 As long as 3000 B.C., the ancient Egyptians constructed crude toothbrushes from twigs and leaves to clean their teeth.
<meaning-changed>  As long as 3000 B.C., the ancient Egyptians constructed crude toothbrushes from twigs and leaves to clean their teeth.
 Teeth-cleaning twigs have long been used throughout human history. As long ago as 3000 B.C., the ancient Egyptians constructed crude toothbrushes from twigs and leaves to clean their teeth.