The influence of fixed splints on mandibular flexure

Abstract

The degree of mandibular flexure during forced opening of the jaws with various fixed splints in place was measured. Significant results indicate that: (1) all splints tested reduce the amount of mandibular flexure; (2) the reduction of measured mandibular flexure cannot be explained solely by tooth movement, rather it is indicative of a limitation of bony flexure by fixed splints; (3) extensive mandibular splints flex during forced opening; and (4) fixed prostheses involving many teeth do not completely inhibit mandibular flexure. Inhibition of mandibular flexure apparently increases as more teeth are splinted and more rigid attachments are used.