A cone beam CT is the most expensive imaging device most general practices will ever buy, and the used market for them is real. Practices upgrade, retire, merge, and close, and the units they leave behind can often be bought for a fraction of new. The trap is that a CBCT is not one purchase. It is a machine, a software license, a workstation, a room, and a set of state compliance steps, and the seller usually owns only some of those things.
This guide assumes you already understand panoramic imaging basics (if not, start with our panoramic X-ray buying guide). Here we go deeper into the parts of a used cone beam deal that decide whether it is a bargain: licensing, regulatory steps, hidden wear, and total installed cost.
Key takeaways
- Get the software license question answered in writing, from the manufacturer, before you negotiate price. At least one major maker does not transfer licenses when a unit moves to a new office.
- Most states treat CBCT as radiation-producing equipment that must be registered, and many require a shielding plan and physicist testing before first patient use. Call your state program first.
- The X-ray tube and the flat panel detector are the expensive wear items. Ask for scan counts and calibration history, not just the unit's age.
- Budget the full installed cost: purchase, licenses, rigging, installation, calibration, shielding, physicist survey, workstation, and training. The purchase price is often the smaller half.
- Confirm the unit is still supported with parts and software, and that a factory-trained technician will install it.
What a CBCT is and how it differs from a panoramic unit
A dental cone beam unit rotates an X-ray source and a flat panel detector around the patient's head in a single sweep, capturing hundreds of two-dimensional projections. Reconstruction software turns those projections into a three-dimensional volume made of voxels, which the dentist can slice and view in any plane. Most dental CBCT units are combination machines that also take conventional panoramic images, and many offer a cephalometric arm as an option.
That combination design is why used units show up so often. A practice that bought a 2D panoramic machine and later upgraded to 3D, or bought an early 3D unit and later moved to a larger field of view, has a machine to sell. Common names you will see on the used market include Planmeca (ProMax 3D series and the newer Viso line), Carestream Dental (CS 8100 3D, CS 8200 3D, CS 9600), Dentsply Sirona (Orthophos 3D models), Vatech (the Green series), and DEXIS (OP 3D models and the i-CAT line).
What makes a CBCT different from a pan, from a buyer's point of view, comes down to three things:
- The software does much more of the work. Reconstruction, viewing, implant planning, and export all depend on licensed software that is often tied to the unit's serial number or the original owner.
- The detector is larger and more expensive. It is the most valuable single component, and it is sensitive to handling and calibration.
- The regulatory footprint is heavier. States that treat a pan as routine often treat CBCT as computed tomography with its own testing and quality assurance expectations.
The software license question comes first
If you remember one thing from this guide, make it this: do not agree on a price for a used CBCT until you know, in writing, what it will cost to license the software in your name at your location.
Manufacturers set their own rules, and the rules are not always what a seller assumes. As one concrete example, Planmeca's own customer service reference (as of late 2025) described the policy for its Romexis software this way: when equipment stays at the office where it was purchased, such as when a practice is bought out, the license can move to the new owner with a name change. When a unit leaves that office in a doctor-to-doctor sale, the license does not transfer and the buyer must purchase new licensing. That single distinction can move the real cost of a used unit by a meaningful amount.
Other manufacturers handle this differently, and policies change. Some tie licenses to the original purchaser, some charge a transfer or relicensing fee, some require a paid inspection before they will support a secondhand unit, and some will only activate software through an authorized dealer. Warranties almost never follow the machine to a second owner automatically.
Call the manufacturer or its authorized dealer with the unit's serial number and ask four questions: Is this unit still supported? What does it cost to license the acquisition and viewing software to a new owner at a new address? Is there an inspection or recertification fee? Which software version will it need, and will that version run on a current operating system? Get the answers by email.
Also sort out what software you actually need. The acquisition software that drives the unit is one thing. Implant planning, surgical guide design, airway analysis, and extra viewing seats are often separate modules or separate licenses. A seller may describe a unit as "fully loaded" because their license included modules that will not come with the sale.
Regulatory and room requirements before you commit
In the US, the FDA regulates CBCT manufacturers under both the medical device rules and the electronic product radiation control provisions. The people who regulate you, the owner and user, are mostly at the state level, through the state radiation control program. Requirements vary a great deal, so the specifics below are illustrations of what to expect, not a list of your obligations.
What states commonly require
- Registration. Most states require radiation-producing equipment to be registered with the state program, and a unit being moved into a new facility usually needs new or updated registration.
- A shielding plan. Many states require a qualified expert, typically a health or medical physicist, to review the room and calculate shielding before installation. Some require the state to approve the plan before construction or installation proceeds.
- Acceptance or post-installation testing. Some states require a physicist survey or equipment performance evaluation after installation and before patient use.
