Evaluation of the modern self-etching adhesives efficacy

The durability of bonding efficacy of composites with hard tissues of a tooth was investigated at application of one-bottle adhesive with total etching and five self-etching adhesives. The efficiency of etching by 36% orthophosphoric acid and acid components of self-etching adhesives was estimated. The adhesion between substrate and composite was measured by method of microtensile bond strength (mTBS). The control of efficiency of etching and depth of the penetration was carried out with the confocal laser scanning microscopy. It was established, that self-etching adhesives are capable to guarantee bonding of composites with enamel and dentine at a level compared with adhesives of the 5th generation. Deep adhesives penetration in dentine tubules is not the key factor for creation of reliable bonding.     

Covariates of tooth-brushing frequency in low-income African Americans from grades 5 to 8

PURPOSE: The purpose of this study was to examine tooth-brushing frequency in 575 urban and nearby suburban African American children as part of a comprehensive risk-reduction study for students at high risk for violence, drugs, school delinquency, and unsafe sexual behaviors to determine which covariates predicted tooth-brushing frequency. METHODS: Students were surveyed 5 times, from the beginning of grade 5 and the end of each year through grade 8, and parents were surveyed at the beginning of grade 5. Peer influence, importance of being liked, self-esteem, attitudes towards tooth-brushing, oral health knowledge, self-efficacy, parental attitudes, and other covariates were examined for the ability to predict self-reporting of tooth-brushing frequency. RESULTS: In the fifth grade, peer influence, the importance of being liked, and physical self-esteem were the significant predictors, and peer influence continued to predict tooth-brushing in the eighth grade. Oral health knowledge and parental influence were not significant. CONCLUSION: Peer influence is an important factor in tooth-brushing behavior in metropolitan African American preadolescent children.     

Evaluation of residual monomer elimination methods in three different fissure sealants in vitro

The aim of this study was to determine the concentration of residual monomers and to evaluate the effectiveness of elimination methods of residual monomers in three different fissure sealant materials (Helioseal F, Filtek Flow and EXM-510). The sealant materials were divided into four subgroups because of the treatment methods used; one control group and three experimental groups (cotton roll, rubber cup and prophylaxis paste in cup). High performance liquid chromatography was used to determine the concentrations of residual monomers. Results of the study showed that residual Bis-glycidyl dimethacrylate elution was the highest in Helioseal F and the lowest in Filtek Flow with the three methods tested. For triethleneglycol dimethacrylate, EXM-510 eluted the highest residual monomer. It was also found that although the three tested methods were insufficient for removing all of the residual monomers and rubbing with cotton rolls was more effective than other two methods.     

Antibody formation to dog pulp tissue altered by formocresol uithin the root canal.

After pulpal extirpation of twenty teeth in each of five dogs, these animals were primarily immunized intramuscularly by combining formocresol with the dog's own pulp (three dogs), saline solution with pulp (one dog) and injecting sheep erythrocytes (one dog). A sixth dog was used as a control for the Arthus skin test. Secondary immunizations were accomplished via the root canal every 7 days over a 28-day period. Arthus skin-test reactions demonstrated less of a response to the formocresol alone than when the dogs' pulp was conbined with this material. In vitro analysis of hemagglutinating antibody titer showed a tremendous increase when pulp was incubated with formocresol as compared to the saline-treated pulp. Therefore, dogs' pulp tissue became antigenically altered by the formocresol recognized by the host, and a specific humoral response resulted.     

Fabrication of a single posterior intermediate restoration

Intermediate or temporary crowns are important in cast restoration procedures. A techniques is suggested whereby a metal shell crown is relined with autopolymerizing acrylic resin. It produces a restoration that (1) has good adaptation, (2) maintains gingival tissue health, (3) provides proximal and occlusal contacts, and (4) maintains tooth position.     

The effect of treatment provided by dentists and therapists in the South Australian school dental service. The second report

A survey of over 2,000 second year high school students at 13 South Australian schools indicated that those who had received school dental care at primary school had fewer carious teeth and, in some respects, better oral hygiene habits. Whilst they were better informed on dental subjects than were control students, fewer had attended a private dentist since leaving primary school.     

Neurofibroma of the maxillary antrum.

A rare case of neurofibroma of the maxillary antrum is reported. The tumor was removed via a Caldwell-Luc approach. Its histopathologic characteristics are described.