Table 1.
Characteristics of the included studies and their interventions
| Treatment modality | Publication | Study design | Number of patients | Number of impressions | Type of restoration | Scanner system | Area of IOS | Conventional impression material | Outcomes measured |
|---|---|---|---|---|---|---|---|---|---|
| Tooth-supported | Gjelvold et al. 2016 | RCT | 48 | 24 IOS/24 CI | SC and FDPs | Trios Standard P-12 (3Shape A/S, Copenhagen, Denmark) | Complete-arch scan | (Impregum Penta; 3M ESPE Dental Products, St. Paul, MN) | Time and PROMs |
| Benic et al. 2016 | RCT | 10 | 30 IOS/10 CI | SC | Lava (Lava C.O.S.; 3M ESPE), iTero (Align Technology Inc), and CEREC (CEREC Bluecam; Sirona Dental Systems) | Quadrant scan | Polyvinyl siloxane (A-silicone) light and regular body materials (President; Coltène/Whaledent AG) | Time and PROMs | |
| Ahrberg et al. 2016 | RCT | 25 | 25 IOS/25 CI | SC and FDPs | Lava C.O.S. | Quadrant and complete-arch scan | (Impregum Penta; 3M ESPE Dental Products, St. Paul, MN) | Time | |
| Sakornwimon and Leevailoj, 2017 | RCT | 16 | 8 IOS/8 CI | SC | 3M True Definition scanner | Quadrant scan | PVS (Express XT Putty Soft + Express XT Light Body; 3M ESPE) + alginate (antagonist) | PROMs | |
| Haddadi et al. 2018 | RCT | 19 | 19 IOS/19 CI | SC | Trios 3 (3Shape A/S, Copenhagen, Denmark) | Quadrant scan | PVS (Extrude, Kerr) + alginate (antagonist) | Time and PROMs | |
| Koulivand et al. 2020 | Prospective | 25 | 25 IOS/25 CI | SC | Trios (3Shape A/S, Copenhagen, Denmark) | Quadrant scan | Heavy-body putty followed by light body PVS (X-light silicone: A-silicone, Panasil, Kettenbach GmbH & Co. KG, Germany). | Time | |
| Sailer et al. 2019 | RCT | 10 | 30 IOS/10 CI | FDPs | Lava C.O.S.; 3M, iTero; Align Technology Inc, CEREC Bluecam; Dentsply Sirona. | Complete-arch scan | Permadyne; 3M ESPE Dental Products, St. Paul, MN) | Time and PROMs | |
| Implant-supported | Wismeijer et al. 2014 | Prospective | 30 | 30 IOS/30 CI | SC and FDPs | iTero scanner, Align Tech Inc | Quadrant scan | (Impregum Penta; 3M ESPE Dental Products, St. Paul, MN) + alginate (Cavex) | Time and PROMs |
| Schepke et al. 2015 | Prospective | 48 | 48 IOS/48 CI | SC | CEREC Omnicam; Dentsply Sirona | Complete-arch scan | (Impregum Penta; 3M ESPE Dental Products, St. Paul, MN) | Time and PROMs | |
| Gherlone et al. 2016 | Prospective | 25 | 15 IOS/15 CI | IFCDs | Trios (3Shape A/S, Copenhagen, Denmark) | Complete-arch scan | Permadyne; 3M ESPE Dental Products, St. Paul, MN) | Time | |
| Joda and Bragger 2016 | RCT | 20 | 20 IOS/20 CI | SC | iTero; Align Technology Inc | Quadrant scan | (Impregum Penta; 3M ESPE Dental Products, St. Paul, MN) | Time and PROMs | |
| Di Fiore et al. 2018 | Prospective | 10 | 10 IOS/10 CI | SC | CEREC Omnicam; Dentsply Sirona | Quadrant scan | (Impregum Penta; 3M ESPE Dental Products, St. Paul, MN) | Time | |
| Pan et al. 2019 | Prospective | 20* | 20 IOS/20 CI | SC | Trios-1 (3Shape Standard P-11 A/S, Copenhagen, Denmark) | Complete-arch scan | (Impregum Penta; 3M ESPE GmbH, Neuss, Germany) | Time | |
| Guo et al. 2019 | Prospective | 20 | 40 IOS/20 CI | SC | Trios-1 (3Shape Standard P-11 A/S, Copenhagen, Denmark) | Complete-arch scan | (Impregum Penta; 3M ESPE GmbH, Neuss, Germany) | PROMs | |
| Delize et al. 2019 | Prospective | 31 | 31 IOS/31 CI | SC | Trios 2 (3Shape A/S, Copenhagen, Denmark) | Quadrant scan | Heavy‐ and light‐viscosity silicone (Imprint 4® impression material, 3M) | PROMs | |
| Cappare et al. 2019 | RCT | 50 | 25 IOS/25 CI | IFCDs | Carestream CS 3600 (Carestream Dental LLC, Atlanta, GA, USA). | Complete-arch scan | Gypsum (Éclair Class II, Ultima, Angers, France) | Time | |
| Lee et al. 2021 | RCT | 30 | 30 IOS/30 CI | SC | IOS (iTero Element; Align Technology Inc) | Quadrant scan | (PVS) impression material (Aquasil Ultra Monophase Light Viscosity; Dentsply Sirona) | Time and PROMs |
Legend: RCT, randomized clinical trial; IOS, intraoral scanning; CI, conventional impression; SC, single crown; FDP, fixed dental prosthesis; IFCDs, implant-fixed complete dentures; PROMs, patient-reported outcome measures
*Original study included 40 patients; however, only 20 patients were analyzed separately as the other 20 patients (bone-level implants) were included in Guo et al. 2019 study