Analysis of Temperature Rise and the Use of Coolants in the Dissipation of Ultrasonic Heat Buildup During Post Removal

Davis, Stephen H.; Gluskin, Alan H.; Livingood, Philip M.; Chambers, David W.

doi:10.1016/j.joen.2010.08.027

Cited by 15 publications

(13 citation statements)

References 13 publications

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“…Others, instrumenting endodontic posts in natural teeth [32,33], also saw a ‘lag’ period with a rise in temperature after cessation that lasted up to 9 s post-instrumentation. They left it unexplained.…”

Section: Discussionmentioning

confidence: 99%

Temperature rise during removal of fractured components out of the implant body: an in vitro study comparing two ultrasonic devices and five implant types

2015

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BackgroundUltrasonic instrumentation under magnification may facilitate mobilization of screw remnants but may induce heat trauma to surrounding bone. An increase of 5°C is considered detrimental to osseointegration. The objective of this investigation was to examine the rise in temperature of the outer implant body after 30 s of ultrasonic instrumentation to the inner part, in relation to implant type, type of ultrasonic equipment, and the use of coolants in vitro.MethodsTwo ultrasonic devices (Satelec Suprasson T Max and Electro Medical Systems (EMS) miniMaster) were used on five different implant types that were provided with a thermo couple (Astra 3.5 mm, bone level Regular CrossFit (RC) 4.1 mm, bone level Narrow CrossFit (NC) 3.3 mm, Straumann tissue level regular body regular neck 3.3 mm, and Straumann tissue level wide body regular neck 4.8 mm), either with or without cooling during 30 s. Temperature rise at this point in time is the primary outcome measure. In addition, the mean maximum rise in temperature (all implants combined) was assessed and statistically compared among devices, implant systems, and cooling mode (independent t-tests, ANOVA, and post hoc analysis).ResultsThe Satelec device without cooling induces the highest temperature change of up to 13°C, particularly in both bone level implants (p < 0.05) but appears safe for approximately 10 s of continuous instrumentation, after which a cooling down period is rational. Cooling is effective for both devices. However, when the Satelec device is used with coolant for a longer period of time, a rise in temperature must be anticipated after cessation of instrumentation, and post-operational cooling is advised.ConclusionsThe in vitro setup used in this experiment implies that care should be taken when translating the observations to clinical recommendations, but it is carefully suggested that the EMS device causes limited rise in temperature, even without coolant.

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Section: Discussionmentioning

confidence: 99%

Temperature rise during removal of fractured components out of the implant body: an in vitro study comparing two ultrasonic devices and five implant types

2015

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“…Thermal imaging has been used to show that piezoelectric ultrasonic devices, as well as magnetostrictive ultrasonic units, produce heat when in contact with tooth structure or dental materials due to friction . Ultrasonic vibration of a metal post under dry conditions can produce significant heat transfer to surrounding tooth structures in as little as 20 s; it is advised to intermittently cool the post with water or air . The general heating effect can be minimized by using low and medium power settings, and also light contact, but water should be used to cool the tooth structure (or the air‐flow function in newer ultrasonic models), depending on the procedure .…”

Section: Biophysical Effects Of Ultrasoundmentioning

confidence: 99%

“…Again, the resultant temperature rise is a multifactorial process depending upon root canal wall thickness (according to certain studies), tip design, power setting, and time of use . Intermittent use of the ultrasonic, with copious air or water coolant, has been shown to be effective in reducing the potential for serious heat‐related injury to the periodontal tissues .…”

Section: Current Endodontic Ultrasonic Tips and Attachmentsmentioning

confidence: 99%

“…It is well known that a temperature increase to 47°C for 1 min can cause bone necrosis . It has been shown that as little as 15–20 s of continuous dry ultrasonic instrumentation can contribute to injurious heat trauma, especially when high power settings are used . The thickness or thinness of dentin around a post has been shown to have no significant effect on the increase in temperature .…”

Section: Re‐treatment and Obstruction Removalmentioning

confidence: 99%

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Ultrasonics in endodontics

Park¹

2013

Endodontic Topics

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The power of ultrasonic vibrations has been harnessed in the field of dentistry—evolving in its use and purpose—for just over 60 years. The first section of this review describes the evolution and various applications of ultrasound in dentistry, and examines in detail the ultrasonic tools that have been developed for endodontic purposes. The second section of this review describes the use of ultrasonics during specific endodontic procedures, from access to obturation, incorporating as much as possible the most recent and relevant research available to date.

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“…In addition, heat transfer in a tooth can be affected by factors such as the geometry of tooth components, thickness of enamel and dentin, type of restorative materials, blood perfusion and pulp circulation. 1 - 5 …”

Section: Introductionmentioning

confidence: 99%