Table 1.

Literature search results. The number of articles is presented in the table.

	Implant type			Total
	Hip stem	Hip cup	Knee
Embase	408	199	825	1432
PubMed	238	50	399	687
Web of Science	293	137	352	782
Before de-duplication	939	386	1576	2901
After de-duplication	751	302	1078	2131
Other sources	9	1	1	11
Studies included	63	34	54	151