A large part of my week at AQUA is spent reviewing smile makeover cases that went off course at another clinic. The patient sits across from me, sometimes holding photos of what they had hoped for, with a mirror in front of them reflecting something quite different. Veneers that glow under the clinic spotlight and disappear in daylight. A smile that looks beautiful in a still photo and feels strange the moment they start speaking. Gums that healed unevenly because no one studied the lip line before treatment began. I have learned more from these conversations than from any textbook.
I trained at King Abdulaziz University, then spent years in the United States: first an Advanced Education in General Dentistry residency at the State University of New York at Buffalo, and then a cosmetic residency at the University of California, Los Angeles (UCLA). The lesson that took root in me from both programs is that cosmetic dentistry is a discipline of planning, not of drilling. The hand holding the instrument is only as good as the plan that guided it there. When smile makeover cases go wrong, they go wrong early, in the planning stage, long before a single tooth is touched.
In this article I lay out the five most common mistakes, and how I choose to avoid them in my own practice. I am writing this for my patients, not for my colleagues, because the questions you ask before treatment protect you far more than any correction I can make afterward.
Mistake one: choosing a shade that is too white for the face
The first decision in a smile makeover is often not really a decision at all. The patient points to a photo, usually of a celebrity on Instagram, and says, “I want this shade.” The shade is almost always B1 or the bleached BL1, the brightest on the VITA guide. And for most of the faces I see in Jeddah, this is not the right choice.
A tooth does not exist on a shade card. It exists inside a face. Skin tone, eye color, the warmth or coolness of the lips, gum color — all of these interact with the tooth to produce what the eye reads as “natural.” A B1 shade against a warm Mediterranean or Khaleeji complexion can read as chalky and artificial, especially under Saudi outdoor light, which is far harsher than the carefully designed lighting inside a clinic or a photo studio. I choose not to default to the brightest possible shade. Instead, I take the patient out into daylight, look at their teeth in the light they actually live in, and settle on a shade two or three steps brighter than their natural baseline. The result reads as “you, refreshed,” not as “someone else’s teeth.”
The American Academy of Cosmetic Dentistry (AACD) and the American Board of Cosmetic Dentistry (ABCD) both publish smile design standards that emphasize facial harmony over absolute whiteness. The best cosmetic work makes people stop at “you look well,” not at “who did your teeth.”
Mistake two: skipping the diagnostic wax-up or digital mock-up
This is the mistake that causes the most difficult damage to repair, and it is the one I feel most strongly about. Cosmetic preparation of a tooth removes enamel that cannot be put back. If we prepare before we plan, we are committing the patient to a restoration we have not yet designed.
In my workflow, nothing touches a tooth until we have completed a diagnostic wax-up on a model or a digital design on a screen, the patient has seen a simulation of the new smile in their own mouth using a temporary mock-up, and we have photographed that simulation from multiple angles — including video of the patient speaking and smiling naturally. This sounds like a lot, and it is. It is also the single strongest predictor that the case will end up looking like what the patient was imagining.
My mentors at UCLA called this stage the “test drive.” If you would not buy a car without driving it first, you should not have eight teeth prepared before you have worn the new smile for a few days. When a patient comes back from the mock-up with notes like “the edges are too square” or “more tooth shows than I would like when I pronounce certain letters,” that feedback is a gift. I can adjust those details in the wax or in the software. I cannot adjust them once the tooth has been prepared.
Mistake three: over-preparing teeth when minimal-prep or no-prep would do
Modern porcelain has changed what preparation means. A well-designed lithium disilicate veneer can be as thin as 0.3 mm. A feldspathic veneer can be thinner still. In selected cases, we bond no-prep veneers and remove nothing at all from the tooth. And yet I still see cases where 1.0 to 1.5 mm of enamel was removed from teeth that needed only a gentle polish, a color correction, and a carefully designed shell.
The rule I follow is that preparation should be the consequence of the design, not the starting point. If the diagnostic wax-up shows that the final veneer sits where the existing tooth already sits, there is almost no preparation to do. If the wax-up shows that a tooth needs to be reshaped to correct a rotation or a major color change, the preparation is localized and limited. What I choose not to do is prepare every tooth to a uniform depth “just to be safe.” That habit produces symmetric preparations, but it destroys symmetric amounts of enamel.
The reason this matters is long-term. Enamel bonds to porcelain strongly and durably. Dentin bonds less well. The more enamel we preserve today, the longer the veneer lasts, and the easier it will be to refresh or replace it in fifteen or twenty years. The patient does not feel the difference in the first week. They feel it across a lifetime.
Mistake four: ignoring the lip line and gumline asymmetry
When a patient smiles, we see three tissues interacting: the teeth, the lips, and the gums. A smile makeover that focuses on the teeth alone is working on one third of the problem. I have seen beautiful veneers ruined by a gumline no one analyzed, and I have seen ordinary veneers made exceptional by a thoughtful gum contouring done before the porcelain went in.
The lip line, or smile line, is how high the upper lip rises and how much of the teeth and gums it exposes during a full smile. A low lip line hides the gums and gives a forgiving frame. A high or “gummy” smile exposes everything and amplifies any asymmetry. If your gumline is uneven by even one or two millimeters, a high smile will reveal it. I choose to address this before any porcelain is placed, usually through conservative gum contouring, or in some cases a gentle orthodontic movement that allows the gums to settle at the correct height.
This is one of the areas where cosmetic dentistry overlaps with periodontal expertise, and I collaborate closely with the periodontists at AQUA whenever the analysis calls for it. A two-millimeter difference in gum height may not be picked up by the camera, but it is picked up by every patient who looks in the mirror.
Mistake five: designing the smile on the teeth alone, without speech, bite, and soft tissue
The final mistake is the hardest to explain, because it only becomes visible after treatment is complete. A smile is not a static object. It is a tool the patient uses to eat, speak, and laugh. A veneer case designed only for photographs can ignore all of those functions.
In my planning, I look at how much tooth the patient shows when pronouncing certain consonants like F and V, because those tell me how long the upper anterior teeth can be without interfering with speech. I check the envelope of function in the bite — the path the lower teeth follow when the mouth closes — because a veneer that sits even half a millimeter outside that path will either chip or force the patient to subconsciously adjust their bite. I test the incisal guidance, the way the front teeth guide the jaw on protrusion, because this is where most veneer fractures begin years later.
None of this shows up in a before-and-after photo. All of it determines whether the case lasts ten years or twenty.
A gentle invitation
A smile makeover is a relationship, not a procedure. It begins with careful listening to what the patient wants, expands into planning that considers the whole face rather than the teeth alone, and ends with a design the patient has already worn and approved before any instrument touches enamel. When I train younger colleagues at AQUA, I tell them our job is to earn the right to prepare a tooth, through enough planning that the preparation becomes simply the final confirmation of a decision we made carefully beforehand.
If you are considering a smile makeover, you are welcome to book a consultation with me at AQUA. We will take photographs, discuss your goals in plain language, and if the case calls for it, design a digital preview you can see on your own face before we commit to anything. It costs you a quiet hour and gives you the clearest possible picture of what your smile could look like. This is the starting point I wish every patient could have.