Astra Tech DRILLS

OsseoSpeed™ TX S, TX

Fig. 1

Externally cooled, latch type, single use (Fig.1, left) and multi use (Fig.1, right) drills are offered from Astra. Multi use drills are titanium nitrate plated (gold color) and may be used 15 to twenty times while single use drills are silver in color. All drills are color coded according to the drill diameter and depth markings are laser etched on the cutting portion of the drills. Four different, task specific drill designs comprise the Astra drill set.
Twist Drill

Fig. 2

Twist drills (Fig.2) from 2.0mm to 4.85mm diameter are the primary drills to achieve the desired osteotomy depth and diameter. Nine different single use and eleven multi use drills constitute each set. The average drill step increase from twist drill to twist drill after omitting the first 2mm drill is 0.356mm for single use drills and 0.285mm for multi use drills, resulting in a less time consuming but more aggressive drill sequence for single use drills. Each set is offered in two osteotomy depth versions of 8-13mm and 8-19mm. Two specialized single use drills marked at 6mm to facilitate 6mm implants are available separately.
Pilot Drill

Fig. 3

Pilot drills (Fig.3, left) are a optional step in the drill sequence, primarily used in dense bone. If the recommended twist drill sequence for a particular implant is to great of a jump (from 2mm to 3.2mm for example) in osteotomy sites with D1 bone or a thick cortical plate is present, a pilot drill may be used to pre enlarge the osteotomy. This will make it easier to insert the next large twist drill in the sequence.
Cortical Drill
Cortical drills (Fig.3, right) are recommended in dense bone types (D1) for TX S implants only. These drills are used before the last twist drill in the osteotomy diameter dependent drill sequence.
Conical Drill

Fig. 4

Conical drills (Fig.4) are used in all bone types for TX implants only to accommodate the funnel shaped top half of the implant. These drills are used before the last twist drill in the osteotomy diameter dependent drill sequence for D1 bone and the last drill in D2, 3 and 4 bone types. A 1mm wide black band on the drill serves as a indicator how deep to drill into the different bone types. The top of the band should be even with the crest of the bone for D1 and 2 bone and the bottom of the band should be just at the crest for D3 and 4 bone.