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The supraclavicular flap is an important method for the reconstruction of the neck. In this study, the authors attempted to clarify the mechanism of blood flow into the supraclavicular flap based on the thoracic branch of the supraclavicular artery. Additionally, the authors discuss the clinical application of such anatomy. Thirty fresh cadavers and 13 preserved cadavers were dissected to observe the anatomic features of the pectorally extended supraclavicular flap. Additionally, 46 clinical cases were treated with such a flap. We identified two branches of the supraclavicular artery. A deltoid branch that extended to the acromial region and a thoracic branch that traveled to the anterior thoracic region. Using these data, all such flaps operated by us have to date, survived with satisfactory results. The pectorally extended supraclavicular flap could be used to repair defects on the ipsilateral or contralateral face, neck, and anterior thorax.

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Diamond and cubic boron nitride (cBN) as conventional superhard materials have found widespread industrial applications, but both have inherent limitations. Diamond is not suitable for high-speed cutting of ferrous materials due to its poor chemical inertness, while cBN is only about half as hard as diamond. Because of their affinity in structural lattices and covalent bonding character, diamond and cBN could form alloys that can potentially fill the performance gap. However, the idea has never been demonstrated because samples obtained in the previous studies were too small to be tested for their practical performance. Here, we report the synthesis and characterization of transparent bulk diamond-cBN alloy compacts whose diameters (3 mm) are sufficiently large for them to be processed into cutting tools. The testing results show that the diamond-cBN alloy has superior chemical inertness over polycrystalline diamond and higher hardness than single crystal cBN. High-speed cutting tests on hardened steel and granite suggest that diamond-cBN alloy is indeed a universal cutting material.

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