Postoperative stability following a triple pelvic osteotomy is affected by implant configuration: a finite element analysis

Hedelin, Henrik,1975Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för ortopedi,Institute of Clinical Sciences, Department of Orthopaedics,University of Gothenburg,Sahlgrenska universitetssjukhuset,Sahlgrenska University Hospital (author)

Background The triple pelvic osteotomy is an established surgical method with multiple modifications regarding surgical technique and choice of implant. The stability of the osteotomy is affected by numerous factors, and among these, the three-dimensional implant configuration is a scientifically less explored aspect. Methods We used a finite element model of a hemi-pelvis with a standardized triple osteotomy to calculate relative flexibility for loads in all translational degrees of freedom for five different implant configurations. Two of the configurations used entry points only feasible when implant removal was not necessary. Results The stability of the osteotomy improved with an increased distance between the implants in the plane of the osteotomy as well as for a more perpendicular angle relative to the osteotomy plane. The implant configurations with more entry points available made this easier to adhere to. Conclusion The use of bioabsorbable implants may provide better opportunities for optimal implant constructs which can, to a certain degree, compensate for the lesser mechanical stiffness of bioabsorbable polymers as compared to metal implants.

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Ortopedi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Orthopaedics hsv//eng
TEKNIK OCH TEKNOLOGIER Medicinteknik Medicinsk bildbehandling hsv//swe
ENGINEERING AND TECHNOLOGY Medical Engineering Medical Image Processing hsv//eng
Osteotomy
Acetabulum
Fixation
Bioabsorbable screw
Finite element
analysis
calve-perthes disease
periacetabular osteotomy
innominate osteotomy
advanced containment
fixation
model
optimization
validation
screws
Orthopedics
Finite element analysis

Brynskog, Erik,1989Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)erikeli (author)
Larnert, PerGothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för ortopedi,Institute of Clinical Sciences, Department of Orthopaedics,University of Gothenburg,Sahlgrenska universitetssjukhuset,Sahlgrenska University Hospital(Swepub:gu)xlarnp (author)
Iraeus, Johan,1973Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)iraeus (author)
Laine, TeroGothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för ortopedi,Institute of Clinical Sciences, Department of Orthopaedics,Sahlgrenska universitetssjukhuset,Sahlgrenska University Hospital,University of Gothenburg (author)
Lagerstrand, Kerstin MGothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper,Institute of Clinical Sciences,University of Gothenburg,Sahlgrenska universitetssjukhuset,Sahlgrenska University Hospital(Swepub:gu)xlagke (author)
Göteborgs universitetInstitutionen för kliniska vetenskaper, Avdelningen för ortopedi (creator_code:org_t)

In:Journal of Orthopaedic Surgery and Research: Springer Science and Business Media LLC17:11749-799X

By the author/editor: Hedelin, Henrik, ...; Brynskog, Erik, ...; Larnert, Per; Iraeus, Johan, 1 ...; Laine, Tero; Lagerstrand, Ker ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Orthopaedics

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...; and Medical Image Pr ...

By the university: University of Gothenburg; Chalmers University of Technology

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