Design Parameters - Clinical Considerations

Nexus Design Parameters are designed to ensure the best outcome for final titanium bar retained prosthetics.

The design parameters are guidelines - due to the organic nature of each patient-matched prosthesis, some of the specifications may be adjusted on a case-by-case basis.

Key Clinical Factors

• Interocclusal Space
• Inter-Implant Distance
• Implant Divergence
• Maximum Cantilever
• Multi-Unit Selection

Interocclusal Minimums

Interocclusal space is measured from the highest point on restoring tissue to the opposing occlusal plane.

PROSTHETIC	OPPOSING	INTEROCCLUSAL MIN.
Single Arch	Existing Natural Dentition Tissue-Borne Denture	6-7mm Per Arch
Dual Arch	Zirconia Acrylic	7-8mm Per Arch
Bruxer Patient, Single Arch	Existing Natural Dentition	8-9mm Per Arch
Bruxer Patient, Dual Arch	Zirconia Acrylic	8-9mm Per Arch

Inter-Implant Distance

Inter-implant distance is measured from the edge of the placed multi-unit abutment.

• Maximum inter-implant distance: 25mm
• Minimum inter-implant distance: 2mm

Maximum Implant Divergence (Path of Insertion)

The maximum angle of divergence between any two multi-unit abutments in an arch cannot exceed 45°

Severe angulation may be corrected with angled-MUA selection. If uncorrected, bars will not seat due to path of insertion.

Cantilever

Nexus titanium bar retained fixed final prosthetics can accommodate a maximum cantilever of 15mm.

Prosthetics with larger cantilevers will fall out of standard design parameters and may void warranty.

Multi-Unit Abutment Selection (Recommendations)

Implant placement and subsequent multi-unit abutment selection should aim to maximize restorative space.

SUBGINGIVAL

The best outcome to maximize restorative height is 1mm or more below the tissue. Prosthetic bar will include a chimney to meet the Multi-Unit into the tissue. Not ideal for non-bar retained prosthetics.

EQUIGINGIVAL

The best outcome to maximize restorative height is 1mm or more below the tissue. Prosthetic bar will include a chimney to meet the Multi-Unit into the tissue. Not ideal for non-bar retained prosthetics.

SUPRAGINGIVAL

MUA’s proud of the gingiva will reduce the restorative space and require the prosthesis to be raised significantly off the tissue, or require a concave design.

Last Updated 15th April 2025