Patel S, Foschi F, Mannocci F, Patel K. External cervical resorption: a three-dimensional classification.

No abstract

Varicella zoster virus (VZV) is responsible for the primary infection chicken pox.Following the initial infection, it remains latent but can reactivate resulting in shingles (herpes zoster). Previous reports have implicated VZV in the pathogenesis of apical periodontitis but the involvement of virus has not been investigated. The present case describes a patient who suffered from a severe episode of shingles and subsequently developed periapical radiolucencies of all the teeth in the affected nerve distribution.Molecular and culture techniques demonstrated the presence of VZV DNA in the root canal system in absence of bacteria. This confirms that VZV can cause localised pulp necrosis and apical periodontitis. The lesions healed following endodontic treatment implying chemomechanical debridement using sodium hypochlorite irrigation and a calcium hydroxide interim dressing may be effective against the virus.

Intentional replantation consists of purposefully extracting a tooth, correcting the defect and replanting it into its original socket. This case report describes how this technique was used to successfully restore an external cervical resorptive (ECR) lesion. A 22-year-old man was diagnosed with ECR of the mandibular right canine following clinical and radiographic examination. CBCT showed the lesion had been initiated distally and extended circumferentially around the root canal. The nature of the resorptive lesion meant that it was inaccessible to repair conventionally in a predictable manner. This report describes how intentional replantation was used to access and restore the lesion with minimal patient cooperation and postoperative discomfort. At an 18-month recall the tooth was clinically sound with no radiographic evidence of inflammatory or replacement root resorption. Intentional replantation should be considered a viable treatment option when ECR is inaccessible and cannot be restored using conventional techniques.