Related Experiment Video
Updated: Jun 5, 2026
Fracture Apparatus Design and Protocol Optimization for Closed-stabilized Fractures in Rodents
Published on: August 14, 2018
The effect of Cox-2 specific inhibition on direct fracture healing in the rabbit tibia
David J Hak1, Kurt S Schulz, Behrang Khoie
1Denver Health/University of Colorado, 777 Bannock Street, MC 0188, Denver, CO 80204, USA. david.hak@dhha.org
Objective:
The purpose of this study was to evaluate the effect of Cox-2 administration on direct (primary) fracture healing.
Methods:
A transverse tibial osteotomy was created in adult male rabbits and rigidly fixed in compression using a 2.7-mm dynamic compression plate. Animals were randomized to receive either rofecoxib (12.5 mg orally per day) or placebo. Animals were killed at 4 weeks and fracture healing assessed by mechanical testing.
Results:
There were no significant differences between the control and Cox-2 treated animals in terms of mechanical strength at 4 weeks. There was a high complication rate of peri-implant fractures during the daily medication administration.
Conclusion:
The immediate administration of a Cox-2 specific inhibitor did not impair primary (direct) bone healing at the dose administered in this rabbit tibial osteotomy model.
