“…A recent systematic review showed that soft silicone reliner provided denture wearers with increased masticatory function compared to conventional acrylic resin materials (Palla, Karaoglani, Naka, & Anastassiadou, 2015). Some authors reported that the application of silicone soft reliner to mandibular complete dentures resulted in significant improvements in the patients' masticatory performance and OHRQoL compared to conventional hard acrylic denture reline (Furokawa et al, 2020;Hayakawa, Hirano, Takahashi, & Keh, 2000;Kar, Tripathi, & Fatima, 2019;Kimoto et al, 2004;Kimoto et al, 2006;Pisani et al, 2012). However, there are few reports regarding the application of a silicone soft reliner to maxillary obturator prosthesis, (Singh et al, 2015;Taira et al, 2007) and its verification has not been done at all.…”