This document discusses scaling up assistive health innovations for people with dementia through a social innovation approach. It notes the increasing number of people with dementia worldwide and efforts to support aging in place. While assistive innovations exist, wide-scale diffusion remains difficult. The document proposes a social innovation model using open networks with shared values, knowledge, and savings to facilitate collaboration between stakeholders like people with dementia, caregivers, healthcare professionals, researchers, developers and policymakers. It provides the example of an "Ecosystem Dementia Care" initiative in the Netherlands that has established various "Communities of Practice" to better understand each other's perspectives and languages to improve diffusion of innovations through a collaborative approach.