{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T14:32:05Z","timestamp":1787495525944,"version":"build-2736575974"},"reference-count":26,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2001,6,1]],"date-time":"2001-06-01T00:00:00Z","timestamp":991353600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Dent Res"],"published-print":{"date-parts":[[2001,6]]},"abstract":"<jats:p>High-resolution synchrotron radiation computed tomography (SRCT) and small-angle x-ray scattering (SAXS) were performed on normal and dentinogenesis imperfecta type II (DI-1I) teeth. The SRCT showed that the mineral concentration was 33% lower on average in the DI-II dentin with respect to normal dentin. The SAXS spectra from normal dentin exhibited low-angle diffraction peaks at harmonics of 67.6 nm, consistent with nucleation and growth of the apatite phase within gaps in the collagen fibrils (intrafibrillar mineralization). In contrast, the low-angle peaks were almost non-existent in the DI-II dentin. Crystallite thickness was independent of location in both DI-II and normal dentin, although the crystallites were significantly thicker in DI-II dentin (6.8 nm [SD = 0.5] vs. 5.1 nm [SD = 0.6]). The shape factor of the crystallites, as determined by SAXS, showed a continuous progression in normal dentin from roughly one-dimensional (needle-like) near the pulp to two-dimensional (plate-like) near the dentin-enamel junction. The crystallites in DI-II dentin, on the other hand, remained needle-like throughout. The above observations are consistent with an absence of intrafibrillar mineral in DI-II dentin.<\/jats:p>","DOI":"10.1177\/00220345010800061501","type":"journal-article","created":{"date-parts":[[2009,1,8]],"date-time":"2009-01-08T19:39:42Z","timestamp":1231443582000},"page":"1555-1559","source":"Crossref","is-referenced-by-count":61,"title":["Intrafibrillar Mineral May be Absent in Dentinogenesis Imperfecta Type II (DI-II)"],"prefix":"10.1177","volume":"80","author":[{"given":"J.H.","family":"Kinney","sequence":"first","affiliation":[{"name":"Department of Preventive and Restorative Dental Sciences, University of California, Box 0758, 707 Parnassus Avenue, San Francisco, CA 94143-0758,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.A.","family":"Pople","sequence":"additional","affiliation":[{"name":"Stanford Synchrotron Radiation Laboratory, Stanford, 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