Root Resorption due to Dental Trauma

Protective mechanisms against resorption Unlike deciduous teeth, permanent teeth rarely un-dergo root resorption (1). Even in the presence of peri-radicular inflammation, resorption will occur pri-marily on the bone side of the attachment apparatus and the root will be resistant to it (Fig. 1) (2). Al-though many theories have been put forward, the rea-son for the resistance of the root to resorption is not fully understood. One theory maintains that the rem-nants of the epithelial root sheath surround the root like a net, therefore imparting a resistance to resorp-Fig 1. A, B, C. Teeth with extensive peri-radicular periodontitis due to pulpal infection. Note the resorption of bone; however, the roots remain intact. 79 tion and subsequent ankylosis (3, 4). However, this