Description

Mandibular Molar 3D Model

Watertight STL of a mandibular molar with a continuous root canal and simulated open apices. Built for training MTA apical plug/apical barrier techniques, conservative access cavity design, and crown/onlay preparation. Prints cleanly on SLA/DLP and FDM systems. Extra-oral educational use only.

Key Features

• Watertight STL: manifold mesh, no self-intersections; slicer-ready (PreForm, Chitubox, Lychee, Cura/Prusa).

• Realistic morphology: detailed occlusal fossae/grooves, buccal–lingual contours, two roots with clear furcation.

• Open Apex simulation: apical foramina modeled as open for apical barrier training and extrusion control.

• Continuous canal path: from chamber to apex—supports irrigation/drying and delivery of bioceramics.

• Prosthodontic practice: stepwise occlusal/axial reduction, functional cusp bevel, Chamfer/Shoulder margin design, taper and OCS checks.

• Scalable: default 1:1; upscale to 1.2–1.5× for classroom demonstrations.

• Education-only: not a medical device; not intended for intraoral use.

Full Description

This printable mandibular molar lets you run two complementary training tracks on a single model:

1. Endodontics — Open Apex

   • Practice MTA/Biodentine apical plug placement (typical 3–5 mm barrier), working-length control in patulous canals, and prevention of extrusion.

   • Simulate irrigation → drying → delivery → condensation using carriers or micro-cannulas.

   • Standardize access cavity design while preserving pericervical dentin.

2. Fixed Prosthodontics — Crown/Onlay Prep

   • Rehearse occlusal reduction, functional cusp bevel, finish-line selection (Chamfer/Heavy Chamfer/Shoulder with internal rounding), evaluate taper and path of insertion.

   • Verify occlusal clearance with gauges or desktop scanning.

Tip: Print in translucent resin for endo demos (canal and apical plug visibility) or gray/ivory for high-contrast evaluation of prep lines.

Learning Outcomes

• Case selection for open apex (apical barrier vs. apexification) and correct apical plug thickness.

• Controlled placement/condensation of bioceramic materials at an open apex.

• Conservative access with line-angle preservation.

• Predictable finish-line execution and taper (~6–12° for training).

• Before/after documentation (occlusal, buccal, apical views) for self-assessment.

What You Get

• File type: STL (binary), watertight/manifold

• Scale: 1:1 (user-scalable in slicer)

• Geometry: mandibular molar with two roots + furcation, continuous canal, open apices

• Software compatibility: PreForm, Chitubox, Lychee, Cura, PrusaSlicer, etc.

Printing Guide

SLA / DLP

• Layer height: 50 µm (25 µm for extra occlusal detail)

• Orientation: roots angled 30–45° downward from build plane; supports under non-functional cusps and around the furcation

• Resin: gray/ivory for prep, translucent for endo

• Post-process: wash & fully cure per resin IFU; confirm canal patency with a fine probe

FDM

• Nozzle: 0.25–0.40 mm | Layer: 0.12–0.20 mm

• Infill: 100% (or 60–80% if weight matters)

• Material: PLA / PLA-Tough; check canal outlets with a micro-drill if needed

Use Cases

• Workshops in VPT/Regendo/Open Apex and MTA apical plug techniques

• Bench-top practice for full crown / onlay preparation

• Classroom demos, filming, and pre-clinical skills assessment

Technical Specifications

• Tooth type: mandibular molar, two roots with distinct furcation

• Canal: continuous chamber-to-apex path; open apices

• Mesh integrity: manifold, non-self-intersecting, support-friendly

• Intended use: extra-oral educational model only

FAQs

Is the model sterilizable/autoclavable?
No. This STL is for extra-oral training only and does not replace sterile clinical instruments.

Can I practice an apical plug with MTA?
Yes—the open apex and continuous canal are designed for apical barrier training and extrusion control.

Best material to visualize the canal?
Translucent SLA/DLP resin provides the clearest view of the canal and apical plug; gray resin is best for evaluating prep lines.

Can I get a larger model?
Scale to 1.2–1.5× in your slicer; geometry fidelity is preserved.