Root surface removal and resultant surface texture with diamond‐coated ultrasonic inserts: an in vitro and SEM study

Vastardis, Sotirios; Yukna, Raymond A.; Rice, David A.; Mercante, Don

doi:10.1111/j.1600-051x.2005.00705.x

Cited by 48 publications

(45 citation statements)

References 54 publications

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“…The hand instrumentation showed similar defect depth to that produced by the ultrasonic scaler. In a SEM evaluation, Vastardis et al (12) did not find any difference between these two forms of root instrumentation with regard to the defect depth, although other studies have reported less root substance removal by ultrasonic scalers compared to hand instruments (1,4). However, in a recent study, the piezoelectric scalers removed less root substance than hand curettes (13).…”

Section: Discussionmentioning

confidence: 77%

Root surface defect produced by hand instruments and ultrasonic scaler with different power settings: an in vitro study

et al. 2009

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The aim of this study was to evaluate the root surface defect produced by hand curettes and ultrasonic tips with different power settings. Forty root surfaces were divided into 4 groups according the treatment: Gracey curettes, ultrasonic scaler at 10% power, ultrasonic scaler at 50% power and ultrasonic scaler at 100% power. Each specimen was instrumented with 15 strokes and the and divided in the middle to evaluate: (1) the defect depth produced by the instrumentation and (2) contact area of the instrument tips, which was analyzed by scanning electron microscopy. ANOVA and Tukey's test were used for statistical analysis (a=0.05). The results (mean ± SD) of the contact area showed significantly greater defects (p<0.05) for the hand instrumented groups (2092.9 ± 482) compared to the ultrasonic groups (606.8 ± 283.0; 858.6 ± 422.5; 1212.0 ± 366.7, respectively), independently of the power setting. The values for the defect depth on root surface showed no statistically significant difference (p<0.05) between hand instrumentation (66.1 ± 34.0) and ultrasonic scaling at 10%, 50% or 100% power settings (52.4 ± 22.1; 72.0 ± 29.9; 77.7 ± 37.7, respectively). The findings of this study demonstrate that ultrasonic instrumentation produced a similar defect depth to that of hand instrumentation, with a smaller tip contact area, independently of the power setting used for scaling.

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Section: Discussionmentioning

confidence: 77%

Root surface defect produced by hand instruments and ultrasonic scaler with different power settings: an in vitro study

et al. 2009

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“…In fact, the effects of different periodontal instruments on the root surface roughness have often been investigated over the years and conflicting results have been found. Some investigations demonstrated no difference in the roughness of surfaces treated with either curettes or ultrasonic instruments 22 ; others demonstrated that the smoothest surfaces were produced by hand instruments 23,24 or by ultrasonic instruments. 25 With regard to the use of the Er:YAG laser, a previous investigation 12 found no differences in root surface roughness following Er:YAG laser irradiation and treatment with curettes.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Adhesion of Streptococcus sanguinis to Dentine Root Surface After Treatment with Er:Yag Laser, Ultrasonic System, or Manual Curette

Ota-Tsuzuki

Martins

Giorgetti

et al. 2009

Photomedicine and Laser Surgery

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“…The Ra value of the root surface has been reported to be in the range of 0.41–1.12 µm [4]. Various methods of root planing have been reported to produce a root surface roughness in the range of 0.35–4.90 µm depending on the instruments used [451314]. The plates with an Ra value corresponding to a high-nanometer dimension (867.0±168.6 nm) and a mid-nanometer dimension (505.3±115.3 nm) were rougher than the enamel surface and within the range of the Ra reported on the untreated root surface or the root surface after root planing.…”

Section: Methodsmentioning

confidence: 99%

Substrate roughness induces the development of defective E-cadherin junctions in human gingival keratinocytes

Jin

Lee

et al. 2017

J Periodontal Implant Sci

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PurposeThe entry of bacteria or harmful substances through the epithelial seal of human gingival keratinocytes (HGKs) in the junctional epithelium (JE) is blocked by specialized intercellular junctions such as E-cadherin junctions (ECJs). However, the influence of roughened substrates, which may occur due to apical migration of the JE, root planing, or peri-implantitis, on the development of the ECJs of HGKs remains largely unknown.MethodsHGKs were cultured on substrates with varying levels of roughness, which were prepared by rubbing hydrophobic polystyrene dishes with silicon carbide papers. The activity of c-Jun N-terminal kinase (JNK) was inhibited with SP600125 or by transfection with JNK short hairpin RNA. The development of intercellular junctions was analyzed using scanning electron microscopy or confocal laser scanning microscopy after immunohistochemical staining of the cells for E-cadherin. The expression level of phospho-JNK was assessed by immunoblotting.ResultsHGKs developed tight intercellular junctions devoid of wide intercellular gaps on smooth substrates and on rough substrates with low-nanometer dimensions (average roughness [Ra]=121.3±13.4 nm), although the ECJs of HGKs on rough substrates with low-nanometer dimensions developed later than those of HGKs on smooth substrates. In contrast, HGKs developed short intercellular junctions with wide intercellular gaps on rough substrates with mid- or high-nanometer dimensions (Ra=505.3±115.3 nm, 867.0±168.6 nm). Notably, the stability of the ECJs was low on the rough substrates, as demonstrated by the rapid destruction of the cell junction following calcium depletion. Inhibition of JNK activity promoted ECJ development in HGKs. JNK was closely associated with cortical actin in the regulation of ECJs in HGKs.ConclusionsThese results indicate that on rough substrates with nanometer dimensions, the ECJs of HGKs develop slowly or defectively, and that this effect can be reversed by inhibiting JNK.

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Root surface removal and resultant surface texture with diamond‐coated ultrasonic inserts: an in vitro and SEM study

Cited by 48 publications

References 54 publications

Root surface defect produced by hand instruments and ultrasonic scaler with different power settings: an in vitro study

Root surface defect produced by hand instruments and ultrasonic scaler with different power settings: an in vitro study

In Vitro Adhesion of Streptococcus sanguinis to Dentine Root Surface After Treatment with Er:Yag Laser, Ultrasonic System, or Manual Curette

Substrate roughness induces the development of defective E-cadherin junctions in human gingival keratinocytes

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