Fig. 1From: Distal extension of palatal rugae as a limitation for donor soft tissue grafts in a Jordanian population: A cross-sectional studyDistribution of rugae distal extension frequencies by site. Note: It can be seen that the largest percentage with the highest distal extension frequency is that representing the distal of the second premolar. Most of the rugae extended distally beyond the mesial aspect of the upper second premolar. Rugae extension mesial to the upper first premolar represents only a minute percentage of the totalBack to article page