2014, Vol.41, No.2

Journal of the Korean academy of pediatric dentistry 2023 KCI Impact Factor : 0.48

pISSN : 1226-8496 / eISSN : 2288-3819
https://journal.kci.go.kr/jkapd

The purpose of this study was to investigate the effect of various surface treatment methods on the shear bondstrength of orthodontic brackets in vitro. Ninety six specimens, 6 mm in diameter and 5 mm in height, were made with composite resin (FiltekTM Z350XT, 3M ESPE, USA) and treated with an aging procedure. After aging, the specimens were randomly separatedin six groups: (1) control with no surface treatment, (2) 37% phosphoric acid gel, (3) 4% hydrofluoric acid gel,(4) sodium bicarbonate particle abrasion, (5) diamond bur, and (6) 1 W carbon dioxide laser for 5s. The metalbrackets were bonded to composite surfaces by means of an orthodontic adhesive (Transbond XT, 3M Unitek,USA). Shear bond strength values were evaluated with a universal testing machine (R&B Inc., Korea). Analysis of variance showed a significant difference between the groups. Group 5 had the highest mean shearbond strength (11.9 MPa), followed by group 6 (11.1 MPa). Among the experimental groups, group 2 resultedin the weakest mean shear bond strength (5.22 MPa). The results of this study suggest that the repair shear bond strength of the aged composite resin was acceptableby surface treatment with a carbon dioxide laser.

The aim of this study was to investigate changes in treatment patterns within pediatric dentistry departmentsby analyzing the distribution of patients and treatment trends. To that end, treatment charts based on electronicmedical records (EMR) from the Yonsei University Dental Hospital from 2008 to 2012 were collected and analyzed. The results showed a decrease in the number of new patients and patients cared for by non-specialists, whilethe number of foreign patients has increased. The under 2 years-old group accounted for a large portion of newpatients. Dental caries, dental trauma, and malocclusion ranked as the top complaints. In terms of restorationtreatment, the proportion of patients receiving composite resin, amalgam, and sealant has decreased, whereasself-curing glass ionomer and preventive resin restoration have increased. Single-visit endodontic treatment hasbeen increasing, with a decreasing trend in multi-visit endodontic treatment. The rate of conservative pulptreatment, such as pulp capping and pulpotomy, has increased. For reducing patient anxiety, treatments undersedation have increased, especially with the use of nitric oxide. This investigation into the latest treatment trends and patient characteristics is expected to help pediatricdentists to make appropriate treatment plans.

The goal of this study was to describe dental consultation of pediatric inpatients to the department of pediatricdentistry at Yonsei University Severance Hospital. 391 dental consultations at Yonsei University SeveranceHospital referred to pediatric dentistry in the year 2012 were included in this study. Consultations were categorizedaccording to patients’gender, age, chief complaint, referred department and diagnosis. 288 patients (166males and 122 females) with an average age of 5.9 were referred to the Department of Pediatric Dentistry. 129cases (33.1%) from Department of Rehabilitation Medicine, 80 cases (20.5%) from Pediatric Hematology-Oncology, 51 cases (13.0%) from Pediatric Cardiology, and 44 cases (11.3%) from Pediatric Neurology. Chiefcomplaints were ranked from oral examination (39.7%), dental caries (14.0%), pre-operative evaluation(12.8%) and others (33.5%); including oral pain, trauma, tooth mobility, orthodontic treatment, self-injury,fabrication of obturator and etc. Dental consultations should be encouraged as dental care and treatment couldaffect the control of systemic diseases of admitted patients. Pediatric inpatients have been referred to pediatricdentistry for not only comprehensive oral exam but also various chief complaints. The most frequent dental diagnosismade and treatment performed were dental caries and non-invasive/preventive care respectively.