Patients are to be approached to attend clinic who have been identified as being implanted with either a Lima Corporate Delta Revision TT, Delta One TT or the Delta Multihole Systems hip systems between 2011 and 2015, a minimum of 10 years since hip surgery. They will be x-rayed (AP pelvis and a lateral view) and have a clinical review in clinic.

Since its popularisation in the 1960's, Hip replacements have become one of the NHS's highest volume procedures. Unfortunately, hip replacements can fail with on average 8,500 revision hip replacements being performed each year pre-covid(1). Often this is very complex with destruction of the normal anatomy leaving surgeons with a significant challenge in ensuring appropriate positioning of the socket within the confines of the patient's anatomy.

The Lima Corporate Delta systems are designed to help surgeons with this very problem by providing the option of a 'face changer' allowing surgeons to place a socket within a socket.

To allow for this function, the 'face changer' must connect with the acetabular cup (socket).

140 patients have been identified as having had this modular acetabular system implanted at the RJAH in 2012 & 2014, going into 2015. The aim of this study is to therefore identify the survivorship of these implants at 10 years.

Inclusion Criteria:

All adult patients who had Lima Corporate modular titanium acetabular component implants implanted between 2011 and 2015.

Exclusion Criteria:

Deceased patients Patients who have undergone a subsequent acetabular revision Patients that lack capacity Prisoners in the custody of HM Prison service or who are offenders supervised by the probation service in England or Wales.

All adult patients who had Lima Corporate modular titanium acetabular component implants implanted between 2011 and 2015.