Biocompatible Provisional Restorations in A1 & A2 Shades

When a patient leaves the chair after a crown preparation, they are not going home with a bare, shaved-down tooth. They are going home with a temporary crown that will live in their mouth for days, weeks, or sometimes months while the permanent restoration is being fabricated. That temporary needs to do two things: protect the prepared tooth and look like a natural tooth. If it fails mechanically — it cracks, fractures, or falls off — the patient is in pain and back in the chair unexpectedly. If it fails aesthetically — it looks obviously fake, the shade does not match — the patient is self-conscious every time they smile or speak.

This temporary crown and bridge resin is formulated to handle both requirements from a single bottle. It prints with the precision needed for accurate marginal fit — the most critical mechanical factor in provisional restorations — and cures to a shade that closely matches natural dentition in A1 and A2, the two most commonly prescribed tooth shades in the Vita Classical scale.

⚠️ Critical Clinical Information Before Patient Use

⚠️ This material is placed inside the patient's mouth for weeks to months. Before delivering any 3D-printed temporary restoration to a patient, confirm that this material's biocompatibility meets the applicable regulatory requirements in your jurisdiction (ISO 10993, FDA clearance, CE Class IIa, or equivalent). Temporary restorations involve extended intraoral contact — regulatory compliance is non-negotiable. Request the current Safety Data Sheet (SDS) and biocompatibility certificate from your supplier.
For short-term provisional use only. This resin is indicated for temporary restorations during the interim phase of treatment — not for permanent definitive restorations. Verify the manufacturer's maximum recommended intraoral wear time before delivering to the patient.
Post-curing is mandatory for biocompatibility and strength. The mechanical properties and biocompatibility of this resin are only fully activated after proper UV post-curing. An under-cured temporary will fracture prematurely under chewing forces and retains unpolymerized monomers that irritate gingival tissue. Follow the manufacturer's post-cure protocol without shortcuts.
Use dedicated IPA for biocompatible resins. Never wash temporary or provisional resins using the same IPA bath used for non-biocompatible resins (model resins, splint resins). Cross-contamination with residues from other resins can compromise the biocompatibility of the final restoration.
UV wavelength: Compatible with DLP and monochrome LCD printers in the 385–405 nm range. Confirm your printer's light source before ordering.
PPE required during fabrication: Wear nitrile gloves and safety glasses when handling uncured resin. Work in a ventilated area.
Shade selection: Available in A1 and A2. Select the shade that most closely matches the patient's adjacent natural teeth using a Vita shade guide before ordering. Confirm shade match on a printed test piece before cementing.

What Is a Temporary Crown and Why Does the Resin Matter?

When a dentist prepares a tooth for a crown, they need to grind it down to create space for the crown to sit over it. That prepared tooth — shorter, rougher, without enamel — cannot be left exposed. It is sensitive to temperature, vulnerable to bacteria, and structurally weaker than before. The temporary crown is the placeholder: it covers and protects the tooth from the day of preparation until the permanent crown arrives from the lab and gets cemented in.

Think of it like a bandage over a wound — except this bandage needs to look like a real tooth, withstand chewing forces three times a day, and stay in place without loosening. For weeks. Sometimes for months.

That is why the resin matters. A temporary crown printed with the wrong material will crack during a meal, stain within a week, or fit so poorly that bacteria get under it and damage the prepared tooth further. This resin is formulated specifically for the mechanical and aesthetic demands of the provisional phase — strong enough to survive, natural enough to go unnoticed.

Key Material Properties

High flexural strength — resists fracture under chewing forces: The single most important mechanical property of a temporary crown. Every bite places bending stress on the restoration. A resin with high flexural strength resists that stress without cracking or fracturing during the provisional period.
Excellent marginal fit — the key to a successful temporary: A poorly fitting margin allows bacteria and oral fluids under the crown, causing sensitivity, decay on the prepared tooth, and gingival inflammation. This resin prints with the dimensional accuracy needed for tight marginal adaptation — meaning the crown edge seals against the tooth as designed, not as approximated.
A1 and A2 shade accuracy — matches the most common natural tooth colors: A1 and A2 are the two most frequently prescribed shades in the Vita Classical system — covering the majority of patients with light to medium natural tooth color. A well-matched temporary is invisible in conversation and allows the patient to maintain normal social confidence throughout the treatment.
Polishable to a natural gloss: After printing and post-processing, the surface can be polished to a smooth, glossy finish that mimics natural enamel. A matte or rough surface on a temporary accumulates plaque, stains quickly, and feels foreign to the tongue — all problems that drive patient complaints during the provisional period.
Biocompatible formulation for intraoral safety: Formulated for short-term contact with oral tissue — gingiva, periodontal ligament, pulp through dentinal tubules. Full post-curing per protocol is required to achieve these properties.
Easy chairside adjustability: The cured material can be trimmed, adjusted, and polished chairside using standard dental burs and polishing systems — allowing the clinician to fine-tune occlusion and margins at delivery without special equipment.
Low shrinkage formulation: Minimal dimensional change between the digital design and the cured restoration — critical for marginal accuracy and predictable fit at delivery.

