Microhardness and Ca:P ratio of carious and Carisolv treated caries-affected dentine using an ultra-micro-indentation system and energy dispersive analysis of x-rays--a pilot study.

Abstract:

BACKGROUND:This study aimed to evaluate microhardness and chemical analysis of carious and caries-affected dentine. The hypothesis tested was that calcium:phosphorous (Ca:P) ratios correlate with microhardness values. METHODS:Four carious human third molars were sectioned through the caries lesion in the mesiodistal longitudinal plane. One half of each lesion underwent carious dentine removal using Carisolv gel. The cut surfaces were polished, microhardness tested using an Ultra-Micro-Indentation System (UMIS) and elemental analysis performed using energy dispersive analysis of x-rays (EDAX). RESULTS:The microhardness of carious dentine decreased gradually towards the cavity floor, but that for caries-affected dentine showed more variation with depth, having a mean hardness of (0.63 +/- 0.18) GPa. Ca:P ratios of carious dentine varied among the four specimens. The mean Ca:P ratio of caries-affected dentine was 1:2.03 +/- 0.08. The hypothesis was accepted for active lesions. CONCLUSIONS:The use of Carisolv to excavate carious tissue can be as effective as rotary instrumentation.

journal_name

Aust Dent J

authors

Sakoolnamarka R,Burrow MF,Swain M,Tyas MJ

doi

10.1111/j.1834-7819.2005.tb00368.x

subject

Has Abstract

pub_date

2005-12-01 00:00:00

pages

246-50

issue

4

eissn

0045-0421

issn

1834-7819

journal_volume

50

pub_type

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