• The Journal of the Korean dental association
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• v.51 no.2
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• pp.92-98
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• 2013

Osteoarthritis is one of the most common degenerative disease in the temporomandibular joints(TMJ). Structural changes in the osseous structure is associated with destructive changes such as erosion, flattening and other bony changes. Destructive degenerative changes quite often cause shortening of the condyles which eventually produces the changes in the occulsion and the facial profile which require orthorgnathic surgery and/or orthodontic treatment by the dental professional. The dentists need to understand the nature and the pathophysiology of the osteoarthritis in the TMJ for the better dental treatment, especially in orthodontic and prosthodontic treatment. The possibility of serious complication can not be avoided after any dental treatment is given to the patient if osteoarthritic changes in the TMJ is under progression as undiscovered.

• Journal of Korean society of Dental Hygiene
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• v.18 no.2
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• pp.177-189
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• 2018

Objectives: To provide necessary information for stable establishment of the national dental scaling reimbursement system. Methods: This study was conducted in 380 adults in their twenties or older for about one month from July 2017. The questionnaires were composed of general characteristics, recognition (awareness) of dental scaling, knowledge of the dental scaling reimbursement program, changes in perception before versus after introduction of the dental scaling reimbursement program, and interest in oral health. To investigate into any factors affecting changes of interest in oral health care after introduction of the dental scaling reimbursement program, a multiple regression analysis was performed. Results: The investigation into any factors affecting changes of interest in oral health care after introduction of the dental scaling reimbursement program showed that higher usual interest in oral health (p<0.001) and the consideration that the dental scaling charges have been affordable after introduction of the scaling reimbursement program (p<0.01) led to more changes in interest in oral health care. Conclusions: The above-mentioned results suggest that the dental scaling reimbursement program has brought favorable changes in the perception of dental scaling. It is expected that the said program will contribute significantly to the improved national oral health, and the Government should make constant efforts to develop it as a long-term policy for oral health improvement.

• The korean journal of orthodontics
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• v.46 no.6
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• pp.372-378
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• 2016

Objective: The purpose of the present study was to evaluate the postoperative three-dimensional (3D) changes in the proximal segments after mandibular setback sagittal split ramus osteotomy and to compare the changes between the conventional mini-plate fixation and semi-rigid sliding plate fixation. Methods: Cone-beam computed tomography (CBCT) images were used to evaluate the postoperative 3D changes in the proximal segments during the healing process. CBCT images were superimposed using the symphysis and the lower anterior mandible as references. Results: There were no statistically significant differences between the conventional mini-plate and semi-rigid sliding plate groups (p > 0.05). With respect to the distribution of changes greater than 2 mm in the landmarks, the right condylion, right coronoid process, and left condylion showed ratios of 55.6%, 50.0%, and 44.4%, respectively, in the semi-rigid sliding plate group; however, none of the landmarks showed ratios greater than 30% in the conventional mini-plate group. Conclusions: There were no statistically significant differences in postoperative changes in the segments between the conventional mini-plate and semi-rigid sliding plate groups. Nevertheless, while selecting the type of fixation technique, clinicians should consider that landmarks with greater than 2 mm changes were higher in the semi-rigid sliding plate group than in the conventional mini-plate group.

• Journal of Korean Academy of Dental Administration
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• v.8 no.1
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• pp.37-40
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• 2020

The background of this study is the observation that there is an increase in the number of elderly persons and the decrease in fertility rates, which may be related to the increase in the average age of the Korean people; accordingly, the national health insurance system changes every year following this pattern. However, this study investigates whether these changes are reflected in the dental hygiene curriculum. Data from the national health insurance system is reviewed for the last three years, and the recently published dental hygiene curriculum is selected, compared, and analyzed using a literature survey. The study is divided into two parts: information that is reflected in the dental hygiene curriculum and information that is not reflected in the dental hygiene curriculum, but which it is believed should be included. In addition, as the part reflected in the dental hygiene curriculum, it was stated in three subjects of dental implantology, dental prosthesis, and conservative dentistry, and there were four cases. Therefore, efforts should be made to ensure that the curriculum for dental hygiene students should reflect the changes in the national health insurance system so that students can more easily understand dental insurance claim processes.

