Under this layer of veneers, the natural tooth is still alive and mostly complete, although it’s generally been reformed, ground away, removing a thin layer of enamel to give the shell somewhere to sit. That tooth can still be attacked by tooth rot, the gum can still shrink back away from it, and the nerve inside can still be harmed in its turn. This guide will help you understand the importance of what is underneath more than many realize, who are mostly concerned with what they see. Including pointing out to remember that glass-schlag is a veneer and not a substitute or a permanent seal for the tooth.
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The bond of veneers is potentially excellent, but there is a margin, and the margin is a true border, and that border is where most of the problems will develop eventually. The ability to understand what occurs sub-porcelain or sub-composite is the distinction between a 15-year veneer and a silent failure!
How Much of the Natural Tooth Is Removed?
No-prep or micro-prep veneers have been developed, more exactly to prevent reduction, by not taking any or very little material away albeit they only apply to a limited range of cases (and are not capable of correcting the breadth of problems achievable with normal veneers). Enamel cannot be replaced. After the removal the tooth always needs covering because the underlying surface is not as hard or dense and it is more sensitive than the enamel that protected it.
This size of reduction would be used to create space for finished veneers to avoid it being bulky; and to provide a scarred surface for the adhesive to grip. How much is cut away depends on the circumstances. An already small or retracted tooth may be reduced very little, while a protrusive or heavily contoured one may need to lose much more material.
Can a Tooth Still Decay Under a Veneer?
Yes, and this is the most common serious problem encountered with veneers. Veneers are placed over the front of the tooth, but the decay usually begins at the margins, or edges of the shell, in particular around the gum line where plaque tends to build up.
If bacteria find their way under that margin, then they will encounter unprotected tooth structure and cause decay to develop out of sight. What makes this sneaky is that the porcelain itself doesn’t wear, so an unconscious glimpse of the mirror reveals a perfect tooth while a problem here is silently brewing below the surface.
Expert opinion indicates that both margin failure and secondary caries are among the commonest causes of veneers replacement, often long before the lifespan of the porcelain has expired. The shell may be pristine, while the supporting tooth is silently crumbling away. So, this is why everyday care for veneers doesn’t become optional. Brushing twice a day and in between the teeth keeps the margins clean, and the living tooth that the veneer is relying on, is kept protected.
What Happens to the Nerve and the Gums Over Time?
The nerve inside the tooth (again it is in the pulp) still lives and can still respond to the treatment. If enamel is lost so that the preparation is close to the pulp, then the patient can become sensitive to hot or cold for several weeks or sometimes longer after placement of the filling. In a small percentage of cases the pulp is irritated enough that the tooth over time ultimately needs root canal treatment, at some future date, which is something that it is probably better to be aware of before treatment than afterwards.
An unsightly story can also develop in the gums. The margin looks deep beneath a veneer if a patient has always had receding gums, and also as a normal part of aging. Recession can reveal the junction where veneer joins tooth, or have a darker border at the edge, which all ages far worse than a margin set at or below the gumline if done well.
Different materials behave differently underneath. Porcelain is biocompatible and tends to sit well against gum tissue, whereas poorly finished composite can collect plaque more readily at the margin. For people exploring less invasive or more affordable options, composite veneers involve less enamel removal in many cases, which preserves more of the natural tooth even though they typically need replacing sooner than porcelain. The trade-off between preserving tooth structure and longevity is a real one, and it plays out entirely in the part of the tooth nobody can see.
What Happens When a Veneer Comes Off or Needs Replacing?
When a veneer becomes debonded or chipped the underlying tooth is exposed. What you find will vary depending upon the preparation and long-term margin care. A well-maintained tooth could be merely fresh bonding to replace a cherished veneer. A neglected one may show signs of caries, sensitivity or long-term marginal leakage turning a straightforward replacement into a larger restoration.
Very few replacements are just a straightforward exchange. To successfully replace an existing veneer, the accumulated tooth removal must be required, and it is inevitable that each phase of the replacement process over the lifetime will take a little more. This is the long road that no one considers initially: a veneer placed at thirty needs replacing in your seventies, and so there have been two or three replacements, each removing a small amount more of the natural tooth. With time, some of the teeth that have delayed veneers will eventually need crowns as the structure is lost.
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