Restoration Options
A.B. Dental Devices offers the widest range of tools and devices for oral restoration, ensuring that dental solutions can be offered to meet your patient's needs. Prosthetic accessories are suitable for all the implants with an internal hex. The abutments are available in two platforms – narrow (for implants with diameters of 3.25, 3.75 & 4.2 mm) and wide (for implants with diameters of 4.5, 5 & 6 mm). All the abutments have internal threading, which ensures that the fit will not loosen, strengthens the neck of the abutment, and allows their removal by friction. Due to the precise interface between the implant and the abutment, which are designed to withstand the pressures in the mouth, the result is a very high rate of success of the implants over the years. Prior to the restoration in two-piece implants (I2 & I5), remove the cover screw or healing cap. Complete the screwing motion with a torque wrench (T8) up to 30 Ncm. (If you choose the I6 or I7 abutments with a secondary upper screw, tighten it using up to 20 Ncm.)

When an abutment is annexed to an implant using a screw it generates internal forces: the screw is stretched under tension (force T) when the abutment is forced downwards (Force Fh) by the head of the screw, and the threading action pulls the implant upwards (Force Ft). Thus the screw causes interactive forces (Fr) between the conical ring at the bottom of the abutment and the conical crater on the upper part of the implant (Figure 1). This structure resists pure vertical forces only.

Figure 2 illustrates how the implant is supposed to react to the pressures generated by side loading of the abutment. Integrative forces F1 & F2 balance the side force F. Hence the hex on the bottom of the abutment needs to precisely match the hex hole of the implant. Any margin will cause the tightening screw to bear a heavy burden and it will either bend or be lengthened, and the abutment will become loose.

However, as some margin is required, since the hex of the abutment must slide into the hole of the implant, we offer the Perfect Fit system. The external dimension of the Perfect Fit abutment neck is slightly larger than the internal dimension of the implant's hexagonal receptacle part. Nevertheless since the hexagonal neck of the Perfect Fit abutment is gently sliced longitudinally by tiny radial spaces in its sides, the slices gently bend inward when the abutment is forced into the implant, thereby decreasing its external dimension and allowing it to enter the 'poky' hexagonal receptacle part. When the abutment is manually inserted into its place it remains steady, reserving two free hands for tightening the screw and/or anything else that may be required. A tight fit is created between the internal walls of the implant's hexagonal receptacle part and the external walls of the abutment's hexagonal neck when the affixing screw is tightened.