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2015, Vol.42, No.3

  • 1.

    Detection of Hidden Proximal Caries using Q-ray view in Primary Molars

    정연욱 | Lee Hyo-Seol | HYUNG JUN CHOI and 3other persons | 2015, 42(3) | pp.209~217 | number of Cited : 0
    Abstract PDF
    The purpose of this study was to evaluate the ability of Q-ray view (All-in-one Bio, Seoul, Korea) in detection of proximal caries in primary molars with sound marginal ridges. Thirty two children aged 3-9 years (average 5.6 ± 1.3 years old) were chosen, and two examiners evaluated 100 proximal surfaces of primary molars with sound marginal ridges. The teeth were examined with; (a) visual examination, (b) Q-ray view, (c) DIAGNOdent (KaVo, Biberach, Germany) and (d) digital periapical radiography. Kappa statistic was used to assess the agreement between each examination method and the degree of caries progression. The kappa values for enamel caries were 0.15 (visual examination), 0.10 (Q-ray view), 0.25 (DIAGNOdent) and 0.68 (digital periapical radiography). The kappa values for dentinal caries were 0.34 (visual examination), 0.56 (Q-ray view), 0.44 (DIAGNOdent) and 0.70 (digital periapical radiography). Although Q-ray view showed low diagnostic ability in detection of enamel caries, it was effective in detection of hidden proximal caries extended into dentin. Q-ray view would be a useful and simple device which could aid pediatric dentists in detection of hidden proximal caries in primary molars especially when examining uncooperative children or disabled persons.
  • 2.

    Diagnosis of Early Dental Caries with Dye-Enhancing Quantitative Light-Induced Fluorescence (QLF)

    김미희 | LEE, SANG-HO | LEE NAN YOUNG | 2015, 42(3) | pp.218~225 | number of Cited : 2
    Abstract PDF
    This study used sodium fluorescein to improve imaging diagnostic ability by increasing the fluorescence difference between sound enamel and caries lesions. It also made it easier to discriminate between stain and caries lesions using quantitative light-induced fluorescence (QLF). Half of the specimen surface was covered with nail varnish as a control. Specimens were divided randomly in six decalcification groups and decalcified for different lengths of time. Then, ΔF was measured using QLF-D. After applying 0.075% sodium fluorescein, we measured ΔF again and compared it with the initial value. After cutting the central portion of the specimen, we measured the lesion depth using scanning electron microscopy. The lesion surfaces observed with QLF were darker than normal enamel, whereas they were lighter than normal enamel after applying fluorescein. Longer decalcification time was associated with greater fluorescent dye penetration. The ΔF measured after applying fluorescein was higher than the initial value (p < 0.05). Due to QLF measurement using fluorescein being more sensitive for diagnosing early decalcification, this approach will enable early diagnosis of dental caries before the cavity formation stage, allowing the treatment of early caries lesions. With QLF and sodium fluorescein, we can easily discriminate between stain and caries lesions.
  • 3.

    Standard Clinical Procedure(Critical Pathway) on Dental Conscious Sedation for the Disabled Children

    김민수 | 배영은 | Jiyeon Kim and 4other persons | 2015, 42(3) | pp.226~232 | number of Cited : 1
    Abstract PDF
    Critical pathway (CP) defines the optimal care process, sequencing and timing of intervention by multidisciplinary health care teams for a particular diagnosis and procedure. The aim of the study was to evaluate the clinical usefulness and the satisfaction of patients and dental staff after implementation of a critical pathway for the dental treatment of disabled children and adolescents under conscious sedation. Thirty patients are divided in two groups (Pre-CP and CP) at the department of Pediatric Dentistry of Pusan National University Dental Hospital. The satisfaction levels of patients/guardians and the staff members were collected by survey questionnaire. The parents’satisfaction was significantly improved after the implementation of CP. Also, medical/dental staff members were highly satisfied with its usefulness. The application of a critical pathway for disabled children and adolescents might be useful and improve the satisfaction of the parents and medical/dental staff members.
  • 4.

    Bite Force and Lip Closing Force Measurement in Preschool Children

    조나영 | 김형운 | KIM JAE GON and 2other persons | 2015, 42(3) | pp.233~241 | number of Cited : 2
    Abstract PDF
    The aim of this study was to determine the bite force and lip closing force in preschool children and to analyze the correlation between these forces by age, height and weight, respectively. Data were obtained from 98 children (56 males, 42 females) ranging from 3 to 6 years of age. The magnitude of the bite force was measured bilaterally corresponding with the 2nd primary molars using a bite force gauge, GM10 (Nagano Keiki) and the force of lip closure was measured using LIP DE CUM (Cosmo Instruments). The averages of bite force for boys and girls were 217.69 N and 205.05 N, respectively. The relationship between bite force with age, height, and weight present significant positive correlation (p < 0.001, p < 0.001, and p < 0.001, respectively). The averages of lip closing force for boys and girls were 4.81 N and 4.07 N respectively. The relationship between lip closing force with age, height, and weight present significant positive correlation (p < 0.001, p < 0.001, and p < 0.001, respectively). No significant differences were observed between boys and girls (p > 0.05) in both forces. A significant correlation was observed between lip closing force and bite force (p = 0.002).
  • 5.

