Effect of autoclaving on the surfaces of <scp><scp>TiN</scp></scp>‐coated and conventional nickel–titanium rotary instruments

Spagnuolo, Gianrico; Ametrano, Gianluca; D’Antò, Vincenzo; Rengo, Carlo; Simeone, Mariarosaria; Riccitiello, Francesco; Amato, Massimo

doi:10.1111/j.1365-2591.2012.02088.x

Cited by 46 publications

(40 citation statements)

References 43 publications

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“…The positive change of color in the teeth treated with laser activation was evident both in the values detected by the spectrophotometer than those recorded on the color scale, this result was evaluated in the gingival third of the crown or in the elements with a higher chroma value [25]. …”

Section: Discussionmentioning

confidence: 99%

Clinical and Spectrophotometric Evaluation of LED and Laser Activated Teeth Bleaching

Giudice¹,

Pantaleo²,

Lizio³

et al. 2016

TODENTJ

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Background:Auxiliary power sources (LED and laser) are used in in-office teeth bleaching techniques to accelerate the redox reaction of the whitening gel to increase ease of use, to improve comfort and safety, and to decrease the procedure time.Objective:The aim this study is to evaluate the efficiency of the teeth whitening procedures performed with hydrogen peroxide and carbamide peroxide, LED or Laser activated.Method:18 patients, affected by exogenous dyschromia, were treated with a bleaching agent composed by 35% hydrogen peroxide and 10% carbamide peroxide. They were divided into two groups: in the first group the bleaching agent was activated by a LED lamp; in the second group it was activated by a Laser diode lamp. Both groups were subjected to 3 bleaching cycle of 15’ each. The chromatic evaluations were performed before and after one week from the treatment, using a chromatic scale and a spectrophotometer. The mean value of pre, post bleaching and follow-up were analyzed using a T-test, with results statistically significant for P<0,05.Results:Results showed that the variations in brightness, chroma and hue are significantly influenced by the interaction between the whitening agent and the original colour of the teeth. Laser-activation has marginally improved the bleaching effectiveness. All patients treated with laser activation complained an increase in dental sensitivity.Conclusion:The use of laser-activating systems did not improve the efficacy of bleaching.

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Section: Discussionmentioning

confidence: 99%

Clinical and Spectrophotometric Evaluation of LED and Laser Activated Teeth Bleaching

Giudice¹,

Pantaleo²,

Lizio³

et al. 2016

TODENTJ

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“…The peculiar features of the used HP AFM, such as a z scanner independent of ( x , y ) ones and its large room for sample placement in z (height of up to 5 cm) made the placement of a complete root canal instrument without sectioning and scanning of the same points preoperatively and postoperatively. In most previous studies, AFM in contact mode was used to evaluate the surface topography of root canal instruments (Inan et al, ; Spagnuolo et al, ; Valois et al, ), whereas here, the dynamic mode (tapping) of HpAFM was used. This mode prevents damaging the surface and the scanning tip.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, a single scanning area was used in previous studies (1 × 1, 5 × 5, 15 × 15, or 20 × 20 µm 2 ) (Saglam et al, ; Spagnuolo et al, ; Topuz et al, ; Valois et al, ; Yamazaki‐Arasaki et al, ), and the effect of scanning area was not evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…Rotary motion involves full‐cycle (360°) rotation in one direction; reciprocating motion involves oscillation; i.e., the instrument rotates in one direction and then reverses direction before completing a full rotary cycle (Wan et al, ). Protaper (Dentsply Maillefer, Ballaigues, Switzerland) is a popular rotary NiTi system; its surface topography under different conditions was evaluated using AFM (Ametrano et al, ; Inan et al, ; Saglam et al, ; Spagnuolo et al, ; Yamazaki‐Arasaki et al, ). The surface topography of file systems using reciprocating motion has not been evaluated yet.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of surface topography changes in three NiTi file systems using rotary and reciprocal motion: An atomic force microscopy study

Yalpı

Uzun

2013

Microsc. Res. Tech.

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“…The AFM was found to be an excellent tool to determine numeric values that describe the surface roughness, even if it presents some drawbacks, such as small scan size. 9,18,19 Therefore, the SEM was used for qualitative evaluation of the surface at a micrometer scale.…”

Section: Discussionmentioning

confidence: 99%

Effects of intraoral aging on surface properties of coated nickel-titanium archwires

Rongo

Ametrano

Gloria

et al. 2014

The Angle Orthodontist

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Objective: To evaluate the effects of intraoral aging on surface properties of esthetic and conventional nickel-titanium (NiTi) archwires. Materials and Methods: Five NiTi wires were considered for this study (Sentalloy, Sentalloy High Aesthetic, Superelastic Titanium Memory Wire, Esthetic Superelastic Titanium Memory Wire, and EverWhite). For each type of wire, four samples were analyzed as received and after 1 month of clinical use by an atomic force microscope (AFM) and a scanning electronic microscope (SEM). To evaluate sliding resistance, two stainless steel plates with three metallic or three monocrystalline brackets, bonded in passive configuration, were manufactured; four as-received and retrieved samples for every wire were pulled five times at 5 mm/min for 1 minute by means of an Instron 5566, recording the greatest friction value (N). Data were analyzed by one-way analysis of variance and by Student's t-test. Results: After clinical use, surface roughness increased considerably. The SEM images showed homogeneity for the as-received control wires; however, after clinical use esthetic wires exhibited a heterogeneous surface with craters and bumps. The lowest levels of friction were observed with the as-received Superelastic Titanium Memory Wire on metallic brackets. When tested on ceramic brackets, all the wires exhibited an increase in friction (t-test; P , .05). Furthermore, all the wires, except Sentalloy, showed a statistically significant increase in friction between the as-received and retrieved groups (t-test; P , .05). Conclusion: Clinical use of the orthodontic wires increases their surface roughness and the level of friction. (Angle Orthod. 2014;84:665-672.)

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Effect of autoclaving on the surfaces of TiN‐coated and conventional nickel–titanium rotary instruments

Abstract: Multiple autoclave sterilization cycles modified the surface topography and chemical composition of conventional and TiN -coated NiTi rotary instruments.

Cited by 46 publications

References 43 publications

Clinical and Spectrophotometric Evaluation of LED and Laser Activated Teeth Bleaching

Clinical and Spectrophotometric Evaluation of LED and Laser Activated Teeth Bleaching

Evaluation of surface topography changes in three NiTi file systems using rotary and reciprocal motion: An atomic force microscopy study

Effects of intraoral aging on surface properties of coated nickel-titanium archwires

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