The Effect of Platform Switching on Periimplant Crevicular Fluid Content During Early Wound Healing.

PURPOSE: The objective of this study was to investigate the soft tissue response and periimplant crevicular fluid (PICF) content around platform-switched (PS) and platform-matched (PM) implants during early healing. MATERIALS AND METHODS: Nonsmokers treatment planned to receive a single implant in 2 quadrants were recruited. Two-stage implant placement protocol with 1 PM and 1 PS implant was implemented. Periimplant probing depths (PDs), modified sulcus bleeding index, and plaque indices were recorded, and PICF was collected at 1, 2, 4, and 6 weeks after abutment connection. RESULTS: PD readings were higher at week 1 than at week 6 for both groups (P = 0.0005). PD was statistically deeper in PM than in PS at week 1 (P = 0.03). There was a time-dependent decrease in total PICF volume for both groups. This decrease was statistically significant for PS (P = 0.0005), with no differences between the 2 groups at any time (P > 0.05). The decrease observed in both PM and PS for PICF interleukin 6 and macrophage inflammatory protein-1beta, and in PS for tumor necrosis factor-alpha (TNF-alpha) was statistically significant (P </= 0.03). TNF-alpha was statistically higher in PS than in PM at week 1 (P = 0.005). CONCLUSION: Within the limits of this study, it seems that periimplant soft tissue response around PM and PS implants is mostly similar during the early healing period.