What Are A1 and A2 Shades?

Dentists use a standardized color system called the Vita Classical scale to describe tooth color. Think of it like a paint color chart, but for teeth. The "A" group represents reddish-brown tones — the most common family of natural tooth colors. The number indicates brightness: A1 is lighter, A2 is slightly darker and more saturated. Together, A1 and A2 cover the majority of patients with typical Western tooth coloration.

Choosing the right shade before printing is important. A temporary in the wrong shade is immediately noticeable to the patient — especially in anterior (front) cases. Always verify the patient's shade with a physical Vita shade guide under natural light before selecting A1 or A2.

Clinical Applications

Single-unit temporary crowns (anterior and posterior)
Multi-unit temporary bridges (up to standard bridge span — verify with manufacturer)
Temporary inlays and onlays
Provisional veneers
Interim restorations during implant osseointegration
Trial smile temporaries for aesthetic case approval before final ceramic work
Long-term provisionals during complex restorative planning phases

Technical Specifications

Property	Value
Compatible Technologies	DLP, Monochrome LCD (MSLA)
UV Wavelength Range	385–405 nm
Net Weight / Volume	500 g / 500 ml
Available Shades	A1 (light) · A2 (medium) — Vita Classical scale
Indication	Temporary / provisional restorations — short-term intraoral use
Intraoral Use	Yes — verify biocompatibility documentation before patient delivery
Dimensional Stability	High — low shrinkage for accurate marginal fit
Post-Cure Required	Yes — mandatory for strength and biocompatibility
Wash Method	IPA 95% — dedicated bath for biocompatible resins only
Processing Temperature	20–30°C (68–86°F)
Storage Temperature	Below 25°C (77°F), away from light and heat

Recommended Print Settings

Temporary C&B resins require precise exposure calibration — over-exposure causes dimensional blooming that affects marginal fit, while under-exposure produces weak restorations that fracture during the first days of use. Always verify marginal fit on a die or model before cementing. Run a test crown first.

Setting	Recommended Range
UV Wavelength	385–405 nm
Layer Height	0.05 mm – 0.10 mm — finer layers improve marginal accuracy
Normal Layer Exposure	3–5 s — start conservative; verify marginal fit before increasing
Bottom Layer Exposure	20–40 s
Number of Bottom Layers	3–5
Lift Speed	Moderate — standard for rigid dental resins
Crown Orientation	Angled 45° — minimizes support marks on the occlusal surface and margins
Support Strategy	Light supports on non-marginal surfaces only — never place supports at the margin
Anti-Aliasing	Enabled — critical for sharp marginal geometry and smooth interproximal contours

Post-Processing & Clinical Delivery Protocol

Remove from build plate carefully using a spatula. Support the restoration from the occlusal surface during removal — thin margins can fracture under uneven pressure while in the green state.
Remove supports immediately using fine flush cutters. Mark support locations before removing from the build plate if needed for reference.
Wash in dedicated IPA 95% — two sequential baths of 3–5 minutes each. Use IPA reserved exclusively for biocompatible resins. Brush gently inside the intaglio surface to remove residual resin from the margin area. Do not over-wash — prolonged IPA exposure affects surface quality and can affect marginal dimensions.
Air dry completely using pressurized air before post-curing. Pay special attention to drying inside the crown intaglio surface.
Post-cure under UV — full cure for strength and biocompatibility. Use a rotating turntable curing station. Follow the manufacturer's validated time. Insufficient post-curing is the primary cause of premature fracture in 3D-printed temporaries.
Trim and adjust margins using fine carbide or diamond burs. Check marginal seal on the die before proceeding to occlusal adjustment.
Adjust occlusion on the articulator and chairside with articulating paper. Eliminate high contacts carefully — thin areas near the margin are most vulnerable to fracture during adjustment.
Polish to final gloss using rubber wheels (coarse → fine) and a polishing paste. A smooth, glossy surface reduces plaque retention and staining during the provisional period.
Cement with a temporary cement appropriate for 3D-printed provisionals. Confirm cement compatibility before use — some temporary cements are not indicated for resin-based provisionals. Verify shade match before final seating.

Who Is This Resin For?

This temporary crown and bridge resin is the right choice if:

You are a dentist or dental lab technician producing provisional single-unit crowns or multi-unit bridges for patients in the interim phase of restorative treatment — and you want to move that production to in-house 3D printing for same-day or next-day delivery.
Your patients predominantly fall in the A1 or A2 shade range — the most common tooth colors for light to medium natural dentition. These two shades cover the majority of anterior and posterior provisional cases in everyday practice.
You need a provisional material that delivers reliable marginal fit, adequate fracture resistance, and natural-looking aesthetics without requiring complex post-processing or specialized equipment beyond a standard UV curing station and IPA wash setup.
You own a 385–405 nm DLP or monochrome LCD printer and want to expand your in-house production beyond models and surgical guides into direct patient-delivered restorations.

This resin is NOT the right choice if you need a material for permanent definitive restorations, or if your patient requires a shade outside the A1/A2 range. For surgical guide applications, see our Dental Surgical Resin collection. For dental model printing, see our Dental Model Resin collection.