• Journal of Technologic Dentistry
• /
• v.39 no.1
• /
• pp.55-65
• /
• 2017

Purpose: The study has been undertaken on several factors that may influence on the orthodontic treatment satisfaction with the subject of male and female university students who have experience in receiving the orthodontic treatment by visiting orthodontic clinic. Methods: This study has implemented questionnaire survey for 350 male and female university students who have experience in receiving the orthodontic treatment by visiting orthodontic clinic due to the mall occlusion, From the 350 questionnaires collected, a total of 291 copies (83.1%) excluding the questionnaires that have inconclusive response or erroneous response is used as the research analysis data Results: The orthodontic treatment satisfaction is significantly higher for students in large cities and mid- to small sized cities than students in rural area, and it was higher for students with mid-economic class that students of upper class and lower class. It is shown for a student that began the orthodontic treatment from the elementary school, a student that had 5 times or more of brushing teeth for each day had significantly higher level of satisfaction that students that are not. In addition, a student that knows well of the oral hygiene management method, a student that had the fluoride application treatment during the orthodontic treatment period and a student that used the toothbrush for orthodontic service had significantly higher level of satisfaction that students that are not. Conclusion: Factors influencing on the orthodontic treatment satisfaction are very diverse and it is considered that it requires effort to improve the quality of medical service and sufficient understanding on several factors to improve the orthodontic treatment satisfaction for patients as well as the encouragement for orthodontic treatment patients of the relevant people in orthodontic clinics that provide the orthodontic clinic service.

• The korean journal of orthodontics
• /
• v.14 no.2
• /
• pp.241-248
• /
• 1984

The mechanical properties of Cr-Ni alloy of austenitic stainless steel and Co-Cr alloy orthodontic wires were studied in tension. The wires (0.018 inch) were tested in the as-manufactured and heat-treated conditions. Instron type tension testing machine was used for this study. Mean values and standard deviations were computed. The results were as follows; 1. The Cr-Ni orthodontic wires of austenitic stainless steel are generally superior than the Co-Cr orthodontic wires in ultimate tensile strength, In the elongation, however, Co-Cr orthodontic wire are superior than Cr-Ni orthodontic wires. 2. Increase in the degree of strength by heat treatment are more clearly shown in Co-Cr orthodontic wires than Cr-Ni orthodontic wires. And the elongation is decreased by heat treatment in both case. 3. The changes of the degree of strength by cooling method we not clearly shown, but in Cr-Ni orthodontic wires, air cooling are more effective, in Co-Cr orthodontic wires, cooling effect are scarcely shown.

• Journal of Technologic Dentistry
• /
• v.42 no.2
• /
• pp.187-195
• /
• 2020

Purpose: The purpose of this study is to examine decision factors to start orthodontic treatment with male and female undergraduates having experience in orthodontic treatment at a dental clinic or hospital because of malocclusion. Methods: A survey was carried out to investigate decision factors to begin orthodontic treatment with 330 male and female undergraduates attending universities located in Daegu Metropolitan City or Gyeongsangbuk-do who had experience in orthodontic treatment at a dental clinic or hospital because of malocclusion, and out of 330 questionnaire sheets, total 294 (89.1%) sheets were employed for analysis after excluding ones unreliably or erroneously answered. Results: According to the results of analyzing decision factors for orthodontic treatment, such factors as 'a dentistry-related person's suggestion', 'feeling necessity on one's own' are found to be significantly higher in students majoring in health units than those having non-dental health majors, and students residing in small and medium cities are influenced more significantly by this decision factor, 'an acquaintance's suggestion', than those living in farming and fishing villages or big cities, and students who started orthodontic treatment at elementary school were more significantly influenced by the factor, 'feeling necessity through the public media'. Conclusion: Among the factors influencing their decision on orthodontic treatment, no influence was found in sexual difference, and each of the decision factors influenced them considerably according to the difference of their residence, economic power, majors, or time to start orthodontic treatment.

