Effects of irrigation temperature on heat control in vitro at different drilling depths

Abstract

This experimental in vitro study showed that more heat was generated in the superficial part of the drilling cavity than at the bottom. Therefore, external irrigation at room temperature can provide sufficient cooling during drilling. Lower temperature saline was more effective in cooling the bone, and irrigation of the site should be continued between the drilling steps.

Temperature changes during cortical bone drilling with a newly designed step drill and an internally cooled drill

“…Dental articles did not find significant difference between internal and external irrigation [19]. This is partly explained by the fact that maximal temperatures are on the most superficial part of bone due to elimination of heated bone chips exiting the drilling canal [10].…”

“…pressure applied to the drill [3], use of graduated versus one-step drilling [7,8], irrigation [9,10], equipment [11], torque and thrust forces [12]. Most could be varied, but some, such as drill diameter, depend on the biomechanics of specific bone.…”

Drilling of Bone: Practicality, Limitations and Complications Associated with Surgical Drill-Bits

“…In orthopaedic surgery external irrigation with sterile saline delivered via a syringe or other device is routinely applied during drilling, the efficacy of which has been demonstrated by several authors (Matthews and Hirsch 1972;Jacob and Berry 1976;Lavelle and Wedgwood 1980;Krause, Bradbury et al 1982;Kondo, Okada et al 2000;Camargo, Faria et al 2007;Augustin, Davila et al 2008;Sener, Dergin et al 2009). Utilising a numerical model, Lee and co-workers (Lee, Rabin et al 2011) modelled the effect of coolant applied to the shank and exposed fluted portion of the operational drill-bit, demonstrating that this application may have a significant effect on the maximum drill temperature, even in the advanced stages of drilling where the cutting face is embedded deep in the bone.…”

Factors Affecting the Success of Dental Implants

“…Therefore, care must be taken to avoid thermal bone injury during the procedure. External irrigation at room temperature can provide sufficient cooling during drilling and keep the temperature below the critical value of 47 o C. Lower temperature saline was shown to be more effective in cooling the bone, and irrigation of the site should be continued between the drilling steps www.intechopen.com (Sener et al, 2009). Other factors affect heat generation during drilling, such as the drilling speed and force.…”