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Environmental sustainability: Bamboo toothbrushes not the answer new study reveals

15 September 2020

A joint study with Trinity College Dublin has found that plastic manual toothbrushes, with replaceable heads, are the best type for the planet and associated human health.

toothbrush

A joint study led by 果冻影院 Eastman and Trinity College Dublin has found that plastic manual toothbrushes, with replaceable heads, are the best type for the planet and associated human health.

Across two papers published in the BDJ, researchers reported on the environmental impact and cost to human health of four types of toothbrush: electric, traditional plastic, plastic with replaceable head and bamboo. 聽

The results could be used to inform healthcare policies, individual consumer choice and the large-scale procurement of toothbrushes for public health programmes.

Co-author said: 鈥淎 life-cycle assessment (LCA) is a cradle-to-grave analysis which considers all aspects of a product along its life cycle, including raw materials, manufacture, use, transport and disposal.

鈥淥ur LCAs revealed that plastic, manual, replaceable head toothbrushes and bamboo manual toothbrushes perform better than traditional plastic manual and electric toothbrushes in every environmental impact outcome measure used in this study.聽

鈥淗owever, bamboo toothbrushes may stop land from being put to better use such as increasing biodiversity, or in growing trees to offset carbon emissions.

鈥淚t is therefore not necessarily the best option for the environment as popularly believed.鈥

The research also highlighted the human health burden of the toothbrush manufacturing process.聽

The electric toothbrush causes 10 hours of disability measured in Disability-Adjusted Life years or DALYS - mainly for the people associated with the process of making and producing the devices. 聽This is five times higher than a normal plastic brush.聽

Lead researcher Dr Brett Duane, Associate Professor in Public Dental Health at Trinity College, said: 鈥淭here are billions of toothbrushes used and discarded every year.

鈥淥ur research shows that electric toothbrushes are actually harmful for the planet and to the people involved in the manufacturing process and distribution.聽

鈥淭he most environmentally sustainable toothbrush is one which uses plastic which is recycled in a continuous process.聽

鈥淧lastic brushes which can be recycled don鈥檛 take up a lot of land and they don鈥檛 need lots of water to grow.聽

鈥淭he important thing here is to keep the plastic in the recycling chain. We need a system where plastic toothbrushes can be collected like batteries and then recycled into new products.聽

鈥淚f the plastic escapes the recycling chain, it needs to be able to be easily and naturally broken down into harmless products.鈥


Read the papers: