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Histological and profilometric evaluation of the root surface after instrumentation with a new piezoelectric device – ex vivo study
Author(s) -
Silva D,
Martins O,
Matos S,
Lopes P,
Rolo T,
Baptista I
Publication year - 2015
Publication title -
international journal of dental hygiene
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 38
eISSN - 1601-5037
pISSN - 1601-5029
DOI - 10.1111/idh.12091
Subject(s) - cementum , dentistry , medicine , scaling and root planing , ultrasonic sensor , ultrasound , ex vivo , smear layer , significant difference , dental cementum , calculus (dental) , orthodontics , biomedical engineering , in vivo , periodontitis , radiology , dentin , microbiology and biotechnology , chronic periodontitis , biology
Objectives An ex vivo model was designed to profilometrically and histologically assess root changes resulting from scaling with a new ultrasonic device, designed for bone piezoelectric surgery, in comparison with curettes. Methods Three groups of 10 periodontal hopeless teeth were each subjected to different root instrumentation: Gracey curettes ( CUR ); ultrasonic piezoelectric device, Perio 100% setting, level 8 (P100); and ultrasonic piezoelectric device Surg 50% setting, level 1 (S50). After extraction, all teeth were photographed to visually assess the presence of dental calculus. The treated root surfaces were profilometrically evaluated (Ra, Rz, Rmax). Undecalcified histological sections were prepared to assess qualitative changes in cementum thickness. Statistical analysis was carried out using one‐way anova test with a significance level of 95%. Results Both instruments proved to be effective in the complete removal of calculus. The CUR group presented the lowest Ra [2.28 μm (±0.58)] and S50 the highest [3.01 μm (±0.61)]. No statistically significant differences were detected among the three groups, for Ra, Rz and Rmax. Histologically, there was a cementum thickness reduction in all groups, being higher and more irregular in S50 group. Conclusions Within the limits of this study, there were no statistically significant differences in roughness parameters analyzed between curettes and the ultrasonic piezoelectric unit. This new instrument removes a smaller amount of cementum, mainly at the Perio 100% power setting, which appears to be the least damaging. The ultrasonic device is effective in calculus removal, proving to be as effective as curettes.