With an incomplete fracture the bone does break but not all the way through.
From the news.enquirer.com
Since children have softer bones than adults do, one side of the bone can buckle upon itself without disrupting the other side in this type of incomplete fracture.
From the sciencedaily.com
After undergoing a series of tests earlier this week, it was learned that Bogut suffered an incomplete stress fracture in his lower back.
From the kentucky.com
Severe single-incident TBI, with or without skull fracture, can lead to permanent brain damage, with incomplete recovery and residual sensory, motor and cognitive deficits.