For most practices, choosing an intraoral scanner is not really about finding the single “best” device. It is about finding the scanner that best matches your clinical mix, team habits, software preferences, and tolerance for change.

That is why broad buyer’s guides often fall short. A scanner that feels ideal in a high-volume restorative office may be a poor fit for a startup practice, a multi-operatory group, or an office that wants fewer subscriptions and more open export options.

This comparison narrows the field to three current, well-known systems that many dentists actively evaluate: the 3Shape TRIOS 5 Wireless, the Medit i900, and the DEXIS IS 3800W. All three are modern scanners, but they solve different problems in different ways.

Instead of ranking them in the abstract, this guide looks at what matters in a real practice: ergonomics, mobility, tip management, software ecosystem, open workflow flexibility, and the kind of team each scanner tends to suit best.

What this comparison covers

This is a practical scanner comparison for general dentists, practice owners, office managers, and treatment coordinators who need to think beyond image quality alone. The devices compared here are:

3Shape TRIOS 5 Wireless
Medit i900
DEXIS IS 3800W

To keep the comparison useful and current, this article focuses on manufacturer-verified specifications and workflow features. It does not rely on rumor-based pricing, dealer bundle claims, or vague marketing language.

Quick takeaway

If you want the shortest version, here it is.

Choose TRIOS 5 Wireless if you want a polished wireless experience, strong guided scanning features, and a mature ecosystem that many practices already know well.
Choose Medit i900 if you want a very light scanner, open file export, and a platform that appeals to practices that like flexibility and control.
Choose DEXIS IS 3800W if you want a wireless scanner with open workflow options, gesture-based model control, and a compact handpiece that may fit restorative and implant workflows well.

That said, the better answer depends on what kind of friction you are trying to remove from your day.

At-a-glance comparison

Mobility and connection style

TRIOS 5 Wireless: Wireless scanner with three rechargeable batteries, a two-slot charger, and manufacturer-stated continuous scanning time of up to 66 minutes depending on use.
Medit i900: Wired scanner using USB-C Power Delivery cables.
DEXIS IS 3800W: Wireless scanner using dedicated 5 GHz Wi-Fi, with backup power cable support.

Weight

TRIOS 5 Wireless: 299 grams including battery.
Medit i900: 165 grams including medium tip.
DEXIS IS 3800W: 240 grams with battery.

Tip and sterilization details

TRIOS 5 Wireless: Autoclavable tip option and single-use sleeves; TRIOS 5/6 tips are listed at up to 100 autoclave cycles in support documentation.
Medit i900: Reusable tips in multiple sizes; manufacturer materials list up to 150 autoclave cycles.
DEXIS IS 3800W: Three interchangeable tip styles; tips can be autoclaved up to 110 times.

Open file workflow

TRIOS 5 Wireless: Outputs PLY, DCM, and STL files.
Medit i900: Export options include STL, OBJ, and PLY through Medit Link.
DEXIS IS 3800W: Open workflow with one-click export and support for STL and PLY, with DICOM digital impression transfer supported in DEXIS workflow materials.

Why ergonomics matter more than many buyers expect

Practices often focus on scan speed first. That matters, but scanner comfort has a bigger effect on adoption than many teams expect.

If a scanner feels bulky, nose-heavy, or awkward during posterior scanning, clinicians compensate. They change wrist position, move more slowly, or default to a limited set of cases. Over time, the scanner becomes a “sometimes” tool instead of the normal way the office works.

That is one reason the Medit i900 draws attention. At 165 grams including the medium tip, it is notably light. For clinicians who care about hand fatigue, especially those scanning multiple arches per day, that can be meaningful.

TRIOS 5 Wireless takes a different approach. It is not the lightest device in this comparison, but 3Shape positions it around balance, simplified handling, and pen-grip ergonomics. For many users, overall balance matters as much as raw weight.

DEXIS IS 3800W sits between them in weight at 240 grams with battery, but it adds a compact form factor and motion-based model control. That can reduce the need to keep reaching for a mouse during scanning, which some clinicians may find more efficient than the spec sheet alone suggests.

For office managers and buyers, the practical lesson is simple: do not treat weight as the only ergonomic metric. Ask who will scan most often, how many scans they do in a typical day, and whether they prefer cable-free movement or a lighter wired handpiece.

Wireless freedom versus wired simplicity

This is one of the clearest dividing lines in the category.

TRIOS 5 Wireless and DEXIS IS 3800W are built around wireless mobility. That matters in practices that share technology across operatories, run busy restorative schedules, or want a scanner to move where the patient is rather than where the cart is parked.

TRIOS 5 Wireless goes further in framing mobility as a practice-level feature. Its platform materials highlight scanning from any room using Wi-Fi, which can appeal to multi-op offices that want one scanner to serve several chairs.

DEXIS IS 3800W also leans into mobility, with dedicated point-to-point Wi-Fi and optional mobile hardware built around chairside use and patient engagement.

Medit i900 takes the opposite path. It is wired, which some buyers initially see as a drawback. In practice, that depends on the office. A wired scanner removes battery management, charging habits, and wireless troubleshooting from the equation. For some teams, that is not a limitation. It is operationally cleaner.

If your office tends to lose chargers, forget battery rotation, or prefer fewer moving parts, wired can still be the more dependable choice.

Sterilization and operatory turnover

Scanner hygiene should be evaluated as a workflow issue, not just a compliance box.

