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Conservative Management of External Replacement Resorption in a Posterior Tooth: A Case Report
Merin Alphonsa Johnson1, Asha Joseph1, Anju Varughese1
1Department of Conservative Dentistry and Endodontics, Amrita Vishwa Vidyapeetham, Amrita School of Dentistry, Kochi, IND.
Cureus
|November 28, 2025
Summary
External replacement resorption (ERR) is a rare but aggressive condition where bone replaces tooth roots. Early diagnosis and conservative endodontic treatment with bioactive materials can successfully preserve affected teeth.
Area of Science:
- Dentistry
- Endodontics
- Oral Surgery
Background:
- External replacement resorption (ERR) is an uncommon, aggressive root resorption where bone replaces the root after periodontal ligament damage.
- Progression is often silent, potentially leading to tooth loss, making early recognition critical.
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The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.