Comparison of two methods to measure permeability of dentin

Macorra, José C. de la; Escribano, Nadia Picazo

doi:10.1002/jbm.10310

Cited by 7 publications

(6 citation statements)

References 20 publications

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“…The stepwise shape, containing several parts with no recorded additional movement during several seconds (Fig. 8 ) also indicates that “very short” measurement periods or even discontinuous measurements may lead to incorrect results 50 . We decided not to include longer measurement periods which are sometimes reported, e.g.…”

Section: Discussionmentioning

confidence: 99%

“…To address this, we standardized the duration of the measurements to 2 min and discarded 15 s each from the beginning and the end to avoid any handling influences. The Flodec system, used frequently in the literature 49 , 50 , continuously recorded a fluid flow through the dentin slices by measuring the movement of a water-to-air interface within an internal circular glass capillary of constant diameter (according to manufacturers’ information). The pressure applied (1.4 m H 2 O = 13.8 kPa) was within the range (1.38–34.47 kPa) reported in the literature 40 , 49 .…”

Section: Discussionmentioning

confidence: 99%

“…We decided not to include longer measurement periods which are sometimes reported, e.g. 3 min 49 or even 15 min 50 , because this would not provide additional information in our system, since we included a preselection criterion in the test protocol. In the present study, dentin slices were preselected according to the quality of their permeability characteristics.…”

Section: Discussionmentioning

confidence: 99%

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In vitro effects of hydroxyapatite containing toothpastes on dentin permeability after multiple applications and ageing

Hiller

Buchalla

Grillmeier

et al. 2018

Sci Rep

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This in vitro study evaluated the effect of toothpastes with different active ingredients on dentin permeability using an extended protocol including multiple applications and several thermal ageing cycles in the presence or absence of human saliva. The Null hypothesis was that dentin permeability of a hydroxyapatite containing toothpaste (BR), a potassium nitrate (SP) and an arginine and calcium carbonate (EH) containing toothpaste were similar. Dentin permeability was measured as hydraulic conductance using a commercially available capillary flow system (Flodec, Geneva) and results were expressed as % relative to matching controls. Without saliva, the ranking (best first) of dentin permeability was BR(61%) < SP(87%) < EH(118%), with saliva EH(63%) < SP(72%) < BR(88%). Saliva increased or decreased permeability dependent upon the test material. BR reduced dentin permeability significantly more in absence of saliva, with saliva EH was superior to BR. Repeated material application decreased and thermal ageing increased dentin permeability. The different tooth pastes reduced permeability differently, the best being BR without saliva, the least EH without saliva. The newly introduced test conditions (ageing, saliva, multiple applications) influenced single results significantly, and as they better simulate the in vivo situation they should be considered to be included in further in vitro permeability testing of desensitizing preparations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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In vitro effects of hydroxyapatite containing toothpastes on dentin permeability after multiple applications and ageing

Hiller

Buchalla

Grillmeier

et al. 2018

Sci Rep

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“…4,5,22 One limitation of the method is that the etched dentin disks, when kept in deionized water for more than 1 week, partially lose their maximum permeability. Because of this, a large number of teeth must be collected (in our case, 220 teeth) to achieve the expected number of samples for a limited time of storage (n=8 per group; 56 disks).…”

Section: Discussionmentioning

confidence: 99%

Comparative In Vitro Effect of TiF4 to NaF and Potassium Oxalate on Reduction of Dentin Hydraulic Conductance

