The secondary part (17) according to the invention, for securing on and/or in a dental implant, is suitable for receiving a tertiary part. The secondary part (17) comprises a secondary-part body (22) with a recess (21) on the inside, and a secondary-part screw (20) receiveable or received in the recess. The secondary part (17) has a screwing-in mechanism in the form of a contour for receiving a screwing-in tool for screwing the dental implant, connected to the secondary part (17), into a jawbone.供固定在牙植體上和/或中之根據本發明之次要零件(17)適用來收容第三零件。次要零件(17)包括:次要零件體(22),其在內側具有凹部(21);以及次要零件螺絲(20),可收容或被收容在凹部中。次要零件(17)有一螺入機構,其成為用來收容螺入工具以將連接到次要零件(17)之牙植體螺入顎骨中之輪廓形式。