The mouth is typically closed after death by a process called rigor mortis, which sets in a few hours after death.
Rigor mortis is the stiffening of the muscles, including the muscles of the jaw. This stiffening causes the jaw to close naturally.
In some cases, the mouth might not close completely due to factors such as:
- Injury to the jaw: A broken jaw or other injuries to the jaw can prevent it from closing.
- Prior medical conditions: Certain conditions, such as tetanus, can cause the jaw muscles to lock in a clenched position.
- Position of the body: If the body is positioned in a way that puts pressure on the jaw, it may prevent it from closing.
If the mouth does not close naturally, it can be closed manually using a mouth closure device. This device helps to keep the mouth shut and prevent the jaw from falling open.
Mouth closure is important in the preparation of a body for burial or cremation as it helps to maintain a dignified appearance.
