Which of the following influences incisor position according to dental studies?

The influence of the upper lip, lower lip, and overjet on incisor position is well-supported by dental studies, as these factors are crucial in determining the esthetics of a smile as well as functional occlusion. The upper and lower lips directly affect how the incisors are positioned because they provide the boundaries for the anterior segment of the dental arch. The way these soft tissues rest against the teeth can dictate both the vertical and horizontal position of the incisors.

Further, overjet—defined as the horizontal distance between the maxillary incisors and the mandibular incisors—plays an essential role in incisor positioning as well. A proper overjet allows for functional occlusion and helps maintain the correct relationship between the upper and lower teeth, contributing to a balanced occlusion and facial symmetry.

Taking these considerations into account helps orthodontists in treatment planning and achieving desired outcomes effectively. The influence of soft tissue interactions on incisor positioning underscores the importance of aesthetic profile and functionality in orthodontic practice.