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3i compatible external hex abutment selection guide

Biomet 3i External Hex Compatible Abutment Selection Guide

A step-by-step guide to selecting the correct Titan compatible abutment for T3, Osseotite, Full Osseotite, Nanotite, and classic Biomet 3i external hex implants. All share the same prosthetic connection — the seating surface diameter is the only variable that determines which components you need. Covers seating surface identification, abutment type selection, emergence profile, and collar height.

Watch the terminology trap: “Osseotite” refers to the implant’s surface, found on BOTH the 3i external hex and the 3i Certain internal connection. A “3i Osseotite” implant is external hex; an “Osseotite Certain” is internal — components are NOT interchangeable between the two connections. If your implant is a Certain internal hex, use the 3i Certain guide instead. Confirm your connection before ordering — this is the most common 3i ordering error.

External Hex T3 · Osseotite · Nanotite · Full Osseotite hex sits ABOVE the platform Certain Internal Hex Osseotite Certain · Certain PREVAIL hex RECESSED inside
“Osseotite” is a surface, not a connection. It appears on both. Components never interchange between them.

STEP 1: IDENTIFY YOUR SEATING SURFACE

The 3i external hex system uses four seating surface diameters. The seating surface is determined by the implant body diameter — check the surgical record or implant packaging.

3.4mmseating surface3.25mm body · Titan code: purple
4.1mmseating surface4.0mm body · Titan code: blue
5.0mmseating surface5.0mm body · Titan code: yellow
6.0mmseating surface6.0mm body · Titan code: green

Colour is our catalog shorthand, not an implant marking. Physical colour coding of the prosthetic table is a Certain feature. External hex fixtures are identified by seating surface in millimetres — read the surgical record, not a colour.

Seating Surface Implant Body Ø Implant Lines
3.4mm 3.25mm T3, Osseotite, Full Osseotite, Nanotite, Osseotite NT (Narrow Thread)
4.1mm 4.0mm, 4.0/3.0mm (platform-switched 4/3) T3, Osseotite, Full Osseotite, Nanotite
5.0mm 5.0mm, 5.0/4.0mm (platform-switched 5/4) T3, Osseotite, Full Osseotite, Nanotite
6.0mm 6.0mm, 6.0/5.0mm (platform-switched 6/5) T3, Osseotite, Full Osseotite

Platform-switched implants (4/3, 5/4, 6/5): The second number is the seating surface. A “5/4” implant has a 5.0mm body but a 4.0mm seating surface — use 4.1mm platform components, not 5.0mm.

Step 2: Choose Your Abutment Type

Titan manufactures multiple abutment types for the 3i external hex. Your choice depends on the restoration type and clinical situation:

  • Straight Locking Abutment (SLIAF): The most common choice for cement-retained single-unit crowns. External hex engages the implant for anti-rotation. Multiple collar heights and emergence profiles available.
  • Simple Step Abutment (Titan Design): A one-piece screw-retained abutment that can be prepared chairside or in the lab. Available for 4.1mm and 5.0mm platforms.
  • Post Abutment: Non-engaging abutment for multi-unit or splinted restorations where anti-rotation is provided by the framework rather than the individual abutment. (See the engaging vs. non-engaging guide.)
  • Castable / UCLA Plastic Sleeve: Burnout-compatible for custom cast frameworks. Available in hex (engaging) and non-hex (non-engaging) configurations.
  • Temporary Abutment: For provisional restorations during healing. Textured surface for acrylic retention.
  • Ball Head Abutment: For overdenture retention using O-ring housings.

