Why does a Hollywood smile look fake? The most common causes
Think of the smiles around you that you would describe as “obviously done”; most likely they share the same few features. The teeth are distinctly whiter than the whites of the eyes, all the same length and shape, the incisal edges are as straight as a ruler and the surface reflects light like a matt wall. None of these is an unavoidable consequence of the material; each one is a design choice.
Textbooks state that natural enamel is translucent, opalescent and fluorescent, and that a ceramic meant to imitate a tooth must carry the same properties. An opaque core or heavy surface stain blocks light and the tooth looks “dead” and flat. The second major source of an artificial look is the assumption, still applied despite clear evidence from perception studies, that “the whiter and straighter, the more beautiful”.
The third source is a lack of planning. Ceramics made without correcting the gum level, assessing the bite and photographing the teeth together with the face look foreign in the face even when each tooth is beautiful on its own. Our Hollywood smile guide explains why planning comes before ceramic; below we look at the six keys to a natural result one by one.
Key 1: a material that transmits light, with internal layering
The sense of depth in a natural tooth comes from light passing through the enamel and reflecting off the dentine. Dental materials textbooks report that enamel-type porcelains transmit roughly 45–50 percent of light and dentine-type porcelains 18–38 percent; a natural appearance is achieved by using these two layers together. A restoration made from a single opaque mass gives no depth even if its colour is right.
This is where material choice matters. Classic zirconia cores are very strong but relatively opaque; glass ceramics (lithium disilicate, feldspathic porcelain) transmit light better. If an opaque core is chosen for a patient whose neighbouring teeth are translucent, the new teeth will look “different” however well they are made. This balance between strength and translucency is discussed in detail in zirconia or veneers.
The second point is the colouring method. Characterisation painted onto the surface increases reflection and reduces translucency, so textbooks recommend placing character features inside the ceramic, layer by layer. In a drawing called a shade map, the tooth is divided into cervical, middle and incisal zones, and the colour, translucency and small features of each zone are sent to the laboratory separately.
Key 2: not the whitest shade, but the one that suits your face
Shade is the component of an artificial look that is noticed fastest. The very light shades added to the guide for bleached teeth are not a grade of quality but simply codes; even the lightest natural shades look bright enough on most faces. Teeth whiter than the whites of the eyes draw immediate attention, particularly on mature faces and darker skin tones.
The second property of a natural colour is that it is not a single colour. A real tooth is more saturated at the neck, balanced in the middle and more translucent at the incisal edge. Producing the whole tooth, and all the teeth, in one flat tone leaves an artificial impression whatever the code. Colour-measurement studies show that the human eye perceives very small colour differences but finds them acceptable up to a certain threshold; this tells us the goal is harmony, not an identical match.
The meaning of the shade codes, the conditions for selection and the timing of whitening are covered in detail on our BL1, BL2 and A1 shade guide. For this article the summary is enough: have the shade chosen from your face and the neighbouring tissues, not from the shade guide alone.
Key 3: natural proportions, not the golden ratio
The “golden ratio” that appears so often in smile-design marketing is rarely found in natural teeth. In a web-based preference study only 8 percent of the public preferred smiles designed to the golden ratio over average natural proportions. In average natural proportions the lateral incisor is about 66 percent of the width of the central incisor and the canine about 84 percent of the lateral; the eye is used to this balance.
The proportion of a single tooth matters too. Dentists found the central incisor most attractive when its width-to-length ratio was about 75–78 percent; periodontal sources give a range of 0.78–0.85. For example, a central incisor 8.5 mm wide would be expected to be about 10–11 mm long. Short, wide, square-looking teeth leave a “done” impression on most faces.
The number of teeth is part of proportion as well. The design should cover as many teeth as are visible in the smile; making six teeth light and leaving the ones behind untouched creates a step at the corners of the smile. This decision is explained in detail on our page on how many veneers you need.
