Impingement During Dislocation-Prone Activities: Geometric Modeling Analysis of an Uncemented Standard Versus Modular Dual Mobility Acetabular Cups

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

1. This paper is the comparative study of impingement in dual mobility and standard acetabular cups during high-Risk dislocation movements using geometrical model in solidworks.
2. Overall, the method is technically sound. The paper was written well, clear, organized and concise.
3. Here are a few more comments to help improve the paper. Since the geometrical model doesn’t account for muscles, tendons, ligaments, or capsule tension, the actual ROM and impingement might be significantly different from this study. How would you justify this research without taking that into consideration.
4. Since solidworks can apply load or pressure, can you apply load so that the load may reflect real-life gait or loading conditions. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

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Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

This paper discusses about the risk of impingement between standard and dual mobility cups investigated using geometric modelling. The manuscript is of interest for researchers in this area. However, it will be better if the following comments is considered in the manuscript.

1. Please give more detail explanation regarding the positioning of the stem. Was the stem axis matched with the femoral axis?
2. Please show the coordinate systems used in this study. Furthermore, please show the direction of flexion/extension, abduction/adduction, internal/external rotation based on the coordinate systems.
3. Line 103: incorrect figure number
4. Line 111-113: What is “a walking profile”? Did you mean joint motion shown in Figure 2?
5. Figure 4-8: 4x4 boxes are unclear.
6. Threshold for interference was set to be >1mm³ . Could you provide the maximum value of the overlapped volume found in this study? In real world, contact force occurred between two components should prevent a high value of overlapped volume.

 

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

Comments and Suggestions for Authors

Thank you for your response. It is very nice study.