• Journal of Korean society of Dental Hygiene
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• v.8 no.4
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• pp.127-139
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• 2008

The purpose of this study was to examine the awareness of people in general about halitosis. The subjects in this study were 184 people who visited the clinical practice lab at J health college to get their teeth scaled. After a survey was conducted from May 1 to June 3, 2008, the analyzable answer sheets from 178 respondents were analyzed after four different areas were selected, which included smoking/nonsmoking, scaling experience, toothbrushing frequency and the use of oral hygiene supplies. SPSSWIN 12.0 program was utilized to make a frequency analysis and crosstabs analysis. The findings of the study were as follows: 1. Concerning subjective feelings of halitosis, 55.3 percent(99 people) of the respondents found themselves to have a moderate level of bad breath. 28.5 percent(51) deemed themselves to have a little foul breath, and 14 percent(25) didn't feel they had any bad breath. 2. As to the subjective level of halitosis, 89.8 percent(168) thought that their bad breath was a little perceived only by themselves, regardless of smoking, scaling experience, toothbrushing frequency and the use of oral hygiene supplies. 3. In regard to the cause of halitosis, 31 percent(56) cited plaque in the mouth as the cause, and 28.5 percent(51) pointed out the other causes that weren't mentioned in the questionnaire. 18.4 percent(33) cited decayed tooth, and 11.2 percent(20) pointed out gastroenteric disorder. 10.6 percent(19) viewed diabetes as the cause. 4. As to the time when they had the subjective symptom of halitosis, 114 respondents(63.7%) felt their own bad breath the most immediately after they got up 21.8 percent(39 respondents) did it when they were hungry 5.5 percent(9) did that before breakfast, and 4.5 percent(8) did that after having breakfast. 5. Regarding view of how to prevent halitosis, 52.5 percent(94) brushed their teeth frequently 21.2 percent(38) got their teeth scaled on a regular basis at a dentist's office, and 17.9 percent(32) drank water often. The above-mentioned finding seemed to suggest that the respondents weren't well aware of the fact halitosis was a sort of oral and systemic disease. Therefore the development of halitosis prevention and care programs geared toward practice lab visions were required.

• Journal of Korean society of Dental Hygiene
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• v.8 no.4
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• pp.205-217
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• 2008

The purpose of this study was to provide information on the development of an oral-health promotion program geared toward office workers. The subjects in this study were 240 employees at the headquarters of S construction company. After a survey was conducted in July and August 2008, the answer sheets from 208 respondents were gathered, and 191 answer sheets were analyzed except 17 unanalyzable ones. The findings of the study were as follows: 1. In regard to subjective oral health status, the largest number of the participants that accounted for 37.2% found their mouth to be neither healthy nor unhealthy. The greatest number of them that represented 58.1% had never visited a dentist's office to receive preventive treatment. 2. Regarding relationship between toothbrushing education experience and toothbrushing frequency, the most common toothbrushing frequency was three times a day( 46.5%) among the company employees who had ever received that education. In the event of the office workers without that experience, the most prevalent frequency was three times(63.6%). The toothbrushing frequency was statistically significantly different according to the toothbrushing education experience(p<0.05). As to the relationship of toothbrushing education experience to tooth- brushing method, the largest number(48.2%) of those who had ever received that education brushed their upper and lower teeth along with the gums by rotating the toothbrush downward from the top and upward from the bottom respectively. In the event of the office workers without that experience, 49.4 percent brushed their teeth and gums by rotating the toothbrush up and down. Thus, whether they had ever received education about toothbrushing made a statistically significant difference to their toothbrushing method(p<0.05). 3. As a result of evaluating their oral health belief by utilizing a five-point scale, they got a mean of 2.95. In each area of oral health belief, they got the best marks in benefit(3.66), salience(3.42), barrier(2.84), susceptility(2.58) and seriousness(2.23). Given the above-mentioned finding of the study, two sorts of oral health beliefs, which are benefit and salience, should be stressed in the development of oral health education programs that cater to company employees. And sustained research efforts should be channeled into finding out the relationship between oral health and actual oral health care.

• Journal of Korean society of Dental Hygiene
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• v.7 no.4
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• pp.481-493
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• 2007

