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Mutations01:39

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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Updated: Apr 14, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
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Radiation-related damage to dentition.

Andrej M Kielbassa1, Wolfgang Hinkelbein, Elmar Hellwig

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Radiotherapy for head and neck cancers causes severe oral health issues like dry mouth and radiation caries. Dental professionals must actively manage these complications to preserve patients' quality of life.

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Area of Science:

  • Oncology
  • Radiotherapy
  • Oral Medicine

Background:

  • Radiotherapy in the head and neck region frequently leads to oral complications affecting salivary glands, mucosa, bone, and dentition.
  • High radiation doses can cause hyposalivation, mucositis, taste loss, trismus, and osteoradionecrosis.

Purpose of the Study:

  • To review the multifactorial causes of radiation caries.
  • To present treatment strategies for preventing tooth loss in patients undergoing radiotherapy.

Main Methods:

  • Literature review focusing on the oral side effects of radiotherapy.
  • Analysis of the causes and management of radiation-induced dental caries.

Main Results:

  • Hyposalivation is often irreversible, while mucositis and taste loss are typically reversible post-irradiation.
  • Radiation caries presents a lifelong risk, characterized by rapid onset and potential for osteonecrosis.

Conclusions:

  • The dental profession's early involvement is crucial for preventive and therapeutic strategies.
  • Active patient education and rehabilitation are essential for maintaining quality of life during and after radiotherapy.