True or False: The 3 mm threadform is effective when immediately loaded.

• A. True
• B. False
• C. Conditional
• D. Not applicable

Answer: (A)

The 3 mm threadform is indeed effective when immediately loaded due to its design characteristics that enhance stability and retention in the bone. This threadform is specifically engineered to provide optimal contact with the surrounding bone, which improves primary stability. The increased surface area and the depth of the threads allow for better engagement with the bone, which is crucial during the initial healing phase, especially when immediate loading is applied.

Immediate loading refers to the practice of placing a prosthetic restoration on an implant right after the implant placement. In cases where the implant demonstrates high stability, using a 3 mm threadform can facilitate this process because it lessens the risk of micromovement that may lead to implant failure. Thus, using this type of threadform under the right conditions supports successful osseointegration and long-term success of the implant.

Other choices may suggest that the threadform is not immediately effective or that it operates under specific conditions. However, the characteristics of the 3 mm threadform, when properly utilized, support its effectiveness with immediate loading without needing additional constraints or conditions to be met.