Clinical characteristics and complications associated with mesiodentes.

Purpose: The purpose of the present study was to analyze the clinical characteristics and complications of patients with mesiodens.

Patients And Methods: Using the radiographic reviews of patients who visited Seoul National University Dental Hospital from January 2005 through January 2008, 919 patients were identified as having mesiodens (total 1,200 mesiodentes). The number, location, position, eruption status, shape, direction, and complications of the mesiodens and gender and age were collected and analyzed.

Mutational hot spot in the DSPP gene causing dentinogenesis imperfecta type II.

The current system for the classification of hereditary defects of tooth dentin is based upon clinical and radiographic findings and consists of two types of dentin dysplasia (DD) and three types of dentinogenesis imperfecta (DGI). However, whether DGI type III should be considered a distinct phenotype or a variation of DGI type II is debatable. In the 30 years since the classification system was first proposed, significant advances have been made regarding the genetic etiologies of inherited dentin defects.

Effect of ultrasonic vibration on dentin bond strength and resin infiltration.

Purpose: To apply a vibration technique to compare the bond strength and resin penetration depth into the dentin tubules with those gained using conventional techniques.

Methods: Eighty-eight noncarious extracted human permanent molar teeth were sectioned to remove the coronal enamel. They were embedded in a 1-inch PVC pipe with an acrylic resin.

Early childhood caries: prevalence and risk factors in Seoul, Korea.

Objective: The purpose of this study was to determine the prevalence of early childhood caries (ECC), including noncavitated lesions (d1), in children 6-59 months of age in relation to socioeconomic factors, feeding practices, and oral health behaviors in Seoul, Korea.

Methods: The children attended child care facilities and were selected from 32 primary sampling units. Two dentists examined 470 children.

Reposition of intruded permanent incisor by a combination of surgical and orthodontic approach: a case report.

This report presents a case of a completely intrusive luxation of an immature permanent central incisor in a 7 years 9 months-old girl. Because there are severe intrusive trauma and cortical alveolar bone fracture, it was impossible to reposition with orthodontic or surgical method alone. The intruded tooth was repositioned to healthy alveolar bone level by using surgical extrusion and stabilization with sutures and periodontal pack.

Effect of curing method and curing time on the microhardness and wear of pit and fissure sealants.

Objective: To evaluate the effects of a light source, polymerization time and storage time on the microhardness and wear of pit and fissure sealants.

Methods: Five commercial pit and fissure sealants (Fissurit F [FF], Teethmate F1 [TF], Apollo Seal [AS], Concise [CC], and Ultraseal XT Plus [US]) were used. Specimens were cured with a conventional visible light curing unit (Curing Light XL 3000) for 10, 20, 30, 40s or with a plasma arc light curing unit (Apollo 95E) for 3, 6, 9, 12s.