
To compare the clinical and radiographic conditions and the expression of pro‐inflammatory cytokines in peri‐implant crevicular fluid (PICF) at two‐piece/bone level (TP/BL) versus one‐piece/tissue level (OP/TL) single implants with a laser‐microgrooved collar after at least 5 years of loading. Although after 5 years of loading single TP/BL and OP/TL implants with a laser‐microgrooved collar surface presented similar good clinical conditions, a higher proinflammatory state and higher crestal bone loss were detected for TP/BL implants.
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