One abutment-one time: the negative effect of uncontrolled abutment margin depths and excess cement--a case report

It has been reported that repeated connection and disconnection of transmucosal components stimulates apical repositioning of the soft tissues and marginal bone resorption. Limiting the number of times this occurs may be beneficial. A new treatment concept called one abutment one time describes the placement of the definitive abutment at the time of surgery. This case highlights the susceptibility of excess cement residue associated with this concept and unesthetic outcome even when meticulous surgical correction is attempted.