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However, the most urgent problem is without an effective prosthesis and standard treatment strategy. In order to resolve these problems, this study was performed to explore the use of a 3D\u2010printed anatomically conforming pelvic prosthesis for bony defect reconstruction following tumor resection and to describe a detailed treatment flowchart and the selection of a surgical approach. Six patients aged 48\u201069 years who had undergone pelvic tumor resection underwent reconstruction using 3D\u2010printed anatomically conforming pelvic prostheses according to individualized bony defects between March 2016 and June 2018. According to the Enneking and Dunham classification, two patients with region I+II tumor involvement underwent reconstruction using the pubic tubercle\u2010anterior superior iliac spine approach and the lateral auxiliary approach and one patient with region II+III and three patients with region I+II+III tumor involvement underwent reconstruction using the pubic tubercle\u2010posterior superior iliac spine approach. The diagnoses were chondrosarcoma and massive osteolysis. After a mean follow\u2010up duration of 30.33 \u00b1 9.89 months (range, 18\u201042), all patients were alive, without evidence of local recurrence or distant metastases. The average blood loss and blood transfusion volumes during surgery were 2500.00 \u00b1 1461.51\u2009ml (range, 1200\u20105000) and 2220.00 \u00b1 1277.62\u2009<jats:italic>m<\/jats:italic><jats:italic>l<\/jats:italic> (range, 800\u20104080), respectively. During follow\u2010up, the mean visual analogue scale (VAS) score decreased, and the mean Harris hip score increased. There were no signs of hip dislocation, prosthetic loosening, delayed wound healing, or periprosthetic infection. This preliminary study suggests the clinical effectiveness of 3D\u2010printed anatomically conforming pelvic prostheses to reconstruct bony defects and provide anatomical support for pelvic organs. A new surgical approach that can be used to expose and facilitate the installation of 3D\u2010printed prostheses and a new treatment strategy are presented. Further studies with a longer follow\u2010up duration and larger sample size are needed to confirm these encouraging results.<\/jats:p>","DOI":"10.1155\/2020\/8513070","type":"journal-article","created":{"date-parts":[[2020,12,1]],"date-time":"2020-12-01T19:53:40Z","timestamp":1606852420000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":35,"title":["Reconstruction of Bony Defects after Tumor Resection with 3D\u2010Printed Anatomically Conforming Pelvic Prostheses through a Novel Treatment 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