pH of Medicated Syrups–Does It Really Matter? – An in-vitro Study: Part-II

2008 ◽  
Vol 33 (2) ◽  
pp. 137-142 ◽  
Author(s):  
KL Girish Babu ◽  
Kavita Rai ◽  
Amitha Hegde
Keyword(s):  
Atomic Absorption ◽  
In Vitro Study ◽  
Vitro Study ◽  
Atomic Absorption Spectrometer ◽  
Alkaline Ph ◽  
Time Intervals ◽  
Neutral Ph ◽  
Absorption Spectrometer ◽  
Dissolution Potential

The aim of the present in vitro study was to quantify the endogenous erosive potential of the various pediatric liquid medicaments by measuring the calcium dissolution of primary enamel after immersing it for different time intervals (1min, 10 min and 8 hours) using atomic absorption spectrometer (AAS). The eight commonly used pediatric liquid medicaments which were selected had definitive endogenous calcium dissolution potential. All the medicaments showed calcium dissolution of primary enamel at alkaline pH and near neutral pH. The calcium dissolution potential of pediatric liquid medicaments when compared with their respective pH showed no statistically significant correlation. In conclusion, there was evidence of calcium dissolution from all the pediatric liquid medicaments.

scholarly journals A Comparative Evaluation of Six Commonly used Types of Die Materials for the Property of Abrasion Resistance, at Two Time Intervals: An in vitro Study

2013 ◽  
Vol 3 (1) ◽  
pp. 1-6
Author(s):  
Sattyam V Wankhade ◽  
Kaushal V Sanghavi ◽  
Vilas Rajguru ◽  
Jyoti Lokade
Keyword(s):  
Abrasion Resistance ◽  
Comparative Evaluation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Time Intervals ◽  
Type Iv ◽  
Die Materials ◽  
Die Material ◽  
Type V

ABSTRACT Background and objectives This in vitro study evaluated and compared the abrasion resistance of types IV and V gypsums, resin-modified type IV and type V gypsums, synthetic gypsum, and epoxy resin die material at two different time intervals spanning a period of 24 hours. Materials and methods A total of 10 dies of each die material were fabricated and tested for abrasion resistance at each time interval. An average of five readings was taken for the test, measuring the rate of abrasion of the materials. Results All the tested properties of the epoxy resin material were far superior to those of the other materials (being tested). Resin-modified type IV gypsum had significantly better abrasion resistance than its type V counterpart at setting. However, when tested at 24 hours, both materials had comparable resistance to abrasion, which was the highest among the gypsum-based materials. Interpretation and conclusion Epoxy die resin had the most superior physical properties of all. A significant decrease in the rate of abrasion (-38 to -83%) was noted, when the gypsumbased products were tested at 24 hours. From the data obtained in this study, it is recommended that when gypsum-based materials are used, to wait at least 24 hours prior to separating casts from impressions (and subsequent laboratory procedures) to avoid damage to the casts and dies. Abbreviations RR IV: Resin modified type IV gypsum; RR V: Resin modified type V gypsum; S: Synthetic gypsum; V: Type V gypsum; IV: Type IV gypsum. How to cite this article Wankhade SV, Sanghavi KV, Rajguru V, Lokade J. A Comparative Evaluation of Six Commonly used Types of Die Materials for the Property of Abrasion Resistance, at Two Time Intervals: An in vitro Study. Int J Prosthodont Restor Dent 2013;3(1):1-6.

Assessment of the Degree of Cure of the Composite Adhesive at Different Time Intervals after Initiating the Curing: An in vitro Study

2013 ◽  
Vol 47 (4_suppl3) ◽  
pp. 362-365
Author(s):  
Vaishali Vadgaonkar ◽  
Chitrang Shah ◽  
Parag Gangurde ◽  
Anita Karandikar ◽  
Girish Karandikar ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Time Intervals ◽  
Degree Of Cure

Pediatric Liquid Medicaments – Do They Erode The Teeth Surface? An In Vitro Study: Part I

2008 ◽  
Vol 32 (3) ◽  
pp. 189-194 ◽  
Author(s):  
K Girish Babu ◽  
Kavita Rai ◽  
Amitha Hedge
Keyword(s):  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Enamel Surface ◽  
Carious Lesion ◽  
Time Intervals ◽  
Irregular Pattern ◽  
Erosion Area ◽  
Erosive Effect

The present study was conducted to investigate the endogenous erosive potential of some of the most commonly used pediatric liquid medicaments in our day to day practice. Eight commonly used pediatric liquid medicaments were selected and their endogenous pH was measured using a pH electrode meter. Twenty four exfoliated or extracted primary teeth without any carious lesion/restorations, maintained in selected pediatric liquid medicaments were observed under SEM after 1 min, 10 mins and 8 hours of time intervals. The pH ranged between 6.05 (Salbutamol) to 6.77 (Paracetamol) which were acidic, whereas Theophylline had a basic pH of 7.71. The irregular pattern of pit –like erosion area were seen in all specimens, varying from site to site and probably depending on the prismatic versus aprismatic nature and composition of the affected enamel. In conclusion, all the pediatric liquid medicaments used in this study showed an erosive effect on the primary enamel surface irrespective of their pH when viewed under SEM.

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