Cementoblastoma is one of many mandibular lesions is a rare tumour of the cementum, with only approximately 100 cases reported. Key to diagnosis both radiologically and histologically is attachment to the tooth root

Cementoblastomas have been previously described in the literature as cementomas, true cementomas, sclerosing cementomas, periapical fibro-osteoma, and periapical fibrous dysplasia 3,4 although "cementoma" is only mentioned as "periapical cementoma", a type of osseous dysplasia in the 2005 WHO histological classification of odontogenic tumours 5

Median age is 20 years (range 8-44 years) with no sex predilection 5,6.

The usual location is around the apex of the premolars. These tumours originating from (i.e. in connection with) the tooth root and is usually slowly enlarging. It therefore obliterates the periodontal ligament space. 

It is typically radiodense or mixed-density with a rounded or sunburst appearance, and a relatively radiolucent rim. Loss of the periodontal ligament space along with root resorption / loss of root outline are common 5

Recurrence is common with incomplete resection 5,6.

Share article

Article information

rID: 1068
System: Head & Neck
Synonyms or Alternate Spellings:
  • Cementoblastomas
  • Cementomas
  • True cementomas
  • Sclerosing cementomas
  • Periapical fibro-osteomas
  • Periapical fibrous dysplasia

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Case 1: OPG
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.