• The Journal of the Korean dental association
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• v.54 no.6
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• pp.414-428
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• 2016

Objectives: The aim of this study was to assess the morphologic characteristics of two types of stainless steel crowns (SSCs) for the first primary molar using a 3D scanner. Study design: Two types of SSCs, KIDS CROWN (KC) and 3M ESPE ND-96 (ND), for the first primary molars were scanned using a 3D scanner. The mesiodistal and buccolingual diameters at the height of the contour and the cervical margin, occlusocervical diameters on the mesial, distal, buccal, and lingual aspects were measured, and the crown shape ratio, the smooth surface crown height ratio, and the cervical convergence were calculated. Results: In the crown shape ratio of the mandibular SSC, KC was larger buccolingually compared with ND. In the smooth surface crown height ratio, ND was larger than KC in all of the maxilla and mesial, distal, and lingual aspects of the mandible. ND was more convergent to the cervical mesiodistally and buccolingually compared with KC. Conclusion: In the superimposed images of the maxillary SSC, the mesiolingual and distolingual line angles of KC were more prominent compared with ND. In the mandible, ND demonstrated higher cusps and more obvious buccal developmental lobes than KC. ND showed a larger cervical undercut than KC.

• Restorative Dentistry and Endodontics
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• v.46 no.2
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• pp.17.1-17.9
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• 2021

Objectives: In recent in vitro study, it was reported that osteostatin (OST) has an odontogenic effect and synergistic effect with mineral trioxide aggregate (MTA) in human dental pulp cells. Therefore, the aim of this study was to evaluate whether OST has a synergistic effect with MTA on hard tissue formation in vivo. Materials and Methods: Thirty-two maxillary molars of Spraque-Dawley rats were used in this study. An occlusal cavity was prepared and the exposed pulps were randomly divided into 3 groups: group 1 (control; ProRoot MTA), group 2 (OST 100 μM + ProRoot MTA), group 3 (OST 10 mM + ProRoot MTA). Exposed pulps were capped with each material and cavities were restored with resin modified glass ionomer. The animals were sacrificed after 4 weeks. All harvested teeth were scanned with micro-computed tomography (CT). The samples were prepared and hard tissue formation was evaluated histologically. For immunohistochemical analysis, the specimens were sectioned and incubated with primary antibodies against dentin sialoprotein (DSP). Results: In the micro-CT analysis, it is revealed that OST with ProRoot MTA groups showed more mineralized bridge than the control (p < 0.05). In the H&E staining, it is showed that more quantity of the mineralized dentin bridge was formed in the OST with ProRoot MTA group compared to the control (p < 0.05). In all groups, DSP was expressed in newly formed reparative dentin area. Conclusions: OST can be a supplementary pulp capping material when used with MTA to make synergistic effect in hard tissue formation.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.33 no.3
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• pp.256-259
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• 2007

Abscesses are common in the oral and maxillofacial area. However, secondary thrombosis of the internal jugular vein accompanying the primary abscess is rare. In 1936, Andre Lemeierre studied 20 patients who showed an initial oropharyngeal infection, septicemia, internal jugular vein thrombosis, and secondary spread of the infection, and after then this condition Lemierre syndrome. Clinically, these patients present with tonsilitis lasting several days, continuous fever, and cervical pain. In the past, ligation and excision of the internal jugular vein was often performed. Current therapeutic modality for this condition is appropriate antibiotic prescription and surgical drainage of abscess. This case report presents a patient who showed symptoms of Lemierre syndrome, initiated as an oropharyngeal infection then developed thrombosis of the internal jugular vein. This patient was admitted into Seoul National University Dental Hospital. In addition to routine antibiotic therapy, surgical incision and drainage of the infection site was performed. Without ligation or excision, the thrombosed IJV disappeared eventually. As the Lemierre syndrome is not a common disease, this case report and review of the literature would be useful regarding a treatment of patients with Lemierre syndrome.

