Intra-observer and interobserver reliability of the ‘Pico’ computed tomography method for quantification of glenoid bone defect in anterior shoulder instability

Magarelli, Nicola; Milano, Giuseppe; Sergio, Pietro; Santagada, Domenico Alessandro; Fabbriciani, C.; Bonomo, Lorenzo

doi:10.1007/s00256-009-0719-5

Cited by 93 publications

(73 citation statements)

References 35 publications

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“…The same glenoid parameters were used in Magarelli et al's [42] research. They analysed inter-and intra-observer reliability of the method used for anterior gleno-humeral instability assessment based only on 2D-CT images.…”

Section: Discussionmentioning

confidence: 99%

“…They analysed inter-and intra-observer reliability of the method used for anterior gleno-humeral instability assessment based only on 2D-CT images. Magarelli et al [42] showed that measurement of glenoid bone defect in anterior shoulder instability could be assessed based on 2D-CT images, with a very good intra-observer and inter-observer reliability. In turn, Sugaya and co-workers [41] concluded that 2D-CT is not adequate for quantification and surgical planning because it did not show details of the glenoid rim.…”

Section: Discussionmentioning

confidence: 99%

“…1. Then, various parameters of glenoid fossa were measured using the following methods: Gerber and Nyffeler [39], Griffith et al [29], Sugaya et al [41], Barchilon et al [28], Magarelli et al [42] (for description and visualisation of measurements see Table 1 and Fig. 2).…”

Section: D Measurement Methodsmentioning

confidence: 99%

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Reliability of measurements performed on two dimensional and three dimensional computed tomography in glenoid assessment for instability

Kubicka

Stefaniak

Lubiatowski

et al. 2016

International Orthopaedics (SICOT)

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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 interobserver 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 -C T. 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.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Reliability of measurements performed on two dimensional and three dimensional computed tomography in glenoid assessment for instability

Kubicka

Stefaniak

Lubiatowski

et al. 2016

International Orthopaedics (SICOT)

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“…Several authors have concluded that the PICO measurement technique reliably produces an accurate and reliable measure of glenoid bone loss in shoulder instability [29][30][31] . The PICO method involves obtaining en-face 3D views of both the affected and normal glenoid.…”

Section: Glenoid Bone Lossmentioning

confidence: 99%

Current concepts in the management of recurrent anterior gleno-humeral joint instability with bone loss

Ramhamadany

Modi

2016

WJO

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The management of recurrent anterior gleno-humeral joint instability is challenging in the presence of bone loss. It is often seen in young athletic patients and dislocations related to epileptic seizures and may involve glenoid bone deficiency, humeral bone deficiency or combined bipolar lesions. It is critical to accurately identify and assess the amount and position of bone loss in order to select the most appropriate treatment and reduce the risk of recurrent instability after surgery. The current literature suggests that coracoid and iliac crest bone block transfers are reliable for treating glenoid defects. The treatment of humeral defects is more controversial, however, although good early results have been reported after arthroscopic Remplissage for small defects. Larger humeral defects may require complex reconstruction or partial resurfacing. There is currently very limited evidence to support treatment strategies when dealing with bipolar lesions. The aim of this review is to summarise the current evidence regarding the best imaging modalities and treatment strategies in managing this complex problem relating particularly to contact athletes and dislocations related to epileptic seizures.

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“…The loss of the anterior sclerotic glenoid line (SGL) in neutral rotation radiographs is currently widely used to detect anterior glenoid bone loss [20]. CT-scan measurement methods of anterior glenoid bone loss have been recently developed [4,17,24,29]. Gerber et al [15] also published a simple method of measuring antero-inferior glenoid bone loss on 2D CT-scans and entitled it the X index.…”

Section: Introductionmentioning

confidence: 98%

The intra- and inter-observer reliability of the CT-scan based X index to quantify glenoid bone loss in chronic anterior shoulder instability and its impact on decision making

Maqdes¹,

Chammai²,

Lengert³

et al. 2014

Eur J Orthop Surg Traumatol

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Intra-observer and interobserver reliability of the ‘Pico’ computed tomography method for quantification of glenoid bone defect in anterior shoulder instability

Abstract: Measurement of glenoid bone defect in anterior shoulder instability can be assessed with the Pico method, based on en face images of the glenoid processed in MPR, with a very good intra-observer and interobserver reliability.

Cited by 93 publications

References 35 publications

Reliability of measurements performed on two dimensional and three dimensional computed tomography in glenoid assessment for instability

Reliability of measurements performed on two dimensional and three dimensional computed tomography in glenoid assessment for instability

Current concepts in the management of recurrent anterior gleno-humeral joint instability with bone loss

The intra- and inter-observer reliability of the CT-scan based X index to quantify glenoid bone loss in chronic anterior shoulder instability and its impact on decision making

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