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Biomedical subjects

H Ulvestad

Publications and source records attributed to H Ulvestad.

At least 19 recordsLinked to original sources
PubMed1978

Discoloration of permanent front teeth in 3,157 Norwegian children due to tetracyclines and other factors.

During routine orthodontic screening in Oslo, Norway, of 3,157 children, aged 1--11 years and born in 1963/64, 36 cases (1.14%) with cosmetically marring discoloration of permanent front teeth were registered. Thirty-four of them arrived for a more exhaustive examination, which in 24 of the children revealed positive tetracycline fluorescence on exposure to ultraviolet light. In 13 (0.4%) of the children, the discolorations were diagnosed to be tetracycline-induced. Enamel hypoplasia was frequently found in teeth with positive fluorescence. Multiple exposures to various tetracyclines were reported in all children who exhibited positive fluorescence.

Child↗
PubMed1978

A 5-year evaluation of semipermanent composite resin crowns.

The use of composite resin crowns in the restoration of traumatized and hypoplastic permanent incisors has proved to be of great clinical and aesthetic value for the pedodontic practice. Due to the composite resin materials and the acid etch technique, an easy method of making and retaining the restorations is at hand. The present study deals with long-term observations of composite resin crowns in restoring Ellis Class II and Class III coronal fractures of traumatized permanent incisors. In all, 253 composite resin crowns were controlled every year for a minimum of 5 years. In no case was an intermediate resin layer applied on etched enamel before the restoration material was placed. Surface, marginal and "body" discoloration, marginal leakage, marginal caries, abrasion, and fractures were controlled. The study demonstrated that discoloration of the surface of the restorations, and a discoloration of the restorative material not restricted to its surface ("body" discoloration) were the most frequent causes for considering the crowns as semipermanent restorations. The other factors seemed to be of minor clinical significance.

Adolescent↗
PubMed1978

A 48-month evaluation of fissure sealing with a diluted composite material.

The idea of pit and fissure sealing has found wide acceptance in caries prevention. The present investigation evaluates the retention of a diluted composite material (Concise Enamel Bond System) used as a pit and fissure sealant. On the basis of a clinical evaluation in 63 children of the retention of the material for 48 months, it seems justified to assume that a diluted composite material is a fully acceptable alternative to other fissure-sealing materials.

Bicuspid↗
PubMed1977

Hardness testing of some fissure-sealing materials.

The mechanical properties of fissure-sealing materials are of significant importance for their durability, i.e. their wear resistance. One of the methods of evaluating a material's resistance to attrition is to apply a hardness test. In the present investigation, the surface hardness of some fissure-sealing materials was tested. Sealants made from diluted composite materials and with inclusion of inorganic filler particles appeared to have a considerable higher surface hardness than the other sealing materials tested.

Composite Resins↗
PubMed1976

A 24-month evaluation of fissure sealing with a diluted composite material.

The idea of pit and fissure sealing has found wide acceptance in caries prevention. The present investigation evaluates the retention of a diluted composite material (Concise Enamel Bond system) used as a pit and fissure sealant. On the basis of a clinical evaluation in 69 children of the retention of the material in pits and fissures for 24 months, it seems justified to assume that the diluted composite material is an acceptable alternative to other fissure-sealing materials.

Child↗
PubMed1976

Evaluation of fissure sealing with a diluted composite sealant and an UV-light polymerized sealant after 36 months' observation.

The idea of fissure sealing has found wide acceptance in caries prevention. The present investigation was initiated to evaluate the retention of a diluted composite material used as a fissure sealant, compared with the retention of an UV-light polymerized sealant. After an observation period of 3 years, it seems justified to assume that a diluted composite sealant is a fully acceptable alternative to an UV-light polymerized sealant, and the former material seemed to have some advantages: a simpler polymerization procedure, an apparently better wear resistance due to ceramic filler particles, and an easier recognition because of a slight discoloration.

Acrylates↗
PubMed1975

[Sale and use of fluoride tablets in Norway].

Fluoride tablets and lozenges have been marketed in Norway since 1963. Until 1971, the consumption was very moderate and less than one per cent of the children between 0 and 12 years of age used fluoride tablets or lozenges. In 1971 a campaign of information was started. Since then it has been a marked increase in the sale (Fig. 1). Estimated from the sale figures, about 15--20 per cent of all Norwegian children used fluoride tablets or lozenges in 1974. There were, however, rather large variations between the different counties (Table 1). In the present paper, the importance of giving fluoride supplement from early childhood is emphasized. The role of dentists, physicians, dental hygienists, and health nurses in promoting dental health in children is discussed.

Administration, Oral↗