Yeah and ouch. Posterior can still be done for more severe problems, there’s also lateral and minimal plus other kinds. It can happen even if lots of work because of wear and tear especially daily stressing joints despite bones okay. The other sedentary too long it becomes porous or other reasons causing it. So once retired it’s important to exercise.
A friend had one due to accident but had to go back in because of bone damage from the accident. She and her husband T boned and both seriously injured. They ignored a wound behind her leg though and possible tissue injury and turned out that way so walked with her her through that as it got worse and she got to a wound clinic. Amazing got her though these larger injuries ribs and hip and they let this small area go and grew bigger and deeper that could of resulted in sepsis and heading to the bone not to mention permanent indent scaring. That was strange.