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 |
OVD: overdenture. ND: not determined