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  • Title: The influence of internal stone structure upon the fracture behaviour of urinary calculi.
    Author: Pittomvils G, Vandeursen H, Wevers M, Lafaut JP, De Ridder D, De Meester P, Boving R, Baert L.
    Journal: Ultrasound Med Biol; 1994; 20(8):803-10. PubMed ID: 7863569.
    Abstract:
    In vitro extracoporeal shock wave lithotripsy (ESWL) on different types of urinary calculi, in combination with microfocus x-ray and microphotography, illustrates the importance of the internal stone structure. Calculi with a rough surface layered structure (calcium oxalate monohydrate) and untextured calculi (cystine) are characterized by a low stone fragility, whereas coarse-grain calculi (calcium oxalate dihydrate, struvite), and calculi with a smooth surface layered structure (uric acid), are very fragile. Shell-like fragmentation in layered calculi, with smooth surface of the crystalline laminations, suggests that the stone matrix influenced the propagation of the shock wave energy inside the stone.
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