• Journal of Technologic Dentistry
• /
• v.46 no.3
• /
• pp.67-72
• /
• 2024

Purpose: In the dental field, acrylic resin can be used to produce various orthodontic appliances. The manufacturing of orthodontic resin requires the insertion of dental wires. However, currently, no study has compared the mechanical properties when dental wires are inserted into the orthodontic resin. Methods: In this study, specimens measuring 3.3 mm×10 mm×65 mm were produced by inserting 0.7- and 0.9-mm wires. A dental wire was used to create a specimen with the following configurations: single wire, two wires bonded together, and two wires spaced 5 mm apart. The flexural strength, flexural modulus, proportional limit, and work of fracture of the fabricated specimens were measured using a universal testing machine. Results: The dental resin inserted with wires demonstrated increased mechanical properties including bending strength, elastic modulus, yield strength, and fracture energy. The bending strength of the fabricated orthodontic resin specimens increased as the diameter of the wire expanded. Conclusion: Thus, the insertion of dental wires into dental resin increased the strength of the manufactured orthodontic appliance.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.24 no.3
• /
• pp.637-649
• /
• 1997

Early orthodontic treatment in growing children requires the removable orthodontic appliances. The removable orthodontic appliance can be used in the primary dentition and mixed dentition. The purposes of use of removable orthodontic appliance in prmary dentition or mixed dentition are the interception of skeletal or dental malocclusion, guiding the normal dentition, and retention after comprehensive orthodontic treatment. Therefore, it is needed to use the removable orthodontic appliance in children with malocclusion. This report presents cases of growing children with skeletal class II and III malocclusion treated with removable orthodontic appliance during mixed dentition and Multiloop Edgewise Arch Wire(MEAW) during permanent dentition. The results obtained through these cases were summarized as follows : 1. Removable orthodontic appliances guide normal dentition and skeletal growth in growing children. 2. Removable orthodontic appliances play an important role in intercepting malocclusion in mixed dentition before use of fixed orthodontic appliance. 3. MEAW can be applied to finishing stage of all cases and is effective in correction of occlusal plane, achievement of interdigitation, and control of dental inclination. 4. It is needed that removable appliances are used during mixed dentition through correct diagnosis and fixed appliance are used in permanent dentition.

• Journal of Korean society of Dental Hygiene
• /
• v.12 no.2
• /
• pp.251-260
• /
• 2012

Objectives : The purpose of this study was to examine the knowledge of people in general about orthodontic treatment and their attitude to that by conducting a survey in a bid to provide information on the improvement of their incorrect awareness of orthodontics and on the development of clinical orthodontic treatment. Methods and Results : The subjects in this study were 389 people in general who resided in Seoul and Gyeonggi Province. A self-administered survey was conducted, and the findings of the study were as follows: 1. As for awareness of orthodontic treatment among the people in general by gender, the women knew better about orthodontic treatment than the men, and the gender gap was significant(p<0.05). 2. Concerning satisfaction with the shape and arrangement of the teeth by age, those who were in their 20s were most satisfied, and the teens were satisfied the least. There were significant gaps according to age (p<0.05). 3. As a result of checking the degree of their inconvenience about the use of chewing teeth by age, the people who were in their 30s felt the most inconvenience, and the gap between them and the others was significant(p<0.01). 4. As a result of asking them whether they had an intention to receive orthodontic treatment, the women had a more intention to do that than the men(p<0.001). By age, the younger respondents had a more intention, and the gaps between them and the others were significant(p<0.001). 5. As a result of analyzing their perception of the positives of orthodontics by gender, the women took a more positive view of it than the men, and their gap was significant(p<0.01). Conclusions : When orthodontic treatment or orthodontic treatment counseling is provided to orthodontic treatment patients or people in general in the field of clinical dentistry, it should be noted that the way patients and people in general look at orthodontic treatment is different according to their age and gender, and they should be informed of the positives of orthodontic treatment to step up the development of orthodontic treatment.

• Journal of Korean society of Dental Hygiene
• /
• v.18 no.4
• /
• pp.535-546
• /
• 2018

Objectives: This study is to assess the correlation of the changes in dental health-related quality of life before, during, and after orthodontic treatments in the patients. Methods: The self-administered survey was conducted in the patients who completed orthodontic treatments living in Seoul and metropolitan areas using Oral Impact on Daily Performances (OIDP) to identify the relevant factors. Data were analyzed with descriptive statistics of variables, independent t-test, one way ANOVA, and multiple regression analysis. Results: From observations of OIDP before, during, and after orthodontic treatment, discomfort associated with three factors including physical, psychological and social ones showed the statistically significant increases during orthodontic treatment than before the treatment; whereas, it was dramatically dropped afterward. Multiple regression analysis to find the influential factors of satisfaction level on orthodontic treatment by setting before, during, and after OIDP as independent variables and satisfaction on orthodontic treatment as a dependent variable revealed that OIDP before orthodontic treatment and after orthodontic treatment significantly affected satisfaction on orthodontic treatment. Conclusions: The above analysis on the change in patients' dental health-related quality of life showed that the quality of life improved after the orthodontic treatment. Accordingly, patients' quality of life and satisfaction level on orthodontic treatment are expected to improve if they strive to maintain healthy dental health through orthodontic treatment.

