Findings of a Four-Year Randomized Controlled Clinical Trial Comparing Two-Piece and One-Piece Zirconia Abutments Supporting Single Prosthetic Restorations in Maxillary Anterior Region

Table 3

Follow-up 48 months	Plaque Index	Bleeding Index
One-piece restoration	0.47 ± 0.50	0.47 ± 0.50
Two-piece restoration	0.48 ± 0.51	0.24 ± 0.44
Significance	0.893	0.053