Every type above is stocked across the 3.4, 4.1, 5.0 and 6.0mm seating surfaces. See the full range with photographs below →

Step 3: Select Emergence Profile & Collar Height

For straight locking abutments and similar restorative abutments:

gingival crest Emergence profile diameter match to the cervical diameter of the tooth replaced Collar height seating surface
Collar too short traps cement. Collar too tall shows metal. Set the shoulder at or just below the gingival margin.
  • Emergence profile diameter: Match to the cervical diameter of the tooth being replaced. Narrower for anteriors, wider for posteriors. The abutment should support the papillae without encroaching on them.
  • Collar height: Measure tissue depth from the implant platform to the gingival crest. Select a collar height that places the abutment shoulder at or just below the gingival margin. Too short = cement trap. Too tall = visible metal.

Full measurement method in our abutment sizing guide.

Titan offers more collar height increments and profile diameter options than the OEM catalog for the 3i external hex, allowing finer adjustment without custom fabrication.

Step 4: Engaging vs. Non-Engaging

The 3i external hex connection offers both engaging and non-engaging component options:

Engaging (hex) indexes on the hex — single units Non-engaging (non-hex) free to rotate — splinted frameworks
Divergent implant angles make simultaneous hex engagement impossible, which is why splinted frameworks use non-engaging components.
  • Engaging (hex): The component’s internal hex indexes onto the implant’s external hex, locking rotational position. Use for single-unit restorations where anti-rotation is critical.
  • Non-engaging (non-hex): The component does not index onto the hex, allowing rotational seating freedom. Use for multi-unit or splinted frameworks where divergent implant angles make simultaneous hex engagement impossible.

Rule of thumb: Single-unit = engaging. Multi-unit/splinted = non-engaging for the framework, engaging for the individual impression copings during the impression phase.

The Titan External Hex Range

Every component below is machined at our facility in Bergenfield, New Jersey from Grade 23 ELI titanium (Ti-6Al-4V ELI, ASTM F136) and is FDA-cleared.

The Simple Step Abutment — a Titan design

The Simple Step is our own design, not a copy of an OEM part. It is a one-piece, screw-retained abutment with a stepped body: it seats and torques like a stock abutment, but the steps give defined reference planes to reduce to, rather than a smooth cone that has to be shaped freehand. Available for the external hex 4.1mm and 5.0mm platforms.

Titan Simple Step Abutment T-4ESA for Biomet 3i external hex 4.1mm platform Simple Step Abutment, stepped body
Simple Step Abutment emergence profile levels 1, 2 and 3 with collar height options Three emergence profile levels × collar height range

What “prep height” means

Prep height is the vertical height of abutment left standing after preparation — the part the crown actually seats on. It is not the collar height, and it is not the total length of the component.

It is governed by the space available in occlusion. Measure from the gingival crest at the implant site to the opposing tooth with the patient closed, then subtract 3mm: roughly 1.5mm for the restorative material and 1.5mm of clearance. What remains is the height you prepare to.

opposing tooth gingival crest 3mm reserved crest to opposing PREP HEIGHT Crest-to-opposing − 3mm = prep height    (approx. 1.5mm restorative material + 1.5mm clearance)
Prep height is what the crown seats on, measured in occlusion. It is not the collar height and not the total length of the component.

Prep height: what goes wrong at the extremes

The two failure modes pull in opposite directions. Prepare too tall and the crown cannot seat in occlusion, or the ceramic ends up too thin and fractures. Prepare too short and there is not enough axial wall to retain a cemented crown, and it comes off repeatedly.

Too tall Correct Too short no room for crown crown space too little axial wallcrown de-cements occlusal interference, thin ceramic retention and material thickness both met poor retention, repeated de-cementation
The two failure modes pull in opposite directions, which is why the measurement is taken in occlusion rather than estimated.

Selecting prep height, in order

1Measure in occlusionWith the patient closed, measure from the gingival crest at the implant site to the occlusal surface of the opposing tooth.Crest → opposing tooth
2Subtract 3mmRoughly 1.5mm for restorative material and 1.5mm of clearance. What remains is the height to prepare to.Measurement − 3mm
3Check retentionShort preparations retain poorly. If the result leaves very little axial wall, consider a screw-retained design instead of cement.Enough axial wall?
4Reduce to the stepOn the Simple Step, reduce to the nearest step rather than cutting freehand — the steps are the reference.Cut to the step

Where the stepped body earns its keep. On a smooth-coned abutment, hitting a target prep height means measuring, cutting, re-measuring and cutting again — and two technicians rarely land in the same place. The Simple Step gives defined planes: identify the height you need, reduce to that step, stop.

It also makes the decision reversible in the lab rather than in the mouth. A tissue-model impression taken with a transfer coping lets the technician choose the step against the actual soft-tissue form.

What an emergence profile diameter is

The emergence profile diameter is the width of the abutment where it exits the soft tissue — the flared shoulder. It is not the platform, and it is not the prepared height.

It exists to solve a geometry problem. An implant platform is a circle, 3.4 to 6.0mm. The tooth being replaced is not a circle, and at the cervical margin it is usually much wider — a first molar can run 9 to 11mm mesio-distally. Something has to bridge round-and-narrow to tooth-shaped-and-wide. That transition is the emergence profile: the form the soft tissue heals around and the crown rises out of.

soft tissue final crown platform 3.4–6.0mm EMERGENCE PROFILE round & narrow tooth-shaped & wide
The implant platform is a small circle. The tooth being replaced is not. The emergence profile is the transition between them — the shape the tissue heals around and the crown rises from.

Emergence profile: what goes wrong at the extremes

Too narrow Correct Too wide ridge lap supported papillae impinges on roots unsupported tissue, food trap tissue held, nothing compressed blanching, recession risk
The profile should hold the papillae up without pressing on them. Blanching at try-in means it is too wide.

Three levels on every platform

Three levels on every platform — same implant, different emergence Level 1 narrowest · anteriors Level 2 premolars Level 3 widest · molars platform
Emergence profile is independent of platform. A single 4.1mm implant can take level 1, 2 or 3 — which is why stocking one profile per platform forces a compromise on every case that does not match it.

Selecting emergence profile, in order

1Find the ceilingMeasure between the proximal surfaces of the adjacent teeth. At least 1mm must remain between the flare and each root.Space − 2mm = maximum
2Match the toothUse the cervical diameter of the contralateral tooth as the reference. Anterior narrow, posterior wide.Contralateral cervical Ø
3Pick the levelLevel 1 narrowest, level 3 widest. If more than 1mm clearance remains each side, move up a level.Level 1, 2 or 3
4Check the papillaeThe profile should hold the tissue up without pressing on it. Blanching at try-in means too wide.No blanching = correct

Why this matters when you are choosing a supplier. Emergence profile is independent of platform, so a complete range means three levels on each seating surface, at every collar height. Stock one profile per platform and every case that does not match it becomes a compromise — or a custom mill. Titan carries the grid.

Selecting collar height from tissue depth

Match collar height to tissue depth6.0mmtissue depth6.0mm5.0mmtissue depth5.0mm4.0mmtissue depth4.0mm3.0mmtissue depth3.0mm2.0mmtissue depth2.0mm1.0mmtissue depth1.0mmDeeper tissue → taller collar. Subtract ½ to 1mm so the collar finishes just below the crest.
Collar height is selected from measured tissue depth, then reduced slightly so the margin finishes below the gingival crest.

Where buccal and lingual tissue depths differ and you want the margin to follow the gingival contour, modify the collar rather than accepting a flat margin.

Tip. The best results come from a tissue-model impression taken with a transfer coping. The lab can then select and modify the abutment against the actual soft-tissue form rather than a measurement taken in the mouth.

Simple Step abutment selection and preparation, demonstrated.

Supplied with titanium screw.

Straight Locking Implant Abutments — all four platforms

The workhorse for cement-retained single units. The internal hex indexes on the implant’s external hex for anti-rotation, and Titan stocks more collar height and emergence profile increments than the OEM range — so the abutment is matched to the tissue rather than the tissue accommodated to the abutment.

