pH of pus collected from periapical abscesses

Nekoofar, Mohammad Hossein; Namazikhah, M. Sadegh; Sheykhrezae, M. S.; Mohammadi, Maryam; Kazemi, Ashraf; Aseeley, Zena; Dummer, P. M. H.

doi:10.1111/j.1365-2591.2009.01550.x

Cited by 67 publications

(56 citation statements)

References 36 publications

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“…A perforation repair material is invariably placed in an environment where inflammation is present and where the pH is likely to be acidic 12,13 . This acidic pH is likely to be an impediment to the setting reaction of Biodentine causing it to affect the compressive strengthof the set material.…”

Section: Discussionmentioning

confidence: 99%

Effect of pH on the compressive strength of Grey Mineral Trioxide Aggregate and Biodentine

Thomas¹,

Chandak²,

Patidar³

et al. 2014

IOSRJDMS

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Section: Discussionmentioning

confidence: 99%

Effect of pH on the compressive strength of Grey Mineral Trioxide Aggregate and Biodentine

Thomas¹,

Chandak²,

Patidar³

et al. 2014

IOSRJDMS

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“…The mean pH of pus from periapical abscesses was generally acidic, although some samples were neutral and some were alkaline [ 40 ]. It has been reported that surface hardness of MTA was reduced in an acidic environment [ 37 ] as is push-out strength [ 56 ].…”

Section: Variable Phmentioning

confidence: 98%

Reactivity and Environmental Factors

Camilleri

Dummer

2014

Mineral Trioxide Aggregate in Dentistry

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Hydrated mineral trioxide aggregate (MTA) is composed of un-hydrated cement particles, which acts as a core around which a reaction rim of hydration products is formed ( Fig. 2.5 ). When mixed with water, the tricalcium and dicalcium silicate react forming calcium silicate hydrate (honeycomb appearance) and calcium hydroxide (hexagonal plates) (Fig. 2.6 ), which is leached in solution. The presence of calcium hydroxide has been verifi ed by X-ray diffraction analysis as it produces a typical peak for portlandite at 18° 2 θ (Fig. 2.9 ), whilst the leaching of calcium has been measured by inductively coupled plasma. The particular microstructure of MTA and the presence of calcium hydroxide in solution make the material susceptible to environmental factors. The use of MTA brings it into contact with other materials, tissues and fl uids, and a number of changes occur within or on the surface of the material in various environmental conditions. Effect of Environmental Factors on the Set MaterialMTA has a variety of applications mostly in Endodontics. These various uses have been discussed [ 60 ] and are outlined in Chap. 6 . Dental Materials Glass IonomerCovering MTA with glass ionomer cement when it is used as a pulp capping agent results in physical changes to the materials at their interface ( Fig. 5.1a ). A sizable gap has been observed at the interface attributed to the movement of water out of MTA into the glass ionomer. This movement of water out of MTA can inhibit its hydration and increases its porosity [ 9 ]. There is no evidence that covering MTA with a glass ionomer has an effect on the glass ionomer cement itself with regard to setting time and setting reaction [ 5 , 36 ]. However, migration of strontium from glass ionomer to MTA has been observed [ 9 ], although its effects are unknown. Base MaterialsZinc oxide eugenol-based cements are used as temporary fi lling materials and come into contact with MTA when it is used for pulp capping. Zinc is a retarder of cement hydration [ 47 ], and zinc salts form calcium hydrozincate (Ca(Zn(OH) 3 H 2 O) 2 ), an insoluble hydroxide in alkaline solution that creates a coating on MTA particles. In addition, zinc

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“…The rod was made of orthodontic wire 0.6 mm in thickness and 3 cm in length. To simulate the level of pH in periapical lesions, which is reported to be within the range of 6.00 to 7.03 12) , boric acid was added to saline solution to achieve a pH of approximately 6.00. Each specimen was then placed in a 1.8-ml acrylic recipient containing 1 ml saline solution (pH=6.00), which was replaced after each evaluation.…”

Section: Preparation Of Medicationmentioning

confidence: 99%

Application of 17% EDTA Enhances Diffusion of 45Ca-labeled OH− and Ca2+ in Primary Tooth Root Canal

Ximenes

Taguchi

Triches³

et al. 2016

Bull. Tokyo Dent. Coll.

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Proper cleaning of the root canal is key to the success of endodontic treatment as it allows more effective diffusion of medication throughout the dentinal tubules. The aim of this in vitro study was to investigate the efficacy of 17% ethylenediaminetetraacetic acid (EDTA) in enhancing diffusion of hydroxyl (OH − ) and calcium ions (Ca 2+ ) throughout the root canal in primary teeth. The canals of 25 primary tooth roots were cleaned with endodontic files and 1% sodium hypochlorite. Three groups (G) were then established: GI, in which final irrigation was performed with 1% sodium hypochlorite; GII, in which 17% EDTA was used; and GIII, in which no irrigation was performed. The roots canals in GI and GII were filled with a calcium hydroxide-based paste labeled with the radioisotope calcium-45. Diffusion of OH − was detected with pH strips and Ca 2+ analyzed by measuring radioactivity in counts per min. Group II differed statistically from the other groups in diffusion of OH − at 24 hr (p<0.05), but no significant difference among groups was found at the day 7 evaluation; GII also differed statistically from the other groups in diffusion of Ca 2+ at 24 hr (p<0.05). These results suggest that application of 17% EDTA in primary tooth enhances diffusion of OHˉ and Ca 2+.

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pH of pus collected from periapical abscesses

Abstract: The mean pH of pus from periapical abscesses was generally acidic, but some samples (two female and three male) were neutral and some samples (four female and one male) were alkaline.

Cited by 67 publications

References 36 publications

Effect of pH on the compressive strength of Grey Mineral Trioxide Aggregate and Biodentine

Effect of pH on the compressive strength of Grey Mineral Trioxide Aggregate and Biodentine

Reactivity and Environmental Factors

Application of 17% EDTA Enhances Diffusion of <sup>45</sup>Ca-labeled OH<sup>−</sup> and Ca<sup>2+</sup> in Primary Tooth Root Canal

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pH of pus collected from periapical abscesses

Abstract: The mean pH of pus from periapical abscesses was generally acidic, but some samples (two female and three male) were neutral and some samples (four female and one male) were alkaline.

Cited by 67 publications

References 36 publications

Effect of pH on the compressive strength of Grey Mineral Trioxide Aggregate and Biodentine

Effect of pH on the compressive strength of Grey Mineral Trioxide Aggregate and Biodentine

Reactivity and Environmental Factors

Application of 17% EDTA Enhances Diffusion of <sup>45</sup>Ca-labeled OH<sup>&minus;</sup> and Ca<sup>2+</sup> in Primary Tooth Root Canal

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Product

Resources

About

Application of 17% EDTA Enhances Diffusion of <sup>45</sup>Ca-labeled OH<sup>−</sup> and Ca<sup>2+</sup> in Primary Tooth Root Canal