What factor is critical for determining the success of immediate implant placement?

Engagement of sufficient surrounding bone is crucial for the success of immediate implant placement. When an implant is placed immediately after tooth extraction, the stability of the implant depends significantly on the quantity and quality of the bone surrounding it. Adequate bone engagement provides primary stability, which is essential for the early healing phase. This stability allows for better integration of the implant into the bone structure, minimizing the risk of failure during the osseointegration process.

Having sufficient bone volume and density also plays a vital role in ensuring that the implant maintains its position as the surrounding tissues heal. If the bone lacks density or quantity, the implant may not achieve adequate primary stability and could be at risk for mobility or displacement, leading to complications such as implant failure or the need for revision surgery.

Other factors, such as initial inflammation or the time elapsed since extraction, can influence the overall healing process and the success of the implant placement but are secondary to the need for solid bone engagement. The quality of the final prosthesis also contributes to long-term function and aesthetics but does not impact the immediate success of the implant itself. Thus, while all factors may play a role at different stages, the immediate priority for successful placement revolves around adequate bone engagement.