Root resorption

Introduction:• Root resorption is a condition associated with either a

physiologic or a pathologic process resulting in a loss of dentin, cementum and/or bone

• It may be initiated in the periodontium and affect initially the external surfaces of the tooth (external resorption) or it may start within the pulp space affecting primarily the internal dentin surfaces (internal resorption).

• With the exception of minor, transient surface resorption, loss of tooth structure is irreversible.

• Treatment, when successful, can only arrest the process and when less successful, slow down resorption.

• If not diagnosed and treated, that can lead to tooth extraction.

• The etiology of root resorption requires two phases: Injury and Stimulation

• The injury is similar to several types of root resorption

• Injury is related to the non-mineralized tissues covering the external surface of the root, the precementum, or internal surface of the root canal, the predentin.

Types:• Internal resorption :o Infection relatedo replacement

• External resorption : o Surface o Inflammatoryo Replacement resorptiono Spontaneous ankylotico Multiple sites of ankylotic or infected

• Cervical Invasive resorption

• A clinical-related classification of root resorption that will assist in diagnosis and treatment of the pathological process.

• Pulpal infection root resorption• Periodontal infection root resorption • Orthodontic pressure root resorption • Impacted tooth or tumor pressure root resorption • Ankylotic root resorption