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GreenMark Biomedical

Starch nanoparticle rinse that reveals early tooth decay

Raised to date

No sales reported yet

of $5M offered across 1 Form D filing

Still open
$5M
Last filed
Apr 14, 2026

About

GreenMark Biomedical is a Michigan dental and medical products company founded in 2016 around a starch nanoparticle platform developed with the University of Michigan. Its sub-micron particles are made from food-grade starch, so enzymes in saliva break them down, which lets them be used as carriers and targeting agents in the mouth. The company sells a caries detection rinse for professional dental exams and a mineral-releasing dental strip, positioning itself around earlier diagnosis and minimally invasive treatment of tooth decay. It operates from East Lansing with lab facilities in Ann Arbor.

A food-grade starch nanoparticle platform that is enzymatically degraded in saliva, letting the particles both target early-stage carious lesions for detection and carry calcium and phosphate for remineralization — an approach built on detecting and treating decay before drilling rather than restoring it after.

Funding

  • EquityFiled Apr 14, 2026Form D
    None sold/ $5M

Product

LumiCare Rinse

Dental diagnostic

A caries detection rinse for professional dental use, containing fluorescent sub-micron starch particles functionalized to target and adhere to the subsurface of early-stage carious lesions. Used with a standard dental curing light during an exam, it makes areas of early decay luminesce so the dentist can see the extent of the lesion.

  • Fluorescent sub-micron starch particles that bind to early carious lesions
  • Works with a standard dental curing light and orange filter — no new capital equipment
  • Made from food-grade starch, degraded by enzymes in saliva

Built for

Oral healthcare professionals — dentists and hygienists, including pediatric practices

People on file