Journal of Dental Medicine

Background and Aim: Extensive and continuous consumption of acidic drinks is the main cause of enamel erosion in human teeth. The purpose of this study was to compare the erosive potential of two Iranian drinks with those of two imported ones.

Materials and Methods: Two Iranian drinks (Cola Zamzam and Orange Zamzam) and two imported ones (Pepsi and Miranda) were studied in this experimental invitro study. 120 intact premolar teeth, extracted for orthodontic reasons were divided into 3 equal groups (A, B and C). Each group was exposed to one of the drinks for exposure times of: A: 15 minutes, B: 45 minutes and C: 12 hours. Each group was divided into 4 subgroups (each containing 10 teeth), which were exposed to 20 ml of one of the 4 drinks. The exposed surface was the same in all samples (a 5 mm in diameter semi circular window). The amount of Ca++ ion (mg/ml) added to each drink at the end of exposure time was estimated by atomic absorption spectrophotometer.

Results: 2 way ANOVA showed that the drinks were significantly different with regard to released Calcium ion. Time had significant effect on erosive potential. The two mentioned factors had significant interaction (P<0.001). The most erosive effect was seen in 12 hours in all of the drinks. The erosive effect of Orange Zamzam in 15 minutes and Pepsi in 45 minutes and 12 hours was significantly more than other groups (P<0.001).

Conclusions: Pepsi had the most long term erosive effect among the four drinks, and Cola Zamzam had the least erosive potential.

  Background and Aims: Thermal changes in the oral cavity can be transferred to the implants placed in bone and affect the prognosis of the treatments. Furthermore, some investigators proposed improvement of habitual consumption of hot or cold beverages. The aim of the present study was to measure the effect of temperature changes in the oral cavity following consumption of hot and cold drinks on the temperature of implant.

  Materials and Methods: In this clinical trial, 3 eligible patients were selected. Two months after implant insertion, temperature of the implants was measured following the drinking of hot and cold beverages using a sensor connected to a thermometer. The thermal changes of the implants through the different time intervals were analyzed using Friedman non-parametric test.

  Results: The implant temperatures were significantly increased in the time following drinking of the hot beverages (P=0.009). Furthermore, the implant temperature were statistically decreased in the time after drinking cold beverage (P=0.004). When drinking hot beverages, the maximum and minimum temperatures were 41.57 ⁰ C and 36.77 ⁰ C, respectively. The maximum and minimum temperatures of the implants were also 34.13 ⁰ C and 26.83 ⁰ C , respectively, when drinking cold beverages.

  Conclusion: It seems that the temperatures noted in the implants in the current study cannot weaken the prognosis of implant restorations however, habitual consumption of hot and cold beverages can lead to debilitating implant prognosis and therefore, should be given the necessary warnings to patients.