FINAL PROSTHETIC
DESIGN PARAMETERS
Nexus bar-retained final prosthetics are designed to maintain strength and durability over the life of the prosthesis.
To achieve this, cases must meet minimum standards and design requirements. These parameters are the result of tens of thousands of Nexus cases. Please note that the figures presented here are guides only, some cases may require greater VD or various other changes based on the patients unique setup.
-
Interocclusal Minimums
How much space is needed between the tissue and opposing teeth?
-
Inter-Implant Distance
How large can gaps between implant sites be?
-
Implant Divergence
The limits of implant angulation and MUA correction.
-
Maximum Cantilever
How far can unsupported prosthetic sections extend?
-
Multi-Unit Selection
What is the best choice of Multi-Unit Abutment depth?
Interocclusal Minimums
Interocclusal space is measured from the highest point on restoring tissue to the opposing occlusal plane.
| PROSTHETIC | OPPOSING | INTEROCCLUSAL (MM) |
|---|---|---|
Single Arch |
• Existing Natural Dentition | 6-7mm Per Arch |
| • Tissue-Borne Denture | ||
Dual Arch |
•Zirconia | 7-8mm Per Arch |
| • Acrylic | ||
| Bruxer Patient Single Arch |
• Existing Natural Dentition | 8-9mm Per Arch |
| Bruxer Patient Dual Arch |
• Zirconia | 8-9mm Per Arch |
| • Acrylic |
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 (Fixed Prosthesis)
Nexus 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)
SUBGINGIVAL
The best outcome to maximise restorative height is 1mm or more below the tissue.
Prosthetic bar will include a chimney to meet the Multi-Unit into the tissue.
Implant placement and subsequent multi-unit abutment selection should aim to maximise restorative space.
EQUIGINGIVAL
Necessary to ensure hygienic prosthetic design and convex bar shape on the intaglio surface.
SUBGINGIVAL
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
