"Trunionitis": A cause for concern?

Aldo Toni; Massimiliano Baleani; Barbara Bordini; Susanna Stea; Federico Pilla; Alessandra Sudanese

doi:10.1053/j.sart.2013.01.007

"Trunionitis": A cause for concern?

Aldo Toni, Massimiliano Baleani, Barbara Bordini, Susanna Stea, Federico Pilla, Alessandra Sudanese

Istituti Ortopedici Rizzoli

Research output: Contribution to journal › Article › peer-review

Abstract

Large diameter heads (LDH) are connected to the stem by means of a Morse taper. An adapter sleeve may be also used to adjust the head offset intraoperatively and/or to change the bearing couple and size. This paper explains the effect of head diameter and friction coefficient on the frictional torque acting on the tapers. A greater frictional torque tends to increase the micromotion occurring with in the tapered junction. Other crucial parameters are those that determine the distance between the center of the head and the tapered junction engagement level (e.g. head offset, adapter sleeve). Caution must be paid in using LDH coupled to small tapered junction, with or without an adapter sleeve.

Original language	English
Pages (from-to)	248-250
Number of pages	3
Journal	Seminars in Arthroplasty
Volume	23
Issue number	4
DOIs	https://doi.org/10.1053/j.sart.2013.01.007
Publication status	Published - Dec 2012

Keywords

Head adapter
Large diameter head
Metal debris
Metal ion
Total hip arthroplasty

ASJC Scopus subject areas

Orthopedics and Sports Medicine
Surgery

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title = "{"}Trunionitis{"}: A cause for concern?",

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AU - Toni, Aldo

AU - Baleani, Massimiliano

AU - Bordini, Barbara

AU - Stea, Susanna

AU - Pilla, Federico

AU - Sudanese, Alessandra

PY - 2012/12

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AB - Large diameter heads (LDH) are connected to the stem by means of a Morse taper. An adapter sleeve may be also used to adjust the head offset intraoperatively and/or to change the bearing couple and size. This paper explains the effect of head diameter and friction coefficient on the frictional torque acting on the tapers. A greater frictional torque tends to increase the micromotion occurring with in the tapered junction. Other crucial parameters are those that determine the distance between the center of the head and the tapered junction engagement level (e.g. head offset, adapter sleeve). Caution must be paid in using LDH coupled to small tapered junction, with or without an adapter sleeve.

KW - Head adapter

KW - Large diameter head

KW - Metal debris

KW - Metal ion

KW - Total hip arthroplasty

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"Trunionitis": A cause for concern?

Abstract

Keywords

ASJC Scopus subject areas

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