Oral health and diabetes: from evidence to insights Biting into sugar coated data

Over the past decades the link between diabetes mellitus and oral health has been extensively studied, with observed associations suggesting an increased risks for conditions such as periodontitis and caries in individuals with diabetes mellitus. This thesis aimed to clarify the nuances of this relationship and explore its implications for clinical practice.
Synthesis of existing systematic review of the available literature shows that although diabetes is associated with an increased risk of oral disease, the strength of these relationships is smaller than often assumed. The clinical relevance therefore appears to be limited. Caries and periodontitis are major causes of tooth loss. Higher caries scores were found in diabetic patients, indicating an increased risk of tooth decay, but the effect size of this association was found to be small. Interestingly, as a surrogate parameter of severe tooth decay no difference was found in the number of root canal treatments between diabetics and non-diabetics. However, diabetic patients did have a significantly higher risk of tooth loss and toothlessness, although this effect was also estimated to be small. No evidence of causation was found for the relationship between periodontitis and diabetes. Moreover, the thesis showed that diabetes does not negatively affect the outcome of treatment in periodontitis patients.
Overall, the thesis offers important insights into the complex relationship between diabetes mellitus and oral health, underlining the need of careful interpretation of observed associations to inform effective prevention and treatment strategies.