Dental erosion is caused by dietary or gastric acid. This study aimed to examine the location and severity of tooth erosion with respect to causative factors, and to determine whether the clinical pattern of erosion reflected the dominant etiological factor. The study involved 249 Icelandic individuals and included: a detailed medical history; clinical oral examination; salivary sampling, and analysis for flow rate, pH, and buffering capacity. Reflux was assessed in 91 individuals by gastroscopy, esophageal manometry, and 24-hour esophageal-pH monitoring. Reflux symptoms were reported by 36.5% individuals. Manometry results were abnormal in 8% of study participants, abnormal esophageal pH in 17.7%, and a pathological 24-hour pH recording in 21.3%. 3.6% were positive for Helicobacter pylori. Normal salivary flow was found in 92%, but low salivary buffering (10.4%) was associated with erosion into dentin (P < 0.05). Significant associations were found between erosion and diagnosed reflux disease (OR 2.772; P < 0.005) and daily consumption of acidic drinks (OR 2.232; P < 0.005).

sTREM-1 and PGLYRP1 are elevated in CKD patients with poor oral health and positively correlate with the number of active periodontal pockets, following oral infection therapy. Moreover, they positively correlate with MMP-8 and IL-1β. Hence, salivary TREM-1- PGLYRP1 axis could be useful as diagnostic marker for oral infection within CKD patients.

We investigated oral health of chronic kidney disease (CKD) patients at predialysis state. The hypothesis was that diabetic nephropathy affects oral health more detrimentally than other CKD patients due to the known risk diabetes presents in this regard. We expected worse oral health and particularly poor periodontal health among the diabetic patients. A cross-sectional study was conducted in the Helsinki University Central Hospital, Finland, on 148 patients with different kinds of kidney disease at predialysis state. Data from medical records, clinical oral examination, saliva, and mucosal yeast counts were analyzed and compared between the disease groups. Of the patients, 53 (36%) had diabetic nephropathy (29 patients with type 1, 24 patients with type 2 diabetes). Compared with other CKD patients, diabetic patients had poor glycemic control as expected (mean HbA(1C) 8.0% vs 5.9%, p < 0.01). Diabetic patients also had more dental caries (mean number of carious teeth 5.1 vs 3.1, p < 0.01) and lower salivary flow rates than other CKD patients (stimulated salivary flow 1.2 ml/min vs 1.6 ml/min, p < 0.05). No difference between groups was observed in periodontal health and yeast counts. In conclusion, diabetic nephropathy patients indeed had worse dental health in comparison to CKD group. However, contrary to our expectation, diabetic nephropathy did not seem to affect periodontal health more severely than the other kidney diseases.

Risk of death was higher among patients with diabetic nephropathy. The deceased had fewer teeth and more oral infections. However, indices used failed to show independent association with survival.