Hello & welcome,
What you are talking about is called as Bruxism
or Nigh grinding of teeth.
If your husband is suffering from Bruxism or grinds his teeth during sleep, then there must be underlying cause behind it & should be diagnosed.
Most common cause for night grinding of the teeth is Emotional Stress
. Even this grinding can be seen in the school going children who are under stress.
It is also seen in some patients undergoing orthodontic treatment for alignment of the teeth as Mal-occlusion or irregular teeth contact creates stress unknowingly.
But whatever may be the reason , it should be treated immediately so as to prevent damage to teeth.
Use of Night guard which is made by dentist
by taking proper impression or measurement of dentition & which is to be worn by patient at night is very important as it prevents direct contact between teeth & thereby giving cushioning effect.
Bruxism can cause wearing or attrition of teeth which makes the teeth sensitive to water or air & then requiring root canal treatment
to be done if extensive.
Bruxism also cause vertical bone loss due to force being transmitted to underlying bone followed by making the teeth mobile along with damage to periodontium
. If bone loss is severe , then extraction might be necessary.
So visit your dentist & let your husband to undergo thorough clinical examination to know the cause & treatment to be done accordingly.