Anna Maria Kubicka1, Jakub Stefaniak2,3, Przemysław Lubiatowski2,3, Jan Długosz3, Marcin Dzianach3, Marcin Redman2, Janusz Piontek4, Leszek Romanowski2. 1. Department of Human Evolutionary Biology, Adam Mickiewicz University in Poznań, Umultowska 89, PL-61-614, Poznań, Poland. akubicka@amu.edu.pl. 2. Department of Traumatology, Orthopaedics and Hand Surgery, University of Medical Sciences in Poznań, Poznań, Poland. 3. Rehasport Clinic, Poznań, Poland. 4. Department of Human Evolutionary Biology, Adam Mickiewicz University in Poznań, Umultowska 89, PL-61-614, Poznań, Poland.
Abstract
PURPOSE: The main purpose of this study is to establish which of two methods is more reliable in glenoid assessment for instability in pre-operative planning. Accordingly, we have studied the intra- and inter-observer reliability of glenoid parameters with the use of two-dimensional (2D) and three-dimensional (3D) reconstructed computed tomography (CT) images. METHODS: One hundred glenoids were measured with the use of 2D-CT and 3D-CT (in 3D orientation) by two independent observers (one experienced and one inexperienced). Measurements were repeated after one week for 30 randomly selected glenoids. RESULTS: The intra-class correlation coefficient (ICC) for inter-observer reliability was significantly greater for 3D-CT (0.811 to 0.915) than for 2D-CT (0.523 to 0.925). All intra-observer reliability values for 3D-CT were near perfect (0.835 to 0.997), while those for 2D-CT were less reliable (0.704 to 0.960). A dependent t-test showed that, for both observers, almost all glenoid parameters (except R and d) differed significantly (p < 0.05) between 2D and 3D measurement methods. CONCLUSIONS: Therefore, it can be concluded that 3D glenoid reconstructions are more reliable for glenoid bone loss assessment than 2D-CT. The results suggest that quantifying a glenoid defect with the use of 2D image only-even if performed by an experienced orthopaedic surgeon-is prone to errors. Differences in measurements between and within observers can be explained by plane setting and identifying glenoid rim in 2D-CT. Accordingly, we recommend that glenoid measurements should be performed in 3D orientation using 3D reconstruction obtained from CT images for pre-operative assessments, which are crucial for surgical planning.
PURPOSE: The main purpose of this study is to establish which of two methods is more reliable in glenoid assessment for instability in pre-operative planning. Accordingly, we have studied the intra- and inter-observer reliability of glenoid parameters with the use of two-dimensional (2D) and three-dimensional (3D) reconstructed computed tomography (CT) images. METHODS: One hundred glenoids were measured with the use of 2D-CT and 3D-CT (in 3D orientation) by two independent observers (one experienced and one inexperienced). Measurements were repeated after one week for 30 randomly selected glenoids. RESULTS: The intra-class correlation coefficient (ICC) for inter-observer reliability was significantly greater for 3D-CT (0.811 to 0.915) than for 2D-CT (0.523 to 0.925). All intra-observer reliability values for 3D-CT were near perfect (0.835 to 0.997), while those for 2D-CT were less reliable (0.704 to 0.960). A dependent t-test showed that, for both observers, almost all glenoid parameters (except R and d) differed significantly (p < 0.05) between 2D and 3D measurement methods. CONCLUSIONS: Therefore, it can be concluded that 3D glenoid reconstructions are more reliable for glenoid bone loss assessment than 2D-CT. The results suggest that quantifying a glenoid defect with the use of 2D image only-even if performed by an experienced orthopaedic surgeon-is prone to errors. Differences in measurements between and within observers can be explained by plane setting and identifying glenoid rim in 2D-CT. Accordingly, we recommend that glenoid measurements should be performed in 3D orientation using 3D reconstruction obtained from CT images for pre-operative assessments, which are crucial for surgical planning.
Authors: Pol E Huijsmans; Pieter S Haen; Martin Kidd; Wouter J Dhert; Victor P M van der Hulst; W Jaap Willems Journal: J Shoulder Elbow Surg Date: 2007 Nov-Dec Impact factor: 3.019
Authors: Benjamin Bockmann; Sonja Soschynski; Philipp Lechler; Steffen Ruchholtz; Florian Debus; Tim Schwarting; Michael Frink Journal: Int Orthop Date: 2015-07-07 Impact factor: 3.075
Authors: Lucca Lacheta; Elmar Herbst; Andreas Voss; Sepp Braun; Pia Jungmann; Peter J Millett; Andreas Imhoff; Frank Martetschläger Journal: Knee Surg Sports Traumatol Arthrosc Date: 2019-02-06 Impact factor: 4.342