Effect of drill speed on bone damage during drilling

The boné drilling is a common surgical procedure in clinicai intei-ventions including the dentistry. Although not a novelty in medicine, the penetration of a sharp tool in the boné tissue continues to be a clinicai and surgical challenge, as many pertinent questions still remain without solutions. Mechanical damage to the boné tissue is one of the common complication associafed with the drilling process [l]. An excessive force generated by a cutting tool can lead to the formation of microcracks and fractures, and even cause permanent damage in the boné tissue that, in tum, can delay postoperative recovery [2]. The main goal of this paper is to investigate the effect of drill speed on mechanical damage during drilling of solid rigid foam materiais, with similar mechanical properties to the human boné. Experimental tests were performed on biomechanical blocks instrumented with strain gauges in different surface positions during the drilling process. Finite element (FE) simulations were performed to simulate the drilling process and validated with experimental results.

Fossil fuels : pace and focus of the Clean Coal Technology Program need to be assessed : report to the Honorable Philip R. Sharp, Chairman, Subcommittee on Energy and Power, Committee on Energy and Commerce, House of Representatives /

"B-230504"--P. [1].

Shock tube studies of the effects of sharp-rising, long-duration overpressures on biological systems /

Shock tubes have been used successfully by a number of investigators to study the biological effects of variations in environmental pressures (1,2,3). Recently an unusually versatile laboratory pressurization source became available with the capability of consistently reproducing a wide variety of pressure-time phenomena of durations equal to and well beyond those associated with the detonation of nuclear devices (4). Thus it became possible to supplement costly full-scale field research in blast biology carried out at the Nevada Test Site (5,6) by using an economical yet realistic laboratory tool. In one exploratory study employing pressure pulses of 5 to 10 sec duration wherein the times to max overpressure and the magnitudes of the overpressures were varied, a relatively high tolerance of biological media to pressures well over 150 psi was demonstrated (7). In contrast, the present paper will describe the relatively high biological susceptibility to long duration overpressures in which the pressure rises occurred in single and double fast-rising steps.

Phantasy in F sharp minor : for piano quartet /

Duration: 12:00.

Oblique angle crash tests of loaded heavy trucks into an instrumented wall. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

A comparison of tire traction test methods: mobile tire traction dynamometer vs instrumented passenger car. Technical report.

Mode of access: Internet.

Process development for making SM-1 instrumented fuel plates by gas-pressure bonding /

"Contract No. W-7405-eng-92."

The life of John Sharp, D.D., Lord Archbishop of York, to which are added, select original, and copies of original papers, in three appendixes, collected from his diary, letters, and several other authenic testimonies,

Mode of access: Internet.

[The works of John Sharp].

Without collective title; each vol. has separate t. p.; imprint varies.

George Meredith--poeta; Fiona Macleod (William Sharp):

George Meredith, poeta.--Fiona Macleod (William Sharp)--Versioni da "Fiona Macleod": Il risveglio di Angus Ogue. Cathal, dei boschi. Là, dove la foresta mormora.

Katharine Lucinda Sharp, founder and director of the Illinois Library school, MDCCCXCIII-MCMVII ...

Mode of access: Internet.

Flood flow through reservoirs as modified by storage / A.L. Sharp and V.I. Myers.

Mode of access: Internet.