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to insert the guide pin into the femoral head. We measured the femoral component angle inthree dimensions using the 3D processing software postoperatively. We compared the differenceof this angle and the pre-operative planed angles. We also investigated the operation time, thevolume of bleeding during operation and complications.(Results)The mean femoral neck angle is 131.9±7.2°.The mean femoral component angle in AP view is142.5±5.4°. The mean femoral component angle in lateral view is 0.1±1.2°. The meancalculated difference in AP view is 3.5±2.8°. And the mean calculated difference in lateral viewis 0.9±0.7°. The mean operation time was 120±25 minutes. The mean volume of bleeding was401±325ml. No major complication was noted.(Discussion)By planning three-dimensional, it was possible to make an accurate preoperative planning.Though it is a very preliminary report with a small number of cases, we are encouraged tocontinue this procedure from this data. An application of PST for implanting femoralcomponent in resurfacing THA brought us an accurate implanting as planned. This technique donot prolong an operation time, cost less and can be done with less invasions compared with anavigation system.Saturday, October 9, 2010, 10:20-11:05Session A19: Miscellaneous ArthroplastyMassive Endoprosthetic Replacement for Forearm Tumours: OurExperience at Stanmore*Azal Jalgaonkar - Royal National Orthopaedic Hospital Stanmore - Stanmore, UnitedKingdomAnita Mohan - Royal National Orthopaedic Hospital - Stanmore, United KingdomDerek Park - Royal National Orthopaedic Hospital - Stanmore, United KingdomSebastian Dawson-Bowling - Royal National Orthopaedic Hospital - Stanmore, UnitedKingdomWill Aston - Royal National Orthopaedic Hospital - Stanmore, United KingdomSteve Cannon - Royal National Orthopaedic Hospital - London, UKJohn Skinner - Royal National Orthopaedic Hospital Trust - Stanmore, UKTim Briggs - . - London, UK*Email: azal4u@doctors.net.ukThere is very limited literature available on the use of prosthetic replacement in the treatment ofprimary and secondary tumours of the radius. In the past these were treated with vascularisedand non-vascularised autografts which had associated donor site morbidity, problems of nonunion, graft or junctional fractures and delayed return to function. Our study is a mid to longterm follow-up of implant survivorship and the functional outcome of metal prostheticreplacement used for primary and metastatic lesions of radius. We had 15 patients (8 males:7females) with a mean age of 53 years. 8 patients underwent proximal radial replacement, 2 withfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]