    Measurement of Maximum Mouth Opening in 2 to 6 year-old Korean Children

    최혜진 | 김추성 | 이대우 and 2other persons | 2015, 42(3) | pp.242~248 | number of Cited : 0
    Abstract PDF
    Maximum mouth opening is regarded as an important tool used to evaluate the clinical function of temporomandibular joint and the masticatory system. It has been reported that children can also exhibit severe dysfunction or pain in some cases of temporomandibular disorder. The purpose of this study was to measure the normal maximum mouth opening in Korean children and to analyze the correlations between mouth opening and the associated factors. Maximum mouth opening was measured from 151 healthy children between the ages of 2 and 6 years old. Age, height, weight, and mouth width were also recorded. As a result, the mean maximum mouth-opening was 37.72 ± 5.10 mm. While the values were greater in boys than in girls without statistical significance, the increases of maximum mouth opening based on age, height, weight, and mouth width were significant (p < 0.05). In children, positive correlation coefficients were observed between maximum mouth opening and the associated factors and height showed the highest correlation. In conclusion, we collected data of the normal range of maximum mouth opening in Korean children, and this study can be utilized as a basis in diagnosing pediatric temporomandibular disorder and safety standard of mouth opening during dental procedures.
  • 6.

    Retrospective Study of Survival Rates According to the Type of Dental Restoration of Proximal Caries in Primary Molars

    Jih Myeong-kwan | LEE, SANG-HO | LEE NAN YOUNG | 2015, 42(3) | pp.249~256 | number of Cited : 1
    Abstract PDF
    Restorative dental materials have advanced rapidly, with improved physical properties that improve survival rates. Accordingly, various materials can be selected. Amalgam, composite resin, glass-ionomer cement, and preformed stainless steel crowns have all been used widely for the restoration of dental caries in primary molars. The various dental materials used to treat proximal caries in the primary molars have distinct advantages and disadvantages. However, few studies have examined their survival rates. This retrospective study examined the 2-year survival rates of more than 700 class II restorations of proximal caries in primary molars clinically and radiologically according to the type of restoration. The study results should help in the selection of class II restorations for molars, one of the biggest concerns of pediatric dentists.
  • 7.

    Orthodontic Traction and Decompression Method in Treating Impacted Permanent Mandibular First Molars : Case Reports

    Jih Myeong-kwan | LEE, SANG-HO | LEE NAN YOUNG | 2015, 42(3) | pp.257~263 | number of Cited : 1
    Abstract PDF
    Impacted teeth occur at higher frequencies in permanent than primary dentition. The most frequently affected teeth are the maxillary and mandibular third molars, whereas it is quite uncommon for the mandibular first molar to be impacted. Treatment methods for impacted teeth include continuous examination for independent eruption, surgical exposure, subluxation after surgical exposure, orthodontic traction, and surgical repositioning. If all of these treatments fail, tooth extraction may be considered. In the first case study, an 8-year-old boy was treated with surgical exposure, after which he was fitted with an obturator. His mandibular first molar then erupted successfully. In the second case, we treated a 12 year-old boy using orthodontic traction. This study describes children with tooth eruption disorders of the mandibular first molar in mixed dentition, and reports acceptable results regarding treatment of the impacted teeth.
  • 8.

    Accidental Extrusion of Sodium Hypochlorite during Endodontic Treatment in a Primary Tooth

    김민지 | 김진영 | 임수민 | 2015, 42(3) | pp.264~269 | number of Cited : 1
    Abstract PDF
    Although sodium hypochlorite is the most frequently used canal irrigant during endodontic treatment, its complications are not as well recognized as its effectiveness. This report demonstrates that sodium hypochlorite extrusion during endodontic treatment can cause severe complications. A 5-year-old boy experienced immediate pain and swelling, ecchymosis in surrounding tissues, and profuse bleeding from the root canal during endodontic treatment, because of accidental extrusion of sodium hypochlorite. The patient was hospitalized, and analgesics and antibiotics were prescribed. Accidental extrusion of the irrigating solution occurs more frequently in teeth with immature apices, root resorption, and apical perforations; therefore, caution is needed. When such complications occur, proper management and medications are needed.
  • 9.

    Implant Placement in Growing Adolescents : a Literature Review

    SHIN HYUN SEUNG | 2015, 42(3) | pp.270~274 | number of Cited : 0
    Abstract PDF
    Although there are a number of studies on the treatment planning and the prognosis of dental implants, limited studies provide the information on the implant placement on growing adolescents. The aim of this review is to discuss the use of dental implants in growing patients and the impact of skeletal and dentoalveolar growth on the long-term stability of implants. The general information regarding skeletal growth of maxilla and mandible would be briefly reviewed and the general treatment options would be discussed.