We are grateful to Drs. Banerjee and Kheiran for carefully reading our article [1]. They made excellent points that deserve clarification. Regarding a breakdown of the openings for each TKA and THA for primary and revision procedures, the data are as follows: the average operating room times for primary TKA and THA were 109 and 93 minutes, respectively. Average door openings were 58 in primary TKA cases and 62 in primary THA cases, yielding per minute rates of 0.53 and 0.67, respectively. The average operating room times for revision TKA and revision THA were 160 minutes and 161 minutes respectively. Door openings averaged 132 in revision TKA cases and 138 in revision THA cases, yielding per minute rates of 0.83 and 0.86, respectively.
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