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Special Report The 46th Annual Meeting of the Japanese Society for Replacement Arthroplasty This article describes the poster presentation made about Shimadzu tomosynthesis. Clinical utility of T-smart tomosynthesis for micro MAX stem total hip arthroplasty Department of Orthopedic Surgery, Kainan Hospital1, Department of Arthroplastic Medicine, Nagoya City University2 Yoshihiro Shibata1, Isato Sekiya1, Naoya Takada1, Yuka Mukofujiwara1, Yoshikazu Hayashi1, Yasuhiro Katsuda1, Akira Kondo1, and Hirotaka Iguchi2 1. Purpose The Revelation microMAX stem (Fig. 1) is a cementless short stem with a lateral flare design that allows for proximal physiological load transmission. T-smart (Tomosynthesis-Shimadzu Metal Artifact Reduction Technology) tomosynthesis reduces artifacts near metal objects and enable clearer visualization of the peri-implant trabecular structure, which provide beneficial images for confirming implant fixation status. We believe that T-smart tomosynthesis is useful for estimating the condition of microMAX stem fixation and hereby report on observation of the postoperative course of microMAX stem. Multiple sectional images are reconstructed with limited angle range scanning by using a at panel detector (FPD). Advantages: Provides images with higher spatial resolution and fewer metal artifacts than CT images. reactive radiodense lines Revelation stem Revelation microMAX stem DJO Surgical Products (DJO Global Inc.) spot welds 2. Materials and Methods Subjects comprised 19 patients (20 hips) who underwent THA using microMAX stem between July 2012 and November 2014. The subjects included 7 males and 12 females with a mean age of 67 (ranging from 38 to 83 years). Four patients had femoral head necrosis and 15 patients had osteoarthritis of the hip. The mean duration of follow-up is 16.4 months (ranging from 3 to 33 months). No.81 (2017.3) prominent reactive line

Clinical utility of T-smart tomosynthesis for micro MAX stem total hip arthroplasty Based on X-ray and T-smart tomosynthesis images (Fig. 2) obtained for all cases to determine the incidence and distribution of spot welds, and the incidence of reactive radiodense lines and prominent reactive lines (Fig. 3). The incidence and distribution of spot welds and the incidence of reactive radiodense lines and prominent reactive lines in X-ray and T-smart tomosynthesis images are shown in Fig.4. No stem loosening was noted in any of the cases. Because tomosynthesis provides higher spatial resolution...