Pressure from the lips on the teeth and XXXX .

@entity1 @entity7166 @entity3232
The relationship between lip strength and lip pressure (pressure from the lips on the teeth) was studied in 84 @entity1 (aged 7 to 16 years) with varying types of @entity3232 . The lip strength was recorded with a dynamometer. The lip pressure was measured on the upper and lower central incisors in the rest position, and during chewing and swallowing of crispbread. The lip pressure measurements were made with an extraoral pressure transducer incorporated in a water-filled system with an intraoral mouthpiece. The muscle activity of the lips was recorded electromyographically. Bite and facial morphologies were studied on dental casts and profile cephalograms. There was no correlation between lip strength and lip pressure. Lip strength was lower in @entity1 with Angle Class II, Division 1 @entity3232 than in @entity1 with @entity7166 . The lip pressure on the upper incisors, on the other hand, was higher in Class II, Division 1 than in @entity7166 , and was lowest in @entity1 with Class II, Division 2 @entity3232 . The findings suggest that the pressure from the lips on the teeth is a result of the incisor position.
