Critical hemorrhage in the floor of the mouth during implant placement in the first mandibular premolar position: a case report.

Although dental implantation is considered to be a safe surgical procedure, this report focuses on a critical hemorrhaging episode associated with implant placement in the first mandibular premolar position. Excessive bleeding and formation of massive lingual, sublingual, and submandibular hematomas were the result of arterial trauma that occurred during the osteotomy preparation. The vascular injury was induced through a perforation of the lingual mandibular cortex.

Crevicular fluid levels of interleukin-1alpha and interleukin-1beta during experimental gingivitis in young and old adults.

The purpose of the present investigation was to study the effect of age on interleukin-1alpha (Il-1alpha) and interleukin-1beta (Il-1beta) production during experimental gingivitis. One group of five young subjects (20-22 years old) and another group of five older subjects aged 61-65 years were involved in the study. A professional plaque control programme was undertaken to establish healthy gingival conditions at baseline.