Surgical management of impacted primary teeth: report of two cases.

Aim: Impaction of deciduous teeth is an uncommon event. The purpose of this report is to describe two unusual eruption failures of a second primary molar and their treatment management.

Case Report: The diagnostic and therapeutic protocol of two cases selected at the Unit of Paediatric Dentistry, Department of Oral and Maxillofacial Science, "Sapienza" University of Rome, Italy, are presented.

Langerhans cell histiocytosis: oral/periodontal involvement in adult patients.

Objective: Langerhans cell histiocytosis (LCH) is a clonal proliferative multisystem disease. Although bone and mucosae have been classified as non-risk organs, their involvement may increase the risk of disease progression. Oral and periodontal lesions are burdened with a significant impairment of quality of life for associated signs, symptoms and loss of function.

Black stains in the mixed dentition: a PCR microbiological study of the etiopathogenic bacteria.

The aim of this work is to emphasize that particular stains on the third cervical of the buccal and lingual surfaces in mixed dentition, called "black stain." Previous research showed the microbiological etiology of this discoloration by chromogen bacterias. Our study shows bacteria spp involved in stains by means of PCR process and electrophoresis gel on the agarose medium.

Surgical removal of a left lower third molar root after iatrogenic displacement in soft tissue. Case report.

Displacement of a tooth or a portion of it is an unusual but very serious event for the severe consequences it could have. Already Hill and Howe in the half of the past century understood and described the risks associated to this accident particularly frequent during impacted third lower molars avulsion. Displacements can be idiopathic or iatrogenic and the sites of displacements depend on the anatomy of the tooth and the surrounding region.