Table 2

Intervention/exposure of included studies

Intervention/exposure groupControl treatment group
SourceRandomised/included exposure participants (non-completers), nTreatment receivedRandomised/included control participants (non-completers), nTreatment received
Müller et al1923 (7)A mandibular two implant overdenture22 (4)A mandibular complete denture with relines
Hamdan et al21127 (24)A mandibular two implant overdenture128 (14)A mandibular complete denture
Awad et al13127 (17)A mandibular two implant overdenture128 (19)A mandibular complete denture
Gjengedal et al1230 (3)A mandibular two implant overdenture30 (4)A mandibular complete denture with relines
Morais et al1530 (1)A mandibular two implant overdenture30 (27)A mandibular complete denture
Hamada et al2362 (25)A mandibular two implant overdenture40 (19)A mandibular complete denture
Muller et al2229 (unclear)A mandibular implant supported overdenture24 (unclear)A mandibular complete denture
Sebring et al2741 (unclear)A mandibular implant supported overdenture30 (unclear)A mandibular complete denture