straightening

Straightening refers to processes that remove curvature, warp, or distortion to achieve a straight form. It is used across diverse fields, including personal grooming, dentistry, and manufacturing, to improve function, fit, or appearance.

In hair care, straightening reduces curl or wave. Methods include heat styling with flat irons; chemical straightening such as relaxers that permanently alter hair structure; and protein-based keratin treatments or similar products that temporarily smooth. Results vary in durability and may require special care to avoid damage.

In orthodontics, straightening refers to moving teeth into proper alignment using braces, aligners, or other appliances. It improves bite function and aesthetics. Treatments progress over months to years, and may be accompanied by hygiene and retainer use after completion. Risks include discomfort and occasional root or tooth movement beyond intended positions.

In manufacturing, straightening corrects distortions from bending or forming processes. Methods include mechanical straightening with rollers, clamps, and presses; and heating for materials sensitive to work hardening. Pipes and tubes may be straightened with mandrels or specialized machines. Quality control uses straightedges, gauges, or laser-based systems to verify tolerance.

Overall, straightening encompasses a range of techniques selected for material, context, and required durability.