Total Hip Replacement (known also as Total Hip Arthroplasty - THA) uses anti-biotic medical cement for stem implant fixation; this has been the ’gold’ standard for many years. However, cement adhesion is susceptible to loosening and as a consequence stem migration causes adverse pain and discomfort to the patient. Over the last 15 years total joint arthroplasty in 50% of all cases have moved to the use of ‘press fit’ non-cemented prostheses. However, failed non-cemented implants are very stubborn and challenging to remove during Hip Revisional (HR) surgery leading to excessive losses of healthy bone stock. In most cases an Extensive Trochanteric Osteotomy (ETO) procedure is required along with a high cost bespoke replacement implant. An ETO takes approximately 5 hours and costs at least 10 times the cost of a primary THR procedure. An ETO procedure causes excessive trauma, bone and muscle dissection, and further poor patient recovery and inadequate mobility. Orthoserve have developed their concept - STEM-X, a non-implant specific surgical femoral stem extraction system that is capable of removing failed non-cemented prostheses with minimal bone loss in 30-40 minutes (total procedure time 1.5 hours). The proposed technology must be: (1) simple, easy-to-use, produce repeatable results; (2) gives rise to minimal muscle dissection, blood-loss & bone-loss; (3) reduce the time patient under anaesthetic; (4) insure minimal operative time & surgical costs; (5) non-implant specific; and (4) allows for earlier patient discharge/recovery & better post-operative mobility, reducing the need for further follow-up surgery. Finally the system allows for the replacement implant to be one size up from the one removed avoiding the need for bespoke and high cost implant manufacture. Also, using the STEM-X system will reduce non-cemented HR clinical costs to that of primary THR procedures thereby providing huge savings for the NH and private hospitals.

Total Hip Replacement (known also as Total Hip Arthroplasty - THA) uses anti-biotic medical cement for stem implant fixation; this has been the ’gold’ standard to date. However, cement adhesion is susceptible to loosening and as a consequence stem migration causing adverse pain and discomfort to the patient. Over the last 15 years total joint arthroplasty in 50% of all cases have moved to the use of ‘press fit’ non-cemented prostheses. However, failed noncemented implants are very stubborn and challenging to remove as during Hip Revisional (HR) surgery leading to excessive losses of healthy bone stock. In most cases an Extensive Trochanteric Osteotomy (ETO) procedure is required along with an expensive bespoke replacement implant. An ETO takes approximately 4-5 hours and costs at least 10 times the cost of a primary THR procedure (£6-9,000). An ETO procedure causes excessive trauma, bone and muscle dissection, and further poor patient recovery and inadequate mobility. Orthoserve have developed a laboratory ‘mock-up’ of their concept - STEM-X, a non-implant specific surgical femoral stem extraction system that is capable of removing failed noncemented prostheses with minimal bone loss in 20 minutes. The proposed technology is: (1) simple, easy-to-use, produces repeatable results; (2) gives rise to minimal muscle dissection, blood-loss & bone-loss; (3) reduces the time patient is under anaesthetic; (4) insures minimal operative time & surgical costs; (5) non-implant specific; and (4) allows for earlier patient discharge/recovery & better post operative mobility, reducing the need for further follow-up surgery. Finally the system allows for the replacement implant to be one size up from the one removed avoiding the need for bespoke and expensive implant manufacture. Also, the cost of supplying and using the system in hospitals for HR procedures will cost the same as a primary THR procedure.