- Ongoing quality assurance. Requirements range from following the manufacturer's QA protocol to state-specific programs. New Jersey, for example, requires an initial and annual physicist QC survey for dental CBCT under an alternative QA program, with certain tests performed by staff in between.
- Vendor registration. Some states require the company that sells, installs, or services X-ray equipment to be registered in that state. An out-of-state installer may not be.
- Operator credentials. Who can take a CBCT scan is set by state law and your dental board, and it may differ from who can take a pan.
A 2024 ADA expert panel report on radiation safety recommends that CBCT units be evaluated at least every two years and preferably annually, and that CBCT not be used as the first-line imaging choice when a lower-dose option would answer the clinical question. The same report stated that thyroid collars and abdominal shielding are no longer recommended during dental imaging. Your state's rules still control, so check them. For the mechanics of registration and inspection, see our guide to dental X-ray registration and inspections.
The room itself
Before you buy, confirm the room will physically take the unit: footprint, rotation clearance, ceiling height, wall or floor mounting requirements, wheelchair access, a dedicated electrical circuit to the manufacturer's spec, and network cabling to the workstation. A cephalometric arm adds width. If the room was designed for a pan, it may not have the shielding a CBCT plan calls for. See dental office buildout and operatory design for how imaging rooms fit into a buildout.
This is general information, not legal or regulatory advice. Confirm current requirements with your state radiation control program and dental board before you buy.
What to inspect on a used CBCT
You cannot judge a cone beam by looking at it. The components that matter most are inside the covers or inside the software. The inspection is mostly a document and data exercise, followed by a live scan if at all possible.
The X-ray tube
Tube life is consumed by exposures, not by calendar years. A three-year-old unit in a busy implant practice can have used more of its tube than a seven-year-old unit in a practice that scanned a few times a month. Many units log exposure or scan counts in their service menus. Ask the seller to have their service technician pull that data, and ask whether the tube has ever been replaced.
The detector
The flat panel detector is the most expensive part to replace. Detectors can drift out of calibration when a unit is moved, stored in poor conditions, or serviced incorrectly, and a used unit may need a full recalibration by an authorized technician after installation. Ask for the calibration history and whether the unit was calibrated after any prior move.
The QA phantom and accessories
Manufacturers supply phantoms and calibration tools for quality assurance. They go missing constantly when practices close, and replacing them can cost real money. Confirm the phantom, bite blocks, chin rests, ear rods, ceph components if applicable, and any calibration tools are included.
The workstation and software version
Reconstruction is computationally heavy, and older units often ran on workstations with older operating systems. Find out which software version the unit runs, whether the manufacturer's current version supports that hardware, and whether the workstation meets current specs. A unit that only works with an unsupported operating system is a security and compliance problem, not just an inconvenience.
Used CBCT inspection checklist
- Manufacturer confirmation that the model is still supported for parts and software
- Written quote for software licensing to you at your address, including any transfer or inspection fee
- Tube exposure or scan count pulled from the unit's service data, plus any tube replacement history
- Detector calibration history, including after any previous relocation
- Full service log and error history from the seller's service provider
- Recent sample scans from this exact unit at the field of view you plan to use
- QA phantom, calibration tools, positioning accessories, and ceph arm (if listed) present
- Software version, operating system, and workstation specs documented
- Field of view and voxel options confirmed against your intended procedures
- Deinstallation by a factory-trained technician, with the unit properly secured for transport
- Installer registered in your state and authorized by the manufacturer
- State registration, shielding plan, and testing requirements confirmed for your room
For how an independent inspection works in general, see what to expect from a dental equipment inspection, and run the full pre-purchase equipment checklist alongside this list.
Field of view and configuration: matching the unit to your work
The single biggest specification choice is field of view (FOV), the size of the volume captured in one scan. Buying a used unit with the wrong FOV is an expensive mistake because you cannot upgrade it cheaply, if at all. The categories below are general; exact volume sizes vary by model.
| FOV class | Typical coverage | Common uses | Buyer notes |
|---|---|---|---|
| Small | A few teeth or a sextant | Endodontics, localized implant sites, impacted teeth | Often highest resolution; limited for full-arch planning |
| Medium | One or both arches | Implant planning, third molars, general diagnostics | The most common general-practice choice |
| Large | Both jaws plus more of the skull, airway, TMJ | Orthodontics, orthognathic, airway, full-arch surgery | More incidental anatomy in each scan, which raises the reading burden |
| Combo with ceph | Pan and 3D plus lateral ceph | Orthodontic practices | Ceph arm adds width and value; confirm it works and is licensed |
A larger field of view captures more anatomy, and the dentist is generally responsible for the whole volume that was captured. Some practices send large-volume scans to an oral and maxillofacial radiologist for a read. That is a clinical and professional liability decision to make with your own advisors and malpractice carrier, but it belongs in your cost planning.
