Table A1.

Table reporting the 11 excluded studies and reasons for exclusion.

Study	Reason for Exclusion
Jemt et al. 1998	(redundant)
Bergendal and Palmquist 1995	(redundant)
Ortorp et al. 2000	(redundant)
Ortorp et al. 2002	(redundant)
Ortorp et al. 2004	(redundant)
Cannizzaro et al. 2014	(redundant)
Pozzi et al. 2015	(non-comparative)
Merli et al. 2017	(insufficient follow-up)
Wolff et al. 2018	(non-comparative)
Castorina et al. 2019	(case report)
Hulterström et al. 1991	(only one framework material tested)