Publicação
"The effect of an addicional adhesive layer on dentin bond strength : comparison with manufacture protocol"
| Resumo: | The aesthetic requirements of today's society led to the development of a new concept of adhesive dentistry, in which manufacturers are challenged to design the simplest, user-friendly and least technique-sensitive-adhesive. Thus, a newly developed class of dental adhesives has appeared on the market the universal adhesives systems. Purpose: To evaluate the micro-tensile bond strength to dentine of a universal adhesive system (Scotchbond Universal Adhesive, 3M ESPE, St Paul, MN) in total-etch mode comparing two different approaches: as per manufacturer instructions (SBU TE D) and with the application of an additional layer of hydrophobic adhesive resin (SBU+A TE D) (Adper Scotchbond Multi-purpose, 3M ESPE, Seefeld, Germany) Materials and Methods: Six human teeth were used to obtain crown segments by exposing middle dentine and then randomly distributing them into two groups (n=6): Group 1 SBU TE D and group 2 – SBU+A TE D. Resin composite restorations were placed over the prepared dentinal surface, and then sectioned longitudinally in both ‘x’ and ‘y’ directions with a low speed diamond disk. Sticks with 1mm2 of cross sectional area were obtained and stored in distilled water for 24hours at 37ºC. The specimens were tested to assess dentin bond strength by using micro-tensile tests (μTBS) and the statistical analysis of the results was performed by independent samples t-test when the assumption of normality was valid. Results: SBU TE D showed lower μTBS mean (33,32±13,5 MPa) than SBU+A TE D (36.92±20,1 MPa). However, no statistical significant differences were found between groups (p > 0,05). Conclusions: The use of an additional hydrophobic resin layer coating does not improve dentin bond strength of a new universal adhesive when used in the total-etch strategy. |
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| Autores principais: | Andrade, Ana Soraia Pinheiro |
| Assunto: | Materiais dentários - adesivos Teses de mestrado - 2014 |
| Ano: | 2014 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | The aesthetic requirements of today's society led to the development of a new concept of adhesive dentistry, in which manufacturers are challenged to design the simplest, user-friendly and least technique-sensitive-adhesive. Thus, a newly developed class of dental adhesives has appeared on the market the universal adhesives systems. Purpose: To evaluate the micro-tensile bond strength to dentine of a universal adhesive system (Scotchbond Universal Adhesive, 3M ESPE, St Paul, MN) in total-etch mode comparing two different approaches: as per manufacturer instructions (SBU TE D) and with the application of an additional layer of hydrophobic adhesive resin (SBU+A TE D) (Adper Scotchbond Multi-purpose, 3M ESPE, Seefeld, Germany) Materials and Methods: Six human teeth were used to obtain crown segments by exposing middle dentine and then randomly distributing them into two groups (n=6): Group 1 SBU TE D and group 2 – SBU+A TE D. Resin composite restorations were placed over the prepared dentinal surface, and then sectioned longitudinally in both ‘x’ and ‘y’ directions with a low speed diamond disk. Sticks with 1mm2 of cross sectional area were obtained and stored in distilled water for 24hours at 37ºC. The specimens were tested to assess dentin bond strength by using micro-tensile tests (μTBS) and the statistical analysis of the results was performed by independent samples t-test when the assumption of normality was valid. Results: SBU TE D showed lower μTBS mean (33,32±13,5 MPa) than SBU+A TE D (36.92±20,1 MPa). However, no statistical significant differences were found between groups (p > 0,05). Conclusions: The use of an additional hydrophobic resin layer coating does not improve dentin bond strength of a new universal adhesive when used in the total-etch strategy. |
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