Red flags that should stop or reprice the deal
Walk away or renegotiate if you see any of these:
- The seller cannot or will not give you the serial number before you pay.
- The seller says the software "comes with it" but has nothing in writing from the manufacturer.
- The unit was already disconnected by the practice's staff, a general contractor, or a mover rather than a trained imaging technician.
- No service records, no calibration history, and no way to pull tube data.
- The workstation runs an operating system the manufacturer no longer supports and there is no upgrade path.
- The unit came from outside the US or has unclear ownership history, which can block manufacturer support.
- The price is far below comparable units with no explanation. With CBCT, the usual explanation is licensing, a failing detector, or an unsupported model.
If you are buying through an online listing rather than a dealer, read how to buy on eBay and Facebook Marketplace without getting scammed before you send a deposit.
Cost considerations: the installed number, not the sticker
Published reseller ranges give a sense of scale. One national reseller lists new dental CBCT systems at roughly $60,000 to $120,000 depending on brand, software, and field of view, and used or refurbished systems at roughly $20,000 to $60,000. Treat those as rough market signals. Actual prices vary widely by model, age, FOV, condition, whether a ceph arm is included, region, and year, and a unit sold "as is" from a closing practice prices very differently from a refurbished unit with installation and warranty.
The purchase price is only one line. Here is how the total usually breaks down:
| Cost line | What drives it | How to pin it down |
|---|---|---|
| Purchase price | Model, age, FOV, ceph, condition, seller type | Compare several listings of the same model |
| Software licensing | Manufacturer policy, modules, relocation | Written quote from manufacturer or dealer |
| Deinstall, crating, freight | Distance, access, weight, stairs | Quote from imaging-experienced movers |
| Installation and calibration | Authorized technician time, travel, detector recalibration | Quote from authorized installer |
| Shielding plan and construction | Room, adjacent spaces, state rules | Physicist plan, then contractor quote |
| Physicist testing and registration | State requirements | Call your state program and a local physicist |
| Workstation and IT | Software specs, network, PACS or backups | IT vendor quote to manufacturer specs |
| Training and service plan | Manufacturer or dealer offerings | Ask what is available for secondhand units |
Hypothetical example (illustrative numbers only): a practice finds a medium-FOV combination unit listed at $38,000. The manufacturer quotes $9,000 to license software to a new owner at a new address. Deinstall and freight come to $3,500, installation and recalibration to $6,000, a shielding plan and minor construction to $5,500, physicist testing and registration to $1,500, and a new workstation to $4,000. The installed cost is $67,500, not $38,000. If a refurbished unit of the same model with licensing, installation, and a warranty is quoted at $65,000, the "cheap" unit is not cheaper. Your real numbers will differ; the point is to build the whole column before you compare.
Financing and tax treatment can change the math as well. See leasing vs. financing vs. cash and Section 179 and bonus depreciation for dental equipment, and confirm the tax side with your CPA.
Deinstallation and transport: where good units get ruined
A CBCT is heavy, top-heavy, and precise. Rotating assemblies need to be locked, detectors protected, and columns secured according to the manufacturer's transport procedure. A unit that was tipped, dropped, or moved without its transport locks can arrive with alignment problems that do not show up until the first scan. Ask who will deinstall it, whether that person is trained on the model, and how it will be crated. Our guides to disconnecting equipment safely and shipping dental equipment cover the general principles.
Used, refurbished, or new
A used unit bought directly from a practice is the lowest price and the highest risk. A refurbished unit from a dealer typically costs more but may include licensing, installation, calibration, and some warranty, which is exactly where used CBCT risk lives. A new unit carries full warranty and current software but the steepest depreciation. The labels mean different things from seller to seller; see refurbished vs. used vs. new for how to read them.
There is also a middle path worth asking about: if you are buying a practice that already has a CBCT, and the unit stays in place, licensing may be far simpler than moving a unit across town. That is one more reason to raise imaging equipment early in practice acquisition due diligence.
A practical buying sequence
- Decide the field of view and features your procedures actually require.
- Call your state radiation control program and learn the registration, shielding, and testing steps for your room.
- Shortlist units and get serial numbers.
- Get written licensing and support answers from each manufacturer.
- Collect service data: scan counts, calibration history, error logs, and sample scans.
- Build the installed-cost column for each option, including a refurbished or new comparison.
- Only then negotiate price, and make the deal contingent on successful installation and calibration where you can.
When you are ready to look, browse current imaging listings on the ChairsideSource marketplace, and use the pre-purchase checklist and our hidden costs guide to keep the full number in view. If digital intraoral imaging is also on your list, see our digital X-ray sensor buying guide.
Educational content only. It is not legal, financial, tax, or clinical advice. Prices and ranges are approximate and vary by region, condition, and year. Verify current rules with your state dental board and qualified professionals. ChairsideSource is not affiliated with any manufacturer, the ADA, or the DAT.