Effect of implant neck design on primary and secondary implant stability in the posterior maxilla: A prospective randomized controlled study.

Implant neck design plays a role in implant primary stability in the posterior maxilla. Both implants show high primary stability, with significantly higher values for the round neck. However, these differences disappeared after 6 weeks of healing. While primary implant stability is partially governed by implant neck design, the role of this result is negligible for the achievement of secondary stability.