Teeth resorption

Internal resorption
 * A pathological process in which the roots of permanent teeth are resorbed.
 * We distinguish:
 * 1) Internal resorption (starts inside the tooth from the pulp side);
 * 2) * causes: pulpitis chronica clausa, does not cause problems.
 * 3) External resorption (begins on the outer surface of the root from the periodontium);
 * 4) * causes: periapical inflammations, tumors, cysts, retained teeth, replanted teeth
 * is caused by a chronic inflammatory process (pulpitis chronica granulomatosis interna)
 * the resulting granulation tissue resorbs the surrounding dentin and cementum
 * if it is in the neck --> typical sign - 'pink spot
 * Therapy:
 * endodontic treatment
 * temporary filling made of Ca(OH)2 or other bioactive materials (MTA, Biodentine,...)

External resorption
 * external resorption generally occurs as a result of damage to the periodontal ligaments (whether mechanical, chemical or biological)
 * the surrounding tissue reacts to this stimulus, it tries to break down the damaged tissue
 * as part of this, TZT will also be resorbed
 * subclassification:
 * replacement resorption
 * resorbed TZT are replaced by bone that grows into them
 * a solid dentin-bone connection is formed = ankylosis
 * inflammatory resorption
 * cause - from dentin (necrosis, infection)
 * toxins reach the periodontium through the dentinal tubules
 * granulation tissue is formed
 * followed by resorption
 * invasive cervical resorption
 * starts from cells below the epithelial attachment
 * cells resorb the cervical region of the tooth
 * we distinguish 4 types according to severity
 * surface resorption
 * e.g. as a result of orthodontic treatment
 * in the area of the pressure zone, hyaline necrosis of periodontal vessels will occur as a result of excessive pressure
 * surrounding tissue reacts to necrosis
 * the result is minor resorption visible on the root of the tooth
 * pressure resorption
 * due to excessive occlusal forces
 * idiopathic resorption
 * for an unknown reason
 * Therapy
 * depends on the extent of the defect and location
 * if it is a small defect in the neck area
 * extirpation of granulation tissue
 * Ca(OH)2 or other bioactive material
 * Emdogain
 * in the apex area
 * tip resection possible
 * otherwise we can try endodontic treatment and hope

Links
https://www.slideshare.net/UDDent/root-resorption-stdntcopy

https://www.researchgate.net/figure/Classification-of-root-resorption-A-Replacement-resorption-The-root-is-resorbed-and_fig1_225830442

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