scholarly journals Insights into the kinetics of thermally induced crystallization of amorphous calcium phosphate

2018 ◽  
Vol 20 (46) ◽  
pp. 29221-29235 ◽  
Author(s):  
Vuk Uskoković ◽  
Smilja Marković ◽  
Ljiljana Veselinović ◽  
Srečo Škapin ◽  
Nenad Ignjatović ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bone Metabolism ◽  
Bone Remodeling ◽  
Amorphous Calcium Phosphate ◽  
Thermally Induced ◽  
P Transformations ◽  
Kinetics Of ◽  
Induced Crystallization

Transformations between amorphous and crystalline apatite mechanistically govern some of the most essential processes in bone metabolism, including biomineralization and bone remodeling.

The influence of Fe3+ doping on thermally induced crystallization and phase evolution of amorphous calcium phosphate

CrystEngComm ◽  
2021 ◽  
Author(s):  
Diana Griesiute ◽  
Lauryna Sinusaite ◽  
Agne Kizalaite ◽  
Andris Antuzevics ◽  
Kestutis Mazeika ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Phase Evolution ◽  
Thermally Induced ◽  
Induced Crystallization

The present study investigates thermally induced crystallization and phase evolution of amorphous calcium phosphate (ACP) partially substituted with Fe3+ ions (M/P = 1.5 : 1). It was demonstrated that the...

Thermally induced crystallization and phase evolution in powders derived from amorphous calcium phosphate precipitates with a Ca/P ratio of 1:1

2016 ◽  
Vol 450 ◽  
pp. 190-196 ◽  
Author(s):  
Zoltan Zyman ◽  
Matthias Epple ◽  
Anton Goncharenko ◽  
Dmytro Rokhmistrov ◽  
Oleg Prymak ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Phase Evolution ◽  
Thermally Induced ◽  
Induced Crystallization

scholarly journals The effects of dietary acid stress on bone metabolism in young ovariectomized and intact rats

1986 ◽  
Vol 55 (1) ◽  
pp. 79-86 ◽  
Author(s):  
M. E. kunkel ◽  
Z. K. Roughead ◽  
E. A. Nichter ◽  
J. M. Navia
Keyword(s):  
Calcium Phosphate ◽  
Bone Metabolism ◽  
Ammonium Chloride ◽  
Amorphous Calcium Phosphate ◽  
Acid Stress ◽  
Sprague Dawley ◽  
Dietary Acid ◽  
Phosphate Salts ◽  
Feeding Diets ◽  
Intact Rats

1. Two studies were performed to determine the effects of acid stress and ovariectomy on bone metabolism in young rats. In Expt 1, eighteen female weanling Sprague-Dawley-descended rats were ovariectomized, placed in one of three dietary groups and given a diet containing (g/kg): 6 calcium and 3, 6 or 12 phosphorus for 10 weeks. In Expt 2, thirty-two female weanling Sprague-Dawley-descended rats were ovariectomized, and thirty-two were left intact. Eight rats from each group were given a diet containing (g/kg): 6 Ca and 3 P, 12 P, 3 P+1 S or 3 P+20 ammonium chloride for 10 weeks.2. Feeding diets containing 12 g P/kg resulted in decreased serum Ca and increased urinary P with no changes in femur composition. Feeding high-sulphate and ammonium chloride diets resulted in increased urinary Ca and, when combined with ovariectomy, lower femur Ca and P with no changes in femur hydroxyproline or hexosamines.3. The findings reflect the more rapid turnover of the amorphous calcium phosphate salts found in greater amounts in bones of younger animals than for more stable apatitic crystals that predominate in bones of older animals.

Development of Ultra-Thin Opaque White Hydroxyapatite Sheet for Restoration of Enamel and Aesthetic Treatments of Teeth

2017 ◽  
Vol 758 ◽  
pp. 162-165
Author(s):  
Nobuhiro Kato ◽  
Yuki Ido ◽  
Ei Yamamoto ◽  
Shigeki Hontsu
Keyword(s):  
Calcium Phosphate ◽  
Pulsed Laser Deposition ◽  
Amorphous Calcium Phosphate ◽  
Pulsed Laser ◽  
Annealing Process ◽  
Laser Deposition ◽  
Japanese People ◽  
Lower Range ◽  
Post Annealing ◽  
Induced Crystallization

