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The mechanical fixation of a cementless conical cup in cortical versus cancellous trapezial bone: an experimental study

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The mechanical fixation of a cementless conical cup in cortical versus cancellous trapezial bone : an experimental study. / Thillemann, Janni K.; Dremstrup, Lene; Hansen, Torben B.; Stilling, Maiken.

In: Journal of Hand Surgery: European Volume, Vol. 46, No. 2, 02.2021, p. 146-153 .

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@article{450061f58afa45d4a75ebaa7eb32d7a9,
title = "The mechanical fixation of a cementless conical cup in cortical versus cancellous trapezial bone: an experimental study",
abstract = "In a pig bone model mimicking the human trapezium, we assessed the cementless fixation of trapezial cups in cancellous and cortical bone. Thirty-two saddle-shaped pig forefoot bones were prepared for cup fixation. Conical Konos cups (Beznoska, Kladno, Czech Republic) size 9 mm or 10 mm diameter were impacted. Cup migration was evaluated with repeated radiostereometry after intervals of cyclic-load tests. Migration increased for every load-interval up to 750 N and was higher with cancellous bone fixation than with cortical bone fixation. In cancellous bone, 9 mm cups migrated more than 10 mm cups. At the highest load (1050 N), the cumulative implant survival was 88% for 10 mm cups with cortical bone fixation and 13% for 9 mm cups with cancellous bone fixation. We conclude that mechanical fixation of conical Konos cups was better in cortical than in cancellous bone. Our results further suggest that the largest possible cup diameter should be used.",
keywords = "osteoarthritis, primary cup fixation, radiostereometry, Trapeziometacarpal arthroplasty",
author = "Thillemann, {Janni K.} and Lene Dremstrup and Hansen, {Torben B.} and Maiken Stilling",
year = "2021",
month = feb,
doi = "10.1177/1753193420963255",
language = "English",
volume = "46",
pages = "146--153 ",
journal = "Journal of Hand Surgery (European Volume)",
issn = "1753-1934",
publisher = "SAGE Publications Ltd",
number = "2",

}

RIS

TY - JOUR

T1 - The mechanical fixation of a cementless conical cup in cortical versus cancellous trapezial bone

T2 - an experimental study

AU - Thillemann, Janni K.

AU - Dremstrup, Lene

AU - Hansen, Torben B.

AU - Stilling, Maiken

PY - 2021/2

Y1 - 2021/2

N2 - In a pig bone model mimicking the human trapezium, we assessed the cementless fixation of trapezial cups in cancellous and cortical bone. Thirty-two saddle-shaped pig forefoot bones were prepared for cup fixation. Conical Konos cups (Beznoska, Kladno, Czech Republic) size 9 mm or 10 mm diameter were impacted. Cup migration was evaluated with repeated radiostereometry after intervals of cyclic-load tests. Migration increased for every load-interval up to 750 N and was higher with cancellous bone fixation than with cortical bone fixation. In cancellous bone, 9 mm cups migrated more than 10 mm cups. At the highest load (1050 N), the cumulative implant survival was 88% for 10 mm cups with cortical bone fixation and 13% for 9 mm cups with cancellous bone fixation. We conclude that mechanical fixation of conical Konos cups was better in cortical than in cancellous bone. Our results further suggest that the largest possible cup diameter should be used.

AB - In a pig bone model mimicking the human trapezium, we assessed the cementless fixation of trapezial cups in cancellous and cortical bone. Thirty-two saddle-shaped pig forefoot bones were prepared for cup fixation. Conical Konos cups (Beznoska, Kladno, Czech Republic) size 9 mm or 10 mm diameter were impacted. Cup migration was evaluated with repeated radiostereometry after intervals of cyclic-load tests. Migration increased for every load-interval up to 750 N and was higher with cancellous bone fixation than with cortical bone fixation. In cancellous bone, 9 mm cups migrated more than 10 mm cups. At the highest load (1050 N), the cumulative implant survival was 88% for 10 mm cups with cortical bone fixation and 13% for 9 mm cups with cancellous bone fixation. We conclude that mechanical fixation of conical Konos cups was better in cortical than in cancellous bone. Our results further suggest that the largest possible cup diameter should be used.

KW - osteoarthritis

KW - primary cup fixation

KW - radiostereometry

KW - Trapeziometacarpal arthroplasty

UR - http://www.scopus.com/inward/record.url?scp=85093834600&partnerID=8YFLogxK

U2 - 10.1177/1753193420963255

DO - 10.1177/1753193420963255

M3 - Journal article

C2 - 33079604

AN - SCOPUS:85093834600

VL - 46

SP - 146

EP - 153

JO - Journal of Hand Surgery (European Volume)

JF - Journal of Hand Surgery (European Volume)

SN - 1753-1934

IS - 2

ER -