Susceptibility of enamel to initial erosion in relation to tooth type, tooth surface and enamel depth

Saads Carvalho, Thiago; Lussi, Adrian (2015). Susceptibility of enamel to initial erosion in relation to tooth type, tooth surface and enamel depth. Caries research, 49(2), pp. 109-115. Karger 10.1159/000369104

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This study aimed at assessing the susceptibility of different tooth types (molar/premolar), surfaces (buccal/lingual) and enamel depths (100, 200, 400 and 600 μm) to initial erosion measured by surface microhardness loss (ΔSMH) and calcium (Ca) release. Twenty molars and 20 premolars were divided into experimental and control groups, cut into lingual/ buccal halves, and ground/polished, removing 100 μm of enamel. The initial surface microhardness (SMH 0 ) was measured on all halves. The experimental group was subjected to 3 consecutive erosive challenges (30 ml/tooth of 1% citric acid, pH 3.6, 25 ° C, 1 min). After each challenge, ΔSMH and Ca release were measured. The same teeth were consecutively ground to 200, 400 and 600 μm depths, and the experimental group underwent 3 erosive challenges at each depth. No difference was found in SMH 0 between experimental and control groups. Multivariate nonparametric ANOVA showed no significant differences between lingual and buccal surfaces in ΔSMH (p = 0.801) or Ca release (p = 0.370). ΔSMH was significantly greater in premolars than in molars (p < 0.05), but not different with respect to enamel depth. Ca release decreased significantly with increasing depth. Regression between Ca release and ΔSMH at 100 μm depth showed lower slope and r 2 value, associated with greater Ca release values. At 200-600 μm depths, moderately large r 2 values were observed (0.651-0.830). In conclusion, different teeth and enamel depths have different susceptibility to erosion, so when Ca release is used to measure erosion, the depth of the test facet in enamel should be standardized, whereas this is less important if ΔSMH is used.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > School of Dental Medicine, Restorative Dentistry, Research
04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry
04 Faculty of Medicine > School of Dental Medicine

UniBE Contributor:

Saads Carvalho, Thiago and Lussi, Adrian

Subjects:

600 Technology > 610 Medicine & health
500 Science > 570 Life sciences; biology

ISSN:

0008-6568

Publisher:

Karger

Language:

English

Submitter:

Thiago Saads Carvalho

Date Deposited:

29 Jul 2015 09:25

Last Modified:

19 Jul 2016 15:10

Publisher DOI:

10.1159/000369104

PubMed ID:

25592786

Uncontrolled Keywords:

Dental erosion, Enamel, Knoop hardness, Calcium release

BORIS DOI:

10.7892/boris.70510

URI:

https://boris.unibe.ch/id/eprint/70510

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