Influence of supracr estal tissue height on peri-implant hard and soft tissues of single implants placed in the esthetic area using the one abutment-one time approach: a 1-year prospective interventional study

Objective: This pilot, prospective interventional study aimed to analyze the influence of supracrestal tissue height when using the one abutment-one time concept at the time of implant placement, on peri-implant hard and soft tissue remodeling in esthetic areas. The definitive crown was placed 7 days later. Method and materials: Facial mucosal margin position, mesial and distal papilla levels, and mesial and distal marginal bone loss were assessed after 7 days (placement of the definitive crown), and 1, 2, 3, 6, and 12 months after implant placement. Patients were classified according to the supracrestal tissue height as thin (<3 mm) and thick (>= 3 mm). Results: Fifteen patients fulfilled sented a thick supracrestal tissue height and seven a thin supracrestal tissue height. After 12 months, the implant success rate was 100%. The mean recession at the facial mucosal margin position was -0.47 +/- 0.57 mm and -0.19 +/- 0.41 mm in thin and thick groups, respectively (P= .29). The mean mesial papilla level recession was -0.19 +/- 0.06 mm in the thin group and -0.01 +/- 0.07 mm in the thick group (P < .01), and the mean distal papilla level recession was -0.15 +/- 0.09 mm in the thin group and 0.00 +/- 0.15 mm in the thick group (P < .05). The mean bone loss was -0.21 +/- 0.18 mm and -0.04 +/- 0.14 mm in the thin and thick groups, respectively (P < .05). Conclusion: Singl e maxillary anterior implants with thin supracrestal tissue height (<3 mm) at the time of implant placement had greater bone loss and papillary recession than implants with a thick soft tissue height (2.3 mm), even when using the one abutment-onetime concept.