Increased blood pressure in middle-aged individuals (up to 55 years old) is associated with a higher remaining lifetime risk of cardiovascular disease (CVD). Previous studies suggested that work-related strain was associated with increased risk of CVD events in hypertensive Japanese workers aged 40–65 years. On the other hand, dental caries, periodontal diseases, and tooth loss are associated with hypertension. The aim of our study was to evaluate the association between high-risk group of cardiovascular disease and dental status in Japanese manufacturing workers aged 55 years and older. This cross-sectional study evaluated the association between high-risk group of CVD and dental status in Japanese manufacturing workers aged 55 years and older, after adjusting for potential confounding factors via propensity score matching. Individuals with high-risk group of CVD had significantly higher numbers of decayed teeth, lower numbers of filled teeth, and worse periodontal statuses than matched controls. However, there was no significant difference between the high-risk group of CVD and non-high-risk group of CVD in numbers of present teeth. Poor dental status may be one of the exacerbation factor of CVD in Japanese manufacturing workers aged 55 years and older.

View full abstract

Purpose: With the increased number of implanted and restorations placed the number of incident also have increased. The purpose of this study was to evaluate the relationship between lateral guidance and the incidence of complications in single implant-supported posterior crowns. Methods: 40 patients, with a total of 70 implants and restorations, were divided into two lateral guidance categories of canine guidance (CG: 19 subjects) and group function (GF: 21 subjects). Next, three major complications composed of dental implant failure, abutment connecting screw loosening and crown needing re-cementation were evaluated in each of the two lateral guidance groups. Results: The incidence of implant fixture failure occurred significantly more often in GF than in CG (5.3% vs 0 %). GF also tended to have a higher incidence of screw loosening than CG (13.2% vs 9.4%, p=0.4149). However, CG tended to have a higher incidence of re-cementation than GF (21.9% vs 13.2%, p=0.1557). Although there was no significant difference between the two groups (p=0.7007), GF tended to have more occurrences of complications than CG with regard to the first year from the Kaplan-Meier survival estimation method. The overall success rate of osseointegration in this study was found to be 97.2% (68 of 70 implants). Conclusions: GF had significantly more implant-failure incidences than CG. Although there was no significant statistical difference, GF tended to have more occurrences of complications with regard to the first year and abutment connection screw loosening than CG. These results suggest CG is a better lateral guidance for single implant-supported posterior crown in clinically than GF.

View full abstract