State of retention of a dental implant at the time of its insertion that results from the slight compression of the oseotomy walls by the implant body. Or joint held together by friction of the parts. Mode of attachment used (either by itself or in conjunction with a screw) by several implant manufacturers for approximating the abutment into the implant body. Also applies to the close adaptation of a root‐form (i.e., cylindrical) implant to its osteotomy site at the time of placement.