• Imaging Science in Dentistry
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• 제39권4호
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• pp.195-198
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• 2009

Purpose : To establish reference doses of periapical radiography in Chonnam Province, Korea. Materials and Methods : The target-skin distances were measured for dental patient's 1235 exposures including 345 mandibular molar areas. Each periapical radiation exposure was simulated with exactly the same patients exposure parameters and the simulated radiation doses were measured utilizing Mult-O-Meter (Unfors Instruments, Billadal, Sweden). The measurements were done in 44 dental clinics with 49 dental x-ray sets in Chonnam Province for one or two weeks at each dental clinic during year 2006. Results : The third quartile patient surface doses were 2.8 mGy for overall periapical exposures and 3.2 mGy for periapical mandibular molar exposures. Conclusion : The third quartile patient surface doses in Chonnam Province can be used as a guide to accepted clinical practice to reduce patient radiation exposure for the surveyed reference doses were below the recommended dental periapical radiography dose of 7 mGy by IAEA.

• Journal of Periodontal and Implant Science
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• 제49권6호
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• pp.382-396
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• 2019

Purpose: The purpose of this study was to elucidate the efficacy and safety of carbonate apatite (CO₃Ap) granules in 2-stage sinus floor augmentation through the radiographic and histomorphometric assessment of bone biopsy specimens. Methods: Two-stage sinus floor augmentation was performed on 13 patients with a total of 17 implants. Radiographic assessment using panoramic radiographs was performed immediately after augmentation and was also performed 2 additional times, at 7±2 months and 18±2 months post-augmentation, respectively. Bone biopsy specimens taken from planned implant placement sites underwent micro-computed tomography, after which histological sections were prepared. Results: Postoperative healing of the sinus floor augmentation was uneventful in all cases. The mean preoperative residual bone height was 3.5±1.3 mm, and this was increased to 13.3±1.7 mm by augmentation with the CO₃Ap granules. The mean height of the augmented site had decreased to 10.7±1.9 mm by 7±2 months after augmentation; however, implants with lengths in the range of 6.5 to 11.5 mm could still be placed. The mean height of the augmented site had decreased to 9.6±1.4 mm by 18±2 months post-augmentation. No implant failure or complications were observed. Few inflammatory cells or foreign body giant cells were observed in the bone biopsy specimens. Although there were individual differences in the amount of new bone detected, new bone was observed to be in direct contact with the CO₃Ap granules in all cases, without an intermediate layer of fibrous tissue. The amounts of bone and residual CO₃Ap were 33.8%±15.1% and 15.3%±11.9%, respectively. Conclusions: In this first demonstration, low-crystalline CO₃Ap granules showed excellent biocompatibility, and bone biopsy showed them to be replaced with bone in humans. CO₃Ap granules are a useful and safe bone substitute for two-stage sinus floor augmentation.

• Safety and Health at Work
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• 제2권4호
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• pp.348-354
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• 2011

Objectives: This cross-sectional study was performed in the Dental School of Prince of Songkla University to ascertain noise exposure of dentists, dental assistants, and laboratory technicians. A noise spectral analysis was taken to illustrate the spectra of dental devices. Methods: A noise evaluation was performed to measure the noise level at dental clinics and one dental laboratory from May to December 2010. Noise spectral data of dental devices were taken during dental practices at the dental services clinic and at the dental laboratory. A noise dosimeter was set following the Occupational Safety and Health Administration criteria and then attached to the subjects' collar to record personal noise dose exposure during working periods. Results: The peaks of the noise spectrum of dental instruments were at 1,000, 4,000, and 8,000 Hz which depended on the type of instrument. The differences in working areas and job positions had an influence on the level of noise exposure (p < 0.01). Noise measurement in the personal hearing zone found that the laboratory technicians were exposed to the highest impulsive noise levels (137.1 dBC). The dentists and dental assistants who worked at a pedodontic clinic had the highest percent noise dose (4.60 ${\pm}$ 3.59%). In the working areas, the 8-hour time-weighted average of noise levels ranged between 49.7-58.1 dBA while the noisiest working area was the dental laboratory. Conclusion: Dental personnel are exposed to noise intensities lower than occupational exposure limits. Therefore, these dental personnel may not experience a noise-induced hearing loss.