It follows in increase of the old age population and the loss of teeth increases, also the supplement prosthetics treatment which is caused by loss of teeth is various and it develops and the dentistry implant demand is increasing. This study enforced a self-administered survey with 197 dental personnels employed in dental hospitals, dental clinics from August 15, 2007, to September 15, in the area of Daejeon. It's ultimately intended to serve as a basis for the preparation of more effective, appropriate dental implants education programs for personnels, who take a crucial part in dental implants operation, provide better dental services to patients who are in need of dental implants operation. As the result, the study got the following conclusion. 1. The population sociological feature of dental hospital and dental clinic showed that significant differences of dental service career. Dental service career of dental personnels shows; below 3 years 43.1%, 4~6 years 35.3%, more than 7 years 21.6% in dental hospitals, below 3 years 29.5%, 4~6 years 28.1%, more than 7 years 42.5% in dental clinics(p=0.027). 2. The average score of personnels knowledge in dental implants was 3.67point, from analyzing the knowledge on dental implants of dental personnels from dental health-care settings, dental personnels employed in dental hospitals scored relatively higher than in dental clinics(p=0.129). Dental personnels with 4~6 years of experience scored the highest(p=0.002). 3. The average score of dental personnels compliance in dental implants was 3.92point, from analyzing the compliance of dental implants of dental personnels from dental health-care settings, dental personnels employed in dental hospitals scored relatively higher than in dental clinics(p=0.006). Dental personnels with 4~6 years of experience scored the highest(p=0.707). 4. The contingency coefficient between dental implants general knowledge and the general compliance(r=0.233, p=0.001), operation knowledge and operation compliance(r=0.332, p=0.000), maintenance knowledge and maintenance compliance(r=0.236, p=0.001). 5. Recently dental implants is emerging as one of the important medical services in the dental treatment sector. From analyzing the compliance of dental implants of dental personnels in dental health-care settings, dental personnels employed in dental hospitals scored relatively higher than in dental clinics. Consequently, the effort of the dentist and the dental personnels demanded to be earnestly to improves the difference of the knowledge and compliance against the dental implants of the dental personnels in dental health-care settings, it is thought that with reinforcement of effective role share and professionalism to success of dental implants, more system and the specialty dental implants education which is standardized continuously must be provided to all dental personnels.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.26 no.1
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• pp.85-92
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• 2000

Common dental procedures(dental extraction & minor operation) are potentially stress-inducing in many patients, especially medically compromised patients. The body's response to dental stress involves the cardiovascular system(an increase in cardiovascular workload), the respiratory organ and the endocrine system(change in metabolism). To minimize the stress to the medical risk patient, the stress reduction protocol was established. The obtained contents were as follows: (1) Recognize the patient's degree of medical risk (2) Complete medical consultation before dental therapy (3) Schedule the patient's appointment in the morning (4) Monitor and record preoperative and postoperative vital signs (5) Use psychosedation during therapy (6) Use adequate pain control during therapy (7) Short length of appointment : do not exceed the patient's limits of tolerance (8) Follow up with postoperative pain/anxiety control (9) Telephone the higher medical risk patient later on the same day that treatment was given Though the stress reduction protocol above was applied to the dental extraction in medically compromised patients with the advanced infected teeth, the final responsibility for the complications(syncope, bleeding & infection, etc.) in a patient rests with the dentist who ultimately treats him. For the prevention of postextraction complications & poor prognosis, the authors treated the advanced infected teeth with the pulp extirpation, opening drainage through the canal and complete occlusal reduction. The final extraction and wound closure were then done after $1{\sim}2$ weeks. The final prognosis was comfortable without common complications.

• Journal of the korean academy of Pediatric Dentistry
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• v.37 no.3
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• pp.368-373
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• 2010

The incisors function as instruments for biting and cutting food during mastication. They also support the lips and face and maintain vertical dimension. In addition, they contribute to overall normal arch appearance. They play important role during the articulation of speech and assist in guiding jaw closure. Extraction and space maintenance are the most common treatment for a tooth with poor prognosis. However, in the mixed dentition, extraction of the upper permanent incisors results in many complications, such as resorption of alveolar bone, poor esthetics, pronunciation, and mastication. Considering these various roles of incisors in oral cavity, approach for traumatized incisors, even the ones with poor prognosis, should be considered first prior to simple extraction. The dentist must take into account the age of the patient, growth potential, occlusion, oral hygiene status, economic status and motivation towards dental health in addition to patient compliance. In this case, although the prognosis was predicted to be unfavorable due to short root and mobility, we could save the central incisor using conservative treatment, reposition by orthodontic appliance instead of extraction.

• Imaging Science in Dentistry
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• v.46 no.2
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• pp.103-108
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• 2016

Purpose: The current study investigates the feasibility of a platform for a nationwide dose monitoring system for dental radiography. The essential elements for an unerring system are also assessed. Materials and Methods: An intraoral radiographic machine with 14 X-ray generators and five sensors, 45 panoramic radiographic machines, and 23 cone-beam computed tomography (CBCT) models used in Korean dental clinics were surveyed to investigate the type of dose report. A main server for storing the dose data from each radiographic machine was prepared. The dose report transfer pathways from the radiographic machine to the main sever were constructed. An effective dose calculation method was created based on the machine specifications and the exposure parameters of three intraoral radiographic machines, five panoramic radiographic machines, and four CBCTs. A viewing system was developed for both dentists and patients to view the calculated effective dose. Each procedure and the main server were integrated into one system. Results: The dose data from each type of radiographic machine was successfully transferred to the main server and converted into an effective dose. The effective dose stored in the main server is automatically connected to a viewing program for dentist and patient access. Conclusion: A patient radiation dose monitoring system is feasible for dental clinics. Future research in cooperation with clinicians, industry, and radiologists is needed to ensure format convertibility for an efficient dose monitoring system to monitor unexpected radiation dose.

