It was reported to (b)(4) that on (b)(6) 2015, an x-ray unit (jb-70 intraoral dental x-ray system, serial # (b)(4)) separated from its wall mount in a user facility.No injuries were reported.Because the unit was re-installed before the (b)(4) representative visited the user facility, the mounting site was not able to be inspected.However, photographs show that there is continuous wallpaper at the site of mounting, which indicates that at the time of installation, the wall had not been opened to visualize the stud and that the "installation guide" tool had not been used.Because the installation instructions require that the stud be located visually through opening the wall using the installation guide, root cause of the mounting failure is determined to be improper installation, based on the available information.
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