String cheese. String instruments. The String Cheese Incident. Shoestring potato chips. Shoestring budget. Tin cans & string. String me right along.
Few people know it, but a tiny piece of string is instrumental to not only accurately installing a crown over a broken or otherwise damaged tooth, but also to steadily piloting a helicopter.
The former requires a dentist to cinch a pre-looped-&-knotted piece of string around the base of what's left of the newly shaved tooth before the temporary plastic crown is installed. She does this, one, to ensure that the soft tissue of the gums doesn't relax around the reshaped tooth, & two, to prevent infection of any kind. Common colors include black.
The latter involves a two- to three-inch piece of string secured to the exterior of the helicopter's bowed windshield along the central seal just about at eye level. The pilot uses this string as a guide, lining it up lengthwise along the windshield's seal to ensure a steady, & safe, flight pattern. Common colors include yellow.
It's not often that professions -- hobbies? -- so dissimilar as dentistry & helicopter piloting line up so neatly. Thank you, small, but mighty, pieces of woven cotton. Thank you.