Table of Contents
SLM lingual arch
The SLM lingual arch is a custom-made orthodontic component designed for use within the lower dental arch. The construction is produced using selective laser melting technology, which enables highly accurate reproduction of the digital design and precise adaptation of the arch configuration to the patient’s anatomical conditions.
At KarDent, SLM lingual arches are designed using working models or intraoral scans submitted by the clinician. Each construction is prepared individually, in accordance with the prescribed treatment objectives and the technical requirements of the specific case.
Digital design of the lingual arch
The manufacturing process begins with an assessment of the digital documentation or working model. At this stage, the arch configuration, its relationship to the lingual tooth surfaces, the extent of the construction and the method of anchorage are defined.
Digital design enables precise control of:
- the arch configuration in relation to the teeth,
- the thickness and geometry of the component,
- the support and anchorage points,
- the distance between the construction and the soft tissues,
- the areas intended for connection to the remaining appliance components.
This makes it possible to create a construction adapted to the individual case without relying exclusively on prefabricated solutions.
SLM technology – precision and repeatability
SLM technology enables the manufacture of a metal component with a consistent structure and highly accurate reproduction of the digital design. Compared with conventional manual wire bending, the digital workflow provides greater control over the shape, configuration and stability of the construction.
This technology is particularly useful in cases where the following factors are important:
- accurate adaptation,
- stable positioning of the arch,
- repeatable manufacturing,
- integration with other custom-made metal components,
- a digital workflow based on intraoral scans.
Following production, the component is processed, finished and prepared for the next stage of assembly in accordance with the appliance design.
Construction and available design options
The SLM lingual arch may be manufactured as an individual orthodontic component or as part of a more complex appliance. Depending on the clinician’s prescription, different construction variants and methods of connection to the anchorage components may be incorporated.
The construction may vary in terms of:
- the extent of the arch,
- its configuration in the anterior and lateral regions,
- the method of anchorage,
- connection to bands or other supporting components,
- the incorporation of additional retentive or reinforcing elements.
The detailed design is determined in each case by the documentation and instructions submitted by the treating clinician.
Function of the construction
Depending on the appliance design and treatment plan, the lingual arch may serve a space-maintaining, stabilising or auxiliary function. Its clinical application, extent and method of use are determined by the treating clinician.
The laboratory’s role is to reproduce the prescribed construction accurately, while maintaining the required geometry, stability and quality of manufacture. At KarDent, we do not alter the configuration, anchorage method or intended function of the appliance without prior consultation.
Manufacture based on models or scans
SLM lingual arches are manufactured using working models, impressions or intraoral scans. Within the digital workflow, we prepare the CAD design and subsequently manufacture the component using SLM technology.
The prescription should include:
- an intraoral scan or working model,
- information regarding the intended extent of the construction,
- the required method of anchorage,
- additional instructions concerning the arch configuration,
- details of any associated components.
Complete and accurate documentation supports precise fabrication and reduces the need for subsequent laboratory adjustments.