Key 4: a curved edge line and small spaces between the teeth
In a natural smile the upper incisal edges form a gentle arc that follows the curve of the lower lip; this line, called the “smile arc” in the literature, is strikingly similar in the smiles judged most attractive. Edges that form a straight line break this arc and make the smile look older or mechanical.
The second detail is the small V-shaped spaces between the tips of neighbouring teeth (embrasures). These spaces are more pronounced in young teeth and close with wear over time. In the preference study, dead-straight, even edges were preferred by fewer than 30 percent of participants. The textbook recommends that restorations arrive from the laboratory with small embrasures and that these are then opened at the chair to the patient’s taste; in other words, naturalness is adjusted together with the patient.
The third detail is the translucency of the incisal edge. A natural incisal edge has a slight bluish-grey translucency; if this zone is made opaque the tooth looks like plastic. The slight pointedness of the canines at the corners should also be kept; six teeth all the same width with the same flat edge are perceived as a single block.
Key 5: an even gum line and margins that do not bulk out the tooth
The gums are the frame of the smile, and if the frame is crooked the picture does not draw the eye however good it is. Periodontal sources regard it as natural for the gum margins of the central incisors and canines to sit at the same level, with the lateral incisor about 1 mm lower; in people with a high lip line, equal levels may also be preferred. The real cause of short-looking teeth is often incomplete gum recession during eruption, which is solved not with ceramic but with gum contouring.
The second issue is the position and thickness of the margin. When a tooth is not prepared enough, the technician is forced to make the ceramic thick; these “over-contoured” restorations bulge at the gum margin, collect plaque and make the tooth look artificial. Sources state that over-contouring is clearly associated with gum inflammation. In ultra-thin bonded veneers the margin can be left invisible at gum level; going below the gum, on the other hand, damages the attachment zone called the biologic width and leads to redness and recession.
The third issue is black triangles between the teeth. When the contact point between teeth is close to the crest of the bone, the gum papilla fills the space; when it is far away, a dark triangle remains. Deciding the position of the contact point at the planning stage makes these spaces predictable.
Key 6: surface texture and deliberately kept small differences
A natural tooth surface is not smooth glass; fine vertical lines, gentle undulations and small differences in gloss scatter the light. Reproducing this texture in ceramic keeps the teeth looking “alive” even from a distance. Six teeth polished to a mirror finish, each equally smooth, may look very good on camera but artificial in a face-to-face conversation.
The second component is symmetry. Natural smiles are not perfectly symmetrical, and perception studies tolerate this: a deviation of the dental midline from the facial midline of about 2.2 ± 1.5 mm has been reported as the average acceptance threshold, and when dentists were compared with lay people, the lay people noticed small asymmetries far less. The textbook states that right-left balance matters more than exact symmetry and that a slight outward tilt of the incisors is preferred to an inward one.
This is why a good design deliberately keeps some differences: one lateral incisor a touch shorter than the other, a small undulation in the incisal edge, a slight difference in saturation at the neck. These are not mistakes; they are the signatures the eye recognises as natural. What matters is that these differences are discussed with the patient and approved on the mock-up.
Comparison: the signs of an artificial and a natural design
The table below compares the six keys at a glance. You can use it as a checklist when looking at your photographs or at a treatment plan.
| Feature | Sign of an artificial look | Sign of a natural look |
|---|---|---|
| Material and light | Opaque, matt surface without depth | Translucent enamel layer, internal layering |
| Shade | Whiter than the eye whites, one flat tone | Lightness that suits the face; gradient from neck to middle to edge |
| Proportion | Short, wide, square teeth; golden ratio forced | Width/length ratio about 0.78–0.85; average natural proportions |
| Edge line | Ruler-straight, no embrasures | Arc following the lower lip, small V-shaped spaces |
| Gums and margins | Uneven gum line, bulging margins, redness | Even frame, thin invisible margin, healthy gums |
| Texture and symmetry | Mirror finish, identical copies | Surface texture, deliberate small differences, right-left balance |
Nothing in the “natural” column requires an extra material or technology; all of it is about planning and communication with the laboratory. What determines the result is therefore not which brand is used but how the design is constructed.
