Biofilm Annotation Masks for Dental Prostheses

Segmentation masks of dental biofilm on removable dental prostheses, for research on automatic biofilm detection without disclosing agents.

This record contains 33 binary annotation masks (PNG) from 11 patients. Each mask was annotated manually by a dental professional directly on the undyed photograph of the prosthesis. White (255) indicates biofilm; black (0) indicates background and clean prosthesis surface. Resolution is 6000 × 4000 pixels, matching the original photographs. Filenames follow the pattern pac_NN__view.png.

Ethics: study approved by the Research Ethics Committee (CAAE No. 96996226.8.0000.5142). By determination of the Committee, the patient photographs are not publicly released. Only these annotation masks — which contain no identifiable information — and the accompanying documentation are made public.

Context: the masks derive from an original, purpose-built image bank of removable dental prostheses photographed under standardized studio conditions in multiple views. For each prosthesis, several states were recorded: undyed, dyed with disclosing agent, cleaned, and manual annotation. The full bank comprises 22 patients; photographs remain restricted to the research team.

Masks were annotated on the undyed image because the prosthesis is handled between acquisitions and returns to a slightly different position, preventing precise spatial alignment between the dyed and undyed photographs.

Annotation is ongoing; 18 additional masks are pending and may be included in future versions.