This article describes the modeling of clinical examinations in oral medicine using OWL. Based on experiences from our previous work and knowledge model, requirements for an ontology for examinations in oral medicine are identified. OWL can be used to address most, but not all, of the requirements. We found a lack of guidance for several design choices and for development of OWL ontologies at different levels of sophistication. However, using OWL gives us the ability to come back and refine the knowledge model after initial deployment.