Seldon 1R/1L instruments are best employed for which type of tooth?

Seldon 1R/1L instruments are specifically designed for use in multi-rooted teeth. These instruments are utilized to effectively access and clean the root canal systems that are characteristic of multi-rooted teeth, such as maxillary molars and mandibular molars, which typically have two or more roots and accompanying canals. Their design facilitates the instrumentation and obturation of these complex systems, making them ideal for this scenario.

In contrast, single-rooted teeth, such as incisors or canines, would not require the same tools as their root canal systems are simpler and often more straightforward to manage. Primary molars are a type of multi-rooted tooth, but they have unique anatomical considerations that may not necessitate the specific use of Seldon instruments. Similarly, deciduous canines, which are single-rooted, would not benefit from the characteristics of the Seldon 1R/1L instruments suited for the complexities of multi-rooted tooth structures.