International journal of implant dentistry
Internal fit of cobalt-chromium and zirconia implant abutments fabricated using different techniques: a micro-computed tomography study
Par Molinero-Mourelle P, Mosaddad SA, Cascos-Sanchez R et 4 autres.
Contenu en anglais
Résumé
Purpose
To evaluate the internal fit at the implant-abutment interface of zirconia and cobalt-chromium abutments fabricated using different techniques by micro-computed tomography (micro-CT).
Methods
Twenty screw-retained abutments were divided into 4 groups (n = 5): milled zirconia (ZrCAD), milled cobalt-chromium (Co-CrMill), laser-sintered cobalt-chromium (Co-CrLS), and cast cobalt-chromium (Co-CrCL). Specimens were subjected to cyclic loading (300,000 cycles, 200 N) and thermocycling (10000 cycles, 5 to 50 °C). Internal fit was assessed by micro-CT at 3 regions and 3 spatial planes (180 measurements). Data were analyzed with Kruskal-Wallis and Bonferroni-Holm tests (α = 0.05).