Kite Measurement Technique for Enhanced Accuracy and Technical Proficiency of Graft Preparation in Segmental Labral Reconstruction of the Hip.

Preserving labral integrity has become a guiding principle in hip preservation surgery given the recent understanding of the importance of the acetabular labral suction seal. When labral tissue is deficient, a labral reconstruction may be indicated to re-create the suction seal and improve hip biomechanics. One of the main challenges of segmental labral reconstruction techniques is obtaining an accurate measurement of the defect because incorrect sizing of the graft could result in incomplete restoration of the labral seal or an oversized graft that requires amputation. In this report, we present a kite measurement technique that allows for easy, accurate measurement of the segmental defect during segmental labral reconstruction.

Two hydration products of 3,4,5,6-tetrachloro-N-(methyl-2-pyridyl)phthalmic acids.

In 2-amino-6-methylpyridin-1-ium 2-carboxy-3,4,5,6-tetrachlorobenzoate, C(6)H(9)N(2)(+)·C(8)HCl(4)O(4)(-), there are two perpendicular chains of hydrogen-bonded ions, one arising from the interaction between 2-carboxy-3,4,5,6-tetrachlorobenzoate ions and the other from the interaction between the 2-amino-6-methylpyridin-1-ium and 2-carboxy-3,4,5,6-tetrachlorobenzoate ions. These chains combine to form a two-dimensional network of hydrogen-bonded ions. Cocrystals of bis(2-amino-3-methylpyridin-1-ium) 3,4,5,6-tetrachlorophthalate-3,4,5,6-tetrachlorophthalic acid (1/1), 2C(6)H(9)N(2)(+)·C(8)Cl(4)O(4)(2-)·C(8)H(2)Cl(4)O(4), form finite aggregates of hydrogen-bonded ions. π-π interactions are observed between 2-amino-3-methylpyridin-1-ium cations. Both structures exhibit the characteristic R(2)(2)(8) motif as a result of the hydrogen bonding between the 2-aminopyridinium and carboxylate units.