In Postural rest position, there is 2mm gap is normal between tooth. There is no teeth touch each other during rest position. If it touch during rest ,it will cause constant strain in muscles and cause pain. Lip is closed at rest ,it is called competent lip.if open during rest it called incompetent lips it indicate upper front tooth proclination or parafunctional habits

Hello. Not completely touching each other slight gap is present.

No...there will be slight diffrence at rest

Hello No they should not touch

Hello There is slight gap between the teeth