ABSTRACT
Introduction Dental procedures produce splatter and aerosol which have potential to spread pathogens such as SARS-CoV-2. Mixed evidence exists on the aerosol-generating potential of orthodontic procedures. The aim of this study was to evaluate splatter and/or settled aerosol contamination during orthodontic debonding.Material and methods Fluorescein dye was introduced into the oral cavity of a mannequin. Orthodontic debonding was undertaken with surrounding samples collected. Composite bonding cement was removed using a speed-increasing handpiece with dental suction. A positive control condition included a water-cooled, high-speed air-turbine crown preparation. Samples were analysed using digital image analysis and spectrofluorometric analysis.Results Contamination across the eight-metre experimental rig was 3% of the positive control on spectrofluorometric analysis and 0% on image analysis. Contamination of the operator, assistant and mannequin was 8%, 25% and 28% of the positive control, respectively.Discussion Splatter and settled aerosol from orthodontic debonding is distributed mainly within the immediate locality of the mannequin. Widespread contamination was not observed.Conclusions Orthodontic debonding is unlikely to produce widespread contamination via splatter and settled aerosol, but localised contamination is likely. This highlights the importance of personal protective equipment for the operator, assistant and patient. Further work is required to examine suspended aerosol.
ABSTRACT
PURPOSE: The purpose of this study was to assess numbers of patients that required removal of miniplates after open reduction and internal fixation of the orbitozygomatic complex over a six-year period, and review the reasons for removal. PATIENTS AND METHODS: This was a retrospective study from February 2007 to December 2013. All patients who had open reduction and internal fixation for traumatic orbitozygomatic complex fractures were included and those who returned to theatre for plate removal were identified. RESULTS: 307 plates were placed in 216 patients. Eight plates were removed from six patients giving a 2.6% incidence of plate removal (2.78% of patients). Infection or exposure occurred within the first year in five out of six patients, accounting for the seven buttress plates, which were in situ for an average of 180 days. The infraorbital plate was in situ for 972 days. The majority of plates used were buttress plates as single point fixation. CONCLUSIONS: In our experience placement of buttress plates for one-point fixation of traumatic orbitozygomatic complex fractures seems to be a safe and effective method with a low rate of complication. Complications seem to occur within a year, which is similar to previous studies.
