• Restorative Dentistry and Endodontics
• /
• v.39 no.3
• /
• pp.180-186
• /
• 2014

Objectives: The purpose of this in vitro study was to evaluate the microleakage and penetration of fissure sealant in permanent molar teeth with fluorosis after pretreatment of the occlusal surface. Materials and Methods: A total of 120 third molars with mild dental fluorosis were randomly divided into 6 groups (n = 20). The tooth surfaces were sealed with an unfilled resin fissure sealant (FS) material. The experimental groups included: 1) phosphoric acid etching (AE) + FS (control); 2) AE + One-Step Plus (OS, Bisco) + FS; 3) bur + AE + FS; 4) bur + AE + OS + FS; 5) Er:YAG laser + AE + FS; and 6) Er:YAG laser + AE + OS + FS. After thermocycling, the teeth were immersed in 0.5% fuchsin and sectioned. Proportions of mircoleakage (PM) and unfilled area (PUA) were measured by digital microscope. Results: Overall, there were significant differences among all groups in the PM (p = 0.00). Group 3 showed the greatest PM, and was significantly different from groups 2 to 6 (p < 0.05). Group 6 showed the lowest PM. Pretreatment with Er:YAG with or without adhesive led to less PM than bur pretreatment. There were no significant differences among groups in PUA. Conclusions: Conventional acid etching provided a similar degree of occlusal seal in teeth with fluorosis compared to those pretreated with a bur or Er:YAG laser. Pretreatment of pits and fissures with Er:YAG in teeth with fluorosis may be an alternative method before fissure sealant application.

• The Journal of Korea Assosiation for Disability and Oral Health
• /
• v.11 no.2
• /
• pp.76-80
• /
• 2015

Mental retardation is one of the major disorders covered in special care dentistry. Patients show poor oral health and are a challenge for the dentist due to lack of cooperation. Triazolam is a short-acting benzodiazepine and has been used in the dental office for many years because of its favorable properties. In this study, five patients with mental retardation were sedated with triazolam on a dental out-patient setting. Patients were administrated with 0.25 mg or 0.5 mg of triazolam on the first dose according to the patient's cooperation. Twenty minutes after the initial dose, patients received 0.25 mg of triazolam. Triazolam was administrated sublingually to one patient and orally to four patients. Hydroxyzine was also administrated to three patients in order to prevent nausea and vomiting. All patients were inhaled with 50% nitrous oxide during the sedation. Treatment time ranged from 20 minutes to 55 minutes. Two patients showed paradoxical reactions and were administrated with intramuscular injections of flumazenil. In result, depending on the range of dental treatment and level of intellectual disability, we can assume that triazolam may be beneficial for sedation in disabled patients.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.44 no.4
• /
• pp.403-411
• /
• 2017

The purpose of this research is analyzing present condition, and pursuing developmental direction of consultation to department of dentistry for medical inpatient with dental trauma. This research conducted a retrospective analysis of consultation to department of dentistry for medical inpatient at Wonju Severance Christian Hospital from March 2011 to February 2017. This research analyzed chief complaint and dental diagnosis, referring department, time of consultation after dental trauma, relation between hospitalization period and time of consultation after dental trauma, relation between dental trauma and admission in the medical department due to trauma, cause and age of dental trauma occurrence, treatment of dental trauma, and revisiting rate of inpatient with dental trauma after discharge. Among all the chief complaint and dental diagnosis, dental trauma was the highest. Among all the referring departments, departments of surgery were the highest. In relation to being delayed of consultation term after dental trauma, it turned out that there's pretty high mutual relation between the hospitalization period and the consultation term after dental trauma, and the hospitalization period had the quantitative influence on the consultation term. Statistically, dental trauma and admission in the medical department due to trauma had significant relations. In case of those patients due to car accidents, they had dental trauma without exception. Statistically, patient's group with dental trauma in hospital room was younger than patient's group with dental trauma in non-hospital room. Statistically, dental trauma and treatment in hospitalization had no significant relations, and dental trauma and revisiting department of dentistry after discharge had no significant relations. For the child and adolescent inpatients hospitalized for car accidents, there is high possibility of accompanying dental trauma, and dental consultations can be delayed. For the young child inpatients, the possibility of dental trauma occurrence in hospital room is high. Moreover, treatments during hospitalization and revisiting department of pediatric dentistry after discharge are not performed well for inpatients with dental trauma. Regarding these results, it can be an alternative that improving of consultation system, dedicated workforce placement and having dental facilities and equipment in the hospital ward, education to medical doctor and dentist, communication between medical doctor and dentist. This research can be used as a study material of medical and dental departments, and it's expected to be committed to developing of consultations to department of dentistry for child and adolescent inpatients with dental trauma.

