title: Opening wedge high tibial osteotomy using 3D biomodelling Bonelike macroporous structures: case report.
abstract: Two synthetic calcium phosphates in porous wedge shape, Bonelike and a commercial HA/beta-TCP biphasic material, were used as an alternative to bone autografts and allografts in the treatment of medial compartment osteoarthritis of varus knees. The structure of Bonelike has a 3D architecture that is computer controlled, and a composition that mimics the mineral composition of natural bone. The HA/beta-TCP biphasic material used as a control material in this study was prepared using conventional foaming based methods. No signs of inflammatory reactions were observed post-operatively for both materials. After 4 months signs of fusion at the osteotomy site and good integration of the implanted wedges were observed, showing good mechanical resistance. Concerning the final correction attained, the left knee revealed a satisfactory valgus of 10 degrees , but the right one only had a final value of 6 degrees . The clinical evaluation using International Knee Score (IKS) showed good outcome in all parameters with complete range of motion in both knees and climbing stairs without crutches with only slight pain.
authors.affiliation: FMUP - Faculdade de Medicina da Universidade do Porto, Hospital de São João, Largo Hernâni Monteiro, Porto 4200, Portugal.
authors.forename: M
authors.initials: M
authors.lastname: Gutierres
authors.forename: A G
authors.initials: AG
authors.lastname: Dias
authors.forename: M A
authors.initials: MA
authors.lastname: Lopes
authors.forename: N Sooraj
authors.initials: NS
authors.lastname: Hussain
authors.forename: A T
authors.initials: AT
authors.lastname: Cabral
authors.forename: L
authors.initials: L
authors.lastname: Almeida
authors.forename: J D
authors.initials: JD
authors.lastname: Santos
mesh_terms: D018786:Bone Substitutes / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry; D003198:Computer Simulation; D006801:Humans; D006882:Hydroxyapatites / Q000737:chemistry; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D016062:Porosity; D019736:Prostheses and Implants; D011859:Radiography; D013977:Tibia / Q000000981:diagnostic imaging / Q000601:surgery*
chemical_list: D018786:Bone Substitutes; D002130:Calcium Phosphates; D006882:Hydroxyapatites; C094280:hydroxyapatite-tricalciumphosphate composite