Seeing the natural result with a mock-up before the teeth are touched
The most reliable insurance for a natural look is to see the design first in temporary material on your own face. Textbooks define the diagnostic wax-up and its in-mouth version, the mock-up, as a standard step in complex aesthetic cases. In general the process works like this:
- Photographs of the face and smile and a digital scan are taken; lip movement and the smile arc are recorded.
- The planned tooth shapes are built on a model in wax or digitally; proportions, the edge line and the embrasures are set here.
- Through a clear template taken from the design, temporary resin is applied over the unprepared teeth.
- The result is viewed on your face while talking, smiling and under different lighting; edge length, curve and shape are corrected together with you.
- The approved design is sent to the laboratory as the reference; the ceramic is made to these dimensions.
- Before bonding, colour and light transmission are checked one last time with try-in pastes.
Changing a request for “a little whiter, a little straighter” takes minutes at the mock-up stage; the same change in bonded ceramic means remaking it. Saying openly at this stage whatever worries you about naturalness ensures that the result is truly yours. For details of digital planning, see our digital smile design process page.
Pre-assessment for a natural result in Bahçelievler
A natural look is not a style; it is the sum of a series of clinical decisions: a material that transmits light, a shade that suits the face, average proportions, a curved edge, healthy and even gums, texture and deliberate asymmetry. Each of these decisions is made at the examination, together with your face; it cannot be made from a photograph or a catalogue.
At our clinic in Bahçelievler, the pre-assessment begins with a general examination that includes gum health and the bite; where necessary, gum contouring or short orthodontic alignment is planned before the ceramic. Bringing your expectations, the “fake” examples you want to avoid and the smiles you like to the consultation makes the design easier.
For a first opinion you can send smile photographs taken in daylight to +90 544 289 66 33 on WhatsApp or call to book an appointment. A photograph gives only an initial idea; the examination decides which path suits you.
Frequently asked questions
Will nobody be able to tell I have had a Hollywood smile?
Those close to you will of course notice that your teeth have changed; the question is whether the new teeth look made. Perception studies show that lay people notice small differences far less than dentists do. When the material transmits light, the shade suits the face and natural proportions are kept, the result is usually perceived simply as healthy, well cared-for teeth; over-white and dead-straight designs, by contrast, catch the eye immediately.
Can a natural look not be achieved with zirconia?
It can, but the type of material matters. Classic zirconia cores are relatively opaque and can look different next to very translucent neighbouring teeth. Layered or more translucent zirconia types and glass ceramics transmit light better. The right choice depends on the tooth: on dark or heavily filled teeth an opaque core offers a masking advantage, while on sound, light-coloured teeth a glass-ceramic veneer gives the more natural result.
Should all the teeth be made identical for a natural look?
No; on the contrary, identical copy teeth are the most typical sign of an artificial look. In a natural smile the central incisors are the widest, the lateral incisors are smaller and often one differs slightly from the other, and the canines are more saturated in colour and slightly pointed. A good design deliberately preserves these differences, maintains right-left balance and approves the design with you on the mock-up.
If I want whiter teeth, will they look fake?
Up to a certain lightness, no. The lightest shades on the natural guide look bright and clean on most faces. The very light shades added for bleached teeth attract attention when they compete with the whites of the eyes and when the tooth is made in a single flat colour. What matters is not the code itself but keeping the colour gradient between the neck, middle and incisal zones and adding edge translucency. Deciding with your dentist, on your face and in daylight, is the soundest approach.
Can old veneers that look fake be made natural?
In most cases, yes. The colour and shape of bonded ceramic cannot be changed afterwards, but the veneers can be remade with more translucent material, natural proportions and a curved edge line. Before remaking, the extent of existing tooth preparation, gum health and the bite are assessed. If the cause of the artificial look is an uneven gum level, gum contouring may be needed first.
