Table 1 Main characteristics extracted from the included studies
Study | Year | Study design | No. implants for patient, anchorage system | No. patients | OVD design | Opposing arch | System used for estimation of patient-reported results (Score range) |
|---|---|---|---|---|---|---|---|
Boven et al. [23] | 2020 | RCT | 4, bar | 24 | Palateless | Implant-retained overdenture | 10-point rating scale (> 8) |
Park et al. [31] | 2019 | RCT | 4, bar | 16 | Full palatal coverage | ND | 10-point rating scale (> 9) |
Slot et al. [19] | 2019 | RCT | 4, bar 6, bar | 29 31 | Palateless Palateless | Implant-retained overdenture Implant-retained overdenture | 10-point rating scale (> 8) 10-point rating scale (> 8) |
Slot et al. [20] | 2016 | RCT | 4, bar 6, bar | 24 22 | Partial coverage Partial coverage | Implant-retained overdenture Implant-retained overdenture | 10-point rating scale (> 8) 10-point rating scale (> 8) |
Slot et al. [21] | 2013 | RCT | 4, bar 6, bar | 24 25 | Palateless | Implant-retained overdenture | 10-point rating scale (> 8) 10-point rating scale (> 8) |
Slot et al. [22] | 2014 | RCT | 4, bar 6, bar | 33 33 | Palateless Palateless | Implant-retained overdenture Implan-retained overdenture | 10-point rating scale (> 8) 10-point rating scale (> 8) |
Boven et al. [24] | 2017 | Prospective | 6, bar ( anterior) 6, bar ( posterior) | 25 25 | Palateless Palateless | Natural teeth Natural teeth | 10-point rating scale (> 8) 10-point rating scale (> 8) |
Krennmair et al. [25] | 2008 | Retrospective | 4, bar | 16 | Palateless | Implant-retained overdenture (ND) Fixed partial denture (ND) Natural teeth (ND) | Likert scale 1–5 (> 4.6) |
Zou et al. [26] | 2013 | Prospective | 4, bar | 10 | ND | ND | Likert scale 0–2 (1–2) |
Mangano et al. [27] | 2014 | Prospective | 4, bar | 28 | Palateless | Implant-retained overdenture | ND |
Katsoulis et al. [28] | 2011 | Prospective | 4, bar 6,bar | 22 1 | Palateless Palateless | Tooth-implant-supported- fixed prosthesis (ND) Natural teeth (ND) | ND |
Mangano et al. [29] | 2011 | Prospective | 4, bar | 38 | Palateless | Implant-retained overdenture | ND |
Akca et al. [30] | 2010 | Prospective | 4, bar | 11 | ND | Implant-supported overdenture (4) Implant-supported fixed prosthesis (1) Tooth-supported removable denture (1) Tooth-supported fixed prosthesis (4) Natural teeth (1) | ND |
Ferrigno et al. [10] | 2002 | Prospective | 4, bar 6, bar | 16 19 | ND ND | ND ND | ND ND |
Van Assche [32] | 2012 | Prospective | 6, bar | 12 | Palateless | ND | ND |