• Journal of Korean society of Dental Hygiene
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• v.21 no.6
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• pp.793-803
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• 2021

Objectives: The purpose of this study was to investigate the current status of dental hygiene curricula related to clinical practice in Korea. Methods: Clinical work included the categories 'history taking, infection control, oral prophylaxis, preventive treatment, education/counseling, radiography/reading, assisting/cooperation, impression/bite registration, anesthesia, etc.', and 66 works were finally selected based on the frequent tasks of dental hygienists. The subjects were made to answer nine questionnaires. Results: It was found that the theory and practice of the main works operated quite differently in lectures and practice in each school. All types of practice were applied to all schools in the case of 'scaling'. The evaluation of clinical practice was also found to be very different from school to school. Conclusions: For dental hygienists to establish expertise in clinical practice and promote quality improvement, it is necessary to develop a core curriculum focusing on clinical practice. The standardized curriculum should be improved to an efficient and competency-centered one defining clearly the role of dental hygienists considering the needs and importance of clinical practice.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.9 no.2
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• pp.85-90
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• 2013

The aim of this research is to compare the attitude toward the special needs of dental staffs between the special dental clinic (SDC) and the general dental clinic (GDC). Surveys were done on 21 dental staffs (7 dentists and 14 dental hygienists) of SDC and 47 dental staffs (10 dentists and 37 dental hygienists) of GDC. Attitudes were rated on a questionnaire with the five-point Likert scale. Mann-Whitney test was utilized for statistical analysis. In SDC, more female dentists and dental staffs who have relatives with disability were working. Dental staffs of SDC showed that the more experience they had, the more positive attitudes toward the communication with the patients with special needs (p<0.05). Dental staffs of SDC represented more active attitudes toward the oral health promotion, treatment, research and volunteering (p<0.05). In conclusion, dental staffs who have personal motivation were working in SDC and the experience of dental treatment to the patients with special needs influenced the dental staffs' attitudes toward them. In future, a research about the attitude toward the disabled with more exact scale should be followed.

• Journal of Dental Anesthesia and Pain Medicine
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• v.18 no.5
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• pp.305-308
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• 2018

An 87-year-old woman was referred for the extraction of residual teeth and removal of tori prior to prosthetic treatment. After surgery under general anesthesia, the surgical tape was removed to detach the bispectral index sensor and the hair cover. After the surgical tape was removed, skin injury occurred on the left side of her face. After epidermis repositioning and ointment application, a dressing was placed over the injury. Her wound was found to have healed completely on follow-up examination. Medical adhesive related skin injury (MARSI) is a complication that can occur after surgery and subjects at the extremes of age with fragile skin are at a higher risk for such injuries. Careful assessment of the risk factors associated with MARSI is an absolute necessity.

• Journal of Periodontal and Implant Science
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• v.51 no.6
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• pp.433-443
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• 2021

Purpose: This study aimed to evaluate the effectiveness of the partial split-flap technique with a K-incision on vertical guided bone regeneration (vGBR) and to retrospectively analyze the clinical and radiographic outcomes of dental implantation using this approach. Methods: In total, 78 patients who received 104 dental implants with vGBR, categorized as (1) pre-GBR and post-implantation and (2) simultaneous GBR and implantation, were enrolled. Data analysis was based on periapical radiographs, clinical photos, and dental records. The 2-sample t-test was used to compare the 2 surgical procedures. Results: The baseline vertical bone level, augmented bone height (ABH), and treatment duration were significantly higher in the pre-GBR procedure group. The survival rates of the implants were 96.1% and 94.8% in implant- and patient-based analyses, respectively. In Cox regression analysis, high rates of implant failure were found in the presence of ABH of ≥4 mm, smoking, and diabetes. Conclusions: Within the limitations of this retrospective study, the partial split-flap technique using a K-incision for vGBR showed stable clinical outcomes and favorable dental implant survival.

