Study	Reason for exclusion
Adnan 2010	This study was not randomised and it evaluated denture bases and not dentures.
Al‐Judy 2015	This study was not randomised and it evaluated denture bases and not dentures.
Au 2000	This study evaluated removable partial dentures made with two different types of materials.
Birtles 2015	The outcomes were not patient‐reported and the study compared two neutral zone impressions with and without maxillary denture on mounted dental cast.
DRKS00000149	The study assessed relining of the denture and not impression materials for complete denture fabrication.
Heydecke 2008	This study compared the same impression techniques and material for both groups.
Hochman 1998	This study was not randomised and it evaluated RPD frame work and not the prosthesis.
Hundal 2015	The outcomes were evaluated for two different types of prosthesis, one being flexible denture.
McCord 2005	Only the mandibular denture was assessed and reported in this study in completely edentulous patients.
Nascimento 2004	This study compared the same impression techniques and material for both groups.
NCT03025555	Outcomes were evaluated for two different types of RPD, one was a flexible denture (polyamide), and the other was polyetheretherketone.
NCT03043456	Outcomes were evaluated for two different types of prostheses, one was a flexible complete denture (polyamide).
NCT03234803	Outcomes were evaluated for two different types of prostheses, one was a flexible denture.
RBR‐8fs5ww	The study assessed removable partial denture versus complete denture.
Sharif 2013	This study was quasi‐randomised.
Tasleem 2013	This study was not randomised.
Wegner 2011	This study compared two relining materials on dentures and not impression material.