Clinical Guidelines for Hiossen EK Implant System

2.3 Working Model Components (Substitutes)

Type, Model, and Purpose

Transfer Lab Analog EKTA350 (Ø 3.5)/EKTA400 (Ø 4.0-7.0) to cast gypsum models and replicate implant positions

Rigid Lab Analog, as listed in the catalog, is used for bridge repair models and is more stable

Digital Lab Analog is used in conjunction with intraoral scanners in the scanning volume section for 3D printing models

Attention: Alternative parts with a diameter of Ø 3.5 are specialized and Ø 4.0 and above are universal and cannot be mixed.

2.4 Classification of repair base stations

The repair base of EK system can be divided into:

a. Rigid Abutment

Straight, adjustable angle (0 °, 15 °, 25 °, etc.)

Prefabricated with hexagonal anti rotation structure, directly used for screw fixing single crown

Material: Titanium or Gold Alloy

b. Goldcast Abutment/NP Cast Abutment

Used for making metal casting post cores, with personalized adjustment of gingival contour

NP Cast is a plastic castable cap that is easy to embed and cast

c. Pre milled Abutment/Freeform ST Abutment

Pre milling base can perform CAD/CAM personalized carving

Freeform ST is a pure titanium plastic abutment that can directly stack ceramic materials

d. Angled Abutment

Provide angles of 15 °, 25 °, 35 °, etc. to correct the axial deviation of the implant

There are two interfaces: Hex and Non Hex

e. Multi Abutment&Multi Angled Abutment

Used for joint repair of multiple implants (pole clamps, bridge frames)

Multi angle adjustment for easy joint positioning on the track

f. Student Abutment and Locator ®  Legacy Abutment

Used for covering dentures, ball caps or locator attachments to provide ideal retention force

Locator is a universal interface that can replace nylon gaskets of different colors (light, medium, heavy)

g. Temporary Abutment

Plastic or titanium material, used for making temporary crowns

Digital Prosthetics Process

The EK system supports fully digital workflows, including:

3.1 Scan Body

Model applicable characteristics

Universal scanning body (Hex/Non Hex) requires all EK implants to be matched with 1.2 hex screws to provide clear scanning geometry

EK Cerec Scan Post Deep implantation or thick gingiva for Cerec system, with less vertical exposure of the scanning abutment

Operation points:

The scanning body needs to be manually tightened (torque wrenches cannot be used to avoid deformation).

Remove the healing abutment before scanning and clean the internal connections of the implant.

After scanning is completed, the scanning body and screws can be removed and disinfected for reuse.

3.2 Digital Lab Analog

Match the 3D printed model with the scanned volume data.

The material is PEEK or metal, and can be screwed into the model base.

3.3 Pre milled Abutment

The gingival contour and restoration shape can be designed in CAD software and cut using a five axis machine tool.

Save workshop production time and achieve high edge sealing.

Common clinical problems and solutions

4.1 Mismatch between implant abutment connection (abutment cannot be fully seated)

Possible causes and solutions

If there is residual adhesive or blood inside the implant, use a specialized brush or probe to clean the inner hexagon and threads

If the healing abutment or covering screw is not completely removed, check for debris and confirm with X-ray

The base station model is incorrect (such as using Ø 4.0 substitute for Ø 3.5 implant). Check the implant diameter, and the EK system substitute is divided into two categories: 3.5 and 4.0+

4.2 Loose or broken screws

Reason: Insufficient torque, excessive bite, and contaminated connection surface.

Prevention: Use a 1.2 hex torque wrench (recommended 30 Ncm). It is recommended to recheck and tighten the screws every six months.

Solution: If the screw is broken, a specialized removal tool (ET Remover Screws, see catalog page 049) can be used.

4.3 Inaccurate impressions lead to model errors

Problem Countermeasures

Ensure that the transfer rod is not fully secured and tightened with a 1.2 hand wrench, and that the guide nut (if any) is locked in place

Window type impression material dislocation uses rigid impression material, and the guide screw is long enough

The closed window transfer body rotates in the mold. If Non Hex type is used, it can be connected and fixed in the mouth before applying mold glue

4.4 Digital scanning body recognition failure

Reason: Reflectance on the surface of the scanned object, excessive gum coverage, and lack of updated scanner software.

Countermeasure: Use anti spray powder or coated scanning spray; Ensure that the scanned object is fully exposed; Update the scanner database to the latest EK system library file.

4.5 Insufficient locator for the attachment of covered dentures

Selection: The Locator Legacy base has nylon pads in different colors (white - light, pink - medium, blue - heavy, gray - overweight). You can switch tests one by one.

Replacement: Use a special tool to remove the old gasket and press in the new gasket. The gasket has a lifespan of about 6-12 months and needs to be replaced regularly.

Replace old implant systems with EK systems

For cases where other brands (such as Straumann, Nobel Biocare, Osstem TS, etc.) have been implanted but the repair parts have been discontinued or the abutment needs to be replaced, it is generally not possible to directly use the EK abutment due to different internal connections. But there are two situations that can be considered for replacement: