Sleeveless surgical guides: exoplan setup

Not long ago the metal sleeve was a mandatory element of any surgical guide. Today more and more clinics are moving to sleeveless guides — the sleeveless surgical guide, where the drill is guided by the body of the guide itself, without a bonded metal sleeve. The approach is also called keyless, and it is increasingly supported by guided surgery systems.

Let's look at what the term sleeveless means, how it differs from the classic sleeve-based scheme, why it is gaining momentum and how to set up such a protocol in exoplan.

What is a sleeveless surgical guide

In a classic guide the drill enters a metal sleeve, and accuracy is provided by interchangeable reduction keys for each bur diameter. In a sleeveless solution there is no sleeve: the guiding channel is printed or milled directly into the body of the guide, and the instrument is centered by the walls of that channel or by grooves on the drills themselves.

Hence the second name — keyless: the system is designed to work without a set of metal keys. The manufacturer builds the required tolerances into the geometry of the guide, and the exoplan CAD library knows what channel diameter and height to build for a specific drilling protocol.

Sleeve vs sleeveless: the real difference

Both schemes solve the same task — holding the axis and depth of drilling. What differs is the way it is implemented and what exactly you order for production.

• Sleeve guide: the body is printed, a metal sleeve is purchased and bonded separately, and reduction keys are used during the procedure.
• Sleeveless / keyless: the guiding channel is already in the model, no separate sleeve is needed, and the instrument set is shorter.
• A sleeve adds height to the construction — critical with limited interocclusal space in the posterior regions.
• Sleeveless simplifies logistics: no consumable sleeves and fewer items in the surgical kit.

At the same time, sleeve protocols remain a proven classic for fully guided surgery, and the choice between the schemes is increasingly dictated by the implant system itself rather than the technician's preferences.

Why sleeveless protocols are gaining popularity

The main driver is simplifying and reducing the cost of the workflow. Without metal sleeves the guide is cheaper to produce, and the surgical kit is more compact: some systems combine the guided and freehand stages in a single instrument case.

The second factor is ergonomics in narrow zones. Dropping the sleeve reduces the total height of "guide plus guiding element," which helps with limited mouth opening and work on molars. Finally, manufacturers' open digital workflows are increasingly designed directly around keyless logic.

How to set up a sleeveless guide in exoplan

In exoplan the type of guidance is set by choosing the surgical library and protocol at the Guide Design stage. The exoplan catalog includes more than 1200 surgical guide libraries, and some of them already contain sleeveless or keyless variants.

For a hybrid case, TRI Dental TRX is suitable — this library supports both sleeve and sleeveless design within the TRX Guide Creator System. For a fully keyless approach, look at protocols like Straumann VeloDrill, where drilling is built around the proprietary instrument system.

In practice the order is as follows: you choose the implant system and its surgical kit, then the drilling protocol (pilot, partially or fully guided), after which exoplan builds the guiding channel for the declared geometry. If the library is keyless, the field for a separate sleeve simply will not appear.

Which systems support working without sleeves

Brands approach sleeveless differently, so check the specific line. A few reference points from the DentalLibs catalog.

• BioHorizons — the BioHorizons Pro line is declared as keyless guided surgery with an open digital workflow.
• TRI Dental — the TRX system with support for sleeve and sleeveless in a single library.
• Straumann — protocols based on VeloDrill for guided and partially guided drilling.
• Nobel Biocare — Nobel Biocare Active series kits within NobelGuide.

It's important not to confuse a keyless protocol with a regular implant library: guide design requires the surgical guide library of the corresponding system, not just the implant model.

What to watch out for when switching to sleeveless

The sleeveless scheme forgives fewer liberties with the instrument. Guidance is provided by the plastic or milled channel, so wear and print accuracy directly affect the result.

• Use only the drills and protocol declared by the manufacturer for keyless mode.
• Control the material and calibration of the printer: a channel without metal is more sensitive to deviations.
• Check construction height and access in the posterior regions already at the planning stage.
• Verify the exoplan library version against the current system protocol.

Frequently asked questions about sleeveless guides