Fully Threaded Versus Partially Threaded Intramedullary Headless Compression Screw Fixation for Proximal Third Fractures of the Proximal Phalanx: A Biomechanical Study

Bert Vanmierlo; Bruno Vandekerckhove; Leen Popleu; Bert O Eijnde; Joris Duerinckx; Jean F Goubau

doi:10.1016/j.jhsa.2025.01.006

Fully Threaded Versus Partially Threaded Intramedullary Headless Compression Screw Fixation for Proximal Third Fractures of the Proximal Phalanx: A Biomechanical Study

Bert Vanmierlo, Bruno Vandekerckhove, Leen Popleu, Bert O Eijnde, Joris Duerinckx, Jean F Goubau

Onderzoeksoutput: Article › peer review

Samenvatting

PURPOSE: The purpose of this study was to compare the maximal elastic force and deformation resistance of two commonly used headless compression screw systems, a fully threaded 2.5 mm screw and a partially threaded screw of the same dimensions, in a cadaveric model of a human transverse proximal third fracture of the proximal phalanx.

METHODS: Six fresh frozen cadavers were used, and the proximal phalanges of the index, long, and ring fingers of both hands were dissected. A proximal third transverse osteotomy was created, and screws were inserted in an antegrade direction. The three-point bending load-to-failure test measured the maximal elastic force and deformation resistance of each bone-screw construct.

RESULTS: The fully threaded screw demonstrated a maximal elastic force of 121 N and a deformation resistance of 134 N/mm. The partially threaded screw showed superior performance with a maximal elastic force of 165 N and deformation resistance of 166 N/mm. The bone-screw construct with the fully threaded screw had a mean maximal elastic force of 155.2 N compared to 101.8 N in the construct with the partially threaded screw. Deformation resistance was 145.2 N/mm for fully threaded screws and 98.6 N/mm for partially threaded screws.

CONCLUSIONS: Fully threaded intramedullary headless compression screw fixation provides superior maximal elastic force and deformation resistance compared to partially threaded intramedullary headless compression screw fixation in transverse proximal third fractures of the proximal phalanx.

CLINICAL RELEVANCE: The findings indicate that fully threaded intramedullary headless compression screw fixation may offer enhanced stability for treating proximal third fractures of the proximal phalanx, potentially leading to better patient outcomes through earlier mobilization and reduced complications compared to partially threaded screws.

Originele taal-2	English
Tijdschrift	The Journal of hand surgery
Vroegere onlinedatum	2025
DOI's	https://doi.org/10.1016/j.jhsa.2025.01.006
Status	E-pub ahead of print - 2025

Bibliografische nota

Publisher Copyright:
© 2025 American Society for Surgery of the Hand

Toegang tot document

10.1016/j.jhsa.2025.01.006

Andere bestanden en links

Link naar publicatie in Scopus

Citeer dit

@article{094a571ab38a4a51a4fb8c7bd9b6845e,

title = "Fully Threaded Versus Partially Threaded Intramedullary Headless Compression Screw Fixation for Proximal Third Fractures of the Proximal Phalanx: A Biomechanical Study",

abstract = "PURPOSE: The purpose of this study was to compare the maximal elastic force and deformation resistance of two commonly used headless compression screw systems, a fully threaded 2.5 mm screw and a partially threaded screw of the same dimensions, in a cadaveric model of a human transverse proximal third fracture of the proximal phalanx.METHODS: Six fresh frozen cadavers were used, and the proximal phalanges of the index, long, and ring fingers of both hands were dissected. A proximal third transverse osteotomy was created, and screws were inserted in an antegrade direction. The three-point bending load-to-failure test measured the maximal elastic force and deformation resistance of each bone-screw construct.RESULTS: The fully threaded screw demonstrated a maximal elastic force of 121 N and a deformation resistance of 134 N/mm. The partially threaded screw showed superior performance with a maximal elastic force of 165 N and deformation resistance of 166 N/mm. The bone-screw construct with the fully threaded screw had a mean maximal elastic force of 155.2 N compared to 101.8 N in the construct with the partially threaded screw. Deformation resistance was 145.2 N/mm for fully threaded screws and 98.6 N/mm for partially threaded screws.CONCLUSIONS: Fully threaded intramedullary headless compression screw fixation provides superior maximal elastic force and deformation resistance compared to partially threaded intramedullary headless compression screw fixation in transverse proximal third fractures of the proximal phalanx.CLINICAL RELEVANCE: The findings indicate that fully threaded intramedullary headless compression screw fixation may offer enhanced stability for treating proximal third fractures of the proximal phalanx, potentially leading to better patient outcomes through earlier mobilization and reduced complications compared to partially threaded screws.",