Does a natural look reduce durability?
Not when planned correctly. A curved edge, embrasures and surface texture concern the shape of the ceramic, not its thickness. What determines durability is the design of the bite, bonding onto enamel and managing any clenching or grinding habit. Long-term studies show that the most common problems with veneers are fracture and debonding and that the risk rises in people who grind; a night guard is recommended for them.
Will the result I see in the mock-up be the same as the real thing?
In terms of shape, length and edge line, largely yes; the mock-up goes to the laboratory as the reference for these decisions. Colour and light transmission, however, are not fully visible in temporary resin, because ceramic transmits light differently. For this reason colour and translucency are checked separately with try-in pastes before bonding. It is important to mention everything you dislike about the mock-up at that stage.
My gums look too prominent. Will veneers fix that?
Usually not on their own. A common cause of short-looking teeth is gum that sits too far down over the tooth; in that case the problem lies in the frame, not the tooth. Periodontal sources address this with gum and, if needed, bone recontouring, and the ceramic is planned after healing. Veneers made without correcting the gum line look short and wide and reinforce the artificial impression.
Related guides
Contact: Yayla Dental Akademi, Ferit Selimpaşa Cad. No:44A, Bahçelievler, Istanbul (Basın Sitesi, opposite Migros; about 600 m from İlkyuva metro station, line M3). Monday–Saturday 10:00–21:00, Sunday closed. WhatsApp and phone: +90 544 289 66 33 · Online booking: DoktorTakvimi.
Sources
- Rosenstiel, S. F., & Rashid, R. G. (2002). Public preferences for anterior tooth variations: A web-based study. Journal of Esthetic and Restorative Dentistry, 14(2), 97–106. PubMed ↗
- Kokich, V. O., Jr., Kiyak, H. A., & Shapiro, P. A. (1999). Comparing the perception of dentists and lay people to altered dental esthetics. Journal of Esthetic Dentistry, 11(6), 311–324. PubMed ↗
- Sarver, D. M. (2001). The importance of incisor positioning in the esthetic smile: The smile arc. American Journal of Orthodontics and Dentofacial Orthopedics, 120(2), 98–111. PubMed ↗
- Paravina, R. D., Ghinea, R., Herrera, L. J., Bona, A. D., Igiel, C., Linninger, M., Sakai, M., Takahashi, H., Tashkandi, E., & Perez, M. del M. (2015). Color difference thresholds in dentistry. Journal of Esthetic and Restorative Dentistry, 27(Suppl. 1), S1–S9. PubMed ↗
- Tarnow, D. P., Magner, A. W., & Fletcher, P. (1992). The effect of the distance from the contact point to the crest of bone on the presence or absence of the interproximal dental papilla. Journal of Periodontology, 63(12), 995–996. PubMed ↗
- Beier, U. S., Kapferer, I., Burtscher, D., & Dumfahrt, H. (2012). Clinical performance of porcelain laminate veneers for up to 20 years. The International Journal of Prosthodontics, 25(1), 79–85. PubMed ↗
- Rosenstiel, S. F., Land, M. F., & Fujimoto, J. (2006). Contemporary fixed prosthodontics (4th ed.). Mosby Elsevier. WorldCat ↗
- Sakaguchi, R. L., & Powers, J. M. (Eds.). (2012). Craig’s restorative dental materials (13th ed.). Elsevier Mosby. WorldCat ↗
- Newman, M. G., Takei, H. H., Klokkevold, P. R., & Carranza, F. A. (Eds.). (2019). Newman and Carranza’s clinical periodontology (13th ed.). Elsevier. WorldCat ↗
Search the databases: PubMed · Google Scholar · NIH PMC · Cochrane (institutional access may be required).
This page is for information only; diagnosis and treatment plans are determined by a dentist after an examination. Figures are population averages from the cited sources and do not describe an individual outcome.
