Objectives/Aims:

Fruit is often advocated as a healthy source of nutrients and vitamins. However, the high contents of sugars in many fruits could potentially counteract positive effects on the teeth.

Materials and methods:

We recruited 30 healthy non-obese participants who were randomised to either supplement their diet with extra fruits or nuts, each at +7 kcal/kg body weight/day, for 2 months.

Results:

Fructose intake increased from 9.1±6.0 to 25.6±9.6 g/day, P<0.0001, in the fruit group and was reduced from 12.4±5.7 to 6.5±5.3 g/day, P=0.007, in the nut group. Serum-vitamin C increased in both groups (fruit: P=0.017; nuts: P=0.009). α-Tocopherol/cholesterol ratio increased in the fruit group (P=0.0033) while β-carotene/cholesterol decreased in the nut group (P<0.0001). The amount of subjects with probing pocket depths ⩾4 mm in the fruit group was reduced (P=0.045) according to blinded examinations, and the difference in the changes in probing pockets ⩾4 mm was also statistically significant between the food groups (P=0.010).

Conclusion:

A large increase of fruit intake, compared with nuts, had a favourable effect on periodontal status in some respects, despite the high sugar contents. To search for potential protective micronutrients in fruit that protect the teeth could be an aim for further research.

中文翻译：

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一项针对年轻受试者的随机研究，研究多吃水果或坚果对牙周炎症的影响

目标/目的：

水果通常被认为是营养和维生素的健康来源。然而，许多水果中的高糖含量可能会抵消对牙齿的积极影响。

材料和方法：

我们招募了 30 名健康的非肥胖参与者，他们被随机分配到他们的饮食中添加额外的水果或坚果，每人每天 +7 kcal/kg 体重，为期 2 个月。

结果：

水果组的果糖摄入量从 9.1±6.0 增加到 25.6±9.6 g/天，P <0.0001，坚果组从 12.4±5.7 减少到 6.5±5.3 g/天，P = 0.007。两组的血清维生素 C 均增加（水果：P = 0.017；坚果：P = 0.009）。果实组α-生育酚/胆固醇比值升高（P =0.0033），而坚果组β-胡萝卜素/胆固醇比值降低（P <0.0001）。根据盲法检查，水果组探穴深度4 mm的受试者数量减少（ P =0.045），探穴变化差异食物组之间的 4 mm 也具有统计学意义（P = 0.010）。

结论：

尽管含糖量高，但与坚果相比，水果摄入量的大幅增加在某些方面对牙周状况产生了有利影响。在水果中寻找保护牙齿的潜在保护性微量营养素可能是进一步研究的目标。