• The korean journal of orthodontics
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• v.45 no.2
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• pp.59-65
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• 2015

Objective: To investigate skeletal and dental changes after application of a mandibular setback surgery-first orthodontic treatment approach in cases of skeletal Class III malocclusion. Methods: A retrospective study of 34 patients (23 men, 11 women; mean age, $26.2{\pm}6.6years$) with skeletal Class III deformities, who underwent surgery-first orthodontic treatment, was conducted. Skeletal landmarks in the maxilla and mandible at three time points, pre-treatment (T0), immediate-postoperative (T1), and post-treatment (T2), were analyzed using cone-beam computed tomography (CBCT)-generated half-cephalograms. Results: The significant T0 to T1 mandibular changes occurred $-9.24{\pm}3.97mm$ horizontally. From T1 to T2, the mandible tended to move forward $1.22{\pm}2.02mm$, while the condylar position (Cd to Po-perpendicular plane) shifted backward, and the coronoid process (Cp to FH plane) moved vertically. Between T1 and T2, the vertical dimension changed significantly (p < 0.05). Changes in the vertical dimension were significantly correlated to T1 to T2 changes in the Cd to Po-perpendicular plane (r = -0.671, p = 0.034), and in the Cp to FH plane (r = 0.733, p = 0.016), as well as to T0 to T1 changes in the Cp to Po-perpendicular plane (r = 0.758, p = 0.011). Conclusions: Greater alterations in the vertical dimension caused larger post-treatment (T2) stage skeletal changes. Studying the mandibular position in relation to the post-surgical vertical dimension emphasized the integral importance of vertical dimension control and proximal segment management to the success of surgery-first orthodontic treatment.

• Journal of dental hygiene science
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• v.17 no.3
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• pp.226-232
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• 2017

This study aims to determine the changes in health beliefs and practices of dental hygienists on infection control after having received special training on that subject. The study population consisted of dental hygienists working at the dental institutions located in Seoul and Gyeonggi areas. The intervention group and the control group each had randomly assigned 26 dental hygienists. The intervention group received training courses on infection control once a week for 3 hours, for a total of 4 training sessions. We used a survey tool to find the changes between the two groups regarding their health beliefs and practices on infection control measures. The survey was conducted prior to the training sessions, 3 months and 2 weeks after the training. The study results revealed statistically significant increases in perceived sensitivity, perceived seriousness, and perceived benefits after the training courses in the intervention group (p<0.05). A statistically significant decrease in perceived barriers was also noted in the intervention group (p<0.05). Additionally, there was a statistically significant increase in the practice of infection control in the intervention group as compared to the control group (p<0.05). Therefore, we conclude that infection control training is crucial in bringing about positive changes to the health beliefs of dental hygienists, and a structured system is necessary for continuous infection management along with training in order to improve infection control practices.

• Journal of Korean society of Dental Hygiene
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• v.7 no.3
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• pp.301-316
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• 2007

