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385944 occurrences (No.46 in the rank) during 5 years in the PubMed. [cache]
335) The control group displayed significantly lower microleakage but higher unfilled area proportions than the Er:YAG laser + self-etch adhesive group and displayed significantly higher unfilled margin and unfilled area proportions than the air-abrasion + self-etch adhesive group.
* Evaluation of different types of enamel conditioning before application of a fissure sealant.
- The aim of the study was to compare fissure sealant quality after mechanical conditioning of erbium-doped yttrium aluminium garnet (Er:YAG) laser or air abrasion prior to chemical conditioning of phosphoric acid etching or of a self-etch adhesive. Twenty-five permanent molars were initially divided into three groups: control group (n = 5), phosphoric acid etching; test group 1 (n = 10), air abrasion; and test group 2, (n = 10) Er:YAG laser. After mechanical conditioning, the test group teeth were sectioned buccolingually and the occlusal surface of one half tooth (equal to one sample) was acid etched, while a self-etch adhesive was applied on the other half. The fissure system of each sample was sealed, thermo-cycled and immersed in 5% methylene dye for 24 h. Each sample was sectioned buccolingually, and one slice was analysed microscopically. Using specialized software microleakage, unfilled margin, sealant failure and unfilled area proportions were calculated. A nonparametric ANOVA model was applied to compare the Er:YAG treatment with that of air abrasion and the self-etch adhesive with phosphoric acid (α = 0.05). Test groups were compared to the control group using Wilcoxon rank sum tests (α = 0.05). The control group displayed significantly lower microleakage but higher unfilled area proportions than the Er:YAG laser + self-etch adhesive group and displayed significantly higher unfilled margin and unfilled area proportions than the air-abrasion + self-etch adhesive group. There was no statistically significant difference in the quality of sealants applied in fissures treated with either Er:YAG laser or air abrasion prior to phosphoric acid etching, nor in the quality of sealants applied in fissures treated with either self-etch adhesive or phosphoric acid following Er:YAG or air-abrasion treatment.
=>一団にする, 集める, 分派, 集団, グループ, 分類する, 演奏家グループ, 集まる, 分ける
Overview of noun group
The noun group has 3 senses (first 2 from tagged texts)
1. (1345) group, grouping -- (any number of entities (members) considered as a unit)
2. (1) group, radical, chemical group -- ((chemistry) two or more atoms bound together as a single
unit and forming part of a molecule)
3. group, mathematical group -- (a set that is closed, associative, has an identity element and
every element has an inverse)
Overview of verb group
The verb group has 2 senses (first 2 from tagged texts)
1. (4) group -- (arrange into a group or groups; "Can you group these shapes together?")
2. (1) group, aggroup -- (form a group or group together)
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