• Journal of the korean academy of Pediatric Dentistry
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• v.39 no.2
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• pp.199-205
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• 2012

Although the stainless steel crowns have been recognized as the most effective and durable form of restoration for primary molars, they have been regarded by many dentists as having definite demerits such as invasive nature of procedural complexity and behavioral aspects of children. As an alternative to conventional technique of stainless steel crown restoration, the Hall technique was first introduced in 1988, which is characterized by just pushing the pre-contoured, cement filled crown form onto the abutment molar with no local anesthesia, no caries removal, no tooth preparation. According to several reports, this can slow, arrest, or even reverse the progress of caries. In addition, its atraumatic feature gives less discomfort and stress to children than conventional one, which is thought excellent especially in younger children. Also, It has been reported to be effective and acceptable to dentist, child patients and their parents. In this case study, three children with age of 4 years 5 months, 4 years 10 months, 6 years 4 months were treated with stainless steel crowns using Hall technique on first primary molar respectively. The teeth were free from pulpal, periapical pathology. After follow up of about 3 to 6 months period, the results showed clinically successful outcomes without any marked complication in pulp, tooth or soft tissue till now. But, it should be kept in mind that this technique is not proper to every child, every carious molar, or every dentist. Thorough distinction of indicated cases and continuous follow-up check is highly required. Conclusively, Hall technique might be an effective and realistic minimally invasive alternative for the carious primary molars especially in younger or disabled children, despite potential doubts on its efficacy and some definite limitations.

• Journal of the korean academy of Pediatric Dentistry
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• v.28 no.4
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• pp.600-612
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• 2001

The purpose of this study is concerned with an investigation of the actual condition of traumatic injuries of teeth and supporting structures in children to set up possible criteria for prevention and treatment of injured teeth. The materials consisted of the clinical records of 431 traumatically injured teeth of 212 children, accumulated during two years from the first of April in 1998 to the end of March in 2000, supplied from the Dept. of Pediatric Dentistry, Chonbuk National University Hospital. The incidence of injuries in boys was extremely high for permanent teeth, twice as high as in girls. Accidents to primary teeth were most common from 1 to 2 years of age and to permanent teeth were most from 8 to 9 years of age. The most common cause of trauma was a fall for both primary and permanent teeth, followed by collision. The anterior teeth in maxilla was most frequently affected by trauma in both the primary and permanent teeth. The most common type of trauma were loosening for the primary teeth, followed by luxation types which included the intrusion, displacement and extrusion and complete avulsion types. For the permanent teeth, the most common type of trauma were tooth fracture. The most common trauma of soft tissue was laceration of upper lip, lower lip and gingiva of maxilla Concerning treatment at the first visit, primary teeth with only loosening and concussion were not usually treated. Permanent teeth were often treated by crown restorations for crown fractures and by endodontic procedures for pulpal exposure. Though we could elucidate actual condition of traumatic injuries of teeth in children, we should make a follow-up survey to ensure the prognosis of injured teeth and establish the most desirable criteria for traumatized teeth in children.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.3
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• pp.431-438
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• 2003

This study investigates pulp chamber temperature rise during composite resin polymerization by plasma arc(Group III : Flipo 3 sec, Group IV : Flipo 5 sec) and LED curing units(Group V : Lux-O-Max, 40 sec) as well as conventional halogen lamp curing units(Group I : VIP mode3, 20 sec, Group II : VIP mode6, 20 sec). The results are as follows : 1. All of the investigated pulp chamber temperature rises are lower than the boundary temperature could result in irreversible damage to the pulpal tissue ($5.5^{\circ}C$). 2. In the group II, it is found the significantly higher pulp chamber temperature rise than any other groups(p<0.05). 3. In the group of composite resin light-cured with VIP, it is found the significantly higher pulp chamber temperature rise in the group II than group I(p<0.05). 4. In the group of composite resin light-cured with Flipo, it is found the significantly higher pulp chamber temperature rise in the group IV than group III (p<0.05). 5. In the case of comparing VIP and Flipo, group II is significantly higher pulp chamber temperature rise than group III, IV(p<0.05), and group IV is significantly higher pulp chamber temperature rise than group I(p<0.05), and it does not significantly differ between group I and III. 6. In the group of composite resin light-cured with Lux-O-Max, it is found the significantly lower pulp chamber temperature rise than any other groups (p<0.05).

• Journal of the korean academy of Pediatric Dentistry
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• v.29 no.2
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• pp.146-158
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• 2002

The purpose of this study was to investigate the effects of Nd:YAG laser on mechanically exposed pulp of dog by the observation of pulpal inflammatory change and heal process including dentinal bridge, structural changes of fibroblasts of thr remaining vital pulp tissue. In experimental group 1, the exposed pulps were irradiated with Nd:YAG laser(3W, 30Hz, 0.2sec) for $2{\sim}3$ second followed by capped with aluminium tin foil. In group 2 and group 3, the exposed pulps were irradiated with Nd:YAG laser via contact(Group 2) and non-contact(Group 3) methods followed by capped with calciumhydroxide paste. The animal were sacrificed at the intervals of 3, 7, 14 and 30days for histologic evaluation. The results were as follows : 1. The dentinal bridges were formwd more fast and broadly in the experimental group 1 and 2 than other groups, but there were no histologic differences in the degree of their formation among control group, experimental group 1. 2. Odontoblastic activities at amputated pulp was increased in the experimental group 2, 3 than other group but there no histologic difference in the odontblastic activitiy among control group, experimental group 1. 3. The infalmmation was severe at the postoperative 1 week of all groups, but its condition subsideed with time elapsed. At the postoperative 3, 7 days, its condition in experimental group 2, 3 were less severe than in the group 1. 4. There were no histologic differences between the experimental group 2 and 3 according to the degree of dentin bridge formation.