Many people blame Zinc Oxide Eugenol, alcohol, sodium hypochlorite, or poor
cleaning. The truth is that all of these may contribute, but no single one
explains the problem on its own.

The tray may be clean, yet still look dirty because
the plastic surface itself has aged.

What Actually Happens?

A new delivery tray has a smooth factory finish that protects the plastic.
Over time, repeated cleaning, disinfectants, metal instruments, heat, and
dental materials gradually damage that protective layer.

Surface Wear

Repeated wiping and chemical exposure slowly reduce the original gloss.

Microscopic Scratches

Metal instruments and aggressive scrubbing create tiny defects in the surface.

Trapped Pigments

Blood, cement, eugenol, composite, and articulating paper pigments settle into these defects.

Eventually, the staining is no longer sitting on top of the tray.
It becomes embedded within the damaged surface itself, making ordinary
cleaning or scrubbing unable to restore the original appearance.
Studies have shown that repeated exposure to disinfectants, together
with surface aging, can alter surface roughness and color stability of
polymer-based materials. As surface roughness increases, pigments are
more easily retained, making discoloration progressively more difficult
to remove.^[1]

Before and After

Before
Discolored and worn delivery tray
The chair may still function perfectly, but the worn tray makes the
entire dental unit appear old and poorly maintained.

After
Restored with a new delivery tray
The same dental unit, transformed with a new delivery tray. A simple
replacement can dramatically improve the appearance of the entire
chair without replacing the dental unit itself.

Can Repainting Help?

Yes. Some clinics repaint the top surface using metallic or automotive
paint. The result can look impressive at first and may offer a quick,
lower-cost cosmetic improvement.

However, repainting has limitations.
Most metallic paints are not as resistant as the original factory finish.
With repeated disinfection and daily instrument use, they may scratch,
lose their shine, chip at the edges, or become stained again.

Repainting is therefore best viewed as a
temporary cosmetic restoration, not a permanent solution.

Protect the New Finish

Whether the tray is repainted or replaced, adding a
silicone tray mat is one of the easiest ways to extend its
lifespan.

Reduces direct contact with metal instruments.
Minimizes scratches and surface abrasion.
Protects against dental material spills.
Makes routine cleaning easier.

When Is Replacement Better?

Replacement is usually the better long-term option when the tray has
permanent discoloration, deep scratches, cracks, peeling paint, or a rough
surface that is increasingly difficult to clean.

In the past, finding suitable replacement trays could be difficult. Apex
Dental Shop has simplified the process by making commonly needed delivery
unit components more accessible.

Final Thought

Sometimes a dental unit does not need replacing. It simply needs a new
tray, silicone mat, or handle. Replacing these visible components can
transform the unit at a fraction of the cost of buying a new chair.

Complete Restoration

A Professional Look Without Replacing the Entire Dental Unit

Sometimes, all it takes is replacing a few visible components a new
delivery tray, silicone mat, and tray handle to restore the appearance
of your dental unit at a fraction of the cost of buying a new chair.

Does Your Dental Unit Look Older Than It Really Is?

Explore replacement delivery trays, silicone mats, and instrument tray
handles from Apex Dental Shop.

Shop Delivery Tray


Shop Silicone Mat


Shop Tray Handle

Apex Dental Shop — Dental equipment, spare parts, restoration, maintenance,
and repair solutions for dental clinics.