Effect of different surface treatments of human occlusal sclerotic dentin on micro-tensile bond strength to resin composite core material
| Autor: | Anawat Kwansirikul, Daraporn Sae-Lee, Onauma Angwaravong, Thidarat Angwarawong |
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| Rok vydání: | 2020 |
| Předmět: |
Molar
Scanning electron microscope Surface Properties 0206 medical engineering Dentistry 02 engineering and technology Composite Resins 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine stomatognathic system Acid Etching Dental Tensile Strength Ultimate tensile strength Materials Testing Dentin medicine Humans General Dentistry Phosphoric acid Core (anatomy) business.industry Bond strength Dental Bonding 030206 dentistry 020601 biomedical engineering Resin Cements stomatognathic diseases medicine.anatomical_structure Dentinal Tubule chemistry Dentin-Bonding Agents business |
| Zdroj: | European journal of oral sciencesReferences. 128(3) |
| ISSN: | 1600-0722 |
| Popis: | The objectives of this study were to evaluate the micro-tensile bond strength (μTBS) of composite bonded to human occlusal sclerotic dentin following different surface treatments to determine the sclerotic dentin morphology. Human molars without (normal dentin; group 1) or with occlusal wear (sclerotic dentin; groups 2-5) were divided and subjected to different surface treatments, including the normal protocol for the Contax self-etch bonding system (group 1 and 2); doubled etch-prime time (group 3); pre-conditioning with 37% phosphoric acid before normal protocol (group 4); or pre-conditioning with 37% phosphoric acid before doubling the self-etching time (group 5). All teeth were restored with composite (Luxacore Z dual), sectioned into stick specimens and stored for 24 h in water before specimens were subjected to the μTBS test (n = 50 per group). The μTBS of normal dentin was not statistically significantly different from that of the sclerotic dentin groups, except for the doubled etch-prime time group which showed lower μTBS. Sclerotic dentin pre-treated with phosphoric acid resulted in less sclerotic casts and wider dentinal tubules, while doubled etch-prime time did not alter the morphology, as shown by scanning electron microscopy. In conclusion, the use of 37% phosphoric acid before applying self-etch bonding resulted in more tubule openings and a significantly higher μTBS when compared with the doubled etch-prime time group. |
| Databáze: | OpenAIRE |
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