1. Early fracture of the modular neck of a MODULUS femoral stem
Katsufumi Uchiyama, MD, PhD, Takeaki Yamamoto, MD, PhD, Mitsutoshi Moriya, MD, Kensuke Fukushima, MD, Yojiro Minegishi, MD, Naonobu Takahira, MD, PhD, Masashi Takaso, MD, PhD 
Arthroplasty Today 
Volume 3, Issue 2, Pages (June 2017)
DOI: /j.artd
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2. Figure 1
Radiographic examination of the patient’s left total hip arthroplasty at 3 years and 8 months postoperatively showing a fracture of the modular neck component.
Arthroplasty Today 2017 3, 93-98DOI: ( /j.artd )
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3. Figure 2 Picture of the broken components after retrieval.
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4. Figure 3
Intraoperative picture of the tapered portion of the proximal stem with evidence of scalloping and pitting.
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5. Figure 4
Immediate postoperative radiographic control image after revision of the broken components.
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6. Figure 5
Pictures of the neck fracture surfaces (left: inferior fragment from the top; right: inferior fragment from the side). We identified the anterior, medial, posterior, and lateral zones of the neck with the letters A, M, P, and L, respectively. The letters I and S denote the inferior and superior parts of the neck fragments, respectively.
Arthroplasty Today 2017 3, 93-98DOI: ( /j.artd )
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7. Figure 6
Broken screw (right: fracture surface of the superior screw fragment).
Arthroplasty Today 2017 3, 93-98DOI: ( /j.artd )
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8. Figure 7 SEM analysis of the fractured surfaces of the neck.
Arthroplasty Today 2017 3, 93-98DOI: ( /j.artd )
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9. Figure 8 SEM analysis of the fractured surfaces of the screw.
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10. Figure 9
FEA of the involved components showing the stress distribution for a 13-mm neck and a 125° stem at 2400 N.
Arthroplasty Today 2017 3, 93-98DOI: ( /j.artd )
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11. Figure 10
FEA of the involved components showing the stress distribution for a 15-mm neck and a 125° stem at 2600 N.
Arthroplasty Today 2017 3, 93-98DOI: ( /j.artd )
Copyright © 2016 The Authors Terms and Conditions