1 40 1 Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. URL Address <a href="http://doi.org/10.1097/TA.0b013e31802bf051" target="_blank" rel="noreferrer noopener">http://doi.org/10.1097/TA.0b013e31802bf051</a> Rights Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s). Pages 990-995 Issue 4 Volume 64 Search for Full-text Locate full-text within NEOMED Library's e-journal collections <p>Users with a NEOMED Library login can search for full-text journal articles at the following url: <a href="https://libraryguides.neomed.edu/home">https://libraryguides.neomed.edu/home</a></p> Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource The effect of pilot hole size on the insertion torque and pullout strength of self-tapping cortical bone screws in osteoporotic bone Publisher An entity responsible for making the resource available Journal of Trauma-Injury Infection and Critical Care Date A point or period of time associated with an event in the lifecycle of the resource 2008 2008-04 Subject The topic of the resource Surgery; osteoporosis; General & Internal Medicine; biomechanical testing; pilot; holding power; hole size; insertion torque; pullout strength; self-tapping cortical screws Creator An entity primarily responsible for making the resource Battula S; Schoenfeld A J; Sahai V; Vrabec G A; Tank J; Njus G O Description An account of the resource Background: All surgical screws can experience failure if the torsional, tensile, and flexion loads exerted on the screws are excessively high. The use of self-tapping screws (STS) results in higher insertion torques (IT) as these screws cut their own threads in the pilot hole drilled in the bone. In this study, the torque for inserting the STS into an osteoporotic bone block for different pilot hole sizes (PHS) was measured and the pullout strength (PS) for extraction of the screws was determined for different depths of insertion, 0 mm, 1 mm, and 2 mm beyond the far cortex. Methods: Seventy-two Synthes stainless steel STS (40 mm length and 3.5 mm diameter) were inserted into pilot holes of sizes 2.55 (A: 73% OD), 2.50 (B: 71.5%), 2.45 (C: 70 %), and 2.8 mm (D: 80 %). Using a digital torque screwdriver, screws were inserted to 0 mm, 1 mm or 2 mm past the far cortex. Pullout tests were conducted with an Instron materials testing system. Analysis of variance,and Student-Neuman-Keuls tests were performed to determine the effect of DOI and PHS on the loading energy, PS, and IT. Results: Results demonstrated that IT of the screws inserted into pilot holes A, B, and C were higher than those in D. It was also observed that PS and loading energy for 1 rum and 2 mm penetration past the far cortex were higher than those for 0 mm regardless of PHS. This study also found that an increase in PHS to 2.8 mm will reduce IT but will also reduce the PS relative to a PHS of 2.5 mm, the current standard for 3.5 mm screws. Conclusions: The results of previously published studies regarding the effect of pilot hole size on PS in healthy cortical bone cannot be applied to the osteoporotic environment. The findings presented in this research support using PHS no larger than 71.5% of the screw outer diameter (i.e., pilot hole size of 2.5 mm for 3.5 mm screws) and inserting screws at least 2 mm beyond the far cortex to maximize PS and minimize iatrogenic damage in osteoporotic bone. Identifier An unambiguous reference to the resource within a given context <a href="http://doi.org/10.1097/TA.0b013e31802bf051" target="_blank" rel="noreferrer noopener">10.1097/TA.0b013e31802bf051</a> Format The file format, physical medium, or dimensions of the resource Journal Article or Conference Abstract Publication 2008 Battula S biomechanical testing General & Internal Medicine holding power hole size insertion torque Journal Article or Conference Abstract Publication Journal of Trauma-Injury Infection and Critical Care Njus G O Osteoporosis pilot pullout strength Sahai V Schoenfeld A J self-tapping cortical screws Surgery Tank J Vrabec G A