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On the Structural Diversity of Sialoliths

Published online by Cambridge University Press:  28 September 2007

António P. Alves de Matos ,
Patrícia A. Carvalho ,
Arlindo Almeida ,
Luís Duarte ,
Rui Vilar  and
Jorge Leitão
António P. Alves de Matos
Affiliation:
Department of Biomaterials/ITB, Dental Medical School, University of Lisbon, 1649-003 Lisbon, Portugal Anatomic Pathology Department, Curry Cabral Hospital, R. da Beneficência 8, 1069-166 Lisbon, Portugal
Patrícia A. Carvalho
Affiliation:
Department of Materials Engineering, Technical University of Lisbon, 1049-001 Lisbon, Portugal
Arlindo Almeida
Affiliation:
Department of Biomaterials/ITB, Dental Medical School, University of Lisbon, 1649-003 Lisbon, Portugal
Luís Duarte
Affiliation:
Maxilo-Facial Cirurgy Service, S. José Hospital, 1150-199 Lisbon, Portugal
Rui Vilar
Affiliation:
Department of Materials Engineering, Technical University of Lisbon, 1049-001 Lisbon, Portugal
Jorge Leitão
Affiliation:
Department of Biomaterials/ITB, Dental Medical School, University of Lisbon, 1649-003 Lisbon, Portugal
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Abstract

Sialoliths from parotid and submaxillar glands have been characterized. Fractured and polished surfaces revealed an intrinsic structural diversity across the calculi sections. In general, the calculi presented highly mineralized amorphous-looking cores surrounded by concentric alternating mineralized and organic layers. The thickness of these layers decreased from the outer regions toward the center of the sialolith, illustrating a sequence of growth stages. Nevertheless, a significant variability could be detected among the specimens. In some cases, the calculi displayed multiple cores and lacked concentric laminated structures. In other instances, the specimens exhibited extensive regions of globular structures. In these cases, the globule diameter decreased across the radius toward the center of the sialoliths, and the globular structures tended to reorganize, forming bright and dark laminated layers surrounding the core. The participation of globular structures in the layer formation process points to morphogenetic mechanisms not previously described.

Keywords

salivary calculisialolithsconchoidal fracturelaminated structuressulfurglobular structures
Type
BIOLOGICAL APPLICATIONS
Information
Microscopy and Microanalysis , Volume 13 , Issue 5 , October 2007 , pp. 390 - 396
Copyright
© 2007 Microscopy Society of America

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