Free 3D Mesh and Scanning Software for Dental Models

This page is for dental technicians, clinicians with an in-house printer and students who need to open, fix and print STL files from intraoral scans, desktop scanners or CBCT without buying a CAD licence. The short answer: for trimming a scan, adding a base, filling holes and exporting a printable model, Autodesk Meshmixer is still the quickest free tool on Windows, but Autodesk stopped developing it in 2018. For bone models from CBCT, create the STL first in 3DimViewer or in 3D Slicer with SlicerCMF. Scanning with a consumer depth sensor (Skanect) or from photos (insight3d) is fine for teaching, not for clinical models. OrthoCAD only makes sense if your practice scans with iTero.

None of these programs is a dental CAD system. None designs crowns, aligners or surgical guides, and none is validated for clinical measurement. They prepare, inspect and measure models; clinical design stays in your scanner’s or lab’s own software.

The short list

Autodesk Meshmixer: the default STL fixer, now frozen

Meshmixer handles the jobs most intraoral-scan STLs need before printing: cut away the ragged scan border with Plane Cut or a brush selection, smooth the boundary and extrude a flat base, run Analysis > Inspector to close holes and remove floating fragments, then use Make Solid, or Hollow with drain holes to save resin. It also reduces dense meshes and checks wall thickness. The limits are real: development ended with version 3.5 (2018), Autodesk says it will not be supported, the official listing offers only a Windows 64-bit installer, and there has never been a Linux build. It has no dental tools either: no margin lines, dies or base templates. Pick it on Windows for quick model preparation today, but keep a maintained fallback; we compare them in Meshmixer alternatives for dental STL work.

3DimViewer: CBCT to STL without a 3D suite

3DimViewer from 3Dim Laboratory opens CBCT DICOM series (including Planmeca multi-frame files since version 1.4), segments bone and teeth by density threshold, builds a surface model and exports STL or PLY. For a printed jaw model for teaching or case discussion, that is the whole job in a few steps. The last installers, 3.1.1 for 64-bit Windows and macOS, date from January 2017; the vendor lists only Windows Vista, 7 and 8, and the Mac package predates Apple silicon. Threshold segmentation picks up metal scatter and noise, so expect to clean the STL in a mesh editor. There is no implant planning or nerve tracing. If you only need to view CBCT, not export models, see our free DICOM viewers hub.

SlicerCMF: research measurement on CBCT models

SlicerCMF is a bundle of 3D Slicer modules from the DCBIA group (University of Michigan School of Dentistry and UNC Chapel Hill). It superimposes serial CBCT scans on the cranial base (CMFreg), measures 3D cephalometric landmarks with CSV export (Q3DC), clips models to matching regions and shows colour-coded surface distance maps between time points. You install it from the 3D Slicer Extension Manager; there is no maintained standalone installer. 3D Slicer itself exports segmentations to STL or OBJ from the Segmentations module. The limits: SlicerCMF code has not changed since April 2022, documentation is thin, and 3D Slicer’s licence says it is designed for research and has not been reviewed by the FDA. Pick it for postgraduate orthodontic or surgical research, not for day-to-day model printing. Other CBCT research tools are compared in our open-source CBCT imaging platforms hub.

Skanect: depth-sensor scanning for teaching

Skanect turns a Structure Sensor or Structure Core into a desktop scanner for casts, faces and objects, then makes the mesh watertight, crops away the table and exports STL, OBJ, PLY or VRML. It is shareware (conditionally free): the free mode is for non-commercial use and saves models at 5,000 polygons, enough for a visual reference but not for measuring teeth. Structure is phasing out maintenance and support in favour of its Apple app Structure Capture; the last version is 1.11.0 for 64-bit Windows and macOS, and GPU reconstruction needs an NVIDIA card. Consumer-sensor accuracy is far below any intraoral or lab scanner. Use it for a teaching collection of casts or a patient-education face scan, then clean the mesh in Meshmixer.

