects and ethical standards for protection in National Research Foundation of Korea or not. Conclusions : While the publication guidelines of dental health journals have followed to a greater extent in recent years, there is still a need for further instructions to ensure that the authors satisfy all ethical requirements in conducting research on human subjects. IRB approval for dental journals must be standardized and reinforced reflecting the characteristics of each journals. The researchers should obey the code of ethics suitable for education and the editors must review the paper continuously.

• Journal of the korean academy of Pediatric Dentistry
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• v.26 no.4
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• pp.630-635
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• 1999

Transposition has been described as an interchange of position of permanent tooth and is a relatively rare dental anomaly. Transposition of teeth may occur both in the maxillary and mandibular arches. but it appears more often in the maxilla of individual teeth, the maxillary canine is the most often involved. A canine transposes most often with a first premolar and less frequently transposes with a lateral incisor. Incomplete transposition is a condition describing an interchange in the position of the crowns of two permanent teeth, while the root apices remain in their relative position. Complete transposition is a situation in which both the crowns and entire root structure are transposed. The etiologic factors of transposition are tooth buds interchange, retained deciduous canines, migration of the erupting canine, trauma to deciduous teeth etc. This report describes a case of a transposition between a maxillary left canine and a lateral incisor and impaction of a maxillary left central incisor due to trauma to deciduous dentition.

• Journal of the korean academy of Pediatric Dentistry
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• v.38 no.4
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• pp.435-440
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• 2011

Maxillary canine impaction is a common eruption problem in children. Impaction frequently involves further complications such as root resorption of adjacent teeth, cyst formation and migration of the neighboring teeth, etc. Various treatment modalities include extraction of preceding deciduous canine, orthodontic traction, and surgical extraction followed by immediate replantation of the extracted tooth at the proper position(autotransplantation). Autotransplantation is considered as the treatment of choice when surgical exposure and subsequent orthodontic traction are difficult or impossible due to unfavorable impacted position. The prognosis of autotransplantation is affected by the degree of apex formation, surgical procedures performed, timing of root canal treatment, and length of stabilization period. In these two cases presented, the patients with unerupted maxillary canine were treated with autotransplantation. One case was thought that guidance of eruption by orthodontic traction was difficult because of its unfavorable impacted position. In the other case, parents didn't agree to treat by orthodontic traction, therefore autotransplantation was done. In both cases, autotransplantation was carried out following root canal treatment and orthodontic treatment, and both cases have demonstrated to be successful to this day.

• Journal of the korean academy of Pediatric Dentistry
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• v.39 no.1
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• pp.73-78
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• 2012

Complex odontomas consist of a conglomerate mass of enamel, dentin and cementum which bears no anatomic resemblance to a tooth. The majority of these lesions are completely asymptomatic, being discovered on routine radiographic examination or when films are taken to determine the reason for tooth eruption failure. Compound odontomas seldom cause bony expansion, but complex odontomas often cause slight or even marked bony expansion. Complex odontomas are mostly associated with permanent teeth and very rarely associated with deciduous teeth. They are usually located in the first-or second-molar areas of the mandible. This report presents a case of a patient with impaction of a maxillary primary canine by a complex odontoma in which surgical excision of the lesion was performed. And the primary canine was repositioned right under gingival level for spontaneous erution. Follow-up after six months showed spontaneous eruption ofthe repositioned maxillary primarycanine.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.4
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• pp.715-721
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• 2003

Dental injuries with crown fracture occur frequently, especially in young patient Reattachment of the crown fragment has been shown to yield good esthetic results in that original tooth anatomy is restored with a material that abrades at a rate indntical to that of the adjacent tooth substance and at the same time permits continual monitoring of pulpal status through the fragment. Case 1 was complicated crown fracture with pin-point bleed ing, that was treated by direct pulp capping with calcium hydroxide and fragment reattachment. Case 2 was in trusive luxation with complicated crown fracture and was treated by pulp treatment and fragment reattachment. Case 3 was uncomplicated crown fracture, and fracture line involved slightly biologic width and treated by reattachment of the crown fragment.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.4
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• pp.605-610
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• 2003

Physiologic root resorption occur from the apex of the primary teeth close to the permanent teeth towards the apex. Pathologic root resorption occur on surfaces of root due to causes such as trauma, replantation, orthodontic treatment, delayed or irregular eruption of teeth, or growing cysts or tumors. In children, the most frequently affected teeth from trauma are the maxillary primary central incisors. After such an event, root resorption initiate from the traumatized pulp or periodontium. In this case report, periapical radiographs were used to evaluate the features of pathologic root resorption by studying patients with history of trauma. The following results were noted. 1. Pathologic root resorption was observed in various patterns in all of the 10 traumatized maxillary primary central incisors. 2. Though teeth with pathologic root resorption were treated with pulpectomy, the resorption process continued to progress.

• The Journal of the Korean dental association
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• v.55 no.3
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• pp.215-228
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• 2017

The topic of academic integrity is an important public concern that has emerged in higher education. Recent surveys at U.S. and Canadian dental schools revealed that cheating and plagiarism were significant problems in dental schools. In addition, some schools stated that cheating had increased compared to a decade ago. Various institutional rituals have been implemented to enhance the academic integrity environment of U. S. and Canadian dental schools. Furthermore, the application of honor code which is dealing with ethical issues has been reported to improve the attitudes and behaviors of students. Since there have been no reported studies regarding ethics curricula in Korean dental schools, further studies should be needed to assess academic integrity policies, violations, and the results of the measures in Korean dental schools. Additionally, the challenge to provide professional ethics curricula for dental students must be conducted with respect and humanity for our students and thus, students will be more likely to respond positively to expectations in terms of ethical behaviors. Therefore, the outcome is clearly and undoubtedly link to better care for patients.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.29 no.4
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• pp.309-315
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• 2016

Recently, finite element analysis technique has been widely used for structural and mechanical understandings of human body in the dentistry field. This research proposed an effective finite element modeling method based on CT images, and parametric studies were performed for the occlusal simulation. The analyses were performed considering linear material behaviors and nonlinear geometrical effect, and validated with the experimental results. In addition, the skull models with two different molar relations such as Class I and full-CUSP Class II were generated and the analyses were performed using the proposed analytical method. As results, the relationships between the mandibular movement and occlusal force of both two models showed similar tendency in human occlusal force. However, stress was evenly distributed from teeth to facial bone in the skull model with Class I, while stress concentration was appeared in the model with full-CUSP Class II due to the changes of occlusal surfaces of the model.