Thermogenics in cavity preparation using air turbine handpieces: The relationship of heat transferred to rate of tooth structure removal

Thermal osteonecrosis and bone drilling parameters revisited

“…At very high-speed rates of 20,000-100,000 rpm operating speed may be as much as 50% below the free-running speed [8]. This 50% reduction is comparable to the 40% reduction reported by Sorenson et al for an air-turbine hand-piece [32]. Machine drill press ALG-100 that we used, maintains operating speed at the same level as the free-running speed.…”

Tooth Preparation: A Study on the Effect of Different Variables and a Comparison Between Conventional and Channeled Diamond Burs

“…The authors established that doubling the rotating speed of the bur and/or the pressure applied on the handpiece produced a 50% temperature increase in the tooth. Furthermore, Sorenson et al 9 demonstrated that the rate of tooth‐structure removal and the rate of heat transfer to the teeth are related in a parabolic form to the magnitude of the applied load. As such, the cutting loads under which the rate of heat transfer and the rate of tooth removal reach their maximum values are not the same.…”

“…On the other end, bur wear and debris accumulation decrease the overall cutting efficiency of a bur, increasing the total cutting energy and time required to remove a certain volume of the tooth. It has been demonstrated that proper water‐cooling decreases clogging of the bur, dissipates heat, and often leads to a decrease in the recorded pulpal temperature 8–14 . However, a recent survey indicates that less than 19% of North American dental schools make specific recommendations about coolant flow rates 15 .…”

Dental cutting behaviour of mica‐based and apatite‐based machinable glass‐ceramics

“…Since diamond points are now more popular for the removal of natural tooth enamel, due to their greater abrasion resistance and longer life span compared to tungsten carbide burs (Janota, 1973), the commercial regular grit diamond point was used. Schuchard & Watkins (1965) and Sorenson, Cantwell & Aplin (1964) have already performed the weight-load cutting test on the milled segment of human enamel and dentine, using a ball-bearing handpiece and tungsten carbide burs, and they investigated the relationships between applied load and cutting speed, and between applied load and cutting volume. As a result, they confirmed that up to a critical load level, increasing the apphed load resulted in a gradual decrease in cutting speed and an increase in cutting volume, and that after exceeding the critical load level (a deflection point), increasing the applied load led to a dramatic decrease in cutting speed and a ecrease in cutting volume.…”