Complex sentence: By the end of the 19th century, the introduction of forceps rendered the tooth key mostly obsolete, however, a modern version of the dental key, the Dimppel Extractor, briefly revitalized its use later in the 20th century.
Split into simpler sentences: By the end of the 19th century, the introduction of forceps rendered the tooth key mostly obsolete. However, a modern version of the dental key, the Dimppel Extractor, briefly revitalized its use later in the 20th century.