“…11 The Optosil ® (Heraeus Kulzer, Hanau, Germany) family of artificial (polydimethylsiloxane) test foods is considered to be suitable, 1,2,4,5,6,9,10,11,12,13,14,15 as it has produced results with validated correlations with other masticatory factors, such as the number of occlusal pairs and bite force. 3,4,5,6 However, few studies have properly evaluated the reproducibility of results obtained with Optosil ® products [Optosil ® 1980, 9,12 Optosil P Plus ® , 4 and Optosil Comfort ®13,14,15 (OC)]. Interestingly, the use of 5.6-mm Optosil ® cubes 4,9,12 yielded a lower X 50 value than that obtained with OC 13,14,15 in dentate subjects.…”