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Tooth decalcification: A correlation between weight loss in a decalcified tooth with different decalcifying agents
Mohammad Imran Khan1, Abhisheik Khare1, Sameera Shamim Khan1
1Career Post Graduate Institute of Dental Sciences and Hospital, Ghaila, IIM Road, Lucknow, UP, India.
Journal of Oral Biology and Craniofacial Research
|September 19, 2022
Summary
Ethylenediaminetetraacetic acid (EDTA) is the best decalcifying agent for preserving tissue structure, though it takes longer. For faster results, 5% Tri Carboxylic Acid (TCA) is a suitable alternative for tooth decalcification.
Area of Science:
- Biomaterials Science
- Dental Histology
- Tissue Processing
Background:
- Histopathological examination of mineralized tissues, such as teeth, necessitates decalcification.
- This crucial step in tissue processing removes calcium deposits, enabling microscopic analysis.
- Evaluating different decalcifying agents is essential for optimizing tissue preservation and staining efficacy.
Purpose of the Study:
- To compare the efficacy of various decalcifying agents, including strong acids, weak acids, and a chelating agent.
- To assess the impact of these agents on tissue structure preservation and staining quality.
- To correlate the completion of decalcification with percentage weight loss of the tooth.
Main Methods:
- Sixty-four teeth (molars, premolars, canines, incisors) were decalcified using 10% EDTA (chelating agent), 10% HNO₃ (strong acid), 5% Tri Carboxylic Acid (TCA) (weak acid), and Von Ebner's solution.
- Decalcification completion was monitored by time, weight change at set intervals, radiographic, and chemical methods.
- Decalcified teeth were processed, sectioned, stained with Hematoxylin and Eosin, and examined macroscopically and microscopically.
Main Results:
- Decalcification is considered complete at 70-80% weight change.
- 10% EDTA demonstrated superior preservation of soft and hard tissues compared to other agents.
- 5% TCA offered satisfactory staining quality and hard tissue structure preservation, comparable to 10% HNO₃ and Von Ebner's solution.
Conclusions:
- Ethylenediaminetetraacetic acid (EDTA) is the preferred decalcifying agent for optimal tissue preservation when time is not a critical factor.
- For time-constrained situations, 5% Tri Carboxylic Acid (TCA) provides a viable alternative for effective tooth decalcification.
- The study highlights the trade-offs between decalcification speed, tissue preservation, and staining efficacy among different agents.
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