Photoelastic stress analysis of load transfer to implants and natural teeth comparing rigid and semirigid connectors

Biomechanical outcomes of tooth-implant-supported fixed partial prostheses (FPPs) in periodontally healthy patients using root shape dental implants

“…Nishimura et al 16 conducted photoelastic stress analysis to evaluate stress distribution in an implanttooth splinted system using different types of connectors. They fabricated a life-size photoelastic model of an adult human left mandible for quasi-3 dimensional testing.…”

“…Load transfer to implants and natural tooth changing the number of splinted implants were estimated by Nishimura et al 16 . They performed quasi-3D testing, analyzed a photoelastic model and changed the number of splinted implants by removing of the abutment of the medial standing implant.…”

“…To overcome the difference in mobility and the above mentioned problems non-rigid connector types have been proposed by different authors [15][16][17] . However, there is no clear consensus regarding the effectiveness of this type of connectors because of the potential clinical hazard of natural tooth intrusion 5 .…”

Photoelastic Analysis of the Effects of Tooth Position on Apical Stress

“…Despite the limitations of photoelastic models, this technique has been extensively and successfully used in dental biomechanics to study the interaction of tissue response and physical characteristics of prosthetic restorations, while at the same time permitting an experimental design that limits both patient and operator variables. Until now, only a few studies have focused on the entire dentition, rather than just a local portion of dentition (e.g., an implant area) [12][13][14]. Two-dimensional analysis has been applied to alveolar bone [15,16], and Lyons [17] constructed composite photoelastic models of a human maxilla including teeth and restoration apparatus in order to measure the stress of the abutment.…”

Ferulizaciones diente-implante

“…Si no tuviéra-mos en cuenta estas y otras variables en el análisis, el resultado hubiera redundado en una menor diferencia entre las prótesis implantosoportadas y las prótesis implantodentosoportadas rígidas, con lo que tendría-mos un resultado muy similar al que encontraron Gunne et al (1999) o Hosny et al (2000). Nishimura et al (1999), mediante el empleo de análisis fotoelástico, observaron una considerable reducción del estrés aplicado sobre el implante al establecer conexiones semirrígidas. En este estudio se ve cómo las aplicaciones de cargas oclusales sobre el diente aumentaban el estrés apical y crestalmente al implante conectado rígidamente.…”