Case Study
Fabrication of 3D Printed Inlay and Onlay
Designing for superb outcomes
Advanced CAD software: Utilising advanced CAD software (e.g., Medit CliniCAD or exocad), we are able to design a virtual model of the inlay or onlay with outstanding precision and accuracy. This digital environment allows for precise manipulation to achieve a perfect fit within the prepared cavity. Additionally, adjustments to the gap or thickness of the restoration can be made to optimise clinical outcomes. This customisation ensures exceptional strength, aesthetics, and optimal bite function.
Efficient nesting: Software such as Ackuretta Alpha AI and SprintRay RayWare Cloud can arrange inlays or onlays from multiple patients within the 3D printing chamber. Concurrent printing made possible by “nesting” maximises material usage, minimises waste, and optimises printing efficiency. Strategic angling of the restorations during nesting can further improve the effectiveness of the layering process, optimising print quality.
Printing with high-performance materials
Post-processing for a flawless finish
Support removal: During printing, some models may require temporary support structures. These supports are meticulously removed with flush cutters or tweezers to avoid damaging the delicate inlay or onlay. Precise removal techniques ensure a pristine surface for finishing.
Polishing: Following support removal, the restorations are meticulously polished to achieve a smooth, natural-looking surface that reflects light similarly to surrounding teeth.
Cleaning: For ceramic-filled resin, we perform an initial wash in isopropyl alcohol (IPA) in a shaker for 30 seconds, followed by alcohol spraying and cleaning of surfaces and grooves with a micro brush. Then, we use compressed air drying to ensure no moisture remains on the surface. IPA left on the surface after washing can cause whitish streaks or a chalky film as it evaporates, particularly if the resin absorbs some of the IPA, altering its surface characteristics.
Post-curing in glycerine: A thin layer of glycerin is applied to prevent moisture absorption before final curing. Moisture can negatively impact the inlay or onlay’s strength and longevity. Glycerin eliminates oxygen effectively, allowing the resin to fully cure and reach its optimal strength.
Final curing: The restoration is then placed inside a UV curing unit for final hardening, ensuring the inlay or onlay achieves its maximum strength and durability.
Staining & glazing: For exceptional aesthetics, pigments, stains, and textures can be meticulously applied to perfectly match the colour, shade, and surface characteristics of the patient’s natural teeth. Throughout this phase, UV light is used to ensure proper bonding and curing of the applied glaze and coats.
Conservative and efficient restorative approach
