title: Mathematical principle of planar Z-plasty.
abstract: To extend the work of precursors attempting to use Z-plasties with angles that have arbitrary degrees and may or may not be equal in size, a comprehensive study was done to clarify and simplify the correlation among the angles, limbs, and diagonals of the geometrical construction of Z-plasties. In geometry, the truth of a proposition must be proved; it is a question to which the answer must be found. By law and formula, a ternary trigonometric equation was derived from a simplified geometric diagram by a trigonometric approach. A procedure declaration accompanies this formula; neither was previously mentioned in the literature.
authors.affiliation: Department of Oral Maxillofacial Surgery, Da-Ping Hospital, the Third Military Medical College, Chongqing, China. cjlrich@cta/cq.cn
authors.forename: D Y
authors.initials: DY
authors.lastname: Chu
mesh_terms: D006801:Humans; D008433:Mathematics; D013518:Surgery, Plastic / Q000706:statistics & numerical data*; D013536:Suture Techniques / Q000706:statistics & numerical data*