Multi-Unit and Transmucosal Abutments

For screw-retained bridges and full-arch work, where the restoration is carried by the framework rather than by each individual abutment.

Engaging and non-engagingEngaging where a single unit needs anti-rotation, non-engaging where divergent angles make simultaneous hex engagement impossible.
Transmucosal two-pieceCarries the restorative connection above the tissue, simplifying hygiene access and impression taking on deep sites.

The Conical Abutment System — complete, not partial

This is where a compatible supplier usually falls short: the abutment exists, but the analog, coping or sleeve does not, and the lab is left mixing brands mid-case. Titan carries the whole conical chain for the 4.1/5.0mm and 6.0mm platforms.

Bar post for laser-welded frameworks, impression coping with long screw for open-tray, stainless lab analog, and a burnout UCLA sleeve for custom casting. One supplier, one tolerance standard, across the entire case.

Post Abutments — restorative vs bite registration

Both are one-piece, non-engaging posts for the 4.1mm platform, and they look similar on the shelf. They do different jobs, and ordering the wrong one costs an appointment.

T-4PA — stays in the case T-4PABR — comes back out provisional or multi-unit restoration the restoration is built on it registration material rigid vertical reference, then removed
Both are non-engaging one-piece posts. The difference is the job: one carries the restoration, the other captures the bite.

T-4PA — the restorative post

For multiple-unit restorations and provisional temporaries. It can also take an impression directly, without a separate impression post, analog and the rest of the transfer chain — useful when the case does not warrant a full impression protocol.

Two things to know before you use it.

There is no thread timing and no anti-rotation feature, so the work is done intraorally rather than indexed on a model.

Check occlusal height on the model first, and create a flat wall so the index is known.

T-4PABR — the bite registration post

A dedicated registration component, sometimes called a bite verification cylinder. Its job is to create a rigid vertical reference at implant level so the patient’s bite transfers accurately to the articulator — then it comes back out. It is not what the restoration is built on.

Most valuable on multi-unit bridges and full-arch cases, where a soft or flexing registration compounds across the span and the framework does not seat. Using a post designed for the job removes a source of error and shortens the appointment.

Which one

If you are… Use
Building a provisional or multi-unit restoration T-4PA
Taking an impression without the full transfer chain T-4PA
Recording the bite for articulator mounting T-4PABR
Verifying vertical dimension across a full arch T-4PABR

Bar Posts and Laser-Welded Frameworks

Bar posts seat on each implant and are then laser-welded to a bar, forming one rigid splinted framework. Because the posts are non-engaging, divergent implants can seat simultaneously — the bar supplies the anti-rotation the individual posts do not.

Bar posts → laser-welded bar → splinted framework bar laser weld joints overdenture or fixed framework rides the bar Non-engaging posts let divergent implants seat simultaneously; the bar provides the anti-rotation.
Bar posts are consumed into the framework. They are ordered per implant, not per case.

They are ordered per implant rather than per case, and they are consumed into the framework. Titan stocks them for each seating surface, for the conical and standard abutment platforms, and as the dedicated T-IOL post for immediate occlusal loading — a purpose-made post for cases where a provisional framework is welded and placed in the same visit, rather than adapting a standard component.

Immediate loading protocols depend on primary stability and case selection. The component supports the technique; the clinical decision remains the clinician’s.

Overdenture Ball Head System — 3.4, 4.1 and 5.0mm

A complete overdenture attachment system rather than an abutment alone. Ball head abutments are stocked for the 3.4, 4.1 and 5.0mm seating surfaces, each supplied with metal housing and two O-rings — and the keeper, replacement O-rings, seating wrench and lab analog are all stocked too, so a reline or a retention change does not become a sourcing exercise.

A ball attachment is a stack, not a single part, and the retention does not live in the abutment. Understanding the stack is what makes the difference between ordering one component and ordering the case.

