Countersink drills are made for use in cases where dense bone is encountered to ensure passive ﬁt of the implant neck into the surgical site. These drills are designed to enlarge the crestal area of the implant site in the area of dense cortical bone. The drills are used following the use of the final drill size for each implant. Three drill sizes are provided that correspond to the three OsseoLink implant diameters (Ø 3.5 mm, Ø 4.0 mm, Ø 5.0 mm).
The drills feature a non-cutting cylindrical area that helps guide the drill alignment and acts as a pilot. A distinct groove separates the cutting and non-cutting areas of the drills for surgical clarity. The cutting area matches the shape of the implant neck. All drills feature titanium nitride (TiNi) coating to optimize the surface hardness, increase lubricity, and extend drill longevity.
Countersink drills are considered site specific drills and should be used based on clinical judgment of bone density at the time of surgery. Care should be taken not to over-prepare the site as this can cause loss of initial implant stability. Slower drilling speeds (<500 rpm) are generally recommend when countersink drills are used.
OsseoLink implants are considered self- tapping implants. However, in some clinical situations, practitioners may prefer to tap dense cortical bone to ensure full and passive seating of the implant into its prepared osteotomy. The bone taps are used to prepare the implant thread proﬁle into the implant recipient bed thus ensuring pressure free seating. If tapping the site is elected, it should be performed as the last step prior to implant placement at a very low speed (<50 rpm).
Three bone taps are provided that correspond to the three OsseoLink implant diameters (Ø 3.5 mm, Ø 4.0 mm, Ø 5.0 mm). Laser markings on the tap shanks provide clear indication of depth and are identical to the depth marks of the OsseoLink implant drills (7.5 mm, 9.0 mm, 11.0 mm, 13.0 mm, 15.0 mm).
The cutting area of the bone taps are coated with titanium nitride (TiNi) for increased surface hardness, enhanced lubricity, and improved drill longevity. Bone taps are considered site speciﬁc drills and should be used based on clinical judgment of bone density at the time of surgery. Care should be taken not to over-prepare the site as this can cause loss of initial implant stability.
Bone taps should be used at extremely slow speeds in a clockwise direction (<50 rpm). Care should be taken not to overheat the bone during the tapping procedure. The bone taps are removed from the site through counter-clockwise rotation using similar speed.