کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3149452 1197454 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Denaturation Temperatures of Dentin Matrices. I. Effect of Demineralization and Dehydration
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی دندانپزشکی، جراحی دهان و پزشکی
پیش نمایش صفحه اول مقاله
Denaturation Temperatures of Dentin Matrices. I. Effect of Demineralization and Dehydration
چکیده انگلیسی

The denaturation temperature (Td) of dentin collagen in mineralized versus demineralized teeth was examined as a function of dentin age and the extent of dehydration. Using differential scanning calorimetry, Td of mineralized dentin was shown to be between 160°C to 186°C, depending on whether it was from young or old dentin that was hydrated or dehydrated, respectively. Demineralized dentin exhibited a Td of 65.6°C that increased with dehydration to 176°C. The presence of apatite crystallites or interpeptide bonding increased the Td of demineralized matrices. Interpeptide hydrogen bonding seems to stabilize collagen to thermal challenge. Water breaks interpeptide hydrogen bonds making collagen more susceptible to thermal denaturation. Rises in intracanal temperature are unlikely to cause extensive denaturation of mineralized root dentin walls. However, hydrated or partially dehydrated root canal walls that have been partially demineralized with chelating agents or mild acids may be susceptible to thermal denaturation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Endodontics - Volume 32, Issue 7, July 2006, Pages 638–641
نویسندگان
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