| 摘要 |
An interproximal toothbrush comprises an elongated metal handle terminating at one end in a threaded section. The stem of a twisted wire brush passes through a hole in said threaded section, humps up above the threads, and then passes down into a groove in the handle. A nut travels on the threads until it encounters and seizes upon the hump in the twisted wire. This way, the brush is securely locked into position, but the nut never touches the stem in the area of the brush. Thus, the brush is not damaged by the locking nut. A second hole in the handle receives a toothpick.
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