Background: The aim of this study was to compare the clinical outcomes of applying Bio-OssÒ, an anorganic bovine bone xenograft (control group) to the combined use of Bio-OssÒ and Bio-GideÒ (a bioabsorbable collagen membrane) (test group) in human mandibular Class II furcation defects. Methods: A total of 18 furcations (8 tests and 10 controls) in 14 patients suffering from chronic periodontitis were treated in this randomized clinical trial. Open vertical and horizontal furcation depths (OVFD and OHFD), vertical and horizontal clinical attachment levels (VCAL, HCAL), probing depth (PD) and free gingival marginal level (GML) were among the clinical parameters measured prior and six months after treatment, at re-entry surgery. The data were analysed by statistical tests while a p value less than 0.05 was considered significant. Results: At the surgical re-entry, the mean reduction for OVFD of the control and test groups was 1.9 ± 1.3 and 2.1 ± 1.0, and for OHFD 2.1 ± 0.7 and 2.4 ± 1.3, respectively. The control and test treatments resulted in significant reductions in PD, VCAL and HCAL measurements at re-entry but there was no statistically significant difference between the two treatments in all soft and hard tissues measurements. Conclusions: This clinical trial failed to demonstrate the superiority of the combined use of Bio-GideÒ and Bio-OssÒ to the use of Bio-OssÒ alone, although both therapies resulted in significant gains in attachment level and bone fill.
PurposeThe effects of magnetostrictive and piezoelectric devices on tooth surfaces seem to differ with regard to the root surface roughness they produce. This study aimed to compare the results of scaling using magnetostrictive and piezoelectric devices on extracted teeth.MethodsForty-four human extracted teeth were assigned to four study groups (n=11). In two groups (C100 and C200), the teeth were scaled using a magnetostrictive device and two different lateral forces: 100 g and 200 g, respectively. In the other two groups (P100 and P200), the teeth were scaled with a piezoelectric device with 100 g and 200 g of lateral force, respectively. he teeth were scaled and the data on the duration of scaling and the amount of surface were collected and analyzed using the t-test.ResultsThe mean time needed for instrumentation for the piezoelectric and magnetostrictive devices was 50:54 and 41:10, respectively, but their difference was not statistically significant (P=0.171). For root surface roughness, we only found a statistically
significantly poorer result for the C200 group in comparison to the P200 group (P=0.033).ConclusionsThis study revealed that applying a piezoelectric scaler with 200 g of lateral force leaves smoother surfaces than a magnetostrictive device with the same lateral force.
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