Objective: The aim of this in vitro research was to assess if the different stratification techniques could influence the marginal gap in V class restoration. Material and methods: Standard 6 4 4 mm class V cavities were prepared on the buccal side of 24 extracted sound human premolars. Specimens were randomly divided in two groups: (A) Bulk filling technique; (B) Wedge-shape layering technique. The interfacial sealing ability of the stratification techniques was evaluated by scoring the 7% methylene blue penetration depth through optical microscope observations. The infiltration assessment was performed with a progressive score. Differences in infiltration scores recorded for the tested techniques were evaluated for statistical significance (Mann—Whitney U test, p < 0.05). Results: The A group showed a mean score of 1.166 1.114, registering the higher score of 3; the B group the mean score was 0.666 0.778, and a higher score of 2. The two tails Mann—Whitney analysis showed a 0.270 non-significant result. Conclusion: Considering the limitation related to the technique used for the infiltration analysis in small V class cavities, the infiltration score is not influenced by the different stratification techniques.
Objective:
The aim of this study is to compare the efficacy of rotary instruments vs hand scalers in non-surgical periodontal therapy, studying the variation of periodontal health indexes.
Materials and Methods:
Forty patients (age between 30 and 70 years) with advanced chronic periodontitis, that were recruited for the study, were divided into two groups; control group and test group. Control patients were treated with hand scalers while test group patients were treated with rotary instruments. Periodontal indexes were evaluated at baseline and after 3 months.
Results:
Nonsignificant differences were found at 12 weeks follow up for all the parameters between test and control groups.
Conclusions:
Within their limits, the results indicate that different instruments can be effective in removing calculus and endotoxins. This requisite is mandatory for a proper periodontal healing.
The reasons for clinicians to use diamond-coated instruments are related to a faster procedure, and the clinical evidence of a smooth root surface. The clinicians’ ability remains one of the most important variables that could affect periodontal therapy.
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