• The Journal of Korean Academy of Prosthodontics
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• v.39 no.5
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• pp.492-501
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• 2001

The use of alginate impression materials today is prevalent because of its efficiency and simplicity in clinical settings. Unfortunately, the simplicity of the procedure tends to lull the dentist into a sense of well-being, and lead him into using careless or sloppy technique. Alginate impression materials are used to fabricate diagnostic and preliminary casts, and the final cast. Incorrect use of this material is known to affect the accuracy of the final prosthesis. The purpose of this study was to compare the effect of different mixing methods of alginate impression material and tray adhesive on the accuracy of the stone cast produced by each method. A total of 30 stone casts were produced by using 3 different types of mixing methods (10 stone cast for each mixing method, respectively). The first method utilized an automatic-mixing machine to mix alginate while the second method was carried out manually, strictly following manufacturer's instructions. The third method also involved manual mixing, but did not follow the manufacturer's instructions and was done in a random fashion. Also, 20 additional stone casts were produced by using alginate with or without tray adhesives were included in the study to evaluate effects of tray adhesives on the accuracy of alginate impression. 10 stone casts were produced by adding tray adhesives to the interior surface of the impression tray prior to taking the impression. The other 10 excluded this step. A total of 50 stone casts were analyzed by the three-dimensional measuring machine to measure and compare the dimensional changes of the impression material of each group. The results are as follows. 1. No significant difference was found between the automatic mixing group and the manually-mixing group(p>0.05). 2. For the group that followed manufacturer's instructions, less dimensional changes were record ed than the group that didn't in measuring distanced 4(p<0.05). 3. The group that used tray adhesives showed less dimensional changes(p<0.05). The findings revealed that mechanical methods of mixing alginate impression materials had little influence on dimensional changes. However, it is proven that following manufacturers instructions in alginate impression taking is an important step in acquiring accurate impressions and tray adhesives may play an important role in enhancing the results.

• Journal of the korean academy of Pediatric Dentistry
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• v.33 no.2
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• pp.173-180
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• 2006

Knowledge of growth and development is essential for pediatric dentistry treating growing patients. The data from the pediatric growth curve being used today does not reflect the growth transition of modern times, nor does it match the age range required for dental purposes. The present study, therefore, aims to introduce the process of producing a growth curve and growth rate curve based on data which represents a more accurate description of the present situation. The original data used in this study were from the 5th nationwide survey, SIZE KOREA 2004 study carried out by the Technology and Standards Policy Division, Department of Technology and Standards Planning, Ministry of Commerce, Industry. and Energy. Processing and rearranging the produced data with variations divided into the three quartiles and the 1st, 5th, 95th and 99th percentiles were included to produce a growth observation chart according to sex, height and weight differences. In the same way, a growth rate curve based on the geometric mean value was produced. The resulting growth charts can be used as an index for growth and development, and used for better communication between the pediatric dentist, patients or their parents.

• The korean journal of orthodontics
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• v.34 no.5 s.106
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• pp.448-457
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• 2004

As computer Programs for cephalometric analysis were developed in diagnosis & treatment planning, digital imaging of film-based cephalograms came to be needed. When a digital camera is used, a problem encountered the image distortion produced according to the focal length, which causes errors in indentifying landmarks. In addition, changes in the image size and compression ratio will inevitably produce a low quality image, causing errors in identifying landmarks. Hence. we have found the focal length producing the least image distortion when digital imaging the film-based cephalograms and the minimal digital camera setting which helps to identify the correct landmarks using the COOLPIX4500 digital camera (Nikon, Japan). The results were as follows The image distortion was minimized at a focal length of 16.4mm (79.4mm when converted into a 35mm film camera) when digital imaging the film-based cephalograms. When wide imaging, with a focal length of under IS.4mm, barrel distortion was found and when tole imaging. with a focal length of over 15.4mm pincushion distortion was found. The minimal digital camera setting was $2272{\times}1704$ pixel at normal (1/8) compression from which we can identify the correct landmarks at the same level as tracing the film-based cephalograms manually. As a result. when digital imaging the film-based cephalograms, using a COOLPIX4500 digital camera (Nikon, Japan), the focal length should be 16.4mm the pixel image size over $2272{\times}1704$, and the compression ratio over normal (1/8).

• The Journal of Korean Academy of Prosthodontics
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• v.58 no.3
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• pp.228-238
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• 2020

In order to deliver fixed partial denture to a patient successfully, dentist must take into many considerations beforehand. Patient's occlusal pattern should be fully understood before delivering any type of prosthesis, whether it's canine guidance or group function occlusion. In order to do so, movement of mandible should be recorded precisely. Introduced by Meyers in 1933, functionally generated path technique (FGP) has been successfully used to record mandibular movement with various materials, such as wax, and utilize it in fabricating precise prosthesis. In the following cases, patients showed secondary caries or endodontic-periodontic lesion on maxillary molars. Root canal treatment and subgingival curettage were done for each patient. Since the long term prognosis of each tooth was questionable, lateral force should be minimized. In order to do so, FGP technique was used to record mandibular movements precisely. Instead of using conventional plaster impression, intra-oral scanning of wax tracing was done to fabricate prosthesis efficiently. After delivery of fixed partial denture, favorable outcome was obtained.