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Effect of CAD/CAM abutment height and cement type on the retention of zirconia crowns

Silva, Camila Perfeito Evangelista Da

Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Faculdade de Odontologia de Bauru 2018-05-07

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  • Título:
    Effect of CAD/CAM abutment height and cement type on the retention of zirconia crowns
  • Autor: Silva, Camila Perfeito Evangelista Da
  • Orientador: Soares, Simone
  • Assuntos: Cad; Cimentos Dentários; Implantes Dentários; Abutment Design; Cad/Cam; Dental Cements; Dental Implants; Zirconia
  • Notas: Dissertação (Mestrado)
  • Descrição: Aim: To evaluate the effect of different Ti-base abutment heights and cement type on the pullout retention of zirconia-based restorations. Methods: Identical crowns were designed in a CAD software to fit two different Tibase abutment heights, as follows (n=10/group): (i) 4-mm-height Ti-base abutment (Tall), and (ii) 2.5-mm-height Ti-base abutment (Short). Four cement types were selected: (i) Temporary cement (Provisional); (ii) Glass-ionomer cement (Meron); (iii) self-adhesive resin cement (U200), and (iv) conventional resin cement (Ultimate) with universal adhesive for treatment of titanium and zirconia substrates. Pull-out testing was performed in a universal testing machine. Data were statistically evaluated through two-way analysis of variance following post-hoc comparisons by Tukey test. Results: Tall Ti-base abutments demonstrated similar retention to short abutments when data is collapsed over cement (p>0.74). Data evaluation as a function of cement type demonstrated the superiority of resin-based cements relative to provisional and glass-ionomer groups (p<0.01). Retentiveness data as a function of both factors demonstrated similar force to dislodgment between tall and short abutments for all within cement comparisons (p>0.42), except for U200 (p=0.032). Also, tall abutments cemented with Ultimate evidenced higher pull out values than U200 (p=0.043), and both were significantly more retentive than tall provisional and meron (p<0.001). No significant difference was observed between U200 and Ultimate cements for short abutments (p=0.758), and both presented statistically higher pullout values than provisional and glass-ionomer (p=0.001). Conclusions: While Ti-base abutment height have not influenced zirconia superstructure retentiveness, resin-based cements significantly evidenced higher retention than glass ionomer and temporary cements.
  • DOI: 10.11606/D.25.2018.tde-31082018-144600
  • Editor: Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Faculdade de Odontologia de Bauru
  • Data de criação/publicação: 2018-05-07
  • Formato: Adobe PDF
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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