Response to the Letter to the Editor: Minimise damage of heat generated during drilling procedure. In-vitro assessment of bone viability with different implant drill speeds

Marzook, Hamdy; Yousef, Eman; Denewar, Mona; Farahat, M.R.L.

doi:10.1016/j.bjoms.2020.10.288

Cited by 1 publication

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Expanding rotational speeds beyond those of the present study, a recent investigation translated rotational speed variations, drill dimensions, and temperature changes to bone viability [ 53 ]. Osteotomies were prepared in rabbit femur using conical shaped drills (3-, 3.5-, and 4-mm diameters) at rotational speeds of 1000, 1500, 2000 RPM, or a combination of 2000 RPM for the first two drills (3- and 3.5-mm diameter) and 1000 RPM for the final 4 mm diameter drill with external irrigation.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature Changes during Implant Osteotomy Preparations in Fresh Human Cadaver Tibiae, Comparing Straight with Tapered Drills

et al. 2022

View full text Add to dashboard Cite

The success of osseointegration depends on many factors. With temperatures beyond a 47 °C threshold over 1 min, bone survival may be impaired. The purpose of the study was to evaluate, in fresh human cadaver tibiae, the temperature changes during osteotomy preparations using two straight and two tapered implant systems’ drills, external irrigation, and varying revolutions per minute (RPM). The tibiae from a fresh female cadaver were harvested bilaterally. Two tapered and two straight design drills were assessed. Two-hundred and forty osteotomies were prepared at 6 mm depth following the drill sequence of the manufacturers’ protocol for each drilling speed. Difference in temperature (ΔΤ) was calculated by subtracting the baseline from the maximum temperature (ΔT = Tmax − Tbase). Drill design and drill diameter, as independent variables or synergistically, had a significant effect on ΔΤ. Tapered drills: As the drill diameter increased, ΔΤ increased at all RPM. Straight drills: As the drill diameter increased, ΔΤ remained constant or slightly decreased at all RPM. Drill diameter and design had a significant effect on ΔΤ in human tibiae, which never exceeded the critical threshold of 47 °C. Tapered drills caused significantly greater heat production compared to straight drills.

show abstract

Section: Discussionmentioning

confidence: 99%

“…However, the temperature elevations did not reach the bone necrosis threshold of 47 °C. Other studies have shown differing trends with tapered drills [ 51 , 52 , 53 ]. The rotational speeds tested herein were within the range recommended by the manufacturers of the implant systems.…”

Section: Discussionmentioning

confidence: 99%