Teeth suddenly breaking?

I was told by my dentist that bread is often seen as the culprit as it makes a sort of soft gluey paste as you chew it that basically lifts away anything that is already cracked/vulnerable.

I understand that if your bite is uneaven (through absence of teeth) the pressure on the good remaining teeth makes them prone to cracks.

They said you can "get by" as an adult on just 20 teeth if they are in the right places!
20 does not sound very many to me.

Well, I am on a lot of medications, I’ll have to enquire when I go home. Because if losing the bridge, I am wearing on my front teeth much more hence paying for an implant. I wish I could have at least two more but too expensive and I’m not convinced at 76 that I would ‘get my moneys worth’. I have to have this one so I can eat more comfortably though.

My front tooth broke off during the Pandemic. It wasn't decayed and there was no sign of gum disease.
The only expalnation was the many medications I was on and comorbidities may have been responsible.

It was awful as, I was shielding and it was too risky to have treatment initially.