Maxillary Central Incisor 9-001
$11.00 – $175.85
TrueTooth™ Maxillary Central Incisor Replica 9-001
Difficulty Factor: 3*
This maxillary central incisor, with its mid-root lateral canal and large sweeping accessory canal in the apical third, is my favorite TrueToothTM Training Replica with which to begin a CE hands-on course.
9-001 poses a moderate challenge during the access procedure, as the major part of the pulp chamber is calcified, receding to the CEJ. However, there remains a tiny thread of pulp chamber remnant that can be intersected 1.5mm earlier with a round-ended ultrasonic tip. When this pulp chamber remnant is initially encountered, it will allow a #15 K-file to penetrate just a millimeter or two before meeting a coronal impediment (a buccal canal fin) that is easily traversed after the very tip of the file is bent. Once past the impediment, it requires just a couple of push-pull strokes with a 21mm #15 K-file to smooth the impediment, after which a guided-tip endo access bur (ie, LA Axxess Diamond Bur/SybronEndo) can be used to complete the access cavity preparation.
The canal space is moderate to large in size, having a fairly large mid-root lateral canal and an apical accessory canal that branches smoothly but abruptly from the primary canal in its last 3 mm’s. A slight impediment can be felt when file tips click past the mid-root lateral canal orifice, but the main event in this tooth is the apical accessory canal. This canal provides the exact procedural challenge that clinicians often encounter in patient’s teeth, while teaching tactile feedback needed to overcome this common challenge in practice.
While the mid-root lateral canal is difficult or impossible to negotiate with a file, it nevertheless provides a good indicator of irrigation efficacy, as the soft polymer contained in it dissolves in the presence of NaOCl, in similar irrigation time frames for real teeth. For those students who are successful in their instrumentation and irrigation, the thrill of the fill awaits any 3D obturation procedure. For those needing further training, the post-op x-ray and final appearance offer the feedback necessary to deconstruct failures and improve technique.
Terminus diameter = .28mm.