“…Twenty of the included studies were RCTs (Table 2; Table ) comparing directly veneered zirconia customized and stock zirconia abutments with cemented ceramic SCs (Wittneben et al, 2020), esthetic outcomes for screw‐retained SCs with or without using provisional crowns for tissue conditioning (Furze et al, 2019), metal‐ceramic and resin‐matrix ceramic SCs (Agustín‐Panadero et al, 2020), monolithic zirconia and porcelain‐fused‐to‐metal (PFM) implant‐supported SCs (Mühlemann et al, 2020), cemented and screw‐retained SCs on customized zirconia abutments (Heierle et al, 2019), 11 mm implants used in combination with sinus floor elevation and 6mm implants without bone augmentation (Guljé et al, 2019b), screw‐retained monolithic zirconia and cemented PFM SCs (Weigl, Saarepera, et al, 2019), submucosal veneered zirconia abutments and non‐veneered zirconia abutments (Laass et al, 2019), immediate, non‐detached glass‐ceramic individualized abutments and dis‐/reconnections (Erhan Çömlekoğlu et al, 2018), monolithic zirconia SCs and short‐span FDPs (Cheng et al, 2019), cemented and screw‐retained zirconia‐based implant‐supported SCs (Kraus et al, 2019), tooth‐ and implant‐supported veneered zirconia single SCs (Cantner et al, 2019), cemented and screw‐retained CAD/CAM zirconia abutments for esthetically located implant‐supported SCs (Amorfini et al, 2018), digital and analog procedures for manufacturing of implant‐supported SCs (Mangano & Veronesi, 2018), customized zirconia and titanium abutments (Bösch et al, 2018), immediately loaded one‐ and two‐piece implants (Bomicke et al, 2017), two‐piece and one‐piece zirconia abutments (Paolantoni et al, 2016), bonding of a RMC restorative material to zirconia stock abutments and zirconia customized abutments (Schepke et al, 2016), zirconia and titanium abutments (Zembic et al, 2013), and zirconia and metal‐ceramic implant‐supported SCs (Hosseini et al, 2011) (Table ). The remaining 29 studies were prospective cohort studies (Andersson et al, 1998; Cantner et al, 2019; Canullo, 2007; Cheng et al, 2019; Cooper et al, 2016; Fenner et al, 2016; Gierthmuehlen et al, 2020; Guarnieri et al, 2015; Guljé et al, 2019a; Guncu et al, 2016; Henriksson & Jemt, 2003; Hosseini et al, 2011; Hosseini et al, 2013; Joda et al, 2017; Kolgeci et a...…”