3D-Printed Patient-Specific ACL Femoral Tunnel Guide from MRI

Iain Rankin, Haroon Rehman, Mark Frame

Research output: Contribution to journalArticle

Abstract

Background:
Traditional ACL reconstruction with non-anatomic techniques can demonstrate unsatisfactory long-term outcomes with regards instability and the degenerative knee changes observed with these results. Anatomic ACL reconstruction attempts to closely reproduce the patient's individual anatomic characteristics with the aim of restoring knee kinematics, in order to improve patient short and long-term outcomes. We designed an arthroscopic, patient-specific, ACL femoral tunnel guide to aid anatomical placement of the ACL graft within the femoral tunnel.

Methods:
The guide design was based on MRI scan of the subject's uninjured contralateral knee, identifying the femoral footprint and its anatomical position relative to the borders of the femoral articular cartilage. Image processing software was used to create a 3D computer aided design which was subsequently exported to a 3D-printing service.

Results:
Transparent acrylic based photopolymer, PA220 plastic and 316L stainless steel patient-specific ACL femoral tunnel guides were created; the models produced were accurate with no statistical difference in size and positioning of the center of the ACL femoral footprint guide to MRI (p=0.344, p=0.189, p=0.233 respectively). The guides aim to provide accurate marking of the starting point of the femoral tunnel in arthroscopic ACL reconstruction.

Conclusion:
This study serves as a proof of concept for the accurate creation of 3D-printed patient-specific guides for the anatomical placement of the femoral tunnel during ACL reconstruction.
LanguageEnglish
Pages59-68
Number of pages10
JournalThe Open Orthopaedics Journal
Volume12
Early online date28 Feb 2018
DOIs
StatePublished - 2018

Fingerprint

Thigh
Knee
Computer-Aided Design
Stainless Steel
Articular Cartilage
Biomechanical Phenomena
Plastics
Software
Magnetic Resonance Imaging
Transplants

Keywords

  • Anterior Cruciate Ligament
  • ACL
  • Anatomic
  • Anterior Cruciate Ligament reconstruction
  • Printing
  • Three-dimensional
  • Arthroscopy

Cite this

3D-Printed Patient-Specific ACL Femoral Tunnel Guide from MRI. / Rankin, Iain; Rehman, Haroon; Frame, Mark.

In: The Open Orthopaedics Journal , Vol. 12, 2018, p. 59-68.

Research output: Contribution to journalArticle

@article{1bc39031fb7144fda75c8f76d97c7dfa,
title = "3D-Printed Patient-Specific ACL Femoral Tunnel Guide from MRI",
abstract = "Background:Traditional ACL reconstruction with non-anatomic techniques can demonstrate unsatisfactory long-term outcomes with regards instability and the degenerative knee changes observed with these results. Anatomic ACL reconstruction attempts to closely reproduce the patient's individual anatomic characteristics with the aim of restoring knee kinematics, in order to improve patient short and long-term outcomes. We designed an arthroscopic, patient-specific, ACL femoral tunnel guide to aid anatomical placement of the ACL graft within the femoral tunnel.Methods:The guide design was based on MRI scan of the subject's uninjured contralateral knee, identifying the femoral footprint and its anatomical position relative to the borders of the femoral articular cartilage. Image processing software was used to create a 3D computer aided design which was subsequently exported to a 3D-printing service.Results:Transparent acrylic based photopolymer, PA220 plastic and 316L stainless steel patient-specific ACL femoral tunnel guides were created; the models produced were accurate with no statistical difference in size and positioning of the center of the ACL femoral footprint guide to MRI (p=0.344, p=0.189, p=0.233 respectively). The guides aim to provide accurate marking of the starting point of the femoral tunnel in arthroscopic ACL reconstruction.Conclusion:This study serves as a proof of concept for the accurate creation of 3D-printed patient-specific guides for the anatomical placement of the femoral tunnel during ACL reconstruction.",
keywords = "Anterior Cruciate Ligament, ACL, Anatomic, Anterior Cruciate Ligament reconstruction, Printing, Three-dimensional, Arthroscopy",
author = "Iain Rankin and Haroon Rehman and Mark Frame",
year = "2018",
doi = "10.2174/1874325001812010059",
language = "English",
volume = "12",
pages = "59--68",
journal = "The Open Orthopaedics Journal",
issn = "1874-3250",
publisher = "Bentham Open",

