Q. Explain threaded implants?

Cylindrical non-threaded implants poorly distribute compressive forces and generate shears forces that may fragment and break the bone surrounding the implant during function. To overcome these problems were the threaded implants introduced. The threaded type implant provides, at least initially, more stability than a press-fit attachment, but the implant is still vulnerable to movement and high levels of shear forces can be established between the implant and the alveolar bone during function. Consequently, it is usually necessary to rely on growth of new bone tissue and connective tissue to further stabilize the inserted position of the implant.