# SEM characterization and ageing analysis on two generation of invisible aligners

> Research article (BMC Oral Health, 2021) · cited 36× · AI/ML

**Wikidata**: [openalex:W3173442895](https://www.wikidata.org/wiki/openalex:W3173442895)  
**Source**: https://4ort.xyz/entity/sem-characterization-and-ageing-analysis-on-two-generation-of-invisible-aligners