}

TY - JOUR

T1 - 3D-Printed Patient-Specific ACL Femoral Tunnel Guide from MRI

AU - Rankin,Iain

AU - Rehman,Haroon

AU - Frame,Mark

PY - 2018

Y1 - 2018

N2 - Background:Traditional ACL reconstruction with non-anatomic techniques can demonstrate unsatisfactory long-term outcomes with regards instability and the degenerative knee changes observed with these results. Anatomic ACL reconstruction attempts to closely reproduce the patient's individual anatomic characteristics with the aim of restoring knee kinematics, in order to improve patient short and long-term outcomes. We designed an arthroscopic, patient-specific, ACL femoral tunnel guide to aid anatomical placement of the ACL graft within the femoral tunnel.Methods:The guide design was based on MRI scan of the subject's uninjured contralateral knee, identifying the femoral footprint and its anatomical position relative to the borders of the femoral articular cartilage. Image processing software was used to create a 3D computer aided design which was subsequently exported to a 3D-printing service.Results:Transparent acrylic based photopolymer, PA220 plastic and 316L stainless steel patient-specific ACL femoral tunnel guides were created; the models produced were accurate with no statistical difference in size and positioning of the center of the ACL femoral footprint guide to MRI (p=0.344, p=0.189, p=0.233 respectively). The guides aim to provide accurate marking of the starting point of the femoral tunnel in arthroscopic ACL reconstruction.Conclusion:This study serves as a proof of concept for the accurate creation of 3D-printed patient-specific guides for the anatomical placement of the femoral tunnel during ACL reconstruction.

AB - Background:Traditional ACL reconstruction with non-anatomic techniques can demonstrate unsatisfactory long-term outcomes with regards instability and the degenerative knee changes observed with these results. Anatomic ACL reconstruction attempts to closely reproduce the patient's individual anatomic characteristics with the aim of restoring knee kinematics, in order to improve patient short and long-term outcomes. We designed an arthroscopic, patient-specific, ACL femoral tunnel guide to aid anatomical placement of the ACL graft within the femoral tunnel.Methods:The guide design was based on MRI scan of the subject's uninjured contralateral knee, identifying the femoral footprint and its anatomical position relative to the borders of the femoral articular cartilage. Image processing software was used to create a 3D computer aided design which was subsequently exported to a 3D-printing service.Results:Transparent acrylic based photopolymer, PA220 plastic and 316L stainless steel patient-specific ACL femoral tunnel guides were created; the models produced were accurate with no statistical difference in size and positioning of the center of the ACL femoral footprint guide to MRI (p=0.344, p=0.189, p=0.233 respectively). The guides aim to provide accurate marking of the starting point of the femoral tunnel in arthroscopic ACL reconstruction.Conclusion:This study serves as a proof of concept for the accurate creation of 3D-printed patient-specific guides for the anatomical placement of the femoral tunnel during ACL reconstruction.

KW - Anterior Cruciate Ligament

KW - ACL

KW - Anatomic

KW - Anterior Cruciate Ligament reconstruction

KW - Printing

KW - Three-dimensional

KW - Arthroscopy

U2 - 10.2174/1874325001812010059

DO - 10.2174/1874325001812010059

M3 - Article

VL - 12

SP - 59

EP - 68

JO - The Open Orthopaedics Journal

T2 - The Open Orthopaedics Journal

JF - The Open Orthopaedics Journal

SN - 1874-3250

ER -