Fig 4. Maximum stress at each point in the L-strut.

A. The stress was constant at point 1 (pressure exertion region), regardless of the applied load location and the contact percentage with the maxillary crest. B. Stress at point 2 decreased gradually after an initial increase, according to changes in the applied load caudally from the rhinion. In particular, the maximum L-strut stress occurred at point 2 under the location 5 and 6 load conditions, regardless of changes in contact percentage. C. The stress at point 3 increased when the location of the applied load was changed from the rhinion to the supratip breakpoint.