author = "Bert Vanmierlo and Bruno Vandekerckhove and Leen Popleu and Eijnde, {Bert O} and Joris Duerinckx and Goubau, {Jean F}",

note = "Publisher Copyright: {\textcopyright} 2025 American Society for Surgery of the Hand",

year = "2025",

doi = "10.1016/j.jhsa.2025.01.006",

language = "English",

journal = "The Journal of hand surgery ",

issn = "0363-5023",

publisher = "Elsevier",

}

TY - JOUR

T1 - Fully Threaded Versus Partially Threaded Intramedullary Headless Compression Screw Fixation for Proximal Third Fractures of the Proximal Phalanx

T2 - A Biomechanical Study

AU - Vanmierlo, Bert

AU - Vandekerckhove, Bruno

AU - Popleu, Leen

AU - Eijnde, Bert O

AU - Duerinckx, Joris

AU - Goubau, Jean F

PY - 2025

Y1 - 2025

N2 - PURPOSE: The purpose of this study was to compare the maximal elastic force and deformation resistance of two commonly used headless compression screw systems, a fully threaded 2.5 mm screw and a partially threaded screw of the same dimensions, in a cadaveric model of a human transverse proximal third fracture of the proximal phalanx.METHODS: Six fresh frozen cadavers were used, and the proximal phalanges of the index, long, and ring fingers of both hands were dissected. A proximal third transverse osteotomy was created, and screws were inserted in an antegrade direction. The three-point bending load-to-failure test measured the maximal elastic force and deformation resistance of each bone-screw construct.RESULTS: The fully threaded screw demonstrated a maximal elastic force of 121 N and a deformation resistance of 134 N/mm. The partially threaded screw showed superior performance with a maximal elastic force of 165 N and deformation resistance of 166 N/mm. The bone-screw construct with the fully threaded screw had a mean maximal elastic force of 155.2 N compared to 101.8 N in the construct with the partially threaded screw. Deformation resistance was 145.2 N/mm for fully threaded screws and 98.6 N/mm for partially threaded screws.CONCLUSIONS: Fully threaded intramedullary headless compression screw fixation provides superior maximal elastic force and deformation resistance compared to partially threaded intramedullary headless compression screw fixation in transverse proximal third fractures of the proximal phalanx.CLINICAL RELEVANCE: The findings indicate that fully threaded intramedullary headless compression screw fixation may offer enhanced stability for treating proximal third fractures of the proximal phalanx, potentially leading to better patient outcomes through earlier mobilization and reduced complications compared to partially threaded screws.

AB - PURPOSE: The purpose of this study was to compare the maximal elastic force and deformation resistance of two commonly used headless compression screw systems, a fully threaded 2.5 mm screw and a partially threaded screw of the same dimensions, in a cadaveric model of a human transverse proximal third fracture of the proximal phalanx.METHODS: Six fresh frozen cadavers were used, and the proximal phalanges of the index, long, and ring fingers of both hands were dissected. A proximal third transverse osteotomy was created, and screws were inserted in an antegrade direction. The three-point bending load-to-failure test measured the maximal elastic force and deformation resistance of each bone-screw construct.RESULTS: The fully threaded screw demonstrated a maximal elastic force of 121 N and a deformation resistance of 134 N/mm. The partially threaded screw showed superior performance with a maximal elastic force of 165 N and deformation resistance of 166 N/mm. The bone-screw construct with the fully threaded screw had a mean maximal elastic force of 155.2 N compared to 101.8 N in the construct with the partially threaded screw. Deformation resistance was 145.2 N/mm for fully threaded screws and 98.6 N/mm for partially threaded screws.CONCLUSIONS: Fully threaded intramedullary headless compression screw fixation provides superior maximal elastic force and deformation resistance compared to partially threaded intramedullary headless compression screw fixation in transverse proximal third fractures of the proximal phalanx.CLINICAL RELEVANCE: The findings indicate that fully threaded intramedullary headless compression screw fixation may offer enhanced stability for treating proximal third fractures of the proximal phalanx, potentially leading to better patient outcomes through earlier mobilization and reduced complications compared to partially threaded screws.

UR - http://www.scopus.com/inward/record.url?scp=85219509284&partnerID=8YFLogxK

U2 - 10.1016/j.jhsa.2025.01.006

DO - 10.1016/j.jhsa.2025.01.006

M3 - Article

C2 - 40029221

SN - 0363-5023

JO - The Journal of hand surgery

JF - The Journal of hand surgery

ER -