How the overdenture attachment stacks up denture base metal housing — cured into the denture rubber O-ring — the retention, replaceable ball abutment — torqued into the implant implant snaps together
Retention lives in the O-ring, not the abutment — which is why the O-rings, keeper and wrench matter as much as the abutment itself.

The ball abutment torques into the implant. The metal housing is cured into the denture base. Between them sits the rubber O-ring, which provides the retention and is the part that wears — which is why replacement O-rings, the keeper and the seating wrench are stocked alongside the abutment.

Standard Abutment Restorative Chain

The same completeness applies to the standard abutment platform: impression coping, lab analog, burnout sleeve and non-engaging bar post, all matched.

Instruments: the Locator Pin and One-Driver System

The Titan Implant Locator Pin threads into the implant by hand and holds the abutment or coping in parallel alignment while it is seated — particularly useful in posterior sites with limited visibility, and in the lab, where it lets a wax-up lift on and off the analog without shifting. Guide pins are stocked in 20, 22, 24 and 26mm lengths.

Across the external hex range Titan uses a single 0.050″ (1.27mm) hex driver. One driver on the tray, one driver in the lab, rather than a different interface for every component family.

Why the breadth matters.

Most compatible suppliers stock the fast-moving abutments and leave the analogs, copings and bar posts to someone else. That is how a case ends up assembled from three vendors with three tolerance standards. Titan machines the whole chain for each platform in Grade 23 ELI titanium (Ti-6Al-4V ELI, ASTM F136), FDA-cleared, in Bergenfield, New Jersey.

In-stock components ordered before 4:00 PM ET ship the same business day. Not sure which part fits? Call 1-201-439-0470.

Frequently Asked Questions

How do I identify the seating surface on a 3i external hex implant?

Seating surface is determined by implant body diameter: 3.25mm body = 3.4mm seating surface, 4.0mm = 4.1mm, 5.0mm = 5.0mm, 6.0mm = 6.0mm. For platform-switched implants (4/3, 5/4, 6/5), use the second number.

When do I use engaging vs. non-engaging components?

Engaging (hex) for single-unit restorations where anti-rotation is needed. Non-engaging for multi-unit or splinted frameworks where divergent implant angles prevent simultaneous hex engagement.

Is my “3i Osseotite” implant external hex or Certain?

“Osseotite” is a surface treatment used on both connections. A “3i Osseotite” implant is external hex; an “Osseotite Certain” is internal hex. Check the surgical record for “Certain” — if it doesn’t say Certain, it’s external hex.

Quick Reference

Decision Determined By Key Rule
Seating Surface Implant body diameter (from surgical record) 3.4, 4.1, 5.0, or 6.0mm. Platform-switched implants: use the second number.
Abutment Type Restoration design SLIAF for cement-retained single units. Simple Step for preparable screw-retained. Post abutment for multi-unit. Castable for custom cast frameworks.
Profile & Collar Tooth being replaced & tissue depth Profile = cervical diameter of replaced tooth. Collar = tissue depth, shoulder at gingival margin.
Engaging vs Non Single-unit vs multi-unit restoration Single-unit = engaging. Splinted/multi-unit = non-engaging.

Browse all 3i external hex compatible components in our Biomet 3i External Hex category. Questions? Call 1-201-439-0470.

Have the OEM part number? Call 1-201-439-0470 — we’ll cross-reference it to the Titan equivalent before you order.

Disclaimer: Biomet 3i®, T3®, Osseotite®, Nanotite®, and ZimVie® are registered trademarks of ZimVie Inc. and/or its affiliates. Titan Implants, Inc. is an independent manufacturer of compatible prosthetic components. This guide is for informational purposes and does not constitute clinical advice. Titan Implants is not sponsored by, affiliated with, or endorsed by ZimVie Inc.

More selection guides: Engaging vs. Non-Engaging · Abutment Sizing · Implant Locator Pin · One Driver Advantage · 3i Certain Guide · All Resources