Sir, with regard to the letter by J. Dhanda et al. about high speed laceration (BDJ 2008; 204: 352) I would like to draw readers' attention to a new device called 'Isolite' which delivers continuous illumination, retraction and isolation (www.isolitesystem.com). It has a unique mouth piece which will retract and protect the cheek and tongue from accidental damage from the high speed turbines. The mouth piece is disposable and hence there is no risk of cross infection, it is easy to place and comfortable for the patient.