With these changes in the environment of dental service, dental hygienists are suggested to change their roles to cope with the changes. Hygienists are putting forth many efforts to promote smooth and efficient dental treatments, and as a practical measure. As a part to cope with such changes. Korea Dental Hygienists Association(KDHA) has prepared the system of Specialized Dental Hygienist and put the system into enforcement through an affiliated organization, Korean Academy of Dental Hygiene. The purpose of this study is to investigate the specialized nurse system in our country's medical environment and the specialized dental hygienist systems in other countries as similar cases comparable to the specialized dental hygienist system in our country and present basic data for the establishment of specialized dental hygienist system. For this study, a survey of dental specialists, such as dentists, dental hygienists and nurses, and patients, has been conducted qualitatively through person-to-person depth interview. The interview questions were related to the need for a specialized dental hygienist system, educational programs, functions and roles, and issues that must be solved for establishment of the system. Based on the interview results, the following conclusions were derived. The specialized dental hygienist system must encourage dental hygienists to possess advanced abilities in clinical practices, present systematic and developmental directions in educational programs, and stimulate specialized dental hygienists to actively work as manager and supervisor, medical health service providers, educators, and researchers. Lastly, for issues that must be solved for the establishment of the system, the duties and jobs of specialized dental hygienists must be defined more concretely, which must be acknowledged by people working in related occupations, citizens and the government. Furthermore, we need to examine the scope of duties of dental hygienists and enact laws and systems to protect the scope. These roles will lead dental hygienists to lay the foundation that allow them to make enthusiastic activities as an oral hygienist and clinician as well as show the way how to act as an educator, a researcher, a manager and an administrator.

• The Journal of the Korean dental association
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• v.11 no.10
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• pp.643-647
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• 1973

The auther has made the oral examination of 523 pregnant women-such as calculus, gingival disease, periodontal disease, and dental caries-who visit the dental department and obstetric department in National Medical Center in Seoul. After the above studies, results of the changes of the pregnant women's oral condition are following. 1. In creasing of calculus deposition due to the changes of saliva components. 2. Increasing of incidence of gingival and periodontal and pathological changes followed by calculus deposition. 3. Incidence of new cavities are not related to the pregnancy, but old cavities have become more progressive in dental caries.

• The Journal of the Korean dental association
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• v.57 no.5
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• pp.270-278
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• 2019

Oral appliances therapy is becoming increasingly recognized as a successful treatment for snoring and obstructive sleep apnea(OSA). Compared with continuous positive airway pressure(CPAP), the gold standard therapy for OSA, oral appliance therapy are less efficacious for severe OSA but are more acceptable and tolerable for patients, which in turn, may lead to a comparable level of therapeutic effectiveness. Nevertheless, the various side effects of oral appliance therapy, such as, increased salivation or dryness, pain or discomfort in the teeth or gums, occlusal discomfort in the morning, temporomandibular disorders, dental and occlusal changes may cause discontinuation of treatment or changes in treatment plan. Therefore, oral appliance therapy should be provided by a qualified dentist who can evaluate oral tissues, occlusion, and temporomandibular joints, and prevent and manage the possible side effects.

• Journal of Korean society of Dental Hygiene
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• v.12 no.1
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• pp.113-122
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• 2012

Objectives : This study was carried out to investigate the caries resistant effect of fluoride by dental polishing prior to fluoride application in vitro. Methods : Artificial caries lesion was made on the surface of specimen enamel taken from cow's permanent cuspid on the part of labial surface after resin embedding and polishing. Artificial dental plaque was formed on the 72 dental specimen 25~45 VHN(Vickers Hardness Number) which were divided into three groups(fluoride varnish, APF gel, control) with dental polishing and without polishing respectively. Fluoride varnish and APF gel group with 20 second polishing or without polishing were immersed in the artificial saliva respectively. Control group with or without polishing were immersed in the artificial saliva. Results : 1. Significant difference was not found by fluoride varnish between polishing group and non polishing group (p>0.01). 1) polishing group. The changes of Vickers Hardness Number(VHN) were $14.49{\pm}13.73$. 2) non-polishing group. The changes of VHN were $11.67{\pm}5.39$. 2. Significant difference was not found by APF gel between polishing group and non polishing group (p>0.01). 1) polishing group. The changes of VHN were $8.48{\pm}8.37$. 2) non-polishing group. The changes of VHN were $5.32{\pm}2.59$. Conclusions : Showed no significant difference between polishing group and non-polishing group regardless of fluoride materials (fluoride varnish, APF gel).