Which of the following factors is least likely to cause failure of osseointegration?

The factor that is least likely to cause failure of osseointegration is related to patient blood pressure. While it is true that various systemic health issues can impact the success of dental implants, blood pressure alone is not as directly associated with the biological process of osseointegration.

Osseointegration is the process by which the bone integrates with the dental implant surface, providing stability and support. Factors such as implant angulation, smoking habits, and infection directly influence the success of this integration.

Implant angulation can affect how forces are distributed during function, potentially leading to increased stress on the implant and surrounding bone, which may compromise osseointegration. Smoking habits adversely affect blood flow and healing processes, leading to a higher risk of implant failure. Infection at the surgical site can directly interfere with the healing process and the stability of the bone-implant interface.

In contrast, while uncontrolled blood pressure can be a sign of systemic health issues, it does not have the same direct impact on the local conditions at the implant site that are critical for osseointegration. Therefore, when evaluating factors contributing to failure, blood pressure is generally considered less influential compared to the other options listed.