• Journal of dental hygiene science
• /
• v.13 no.1
• /
• pp.105-114
• /
• 2013

The purpose of this study was to offer information to medical institution of specializing in orthodontic patients by surveying the influence of orthodontic patients' perception of treatment according to orthodontic treatment upon satisfaction and recommendation with orthodontic treatment, targeting patients with completion of orthodontics who have experience of having received orthodontic treatment. As a result of SAS ver. 9.1 analysis on what was surveyed from February 2010 to August, the following conclusions were obtained. In comparing perception of treatment on orthodontic treatment according to general characteristics, women compared to men were indicated to be higher (p<0.05) in inconvenience recognition (p<0.05) on orthodontic device and in inconvenience during orthodontic treatment (p<0.05). In perception of treatment on orthodontic treatment, the inconvenience of orthodontic device accounted for 79.3%, thereby having been recognized by the majority of subjects. Even the inconvenience during orthodontic treatment was being recognized by 69.8%. The orthodontic treatment expenses appeared enough to be expected by 61.6%. The frequency of visiting hospital during orthodontic treatment was indicated as saying of having been proper by 72.8%. The period of orthodontic treatment was indicated to be proper as well by 61.2%. Even understanding about treatment contents during orthodontic treatment was indicated to be understood by 62.6%. In the results of correlation among subjects' cooperation with dental treatment, satisfaction with treatment service, recommendation of this clinic, and satisfaction with the convenient facilities, the significantly positive correlation was shown (p<0.05) in all among items in each.

• Journal of Periodontal and Implant Science
• /
• v.46 no.3
• /
• pp.197-206
• /
• 2016

Purpose: The aim of this study was to evaluate alterations of papilla dimensions after orthodontic closure of the diastema between maxillary central incisors. Methods: Sixty patients who had a visible diastema between maxillary central incisors that had been closed by orthodontic approximation were selected for this study. Various papilla dimensions were assessed on clinical photographs and study models before the orthodontic treatment and at the follow-up examination after closure of the diastema. Influences of the variables assessed before orthodontic treatment on the alterations of papilla height (PH) and papilla base thickness (PBT) were evaluated by univariate regression analysis. To analyze potential influences of the 3-dimensional papilla dimensions before orthodontic treatment on the alterations of PH and PBT, a multiple regression model was formulated including the 3-dimensional papilla dimensions as predictor variables. Results: On average, PH decreased by 0.80 mm and PBT increased after orthodontic closure of the diastema (P<0.01). Univariate regression analysis revealed that the PH (P=0.002) and PBT (P=0.047) before orthodontic treatment influenced the alteration of PH. With respect to the alteration of PBT, the diastema width (P=0.045) and PBT (P=0.000) were found to be influential factors. PBT before the orthodontic treatment significantly influenced the alteration of PBT in the multiple regression model. Conclusions: PH decreased but PBT increased after orthodontic closure of the diastema. The papilla dimensions before orthodontic treatment influenced the alterations of PH and PBT after closure of the diastema. The PBT increased more when the diastema width before the orthodontic treatment was larger.

• The korean journal of orthodontics
• /
• v.51 no.1
• /
• pp.3-14
• /
• 2021

Objective: This study aimed to identify the perceptions of orthodontic treatment among Korean adults and determine the factors that drive them to seek orthodontic treatment. Methods: A total of 2,321 adults aged 19-64 years were surveyed using an internet research system from a specialized research company. The participants were divided into the following groups based on their experience of and willingness to undergo orthodontic treatment: experience, acceptance, and non-acceptance groups. The characteristics of the participants were compared using analysis of variance with post-hoc analysis. Multinomial logistic regression analysis was performed in all three models with the non-acceptance group as a reference. Results: In terms of demographic characteristics, age, gender, marital status, and education had significant influences on orthodontic treatment decisions in adults in the experience and acceptance groups (p < 0.001). When all the factors were analyzed, age, marital status, past dental treatment experience, regular oral examinations, demand for orthodontic treatment, optimal treatment period, health insurance coverage, information on orthodontic treatments, perceptions regarding orthodontic treatment, and psychosocial impact of dental esthetics significantly influenced orthodontic treatment decisions in adults in the experience and acceptance groups (p < 0.001). Conclusions: These findings suggest that various factors influence orthodontic treatment decisions in adults. Individuals who seek orthodontic treatment were found to undergo more regular dental treatment and oral examination than those who did not. They also had a better perception of orthodontic treatment and more negative values for the psychosocial impact of dental esthetics.