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Biomedical subjects

A Chosack

Publications and source records attributed to A Chosack.

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

Comparative clinical study of autopolymerized and light-polymerized fissure sealants: five-year results.

The retention of autopolymerized and light-polymerized Delton fissure sealants was compared. Sealants were applied to 207 first permanent molars with 304 separate sites in 73 children 6-8 years old (mean age 6.3 years). After five years, there was complete retention in 59% of the autopolymerized and 48% of the light-polymerized sealants. The resulting 11% difference in retention rates was not statistically significant at P less than 0.05.

Acrylic Resins↗
PubMedDate not supplied

Two-year evaluation in vivo and in vitro of Class 2 composites.

Nineteen class 2 Herculite restorations were evaluated two years after placement. Nine of these were retrieved and examined by clinical inspection out of the mouth. Six of the restorations were then removed and the cavities examined for extent and location of discoloration and secondary caries. Radiolucent defects at the gingival margins were seen in 36% of the teeth. Gaps were evident in 58% of the gingival margins of the retrieved teeth. Secondary caries was diagnosed in four cases, all of them at the cervical margin. Examination of the cavities after removal of the composite resin demonstrated the penetration of the carious process into the dentin.

Child↗
PubMedDate not supplied

An evaluation of marginal leakage of Class 2 combined amalgam-composite restorations.

Forty class 2 cavities were prepared in 20 permanent posterior teeth. In 20 cavities the gingival margin was placed in enamel and in the other 20 cavities in cementum. In every tooth one of the cavities was filled with composite and the other with a combined amalgam-composite restoration. Microleakage at the various interfaces was assessed by dye penetration. It was concluded that microleakage of the combined amalgam-composite restorations was significantly lower than that of the conventional composite restorations.

Bicuspid↗
PubMedDate not supplied

In vitro assessment of the effect of Scotchbond on the marginal leakage of class II composite restorations in primary molars.

By means of dye penetration, the authors determined the microleakage at the interface of class II composite restorations in thirty-eight extracted or naturally exfoliated primary molars. Scotchbond was used as the bonding agent in half of the prepared cavities' dentin and enamel; the control group (B) used Concise bonding agent in the enamel only. The use of Scotchbond in class II cavities did not prevent marginal leakage under the conditions of this study.

Adhesives↗
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

Long-term followup of traumatized incisors treated by partial pulpotomy.

The purpose of this study was to assess the long-term success of partial pulpotomy in traumatized permanent incisors. Seven years before this examination, 63 teeth that had been treated by partial pulpotomy six months to four years earlier were examined. At that stage, four teeth had pulp necrosis. The remaining 59 cases were recalled for re-examination. Of these, 40 were available for assessment 7.5 to 11 years after the partial pulpotomy treatment. Thirty-five of these teeth were successful, while the remaining five had root canal fillings, and three of them were restored by post and crowns. Of these, two were root treated in consequence of new trauma, and the other two for esthetic purposes. The fifth tooth has probably been root treated for similar reasons, as the patient reported not having had any pain or problem with the tooth. The high frequency of long-term success justifies recommending partial pulpotomy as the treatment of choice for traumatic pulp exposures in crown-fractured permanent incisors.

Dental Pulp Exposure↗
PubMedDate not supplied

Temperature elevation in children following dental treatment under general anesthesia with or without prophylactic antibiotics.

Bacteremia, tissue damage, and dehydration are mentioned frequently as factors that might be responsible for postoperative temperature elevation (PTE). In a prospective, randomized, double-blind, placebo-controlled study, the influence of a single dose of oral amoxicillin administered 1 hr prior to the procedure on PTE was examined. Twenty-six healthy children (21 boys and 5 girls) 2 to 5 years old, who received dental treatment under general anesthesia (GA) were evaluated. Anesthesia was maintained with nitrous oxide and Fluothane and the patients were well-hydrated intravenously during the procedure. Half of the children received prophylactic antibiotic 1 hr prior to the procedure. The other half received a flavored syrup as placebo. Thirteen patients (50%) presented PTE (rectal temperature > or = 37.9 degrees C) 2-5 hr after extubation. The results were statistically analyzed using ANOVA. However, no association was found between PTE and antibiotic administration or any of the parameters investigated such as, number of dental procedures, type of treatment performed, patient's weight, or change in temperature during dental treatment. (Pediatr Dent 15:99-103, 1993).

Amoxicillin↗
PubMedDate not supplied

Clinical evaluation of Class II combined amalgam-composite restorations in primary molars after 6 to 30 months.

Composites are claimed to be inappropriate for Class II restoration due to polymerization shrinkage. The present study evaluated the clinical and radiographic appearance of Class II combined amalgam composite restorations in primary molars. Conventional cavities (groups A & B) were restored with 1mm thick amalgam at the cervical floor covered by a posterior composite (Estilux Posterior). In group A Amalgambond was placed between the layers: in group B conventional enamel bond was applied. Vertical increments of Estilux Posterior over enamel bond restored cavities of group C. A fluted carbide bur and Sof-lex discs finished all restorations. Criteria developed by Cvar & Ryge (1971) were used for clinical evaluation of 39 restorations (12, 16 and 11 of Groups A, B and C respectively). No complaints of pain or discomfort were reported during the 6-30 months (mean 15.3) follow-up period. All groups presented excellent surface appearance. Ninety-two percent of group A and 100 percent of groups B & C presented excellent marginal adaptation. Anatomic form was excellent in 92 percent, 8 percent and 100 percent of groups A, B and C respectively. The underlying amalgam was visible through the composite of groups A & B reducing the percentage of excellent ratings of color match to 33 percent and 38 percent respectively, with 9 percent in Group C. This difference was significant (P < 0.02). Secondary caries was observed in two teeth (group A & C). Radiographs presented radiolucent area at the amalgam-composite interface only in one restoration (group A) and one at the tooth-composite interface (group C). Bubbles were found in 6.6 percent of group A; 12.5 percent of group and 64 percent of group C (p < 0.01). This study detected differences between the groups only in color match and the presence of bubbles.

Child↗