TRIOS 5 Wireless emphasizes a closed autoclavable tip design and the use of single-use sleeves over the scanner body. That setup may appeal to practices that want a highly standardized turnover routine with a clear barrier component.

Medit i900 uses reusable tips and lists large, medium, and small tip options. The stated autoclave durability of up to 150 cycles is worth noting for practices watching consumable replacement patterns over time. Small tip availability may also matter for pediatric, smaller-arch, or difficult-access situations.

DEXIS IS 3800W includes three interchangeable tip styles and lists up to 110 autoclave cycles. That gives teams a bit more room to tailor the scanner to posterior access or operator preference.

For practice owners, this is where the hidden comparison should happen: not “Which scanner is more hygienic?” but “Which scanner creates the least friction in our sterilization workflow?”

If your sterilization team likes simple repeatable protocols, TRIOS 5 may feel attractive. If your clinicians want more tip-size flexibility, Medit or DEXIS may stand out. If your office tracks accessory life closely, published tip reprocessing limits may influence long-term supply planning.

Open workflow and software flexibility

For many dentists, scanner choice is now software choice.

Practices that want freedom to work with multiple labs, export files easily, or avoid being boxed into a narrow restorative path often start their comparison here.

Medit has built much of its reputation around flexibility. Current support documentation shows export options for STL, OBJ, and PLY through Medit Link. That makes the i900 especially relevant for practices that want access to common open formats and a less locked-down workflow.

DEXIS makes a similar openness argument. IS ScanFlow materials describe one-click export, open workflow capability, and compatibility with CAD software that accepts STL files. DEXIS also highlights open-format transfer and integrations around lab communication and 3D printing workflows.

TRIOS 5 Wireless also supports open output formats, including PLY, DCM, and STL. But in many buyer conversations, TRIOS is evaluated not just for file export but for the broader 3Shape environment around scanning, communication, and treatment workflow.

The distinction is important. “Open” does not mean the same thing for every buyer. Some practices want easy file export. Others want a broader digital platform with more built-in structure. Neither approach is automatically better. It depends on how much control versus convenience your team wants.

Learning curve and team adoption

No scanner succeeds if only one doctor can use it well.

TRIOS 5 Wireless puts a lot of emphasis on guided use, including sensory cues and ScanAssist intelligent alignment. That can be valuable in practices that want to reduce rescans, make training easier, or support several users with different experience levels.

Medit i900 tends to appeal to users who want speed, simplicity, and lightweight handling without a heavy sense of software restriction. In practices with digitally curious clinicians, that can translate into fast buy-in.

DEXIS IS 3800W adds two-button handpiece control and gesture motion control for rotating the digital model. For some clinicians, this feels intuitive and efficient. For others, it may require a short adjustment period but then reduce dependence on keyboard-and-mouse interaction.

Office managers should pay special attention here. The right scanner is often the one that makes it easier to standardize delegation, training, and repeatable handoffs between doctor, assistant, and front-office communication workflows.

Which scanner fits which type of practice?

TRIOS 5 Wireless is a strong fit if you want:

A premium wireless workflow
Guided scanning features that may support consistency across users
A scanner that can move between operatories
A structured ecosystem rather than a bare-bones export tool

This is often the safer choice for practices that want a highly refined user experience and are comfortable investing in a broader digital platform.

Medit i900 is a strong fit if you want:

A very light handpiece
Open-format export flexibility
A wired scanner with fewer battery-management tasks
Tip-size options that may help with access and clinical versatility

This can be an excellent option for practical buyers who want digital capability without feeling overly locked into one workflow philosophy.

DEXIS IS 3800W is a strong fit if you want:

Wireless freedom with a lighter form factor than some wireless alternatives
Gesture-based model control
Open workflow and broad CAD compatibility
A scanner that balances mobility with restorative and implant-oriented workflow flexibility

This may be especially compelling for practices that want wireless scanning but still place a high value on open architecture and chairside efficiency.

Five questions to ask before you buy

Who will scan most often?
A solo owner-dentist may prioritize ergonomics differently than a practice where assistants scan all day.
Will the scanner stay in one operatory or move between rooms?
That answer alone can push you toward wireless or keep you happily wired.
Do you want platform structure or file flexibility?
Some practices want guided workflow. Others want open export and broad lab freedom.
How disciplined is your team with accessories and charging?
A wireless scanner only feels convenient if battery management is handled well.
What is your real first-year use case?
If you will start with crowns and clear aligner workflows, your needs may differ from a practice building toward implants, full-arch cases, or more in-house design.

The bottom line

There is no universal winner between TRIOS 5 Wireless, Medit i900, and DEXIS IS 3800W.

The TRIOS 5 Wireless is the best fit for practices that want a polished wireless experience, guided scanning, and a mature digital ecosystem.

The Medit i900 is the best fit for practices that value low handpiece weight, open exports, and a simpler wired setup that removes battery-related variables.

The DEXIS IS 3800W is the best fit for practices that want wireless mobility, open workflow capability, and a compact scanner with thoughtful chairside controls.

If you are making a shortlist for a real purchase decision, the next step is not reading another generic roundup. It is mapping the scanner to your actual workflow: who scans, where they scan, what gets exported, how sterilization runs, and what kind of platform your team will still be happy using six months after training.

That is the comparison that matters.