The use of three-dimensional (3D) printing to manufacture off-the-shelf titanium acetabular cups for hip arthroplasty has increased; however, the impact of this manufacturing technology is yet not fully understood. Although several studies have described the presence of structural cavities in 3D printed parts, there has been no analysis of full postproduction acetabular components. The aim of this study was to investigate the effect of 3D printing on the material structure of acetabular implants, first comparing different designs of 3D printed cups, second comparing 3D printed with conventionally manufactured cups. Two of the 3D printed cups were produced using electron beam melting (EBM), one using laser rapid manufacturing (LRM). The investigation was performed using X-ray microcomputed tomography, imaging both the entire cups and samples sectioned from different regions of each cup. All 3D printed cups showed evidence of structural cavities; these were uniformly distributed in the volume of the samples and exhibited a prevalent spherical shape. The LRM-manufactured cup had significantly higher cavity density (p = .0286), with a median of 21 cavities/mm(3) compared to 3.5 cavities/mm(3) for EBM cups. However, the cavity size was similar, with a median of 20 mu m (p = .7385). The conventional cups showed a complete absence of distinguishable cavities. The presence of cavities is a known limitation of the 3D printing technology; however, it is noteworthy that we found them in orthopedic implants used in patients. Although this may impact their mechanical properties, to date, 3D printed cups have not been reported to encounter such failures.
机构:
Univ Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94143 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Bozic, Kevin J.
Kurtz, Steven M.
论文数: 0引用数: 0
h-index: 0
机构:
Exponent Inc, Philadelphia, PA 19104 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Kurtz, Steven M.
Lau, Edmund
论文数: 0引用数: 0
h-index: 0
机构:
Exponent Inc, Menlo Pk, CA 94025 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Lau, Edmund
Ong, Kevin
论文数: 0引用数: 0
h-index: 0
机构:
Exponent Inc, Philadelphia, PA 19104 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Ong, Kevin
Vail, Thomas P.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94143 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Vail, Thomas P.
Berry, Daniel J.
论文数: 0引用数: 0
h-index: 0
机构:
Mayo Clin, Dept Orthopaed Surg, Rochester, MN 55905 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
机构:
Stellenbosch Univ, CT Scanner Facil, PO Sauer, ZA-7602 Stellenbosch, South AfricaStellenbosch Univ, CT Scanner Facil, PO Sauer, ZA-7602 Stellenbosch, South Africa
机构:
Univ Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94143 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Bozic, Kevin J.
Kurtz, Steven M.
论文数: 0引用数: 0
h-index: 0
机构:
Exponent Inc, Philadelphia, PA 19104 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Kurtz, Steven M.
Lau, Edmund
论文数: 0引用数: 0
h-index: 0
机构:
Exponent Inc, Menlo Pk, CA 94025 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Lau, Edmund
Ong, Kevin
论文数: 0引用数: 0
h-index: 0
机构:
Exponent Inc, Philadelphia, PA 19104 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Ong, Kevin
Vail, Thomas P.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94143 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
Vail, Thomas P.
Berry, Daniel J.
论文数: 0引用数: 0
h-index: 0
机构:
Mayo Clin, Dept Orthopaed Surg, Rochester, MN 55905 USAUniv Calif San Francisco, Dept Orthopaed Surg, San Francisco, CA 94143 USA
机构:
Stellenbosch Univ, CT Scanner Facil, PO Sauer, ZA-7602 Stellenbosch, South AfricaStellenbosch Univ, CT Scanner Facil, PO Sauer, ZA-7602 Stellenbosch, South Africa