Diabetes Mellitus has wide-ranging effects on oral health. Poor glycaemic control increases infection risk and slows healing, while oral disease can also worsen diabetic control. This creates a strong bidirectional relationship, particularly with periodontal disease.
Periodontal Disease (Bidirectional Relationship)
Periodontal disease is one of the most significant oral complications of diabetes.
- Diabetes increases the risk and severity of gingivitis and periodontitis
- Periodontal inflammation can worsen glycaemic control
- Poorly controlled diabetes accelerates bone loss and attachment loss
Patients may also present with periodontal abscesses, characterised by:
- Localised swelling and pain
- Pus discharge
- Rapid breakdown of supporting tissues
- Acute flare-ups of chronic periodontal disease
Salivary Changes and Caries Risk
Diabetes commonly affects salivary flow and the oral environment:
- Xerostomia (dry mouth) due to reduced salivary flow
- Increased plaque accumulation and acidity
- Higher caries risk
This often leads to:
- Rapidly progressing decay
- Cervical and root caries, especially in older patients
- Difficulty wearing dentures comfortably
Fungal Opportunistic Infections
Reduced immunity and elevated salivary glucose increase susceptibility to fungal infections:
- Oral candidiasis (thrush) is most common
- Burning sensation and soreness
- White or red patches
- Altered taste
Healing and Bone Complications
Poor glycaemic control significantly impacts healing and infection response:
- Delayed wound healing after extractions or surgery
- Increased post-operative infection risk
- Reduced bone turnover and impaired repair
- Greater risk of periodontal bone loss
Other Oral Findings
Diabetes may also present with a range of neuropathic and mucosal symptoms:
- Burning Mouth Syndrome
- Dysgeusia (altered taste sensation)
- Increased oral discomfort or sensitivity
Grinspan Syndrome
A rare but recognised association includes:
- Oral lichen planus
- Diabetes mellitus
- Hypertension
This combination is known as Grinspan Syndrome.
Key Message
Diabetes has widespread effects on oral health, particularly through infection risk, gum disease, salivary changes, and delayed healing. Importantly, controlling periodontal disease can also support better systemic diabetic control.
Regular dental care, early detection, and good glycaemic management are essential to prevent complications.
If you have diabetes, the team at Dural Dental Practice can help monitor your oral health and manage any complications early to protect both your smile and overall health.