• The Journal of Korea Assosiation for Disability and Oral Health
• /
• v.13 no.1
• /
• pp.19-22
• /
• 2017

Moyamoya disease is characterized by progressive bilateral narrowing of the internal carotid arteries(ICA) and their main branches, and formation of a fine vascular network (moyamoya vessels) at the base of brain. Mild intellectual or motor impairment, or both can be seen in moyamoya disease patient. Patients having intellectual disability usually have malocclusions associated with oral habits such as tongue thrusting, bruxism, or clenching. A patient with moyamoya disease and cerebral palsy visited Chonbuk National University hospital for dental examination. She showed mild openbite on anterior teeth, and had oral habits such as mouth breathing, tongue thrusting, and drooling. She was treated with myofunctional therapy(MFT) whose purpose was to strengthen orofacial muscles. Lip closing force and bite force were recorded to evaluate the muscle tone. Tongue crib was delivered to restrict tongue thrusting habit, since her compliance to the MFT was decreased after 6 months of treatment. With the MFT and tongue crib, the openbite was fairly improved. When myofunctional therapy has difficulty in obtaining good compliances, the treatment should not be effective enough. Although intellectually disabled patients are not compliant enough, thus a habit breaking device should be needed to treat the openbite caused by oral habits, dentist should make an effort to do MFT, since it could reduce a treatment period, and enhance the stability.

• The Journal of Korea Assosiation for Disability and Oral Health
• /
• v.15 no.1
• /
• pp.84-88
• /
• 2019

Malocclusion occurs more frequently in Special Health Care Needed (SHCN) patients than those in general. As caregiver's needs for orthodontic treatment tend to increase, the dentist should know how to decide the extent of treatment. This case report is about orthodontic treatment for two SHCN patients; one patient with cerebral palsy, and another patient with autism. A 10-year-old patient with cerebral palsy showed protrusion and rotation of maxillary anterior teeth. To resolve his chief complaints and make better oral hygiene, he underwent orthodontic treatment using micro tube appliances for 6 months. Another 11-year-old patient with autism had anterior crossbite and showed space deficiency of #13 and chronic gingivitis because of poor oral hygiene. She underwent orthodontic treatment with maxillary skeletal expander, facemask and AP expansion appliance. After 18 months we found positive overjet and ended the treatment. When giving SHCNs orthodontic treatment, the extent of treatment can be chosen according to the patient's cooperative ability and the traits of disabilities. Before initiating orthodontic treatment, the caregivers should be aware of their limitations of the treatment. Since oral hygiene is crucial factor in every dental treatment, education of oral hygiene process for the caregivers and SHCN patient must be done before the orthodontic treatment.

• The Journal of Korea Assosiation for Disability and Oral Health
• /
• v.9 no.1
• /
• pp.56-65
• /
• 2013

I participated in Academic Exchange Program(Action plan II) between KADH(Korean Association for Disability and Oral Health) and JSDH(Japanses Society for Disability and Oral Health) for 2 months from 3rd July 2012 to 2nd september 2012 in the Department of Hygiene and Oral Health, School of Dentistry, Showa University at Tokyo, Japan. I have observed their operation process and learned what dysphagia is and how it is consulted and taken care of as a therapy for patients with eating and swallowing disorders for two months in The department of special needs dentistry at Showa University Dental Hospital, Jonan Branch of Tokyo Metropolitan Kita Medical Rehabilitation Center for the Disabled, Smile Nakano Center, Tokyo metropolitan center for persons with disabilities in Lidabashi for one week, Eating and swallowing functional therapy workshop for disabled children, Tokyo metropolitan Tobu medical center for Persons with Developmental/Multiple Disabilities located in Minamisunamitchi for one week and on The 17-18th JSDR(Japanese Society of Dysphagia rehabilitation) in Sapporo. Through Action Plan II program, I learned how precious eating, drinking and swallowing with ease are and observed how they do and what they do as a dentist or a dental hygienist in Japan for dysphagia patients. Therefore, I want to present the dental approaches of children with dysphagia in Japan, based on my experience for two months.

