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· DOS Abstracts
Accuracy of custom pelvic tumor resection and
reconstruction with patient-specific resection
guides and matching implant scaffolds
Werner Hettwer, Andreas Krieg, Michael Mørk Petersen, Fritz Hefti
Ortopedisk Tumorsektion, Rigshospitalet; Childrens Hospital, University of
Basel, Switzerland; Ortopedisk Tumorsektion, Rigshospitalet; Childrens Hospital,
Univsersity of Basel, Switzerland
Background:
Adequate resection and reconstruction of pelvic tumors can be
very challenging. Complex anatomy and limited exposure can make safe and ap-
propriate placement of resection lines difficult and subsequent endoprosthetic
reconstruction demanding. Recent technological advances now permit virtual
planning and production of complex patient- specific resection guides and pa-
tient- specific implant scaffolds prior to the intervention.
Purpose / Aim of Study:
To report our experience with 5 cases of periace-
tabular tumors where resection and reconstruction were accomplished utilizing
pre-operatively manufactured, specifically designed resection guides and cor-
responding composite implants consisting of a precisely matching and defect
specific titanium scaffold as well as integrated plates to provide for immediate
stable fixation and subsequent opportunity for ingrowth into the residual bone.
Materials and Methods:
Accuracy for each osteotomy plane was determined
by direct intraoperative measurement and independent assessment of histo-
pathological margin status. VIrtual analysis of postoperative CT scans was per-
formed in two cases.
Findings / Results:
We report our experience with 5 cases of periacetabu-
lar tumors where resection and reconstruction were accomplished utilizing
pre-operatively manufactured, specifically designed resection guides and cor-
responding composite implants consisting of a precisely matching and defect
specific titanium scaffold as well as integrated plates to provide for immediate
stable fixation and subsequent opportunity for ingrowth into the residual bone.
Conclusions:
This technology appears to afford high intraoperative accuracy,
surgeon confidence and decreased operative time and is certain to develop into
a promising treatment option for complex pelvic tumors in the future.
Conflicts of Interest
Werner Hettwer; BONESUPPORT AB
139.