Intermittent Crystal Growth of Unusually Long Submandibular Sialolith Revealed by Micro-Focus- and Selected-Area-X-Ray Diffraction.

DOI Web Site 被引用文献2件 参考文献13件
  • SAKAE Toshiro
    Department of Oral Histology, Nihon University School of Dentistry at Matsudo
  • AKIMOTO Yoshiaki
    Department of Oral Surgery, Nihon University School of Dentistry at Matsudo
  • KANEDA Takashi
    Department of Radiology, Nihon University School of Dentistry at Matsudo
  • FUJII Akira
    Department of Pharmacology, Nihon University School of Dentistry at Matsudo
  • UTSUNOMIYA Tadahiko
    Department of Oral Pathology, Nihon University School of Dentistry at Matsudo
  • YAMAMOTO Hirotsugu
    Department of Oral Pathology, Nihon University School of Dentistry at Matsudo
  • HARADA Takaatsu
    Department of Oral Surgery, Nihon University School of Dentistry at Matsudo
  • HiGUCHI Kazuo
    Department of Oral Surgery, Nihon University School of Dentistry at Matsudo
  • SATO Seiichi
    Department of Oral Surgery, Nihon University School of Dentistry at Matsudo
  • Racquel.Z. LeGeros
    Department of Biomaterials and Biomimetics, New York University College of Dentistry

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BACKGROUND: Sialolith is a pathological calcification found inside salivary glands, composed principally of apatite crystals. The purpose of this study was to investigate detailed structural properties to gain insight into the formation of sialolith. METHODS: A 45 mm long sialolith from a human submandibular gland was studied using micro-FTIR and three types of X-ray diffraction (XRD) techniques: i) conventional, ii) micro-focus, and iii) “selected-area XRD” (SA-XRD). RESULTS: The longitudinal section of the sialolith showed a stratified structure perpendicular to the long axis. XRD and FTIR showed that the bulk of the sialolith was composed of carbonate hydroxyapatite. Micro-XRD revealed that crystal orientation was slightly different in each incremental zone. “SA-XRD” showed that the average unit cell dimensions of apatite crystals were different for each zone. CONCLUSION: These results suggest that the stratified structure in the sialolith was a result of intermittent and incremental additional growth reflecting compositional changes in the microenvironment.

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