Implant-Abutment Connection: Understanding Your Options

The connection between the implant and the prosthetic abutment determines the stability, sealing and longevity of the prosthesis. Before choosing a system, it helps to understand the main options and what they mean both at the chair and in the laboratory.

What is the implant-abutment connection?

The connection is the junction zone between the implant, anchored in the bone, and the abutment, which supports the crown or bridge. It transmits masticatory forces and determines how the prosthesis is positioned and retained.

The internal hex

The internal hex is a six-sided connection inside the implant. The abutment engages in it and is locked against rotation, which ensures good stability and precise orientation of the prosthesis.

This geometry is widely used. It is simple to work with and easy to follow in standard protocols, which makes it a common choice for single units as well as bridges.

The conical connection

The conical connection relies on the fit of two inclined surfaces, without a hex. The abutment is retained by friction, with a junction often presented as more sealed.

It requires particular attention to torque and to the cleanliness of the surfaces, since stability depends on the contact between the two parts. It is also associated with good distribution of forces across the connection.

Screw-retained or cemented abutment

Beyond the connection, you must choose how the abutment is attached to the prosthesis:

• The screw-retained abutment can be removed easily, which simplifies maintenance and repair of the prosthesis. The access hole must be sealed properly.
• The cemented abutment is fixed with cement. It can make aesthetics simpler to achieve in some situations, but retrieval is more difficult if the prosthesis needs to be removed.

The choice depends on the implant position, the aesthetics required and how easily the restoration can be accessed for future maintenance.

Platform switching

Platform switching means using an abutment with a smaller diameter than the implant. This offset moves the junction away from the crestal bone, and it is often cited as a way to limit bone resorption around the implant. Its benefit depends on the clinical case and on the design of the system.

The components of the connection

The connection is not limited to the abutment. It comes with components suited to each stage of treatment:

• Healing screws, which protect the connection during osseointegration.
• Transfers, which record the position of the implant on the working model.
• Analogues, which replicate the implant in the laboratory.
• Multi-units and attachments, useful for implant-supported prostheses and overdentures.

Make sure these components come from the same system, or that they are explicitly compatible with it.

Compatibility: what to check

A connection is not only a geometry: it must be compatible with the components you use. Check:

• the compatibility between the implant and the abutment, specifying the system concerned;
• the diameter and height of the connection;
• the laboratory components, such as analogues and transfers.

At TOV Implant, the internal hex implants (MAER and RAGIL ranges) and the conical connection implants (TCX range) are presented with their respective compatibilities. The table below summarises the ranges and the systems they are compatible with. Please check the documentation for each range before combining components.

In summary

• The internal hex offers rotational stability and standardised implementation.
• The conical connection relies on fit and requires strict attention to torque.
• The screw-retained abutment simplifies retrieval, while the cemented abutment meets certain aesthetic constraints.
• Component compatibility is a key factor in prosthetic success.

Torn between two connections? Our team helps you choose the connection best suited to your cases and your laboratory.