The evaluation concluded the implant connection collar on the abutment has been damaged during the processing of final restoration.Significant grinding damage to the implant connection collar of the abutment.Grinding changes the dimensions and geometry of the specifically designed implant conical connection between the abutment and the implant so that there is no longer a uniform connection around the abutment/implant junction.Because there is no longer a uniform connection, forces will cause the abutment to rock in the junction and apply forces to the hex.The hex is designed to be passive so when acted on by the forces caused by the rocking of the abutment, the hex failed and fractured.
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