In cosmetic dentistry, bleaching and laminate veneer methods are common treatments to improve the appearance of teeth. However, there are limitations to these treatments, as they damage the enamel which are not capable of recovering naturally. In this study, novel hydroxyapatite (HAp) sheets, which enable both enamel restoration and aesthetic treatments, were developed. Results indicated that the lower range of the sintering temperatures, of the pulsed laser deposition targets, produced lighter shades of amorphous Calcium phosphate (ACP) sheets. Subsequently, the post-annealing process of the sheets induced crystallization processes of the ACP sheets, to form HAp sheets, and improved the shade rank of the sheet. The shade rank of the developed sheet (6.8 ± 0.2) was almost comparable to the average shade rank of the teeth of Japanese people, within a range of 6.5 to 7.0.

Alkali Counterions Impact Crystallization Kinetics of Apatite Nanocrystals from Amorphous Calcium Phosphate in Water at High pH

2018 ◽  
Vol 18 (11) ◽  
pp. 6723-6728 ◽  
Author(s):  
Casper Jon Steenbjerg Ibsen ◽  
Hanna Leemreize ◽  
Bjørn Fridur Mikladal ◽  
Jonas Skovgaard ◽  
Martin Bremholm ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Crystallization Kinetics ◽  
Amorphous Calcium Phosphate ◽  
High Ph ◽  
Kinetics Of

Light transmittance and polymerization kinetics of amorphous calcium phosphate composites

2016 ◽  
Vol 21 (4) ◽  
pp. 1173-1182 ◽  
Author(s):  
Matej Par ◽  
Danijela Marovic ◽  
Hrvoje Skenderovic ◽  
Ozren Gamulin ◽  
Eva Klaric ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Polymerization Kinetics ◽  
Light Transmittance ◽  
Kinetics Of

scholarly journals Reversal of Root Caries with Casein Phosphopeptide-Amorphous Calcium Phosphate and Fluoride Varnish in Xerostomia

2021 ◽  
pp. 1-10
Author(s):  
Ahmed Sleibi ◽  
Anwar R. Tappuni ◽  
Aylin Baysan
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Primary Root ◽  
Severity Index ◽  
Salivary Flow ◽  
Root Caries ◽  
Carious Lesions ◽  
Group 2 ◽  
Casein Phosphopeptide ◽  
Group 1

Different formulas of topical fluoride have been used to manage root carious lesions. This clinical trial aimed to investigate the efficacy of a dental varnish containing casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and fluoride compared with fluoride alone in reversing/arresting root caries in xerostomic patients over 1 year. A total of 80 patients (age range 45–92 years) with primary root caries (<i>n</i> = 184 root carious lesions) and unstimulated salivary flow rate of &#x3c;0.2 mL/min were randomly allocated to receive either dental varnish containing CPP-ACP and 5% fluoride (group 1: MI varnish; GC, Japan) (<i>n</i> = 41, 83 lesions), or dental varnish with 5% fluoride alone (group 2: NUPRO White; Dentsply, USA) (<i>n</i> = 39, 101 lesions). Clinical assessments with Severity Index (SI) for root caries, DIAGNOdent measurements, and varnish application were carried out at baseline, 3, 6, and 12 months. Standard oral hygiene instructions with 1,450 ppm fluoride toothpastes were provided for both groups. After 3 months, 63.9% (<i>n</i> = 46) of root caries in group 1 became hard (SI: 0) compared with 39.3% (<i>n</i> = 35) in group 2 (<i>p</i> &#x3c; 0.01). After 6 and 12 months, the differences in SI were insignificant (group 1, <i>n</i> = 60, 83.3%) (group 2, <i>n</i> = 66, 74.2%) (<i>p</i> = 0.36), and (group 1, <i>n</i> = 60, 89.6%) (group 2, <i>n</i> = 67, 81.7%, <i>n</i> = 1 soft, 1.2%) (<i>p</i> = 0.29), respectively. In both groups, noncavitated leathery lesions were more likely to become hard when compared to the cavitated root caries. A significant decrease in plaque index, surface roughness, lesion dimension, and DIAGNOdent readings with a significant increase in lesion distance from the gingival margin was reported in both groups (<i>p</i> &#x3c; 0.05). This study has provided evidence that fluoride dental varnish either with or without calcium and phosphate has the potential to arrest/reverse root caries, especially noncavitated lesions for patients with xerostomia.

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