• Imaging Science in Dentistry
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• v.50 no.3
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• pp.193-198
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• 2020

Purpose: This study investigated knowledge, attitudes, and perceptions regarding the future of artificial intelligence (AI) for radiological diagnosis among dental specialists in central India. Materials and Methods: An online survey was conducted consisting of 15 closed-ended questions using Google Forms and circulated among dental professionals in central India. The survey consisted of questions regarding participants' recognition of and attitudes toward AI, their opinions on directions of AI development, and their perceptions regarding the future of AI in oral radiology. Results: Of the 250 participating dentists, 68% were already familiar with the concept of AI, 69% agreed that they expect to use AI for making dental diagnoses, 51% agreed that the major function of AI would be the interpretation of complicated radiographic scans, and 63% agreed that AI would have a future in India. Conclusion: This study concluded that dental specialists were well aware of the concept of AI, that AI programs could be used as an adjunctive tool by dentists to increasing their diagnostic precision when interpreting radiographs, and that AI has a promising role in radiological diagnosis.

• The Journal of Advanced Prosthodontics
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• v.7 no.2
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• pp.129-137
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• 2015

PURPOSE. Squamous cell carcinoma (SCC) of the tongue has a relatively high incidence of all oral cancers. Some studies have reported a relationship between intraoral dental prosthesis and SCC of the tongue; however, this relationship remains controversial. The purpose of this study was to investigate the relationship between SCC of the tongue and the positional aspects of dental prosthesis using a retrospective analysis. MATERIALS AND METHODS. A total of 439 patients with SCC of the tongue were diagnosed and treated in the Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital. Patients were treated over a 12.5-year period ranging from January 1, 2001 to June 30, 2013. Statistical analysis was performed to examine potential differences between the groups. RESULTS. The number of patients with a crown and/or a bridge (134, 63.5%) was significantly different than the number of patients without a prosthesis (77, 36.5%). Even after accounting for different types of prostheses such as crowns, bridges, and dentures, no significant differences were observed between the position of the prosthesis and the location of the SCC of the tongue, with significance defined as a P-value less than .05 by the Pearson-Chi square test. CONCLUSION. Patients with crowns and/or bridges exhibited more frequent SCC of the tongue compared with patients without these prosthesis. These data support the hypothesis that mechanical trauma and galvanic phenomena play a role in the etiology of SCC of the tongue.

• Journal of Korean society of Dental Hygiene
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• v.12 no.2
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• pp.419-430
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• 2012

Objectives : This review suggests prospect of educational institutions through research on the establishment trend of Korean dental hygiene programs by comparison with health science programs, analysis based on location and year. Methods : For the research, 78 dental hygiene programs, 11 dental colleges, 144 nursing programs, 41 medicine programs, 38 radiology programs, 49 optometry programs, 39 biomedical laboratory science programs, 65 physical therapy programs, 48 occupational therapy programs were analyzed using SPSS 12.0v. The result is as follows. Results : Establishment trend of dentistry-related programs and dental hygiene programs is twice as high as nursing programs and medicine-related programs. Number of 3-years dental hygiene programs is twice as high as 4-years dental hygiene programs. Entrance quota of 3-years dental hygiene programs is four time higher than 4-years programs. On regional basis, number of dental hygiene programs is the highest in Gyeonggi-do by 9 while it is the lowest in Incheon-si and Jeju-do by 1. Number of students in dental hygiene programs is the highest in Gyeonggi-do by 2,514. Establishment of dental hygiene programs showed the biggest increasing trend in Gyeonggi-do and Jeju-do from 1995 to 1999; and in Gangwon-do, Chungcheongbuk-do, Chungcheongnam-do, Gyeongsangbuk-do, Gyeongsangnam-do, Jeollabuk-do, Jeollanam-do from 2005 to 2010. Conclusions : Assurance of legal rights in the workplace and improvement of educational environment should take prudence over establishment of dental hygiene programs in order to develop professionalism among students in dental hygiene.