• Journal of The Korean Dental Society of Anesthesiology
• /
• v.12 no.3
• /
• pp.183-191
• /
• 2012

In most persons with disabilities had poor oral hygiene because of less attention and ability to perform a dental care. So the increased prevalence and severity of dental disease were common oral state. Although most persons with disabilities need a adequate dental treatment, it is often very difficult to treat because of noncooperativity and involuntary muscle movements. Dental treatments under sedation and general anesthesia were make to provide a high-quality dental service because of decreased anxiety and fear associated dental treatment in persons with disabilities. The dental professionals must be able to select and apply the proper sedation methods in agreement with the characteristics of the disabilities, general conditions, sedation experience and capacity of dentist, type and time of dental treatment, equipments of dental clinic, consent of patient's protector. The proshodontic treatment procedures, such as abutment preparation, dental impression taking process, try-in process of prosthesis and adjustment of occlusion, are difficult even for patients without disabilities. Those procedures are more difficult to patients with disability because it's too hard to control breathing and muscle. In this report, we performed prosthetic dentistry procedures to three patients with disabilities under dental sedation and general anesthesia.

• Journal of Korean Dental Science
• /
• v.10 no.1
• /
• pp.22-28
• /
• 2017

Purpose: The purpose of this study was to evaluate the dental fear experienced among Korean adolescents and to identify the relevant factors. Materials and Methods: In order to compare the level of dental fear depending on the subjects' previous experience, descriptive statistical analysis was performed. Gender- and grade-dependent evaluation was performed according to the presence of their previous dental visit and dental fear. Subjective oral health status was also investigated. In order to determine the factors affecting dental fear, logistic regression analysis was performed. Result: Among the total of 333 subjects who had experienced dental fear, females were found to experience 1.766 times greater dental fear than males (P=0.007). The worse subjective perception of their oral health was associated with increase in the experience of dental fear by 1.245-fold (P=0.047). Conclusion: The dental fear was likely to be formed during the visit to the dentist's office or through previous experience of dental treatment. Therefore in order to reduce the fear associated with dental treatment in adolescents, establishemnt of a proper environment in the dental clinic and a patient management program are necessitated.

• The Journal of the Korean dental association
• /
• v.51 no.8
• /
• pp.442-450
• /
• 2013

It is well known that the majority of dental injuries occur in children and adolescent. An injury to the teeth can have serious and long-term consequences, leading to their discoloration, malformation, or possible loss. The emotional impact of such an injury can be far reaching. The majority of dental injuries in the primary and permanent dentitions involve the anterior teeth, especially the maxillary central incisors. Concussion, subluxation, and luxation are the commonest injuries in the primary dentition, while uncomplicated crown fractures are commonest in the permanent dentition. If it is decided to preserve a traumatized primary tooth, it should be carefully observed for clinical and radiographic signs of pulpal or periodontal complications. Radiographs are also examined closely to disclose any damage to the permanent successor. The intervals between reexaminations should be individualized depending on the severity of trauma, the expected type of complications and the age of the patient. Most complications are observed within the first year of the trauma. However, the follow-up evaluation of permanent teeth should continue until treatment of all complications is completed, or until a lost or extracted permanent tooth has been adequately replaced. It is important that the dentist and the other members of the dental team are well prepared to meet the many complex and challenging problems in the care of dental emergencies.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.36 no.2
• /
• pp.245-252
• /
• 2009

The congenital missing of teeth is common, which takes place since the proliferation and differentiation are not allowed in that tooth bud fail to start development. The purpose of this study is to research incidence rate, number, and missing part of congenital missing teeth, and to study whether a person who has missing teeth has other abnormality of teeth or not. For this study, 1,520 subjects(aged 2.9$\sim$17) who had visited pediatric dentist department of Chonbuk national university dental hospital within 2 years were examined with an panoramic radiograph; exempting third molar missing state. The obtained results are as follows. 1. 8.88% among total subjects show missing teeth; male 9.05%, female 8.64% 2. The most frequently missing permanent teeth were the mandibular second premolars(22.3%). The most frequently missing primary teeth are mandibular lateral incisors(50%). 3. 43.3% patients have one permanent missing tooth, 34.3% have two, and 10.4% have more than six, respectively. In primary teeth, 86.7% patients have one missing tooth, and 13.3% have two missing teeth. 4. 18 patients(13.3%) have missing teeth as well as hyperdontia, while some patients have microdont, ectopic eruption, and fusion teeth.