• 한국치위생학회지
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• 제11권1호
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• pp.137-148
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• 2011

Objectives : The objectives of this study were to investigate the infection control practices of practicing dental hygienists. Methods : This research was based on self-filling survey which 149 dental hygienists in dental clinic and dental hospital on October 2009. For the data analysis, an SPSS WIN 11.5 program was used and its signification level was 0.05. The following shows the results of this study. Results : 1. There was significant difference in there practice about sterilization and disinfection of dental instrument depending upon the respondent' career(p<0.05). 2. There was significant difference to were gloves and a apron according to type of service(p<0.05). 3. There was significant difference in the time to change the gown according to experience of education factors infection control(p<0.05). Conclusions : The majority of dental hygienists surveyed reported altering infection control practices and treatment techniques. While there has been an improvement in compliance with recommended infection control guidelines. Even though there is a need for continuing infection control education for dental hygienists.

• 대한치과의료관리학회지
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• 제8권1호
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• pp.24-29
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• 2020

With the advancement of information technology, the application of augmented reality (AR) in dentistry is an emerging research field of image-guided surgery and dental education. In addition, the digital approach to incorporating AR in dental practice management is considered to be feasible. A prototype is developed to apply AR to dental daily clinical practice in order to help dentists to access electronic dental records. This prototype delivers patients' information and related clinical data to dental clinicians directly without the need to search for the appropriate patients. Wearable AR devices are considered to be a convenient tool for practicing dentists because dental practitioners are not always able to use a computer during active clinical sessions, such as implant placement, root canal treatment, and patient-doctor communication. The use of AR to visualize passive transferred patient data would be valuable for practicing dentists.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제25권1호
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• pp.7-16
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• 2019

Purpose: Analysis on the spatial configuration characteristics of dental department in medical center through examining outpatient department of medical center is necessary for the development of architectural planning of the dental healthcare system in Korea. This study has been performed to provide data for the planning of hospital architecture. Methods: Literature review of dental healthcare system and investigation on current status of dental department in medical center have been conducted. The plan and spatial configuration of seven medical centers in Seoul area have been analyzed. Results: The result of this study can be summarized in four points. The first one is that the clinical dental spaces are classified by dental school's dental hospital, dental department in medical center, dental hospital, private dental clinic, and public dental healthcare center in Korea. The second one is that the dental department in medical center is a result from medical law regulation and it is specified and subdivided with dental specialist system. The third one is that the types of the dental department in medical center are divided into independent type or comprehensive type according to the relationship with main outpatient department. The fourth one is that the spatial configuration of dental department in medical center is planned with 5-7 specialized departments and they are allocated in the dental department. Implications: In addition to the spatial configuration of dental department in medical center, it is necessary to analyze the other factors like circulation, relationship with other facilities in medical center to develop the dental healthcare system.

• 대한치과의사협회지
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• 제53권10호
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• pp.688-695
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• 2015

Purpose: The institutionalized elderly have placed the most vulnerable state, and the report about the oral health status of the institutionalized elderly was scarce. The aims of the current study were to investigate the oral health status of institutionalized elderly. Materials and methods: The survey of the oral health status was carried out on 487 institutionalized elderly from 4 longterm care facilities of Seoul metropolitan city, Gyunggi province, and Gangwon province in Korea. Results: The prevalence of dental caries, root caries, and dental calculus of the institutionalized elderly was 19.2%, 15.3%, and 23.7%, respectively. The percentage of edentulism among the institutionalized elderly was 26.2%. Those who had poor oral hygiene and tongue coating were 43.9% and 90.5%, respectively. The percentages wearing complete and removable partial denture on maxilla were 12.8% and 3.3%, respectively. The percentages wearing complete and removable partial denture on mandible were 7.8% and 5.6%, respectively. The percentages of institutionalized elderly needing complete and removable partial denture on maxilla were 29.7% and 27.2%, respectively. The percentages of institutionalized elderly needing complete and removable partial denture on mandible were 24.5% and 30.9%, respectively. Conclusion: The oral health stuatus of institutionalized elderly was poor. For the oral health promotion of elderly in longterm care facilities, it is essential to educate nurses and caregivers about the importance of the oral health and oral hygiene method.