Calabria¹,

Porfirio²,

Fernandes³

et al. 2014

Operative Dentistry

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This study showed that titanium tetrafluoride (TiF 4 ) varnish and solution were less effective than sodium fluoride (NaF) varnish and potassium oxalate gel in reducing dentin hydraulic conductance. Therefore, TiF 4 might be not successful against dentin hypersensitivity (DH), whereas NaF varnish or potassium oxalate gel could benefit patients with DH. SUMMARYDentin hypersensitivity (DH) is related to an increase in dentin permeability. This study tested the effect of titanium tetrafluoride (TiF 4 ) compared with sodium fluoride (NaF) and potassium oxalate gel on reducing hydraulic conductance (Lp) from the perspective of diminishing dentin permeability. The Lp of the dentin disks (1.0 6 0.2 mm) was evaluated using Flodec. The maximum Lp values of each disk were taken after phosphoric acid etching (15 seconds) and randomly allocated to seven groups (n=8) according to the treatments. The minimum (smear layer) and the maximum (after acid etching) Lp values were recorded. Treatments were performed for 4 minutes as follows: 1) NaF varnish 2) and solution (2.45% F, pH 5.0), 3) TiF 4 varnish and 4) solution (2.45% F, pH 1.0), 5) 3% potassium oxalate gel, 6) free fluoride varnish (placebo, pH 5.0), 7) and no treatment (control). The Lp after each treatment was assessed. Samples were exposed to an erosive challenge (6% citric acid, pH 2.1, 1 minute), and the final Lp was recorded. The data were statistically analyzed using repeat-

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“…와동형성이나 충전과 같은 수복행위나 상아질과민증과 관 련하여 상아세관액의 미세이동을 정량적으로 측정하려는 노 력으로는, Brännstorm 등 4,6,7,9) 이 치근에 모세관을 연결하 여 상아질의 수분투과도를 측정하였고, 최근에는 발전된 전 자-기계공학 서보기술을 이용하여 거의 실시간으로 상아질 을 통한 수분이동을 측정할 수 있게 되었다. 이중 대표적인 장치는 Flodec (De Marco Engineering, Geneva, Switzerland)이란 측정장치로서 많은 연구자들이 이를 이 용하여 상아질의 수분투과도 10,11) , 치아과민증 치료제나 상 아질접착제의 상아세관 밀폐효과 [12][13][14][15] , 복합레진 수복과정이 상아세관액의 이동에 미치는 영향 [16][17][18] , 근관충전재의 밀폐 효과 19 . 둘 째, 치수의 정수압은 30 mmHg 정도가 되는 것으로 알려 져 있다 3,5,7,16) .…”

Section: ⅰ 서 론unclassified

Development of nano-fluid movement measuring device and its application to hydrodynamic analysis of dentinal fluid

Lee

Kim

et al. 2008

J Korean Acad Conserv Dent

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This study was aimed to develop an instrument for real-time measurement of fluid conductance and to investigate the hydrodynamics of dentinal fluid. The instrument consisted of three parts; (1) a glass capillary and a photo sensor for detection of fluid movement, (2) a servo-motor, a lead screw and a ball nut for tracking of fluid movement, (3) a rotary encoder and software for data processing.To observe the blocking effect of dentinal fluid movement, oxalate gel and self-etch adhesive agent were used. BisBlock (Bisco) and Clearfil SE Bond (Kuraray) were applied to the occlusal dentin surface of extracted human teeth. Using this new device, the fluid movement was measured and compared between before and after each agent was applied.The instrument was able to measure dentinal fluid movement with a high resolution (0.196 nL) and the flow occurred with a rate of 0.84 to 15.2 nL/s before treatment. After BisBlock or Clearfil SE Bond was used, the fluid movement was decreased by 39.8 to 89.6%. [J Kor Acad Cons Dent 33(2):141-147, 2008]

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Comparison of two methods to measure permeability of dentin

Cited by 7 publications

References 20 publications

In vitro effects of hydroxyapatite containing toothpastes on dentin permeability after multiple applications and ageing

In vitro effects of hydroxyapatite containing toothpastes on dentin permeability after multiple applications and ageing

Comparative In Vitro Effect of TiF4 to NaF and Potassium Oxalate on Reduction of Dentin Hydraulic Conductance

Development of nano-fluid movement measuring device and its application to hydrodynamic analysis of dentinal fluid

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