| Autor: |
A. V. Kolpakov, I. N. Spiridonov, A. L. Makarov |
| Jazyk: |
ruština |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Nauka i Obrazovanie, Vol 0, Iss 11, Pp 444-457 (2014) |
| ISSN: |
1994-0408 |
| Popis: |
The paper concerns the challenging issue of using an infrared (IR) transillumination method for diagnostics of inflammatory diseases in dentistry. The IR transillumination allows detection of the soft and hard periodontal tissues in the near-IR range of wavelengths.The paper presents the research results of the soft periodontal tissues (SPT) transmission factor dependence on the optical probe radiation wavelength.The research has been conducted by modeling the interaction of the optical probe radiation wavelength with normal and inflammatory SPT provided that the inflammatory and normal SPT areas represent optically homogeneous slabs of the finite width.It is found that with the inflammatory progression in SPT a hyperemia area appears. It is the area of the enhanced blood supply due to vasodilatation (hemangiectasis). The hyperemia area is characterized by increased concentration of oxyhemoglobin, hemoglobin, and water. This, in turn, causes a decreasing transmission factor of the inflammatory SPT area on dentist’s examination.It is shown that index of absorption of inflammatory SPT area at the stage of the first injury is defined by a value of the blood absorption index while at the stage of progressing injury SPT is characterized by edema because of increasing water concentration. Therefore the inflammatory SPT area contains slabs of epithelium, blood, and water.It is shown that to detect a SPT injury it is expedient to use the optical probe radiation with the wavelength that allows the maximum difference between the inflammatory and normal SPT areas.The research results based on the models of the optical probe radiation absorption by inflammatory and normal areas of SPT and the transmission factor dependence of SPT on the optical radiation wavelength have shown that the using the IR transillumination with the optical probe radiation wavelength in the range of 800…1050 nm allows the inflammatory areas detection in the soft periodontal tissues at the early stage. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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