Meshmixer Is Discontinued: Alternatives for Dental STL Work

Autodesk ended development of Meshmixer with version 3.5 in 2018. The Windows 64-bit installer is still listed free on Autodesk’s Marketplace and still does the everyday dental jobs, but it gets no fixes, there is no current Mac installer and there has never been a Linux build. The short answer for dental STL work: keep Meshmixer on Windows while it works, and learn one maintained free tool alongside it. MeshLab is the closest match for repair, hole filling and simplification; Blender with its 3D Print Toolbox extension replaces the trimming, basing and hollowing workflow, with a steeper learning curve. If your STL starts as a CBCT scan, the replacement is not a mesh editor at all but a segmentation tool: 3D Slicer (with SlicerCMF for measurement) or 3DimViewer. Autodesk itself points Meshmixer users to Fusion, which includes mesh tools but is commercial CAD, not a free replacement.

Side by side

Trimming a scan and adding a base

This is the job most people used Meshmixer for: cut the ragged edge off an intraoral scan, smooth the boundary and extrude a flat base so the arch stands on the build plate. In Meshmixer it is Plane Cut or a brush selection, Smooth Boundary, then Extrude with a flat end. In Blender the same result comes from Bisect in Edit Mode (or a Boolean with a cutting box), then filling and extruding the open edge down to a flat plane; it takes more clicks the first few times, but every step is precise and repeatable. MeshLab can cut and clean, but its filter-based interface is less suited to shaping a base by hand. If model basing is a daily task, Blender is the maintained tool to learn.

Repairing holes, non-manifold edges and loose fragments

Scanner exports often contain small holes, stray triangles and floating islands that stop a slicer from producing a clean print. Meshmixer’s Analysis > Inspector finds and repairs them in one pass. MeshLab is the strongest free replacement here: its cleaning and repair filters remove duplicate and isolated geometry and non-manifold edges, and it fills holes and can report mesh measurements. In Blender, the 3D Print Toolbox checks the mesh and offers Make Manifold to fix the errors that block printing. A practical split is to repair in MeshLab and shape in Blender.

Hollowing and reducing file size

Resin models print faster and cheaper when hollow, and dense scans slow every tool down. Meshmixer offers Hollow with a set wall thickness and escape holes, plus Reduce to cut the triangle count. Blender’s 3D Print Toolbox has a Hollow tool that creates a consistent wall thickness, and Blender’s own decimation reduces dense meshes. MeshLab’s simplification filters are well suited to shrinking large scans before editing elsewhere. Whatever you use, check wall thickness before printing and add drain holes on the base.

Making an STL from CBCT

Meshmixer was often the second step after a CBCT segmentation, cleaning a noisy bone model. The first step needs a DICOM tool. 3DimViewer thresholds bone and teeth, builds a surface model and exports STL, but its last release is from 2017. 3D Slicer is maintained, segments the volume in the Segment Editor and exports STL or OBJ from the Segmentations module’s Export to files section. With SlicerCMF added, it also superimposes serial scans and measures 3D landmarks, though that bundle has not changed since 2022 and 3D Slicer is designed for research, not reviewed by the FDA. Either way, expect scatter from metal restorations and clean the STL before printing.

Capturing a model when you have no scanner

Meshmixer never scanned anything; it cleaned what other tools captured. Skanect captures casts and faces with a Structure depth sensor and exports STL, but it is shareware (conditionally free), the free mode saves only 5,000 polygons for non-commercial use, and Structure is phasing it out. insight3d reconstructs models from photographs but is dormant since 2009; maintained open-source photogrammetry tools such as Meshroom and COLMAP do the same work far more automatically. Neither route gives measurement-grade dental models. For fit-critical work, use a lab or intraoral scanner.

Measuring before printing

Meshmixer’s Measure, Thickness and Stability checks are print-preparation checks, and so are the equivalents elsewhere: MeshLab’s measuring tools, the 3D Print Toolbox’s volume and area readouts in Blender. None of these programs is validated for clinical measurement. For orthodontic analysis on CBCT in a research setting, SlicerCMF’s Q3DC module measures 3D landmark distances and exports them to CSV.

Which one should you use

• Windows, occasional model prep, deadline tomorrow: keep using Meshmixer 3.5, installed only from Autodesk, and save work often.
• Mac or Linux, or you want a supported tool for repair: MeshLab.
• Daily trimming, basing and hollowing, and time to learn: Blender with the 3D Print Toolbox extension.
• Your STL comes from CBCT: 3D Slicer (add SlicerCMF for research measurement); 3DimViewer for a quick model on an older Windows PC.
• No scanner: Skanect or photogrammetry for teaching only; a lab scan for anything clinical.

For the wider picture of scanning, CBCT export and iTero tools, see our hub on free 3D mesh and scanning software for dental models.

FAQ

Is Meshmixer discontinued?

Yes. Autodesk’s listing says it is no longer in development and will not be supported. The last release is 3.5 from 2018, still offered free for Windows 64-bit.

What is the best free Meshmixer alternative for dental models?

For repair and simplification, MeshLab. For trimming, basing and hollowing, Blender with the 3D Print Toolbox. Both are free, open source and maintained on Windows, macOS and Linux.

Is there a Meshmixer for Mac?

Autodesk no longer offers a Mac installer. On a Mac, use MeshLab or Blender, both of which have Apple-silicon builds.

What does Autodesk recommend instead of Meshmixer?

Autodesk points users to Fusion, which includes mesh tools. It is commercial CAD software, so it is not a free drop-in replacement.

Can Blender replace Meshmixer for dental work?

For model preparation, yes: it can cut, base, repair, hollow and export STL, and the 3D Print Toolbox adds print checks. Expect a longer learning period, and remember it has no dental-specific tools, just like Meshmixer.

Is there a free STL editor that also works with CBCT?

3D Slicer segments CBCT and exports STL, and 3DimViewer does the same in a simpler, older program. Clean the resulting mesh in MeshLab, Blender or Meshmixer before printing.

Last updated: 28 September 2026 · DentSoftPro editorial team. Licence, version and platform details are checked against each developer's official documentation; none of the tools listed here should be treated as a certified medical device unless its vendor says so.