The Journal of the Philippine Dental Association最新文献

The purpose of this study was to determine the effectiveness of the three antimicrobials--Minocycline HCI, Erythromycin and Ampicillin based on the percentage reduction of bacteria present in subgingival microflora and in vitro assessment of antibiotic susceptibility of cultured strains of predominant microorganisms present in a diseased periodontium. Twelve volunteers 18 to 65 years of age, with moderate to severe periodontal disease, were randomly divided into Group A and Group B of 6 members each. Oral lavage procedure was performed to Group A and Group B received systemic administration of antibiotic for five days. Patients 1 & 2, 3 & 4 and 5 & 6 received minocycline HCI, Erythromycin and Ampicillin respectively. Microbiologic samples in the subgingival crevicular area in selected tooth exhibiting clinical periodontal breakdown were obtained from all the subjects prior to and after the oral lavage procedure and systemic drug administration. Streptococcus viridans is the most predominant aerobic microorganism obtained from 83% of samples. However no anaerobic microorganism has been isolated. Bacterial sensitivity testing showed 60% of samples with positive growth of microorganisms (S. viridans) were also equally sensitive to Minocycline HCI, Erythromycin and Ampicillin. Oral lavage proved to be ineffective in reducing the number of bacteria. However, systemic drug administration revealed that there was a reduction in bacterial count after taking such antibiotics for five days which is more favorable to Minocycline HCI.

With the increasing demand for cast restorations, the effect and influence of crown margins on the periodontium brought about many researches. These researches on crown margins were categorized by Gardner (1982) into three (3) broad categories namely: location, configuration and fit. Researchers on the influence of location of crown margins in the preparation of restorations, whether they be 1) supragingival 2) at the crest of the gingival margin or 3) subgingival, on the adjacent periodontal tissues had led to results which either supported the placement of cast restorations at one location level, that is, supragingivally, or those that support the view that the location of crown margins do not seem to significantly affect the periodontium.

Scalpel incision, cryosurgery as demonstrated by the use of dry ice, and electrocautery have different effects both clinically and histologically. Twelve hamsters of equal weight were divided into four study groups to compare which of the three methods of incision initiates a faster healing capacity. Surgical incisions were made of equal depths and were observed after 2, 5, 10 and 12 days. Results showed a marked cellular infiltration in electrocautery as compared with the scalpel incision method and the dry ice incision.

This study was conducted to compare the effectiveness and the degree of patient acceptability of the three techniques of mandibular nerve block, namely the classical, the Akinosi and the Gow-Gates. Forty five patients with mandibular posterior tooth/teeth indicated for extraction were chosen and divided equally into three groups to represent the three techniques of mandibular nerve block. Following the administration of the local anesthetic, the patients were evaluated using the evaluation sheet prepared for the study. Tabulation and analysis of the collected data followed. Results show that the Gow-Gates technique was the most effective in inducing anesthesia while the Akinosi technique appeared to be the most acceptable among the patients.