• 한국치위생학회지
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• 제12권3호
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• pp.439-451
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• 2012

Objectives : The goal of this study is to investigate how transformational leadership does affect empowerment, organizational commitment and service quality of dental clinics and hospitals and for their efficient human resources management in a rapidly changing business environment. Methods : For this, workers of a dental clinic and a hospital in Gyeongsangnam-do were selected and the survey was carried out during September 1 to 30 of 2011 and the total 203 questionnaires were analyzed. Results : The analysis of structural model shows that transformational leadership has no significant influence on empowerment but does affect organizational commitment and service quality. And the result also reveals that empowerment has significant effect on organizational commitment and service quality while organizational commitment influences service quality. Conclusion : For this, it is needed that the leader of organization promotes the spirit of his subordinates and helps them find their potential ability and achieve goals by developing various leadership skills to cope with rapidly changing environment of dental clinics and hospitals.

• Journal of Periodontal and Implant Science
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• 제47권4호
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• pp.194-210
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• 2017

Purpose: The aim of the present study was to evaluate the healing of post-extraction sockets following alveolar ridge preservation clinically, radiologically, and histologically. Methods: Overall, 7 extraction sockets in 7 patients were grafted with demineralised bovine bone mineral and covered with a porcine-derived non-crosslinked collagen matrix (CM). Soft tissue healing was clinically evaluated on the basis of a specific healing index. Horizontal and vertical ridge dimensional changes were assessed clinically and radiographically at baseline and 6 months after implant placement. For histological and histomorphometric analysis, bone biopsies were harvested from the augmented sites during implant surgery 6 months after the socket preservation procedure. Results: Clinically, healing proceeded uneventfully in all the sockets. A trend towards reduced horizontal and vertical socket dimensions was observed from baseline to the final examination. The mean width and height of resorption were 1.21 mm (P=0.005) and 0.46 mm (P=0.004), respectively. Histologically, residual xenograft particles ($31.97%{\pm}3.52%$) were surrounded by either newly formed bone ($16.02%{\pm}7.06%$) or connective tissue ($50.67%{\pm}8.42%$) without fibrous encapsulation. The CM underwent a physiological substitution process in favour of well-vascularised collagen-rich connective tissue. Conclusions: Socket preservation using demineralised bovine bone mineral in combination with CM provided stable dimensional changes of the alveolar ridge associated with good reepithelialisation of the soft tissues during a 6-month healing period.

• 대한소아치과학회지
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• 제28권1호
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• pp.154-158
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• 2001

1997년부터 1999년까지 서울대학교병원 소아치과에서 시행한 37건의 전신마취를 작성된 의무기록을 바탕으로 전신마취의 선택이유, 치료전 전신상태, 연령분포, 치료내용, 합병증과 정기적인 내원여부 등에 대해 조사하여 다음과 같은 결론을 얻었다. 1. 전신마취의 선택이유중 대부분(97%)은 장애인이며, 치료전 전신상태는 ASA Class I 또는 Class II였다. 2. $11\sim15$세 환자들(41%)이 가장 많았다. 3. 전신마취 하에서 평균 8.1개의 수복치료와 3.3개의 발치를 시행하였다. 4. 시술후 합병증은 32%에서 발생하였으나, 대부분 경미하였다. 5. 6개월 이상 정기적인 내원을 한 경우는 12명 (32%)이었다.