The Bone Screw An industrious implant

Journal of Clinical Orthopaedics | Vol 8 | Issue 2 |  Jul-Dec 2023 | page: 35-40 | Anand Thakur


Authors: Anand Thakur [1]

[1] Formerly Hon. Consultant orthopaedic surgeon R N Cooper Hospital & Hon Professor of orthopaedics Seth G S Medical college Mumbai, India.

Address of Correspondence
Dr. Anand Thakur,
D-1 Manusmruti 24-25 Relief Road, Santacruz west Mumbai 400054, India.


Objective: A bone screw is used for internal fixation more often any other implants. Thread of a screw is its most important part. It is akin to a long inclined plane or a wedge that gives it the power to convert an applied small torque to a large internal tensions along its axis to compress to surfaces together. Popular buttress thread has many drawbacks which are over come in a new design ‘Bone-Screw-Fastener’. It is also superior to conventional locking screw as it offers comparable stability and also generates compression at plate bone interface. Lagging is a technique that can be applied to virtually all types of screws to produce compression across the bone surfaces; exact technique and positioning of the screw in the center of the fracture fragment and at right angles to the fracture plane is mandatory for optimum results. Both bolt and screw are threaded fasteners with similar functions but different in detail.
Keywords: Bone-screw-fastner, Simple machine, Screw thread, Lag screw, Bolt, bone screw.


1. Tencer AF, Johnson KD. Biomechanics in Orthopaedic Trauma: Bone Fracture and Fixation. London, UK: Martin Dunitz; 1994.
2. Albright JA, Johnson TR, Saha S. Principles of internal fixation. In: Ghista DN, Roaf R, editors. Orthopaedic Mechanics: Procedures and Devices. London, UK: Academic Press; 1978. p. 124-222.
3. Stahel PF, Alfonso NA, Henderson C, Baldini T. Introducing the “Bone-Screw-Fastener” for improved screw fixation in orthopedic surgery: A revolutionary paradigm shift? Patient Saf Surg 2017;11:6.
4. SMV Scientific, Austin, TX, USA: Osteocentric Technologies.
5. Alfonso NA, Baldini T, Stahel PF. 2019 A new fastener with improved bone-to-implant interface shows superior torque stripping resistance compared with the standard buttress screw. J Orthop Trauma 2019;33:e137-42.
6. Debaun MR, Swinford ST, Chen MJ, Thio T, Behn AA, Lucas JF, et al. Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone. Injury 2020;51:193-8.
7. Pye JL, Garcia TC, Kapatkin AS, Samol MA, Stover S. Biomechanical comparison of compact versus standard flute drill bits, and interlocking versus buttress thread self-tapping cortical bone screws in cadaveric equine third metacarpal condyle. Vet Surg 2023;52:1128-39.
8. Heim U, Pfeiffer KM, Brenwald J. Internal Fixation of Small Fractures: Technique Recommended by the AO-ASIF Group. 3rd ed. Berlin: Springer-Verlag; 1988.
9 . Bolts vs. Screws. Available from: [Last accessed on 2014 Oct 09].
10. Screw vs. Bolts – The Engineer Explains. Available from: [Last accessed on 2014 Oct 08].

How to Cite this article: Thakur A. The Bone Screw An industrious implant. Journal of Clinical Orthopaedics July-December 2023;8(2):35-40.

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