Ultrastructural analysis of the submandibular sialoliths: Raman spectroscopy and electron back-scatter studies

Area of Science:

• Oral and Maxillofacial Surgery
• Pathology
• Biomaterials Science

Background:

• Sialolithiasis, the formation of salivary stones, commonly affects the submandibular gland.
• Understanding the epidemiology and ultrastructure of these stones is crucial for diagnosis and treatment.
• Previous epidemiological data on sialolithiasis is limited in its scope and recent updates.

Purpose of the Study:

• To conduct an epidemiological analysis of submandibular gland sialolithiasis in adults.
• To evaluate the ultrastructure and composition of salivary stones (sialoliths).
• To correlate findings with established theories of sialolithiasis formation.

Main Methods:

• Epidemiological analysis of adult patients diagnosed with sialolithiasis.
• Ultrastructural examination of 44 sialoliths using Scanning Electron Microscopy (SEM).
• Chemical composition analysis using Raman Spectroscopy.

Main Results:

• The epidemiology of sialolithiasis has shown no significant changes over the past 50 years.
• A diverse range of sialolith structures was observed: 75% exhibited a layered structure, while 25% had a homogeneous structure.
• Varied distributions of organic and inorganic components were noted within the sialoliths.

Conclusions:

• The findings support the dual etiology of sialolithiasis: inflammation and precipitation due to disrupted saliva flow.
• SEM and Raman Spectroscopy provide insights into the complex structure and composition of salivary stones.
• Further research may refine the understanding of sialolithiasis pathogenesis and inform therapeutic strategies.