# Ultrasonic Technique to Retrieve a Rotary Nickel-Titanium File Broken Beyond the Apex and a Stainless Steel File from the Root Canal of a Mandibular Molar: A Case Report.

> Research article (PubMed, 2015) · cited 11× · AI/ML

**Wikidata**: [openalex:W2229973455](https://www.wikidata.org/wiki/openalex:W2229973455)  
**Source**: https://4ort.xyz/entity/ultrasonic-technique-to-retrieve-a-rotary-nickel-titanium-file-broken-beyond-the-apex-and-a-stainless-steel-file-from-th