PubMed Health⌕ Search

Biomedical subjects

M Houpt

Publications and source records attributed to M Houpt.

46 records · Page 3Linked to original sources
PubMedDate not supplied

Occlusal restoration using fissure sealant instead of "extension for prevention".

This study was conducted to determine the success of a conservative cavity preparation using the principle of "sealing for prevention" rather than cavity "extension for prevention". Three hundred and twenty one restorations were placed in 234 teeth of 110 subjects, ages six to fourteen, with a mean age of eight years. After three years, 273 restorations were examined. Caries appeared in ten teeth and sealant wear occurred in sixteen restorations. Complete sealant loss was observed in two restorations and partial loss in thirty-nine, leaving 224 restorations with complete retention of the sealant. These preliminary results demonstrate that conservative cavity preparation with sealing for prevention is a successful technique which conserves valuable tooth structure.

Adolescent↗
PubMedDate not supplied

Fluoride exchange from glass ionomer preventive resin restorations.

The purposes of this in vivo study were to determine if placing a sealant over a glass ionomer restoration modifies its fluoride release, and to examine the effect on glass ionomer of a 4-min application of topical fluoride. Fluoride release from glass ionomer preventive resin restorations placed in 21 bovine teeth was measured before and after removing their sealants. Fuji II, Ketac Silver, and Fuji LC were evaluated, representing the three generations of glass ionomers. Fluoride was extracted from the restorations by incubating the specimens in 5 ml deionized water and was measured by specific ion electrodes at 1 and 2 days, then once weekly for 7 weeks. The results indicated that fluoride release was not significantly different in pattern or quantity in the three types of ionomer (P > 0.05). A significant reduction in fluoride release occurred when the restorations were covered with a sealant when compared with control restorations of the same materials (P < 0.001). After removing the sealant from the glass ionomer preventive resin restorations, a significant release of fluoride occurred when compared with sealed restorations (P < 0.001). After 63 days in water, the unsealed restorations were subjected to a 4-min topical APF treatment and reimmersed in water for an additional 27 days to examine the ability of the various materials to absorb fluoride. The fluoride-depleted restorations treated with fluoride released significantly more fluoride than fresh, untreated ionomer restorations (P < 0.001) or amalgam restorations. As a result of fluoride release, the glass ionomer preventive resin restoration may afford chemical protection to the tooth if sealant loss occurs.

Absorption↗
PubMedDate not supplied

Project USAP the use of sedative agents in pediatric dentistry: 1991 update.

A national survey of members of the American Academy of Pediatric Dentistry was conducted to update information on the use of sedative agents by pediatric dentists. All 2532 members of the Academy were sent questionnaires regarding their use of sedation and 1497 responded. Practitioners were questioned regarding how frequently they used sedative agents and the nature of patients receiving sedation. In addition, they were questioned on reasons for change, if any, in their use of sedation during the past two years. A separate survey was conducted of directors of all 55 postdoctoral training programs in pediatric dentistry. Forty-six directors responded to questions concerning the type and frequency of sedation use in their programs. Both surveys demonstrated wide differences in sedation use between different training programs and between different practitioners. The heavier use of sedation by some practitioners or by some training programs, as compared with others, generally was not related to the percentage of handicapped patients who received sedation, nor to the type of training. Frequent users of sedation (more than once each day) were located more in the south/southeastern and western parts of the country and they tended to have been in specialty practice for more than 10 years.

Chi-Square Distribution↗
PubMedDate not supplied

Caries experience and cariogenic markers in HIV-positive children and their siblings.

The purpose of this cross-sectional, masked study was to compare the oral status of perinatally HIV-infected children with their uninfected siblings living in the same environment. A secondary purpose was to compare HIV-positive children for differences in oral health with respect to disease advancement. One hundred forty-seven children were examined in their homes and meeting places, using NIH criteria for caries diagnosis. Significant differences were found in the number of caries-free children (P < 0.05), past caries experience (P < 0.003), subsurface demineralizations (P < 0.0001), and caries-related bacteria (P < 0.05). However, differences in caries prevalence were not found in the 3- to 6-year-old subgroup. Caries prevalence (P < 0.001) and levels of caries-related flora in saliva were correlated to years since diagnosis (mutans streptococci P < 0.008, lactobacilli P < 0.02). Children with a more advanced disease stage had significantly more caries (P < 0.02). Among the HIV-infected children, the frequency of carbohydrate intake was clearly correlated to caries (P < 0.003) and to lactobacilli levels (P < 0.0001). It is concluded that children with perinatally acquired HIV are at greater risk for caries than their siblings, more so with advancing disease.

Adolescent↗
PubMedDate not supplied

Fluoride uptake by proximal surfaces from professionally applied fluorides: an in vitro study.

This study was performed to examine the uptake of fluoride by mesial enamel surfaces of extracted teeth from different types of topical fluoride. Forty-eight extracted human molars and twelve premolars were randomly divided into four groups and mounted in twelve wax blocks with five teeth in proximal contact in each block. Each group was treated for four minutes with either 1.23 percent acidulated phosphofluoride conventional gel, thixotropic gel, or foam in lined trays, or 2 percent neutral sodium fluoride solution applied with a cotton tip applicator. Acid-etch biopsies were performed three times to indicate the amount of fluoride uptake at three different depths. The results demonstrated that there was a statistically significant increase in fluoride uptake in the surface layer with both gels and foam (1150, 1058 and 1120 ppm F), whereas there was an insignificant increase with the fluoride solution (27 ppm F). In the deepest layer, the thixotropic fluoride produced the greatest fluoride uptake (919 ppm F) in comparison with the uptake from conventional gel (383 ppm F), foam (297 ppm F), or solution (118 ppm F).

Acid Etching, Dental↗