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Biomedical subjects

A Berbert

Publications and source records attributed to A Berbert.

At least 19 recordsLinked to original sources
PubMed1995

The influence of ultrasound in removing intraradicular posts.

Thirty single-rooted teeth were prepared to receive cast posts. After cementation of the post the teeth were divided into three groups. Group I did not receive any treatment, whereas the posts in groups II and III were treated with an ultrasonic device, for 2 min and 5 min, respectively. The force required for post removal was determined using a universal test machine. No statistical differences (P > 0.05) were found between the groups where ultrasound had been used. Significantly reduced forces were necessary to remove the posts from group II and III, compared with group I which did not receive ultrasonic treatment (P < 0.05).

Analysis of Variance↗
PubMed1995

The influence of ultrasound in removing intraradicular posts.

Thirty single-rooted teeth were prepared to receive cast posts. After cementation of the post the teeth were divided into three groups. Group I did not receive any treatment, whereas the posts in groups II and III were treated with an ultrasonic device, for 2 min and 5 min, respectively. The force required for post removal was determined using a universal test machine. No statistical differences (P > 0.05) were found between the groups where ultrasound had been used. Significantly reduced forces were necessary to remove the posts from group II and III, compared with group I which did not receive ultrasonic treatment (P < 0.05).

Analysis of Variance↗
PubMed1994

Effect of root canal status on periodontal healing after surgical injury in dogs.

This study was carried out to observe if the status of the root canal might influence the healing process of surgically prepared experimental periodontal lesions. Forty tooth roots from four dogs were divided into four different groups: a) root canals with vital pulps, b) root canals open to the oral environment, c) root canals infected and filled with zinc oxide eugenol cement, and d) root canals infected and filled with calcium hydroxide. By means of a surgical intervention, a cavity was prepared in the medium portion of the roots. Six months later, the specimens were removed and prepared for histological analysis. The results, which were submitted to statistical analysis, showed that the status of the root canals influenced the healing process of the experimental periodontal lesions. In the groups where the root canals were filled, calcium hydroxide gave the best results. In the group with root canals left open to the oral environment, resorption of the dentin of the experimental cavities, was the most obvious observation. However, it did not prevent the repair process, only slowed it down.

Analysis of Variance↗
PubMed1989

[Bleaching of devitalized teeth with ultrasonic assistance].

A new bleaching technique for pulpless teeth is demonstrated by a clinical case. The principle of the method is to clean the dentinal tubules by an 1% sodium hypochlorite solution activated by a 40 endosonofile. A mixture of sodium perborate and a 3% hydrogen peroxide is left in the pulp chamber between the treatment sessions.

Adult↗
PubMed1980

Effect of calcium hydroxide in powder or in paste form on pulp-capping procedures: histopathologic and radiographic analysis in dog's pulp.

The pulps of seventy dog teeth were evaluated histopathologically and radiographically following intentional exposure and treatment with either a calcium hydroxide powder or a calcium hydroxide paste prepared with distilled water. The results were recorded after periods of 2, 30, 70, and 120 days. No differences were detected in the pulpal responses to direct pulp capping achieved with a calcium hydroxide paste and with a calcium hydroxide powder.

Animals↗
PubMedDate not supplied

[Clinical evaluation of two tooth bleaching techniques].

The purpose of this paper was to assess the clinical ability of two bleaching techniques. Patients with at least one darkened teeth caused by mechanical injuries or imperfection in the endodontic therapy were included in this study. The first step was to take an initial photography. After that the teeth were subjected to the bleaching procedures. The techniques employed were proposed by NUTTING & POE or LACERDA et alii. The assessments were made by three trained examiners using the initial and final pictures. The scores were attributed according to the color of the teeth. The data were submitted to the statistical analysis, when was possible to verify that both techniques were equally effective.

Humans↗