insight3d: photogrammetry for the classroom

insight3d builds a point cloud and a textured polygon model from overlapping photographs and shows each step on screen: feature matching, camera calibration, reconstruction and manual modelling. That makes it a useful way to show students why a photo-based model is not a measured dental model. As a working tool it is out of date: the only installer is 32-bit version 0.3.2 from July 2009, it runs out of memory on large photo sets, Linux users must compile it, and there is no Mac version. It is free and open source (the homepage states AGPL 3) and has no dental features. For photogrammetry that has to work, maintained open-source tools such as Meshroom or COLMAP automate far more of the process.

OrthoCAD: only for iTero practices

OrthoCAD is Align Technology’s Windows program for iTero study models. It opens cases from MyiTero and measures tooth widths with virtual calipers, space analysis, Tanaka-Johnston and Moyers predictions, Bolton ratios, arch dimensions and overjet/overbite, and it scores the ABO Discrepancy Index and Phase III grading. The installer (version 5.9.1.50 on itero.com) costs nothing to download, but the program works with iTero data and an iTero account, so we list it as shareware (conditionally free). There is no “OrthoCAD Lite” and no Mac version; models use Align’s 3DM format, and Align documents no import of other scanners’ files. Align’s manual identifies it as a medical device with a CE statement. If you do not scan with iTero, it is not the tool for you.

How to choose

1. Start from the data you have. A scan STL from an intraoral or lab scanner goes to a mesh editor (Meshmixer on Windows). A CBCT DICOM series goes to 3DimViewer for a quick bone model, or to 3D Slicer with SlicerCMF when you need measurements over time. iTero models for orthodontic analysis stay in OrthoCAD.
2. Check scale on import. Meshmixer works in its own units; measure a known distance before you trust any number or send a model to print.
3. Clean in a fixed order. Trim the border, remove islands and fill holes, build the base, make the model solid, hollow it for resin printing, check wall thickness, then export binary STL for the slicer.
4. Keep the original. Save the untouched scan export as the record and work on a copy. Remove patient names from file names before sending models outside the practice.
5. Do not use sensor or photo scans for fit. Skanect and insight3d models are illustrations. When accuracy matters, send the cast to a lab scanner.
6. Plan for discontinued software. Of the six programs here, only OrthoCAD is current vendor software, and SlicerCMF survives because it still builds inside current 3D Slicer. Test on a spare PC and decide in advance which maintained tool you will move to.

FAQ

Is Meshmixer still free, and can I still download it?

Yes. Autodesk still lists Meshmixer 3.5 as free on its Marketplace, as a Windows 64-bit installer. It is no longer developed or supported. Get it only from Autodesk: several look-alike “Meshmixer” websites are not run by Autodesk.

Can I use Meshmixer for dental models?

For model preparation, yes: trimming scans, adding a base, filling holes, hollowing and exporting STL for printing. It has no dental-specific tools and is not validated for designing appliances or restorations.

What free STL editor works on a Mac?

Autodesk no longer offers a Mac installer for Meshmixer. MeshLab and Blender are free, maintained and run on macOS; we compare them in our Meshmixer alternatives guide.

Where do I get the OrthoCAD download?

Align lists the OrthoCAD installer on the Software Downloads page of itero.com, currently version 5.9.1.50. You open cases by logging in to MyiTero and clicking the OrthoCAD button on the order.

Is Skanect still available?

Structure’s support site still lists Skanect 1.11.0 for Windows 64-bit and macOS, but maintenance and support are being phased out. The free mode is non-commercial and limits saved models to 5,000 polygons.

Can I make an STL from a CBCT scan for free?

Yes. In 3DimViewer, threshold the bone, create a surface model and export STL. In 3D Slicer, segment the structures and use Export to files in the Segmentations module. Clean the mesh before printing, especially around metal restorations.

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.