Title {1}	The Knee-Fix study: study protocol for a randomised controlled trial evaluating cemented vs. cementless components in total knee arthroplasty
Trial registration {2a and 2b}.	Australian New Zealand Clinical Trials Registry Identifier ACTRN12616001624471. Registered trial name: Knee-Fix study (Cemented vs Uncemented Total Knee Replacement). Registered on November 24, 2016.
Protocol version {3}	Protocol version 1.2, May 2019
Funding {4}	This study is funded by the Orthopaedic Education and Research Fund: Three Harbours Health Foundation (Waitemata District Health Board, New Zealand). Stryker (New Zealand) provided research assistant funding support for facilitating follow-up visits.
Author details {5a}	1Department of Orthopaedic Surgery, North Shore Hospital, Auckland, New Zealand 2Department of Surgery, University of Auckland, Auckland, New Zealand
Name and contact information for the trial sponsor {5b}	North Shore Hospital, Takapuna, Auckland 0740, New Zealand.
Role of sponsor {5c}	The study sponsor is not involved in study design, collection, management, analysis, and interpretation of data; writing of the report; and any decisions to submit the report for publication.