Surface strains induced by measured loads on teeth in vivo: a methodological study.
Visual feedback enabled three subjects to apply predetermined near-axial loads to the incisal edge of an intact maxillary central incisor. In two subjects, principal strains and orientations developed on the labial surface of the intact incisor were resolved from strains recorded with a multiple element strain gauge. Load application was accurate and precise enough to allow resolution of strains induced by target loads of 10 to 50 N. Axially orientated compressive labial surface strains were induced by measured loads. The method could be used to validate bench-top stress analyses and investigate the effects of restoration on the structural integrity of teeth.
Nohl
F S
FS
Department of Restorative Dentistry, Newcastle Dental Hospital, Richardson Road, Newcastle upon Tyne NE2 4AZ, UK.
Setchell
D J
DJ
D003799:Dental Stress Analysis / Q000295:instrumentation / Q000379:methods*; D005246:Feedback; D006801:Humans; D007180:Incisor / Q000502:physiology*; D008437:Maxilla; D011434:Proprioception; D015203:Reproducibility of Results; D013499:Surface Properties