Crooked Teeth Before and After: What Correction Changes (and What It Doesn’t)

Crooked is a single word covering several different situations, and they are not interchangeable. Clinicians group them under malocclusion, which simply means the teeth do not meet in the way a textbook arch would. Knowing which pattern you actually have is what makes a consultation productive, because the patterns respond differently and carry different functional consequences.

Crowding and rotation

This is the pattern most people mean. There is less arch length than there is tooth width, so teeth overlap, tuck behind one another, or twist in place. A single rotated upper front tooth catches light differently from its neighbours, which is why one rotated tooth can dominate a smile far more than its size suggests. Crowding also creates contact points that a toothbrush cannot easily reach, which is where the cosmetic question starts to overlap with a hygiene question.

Spacing

The opposite problem: more arch than tooth. The gap between the two upper central incisors has its own name, a diastema, and it is common enough that plenty of people never treat it. Spacing tends to read as intentional in a way crowding does not, which is part of why the decision here is more clearly cosmetic.

Bite relationships

Overjet is how far the upper front teeth sit forward of the lower ones horizontally. Overbite is how much they overlap vertically. An open bite means the front teeth do not meet at all when the back teeth are closed. A crossbite means one or more upper teeth sit inside the lower ones. These are relationships between the arches rather than the position of one tooth, and they are the ones most likely to have a functional dimension.

Midline

The dental midline is the line where the two upper central incisors meet. When it does not line up with the middle of the face, a smile can look off-centre even when every individual tooth is straight. This is one of the details that gets corrected quietly in a before-and-after and is rarely mentioned in the caption.

Everything alignment changes happens inside the frame of your lips. That is a smaller region than people expect, and it is also the region a viewer looks at first when you speak, so a small area can carry a lot of weight.

The most visible thing that moves is the incisal line — the run of the biting edges of the upper front teeth. When teeth are crowded or rotated, that line is broken and steps up and down. Straightening it produces a continuous curve, and a continuous curve is what most people are unconsciously reacting to when they say a smile looks tidy. The relationship of that curve to the lower lip is what dentists call the smile arc.

Second, the dark spaces at the corners of the smile — the buccal corridors — often narrow when a crowded arch is expanded, because more of the back teeth come into view. Third, the midline can be brought closer to centre. Fourth, the amount of tooth visible both at rest and in a full smile can shift, because moving teeth changes how the lip drapes over them.

What alignment does not do is change the teeth themselves. Colour, tooth shape, chipped edges, worn edges, gum contour and gum display are separate categories with separate treatments. This matters when reading before-and-afters, because whitening and edge bonding are frequently done in the same course of treatment and the caption almost never says so. If the after photo has noticeably whiter teeth, at least part of what you are looking at is not alignment.

This is the claim that circulates hardest online and deserves a flat answer. Moving teeth through bone does not move the bone that gives your face its outline. Your jawline angle is a property of the mandible and the soft tissue lying over it. Your facial thirds — the proportions between hairline, brow, nose base and chin — are set by the vertical dimensions of the skull. Your midface ratio, chin projection, cheekbone position, canthal tilt and nose proportion are all upstream of the teeth. A tooth rotating a few degrees does not touch any of them.

There is one honest partial exception, and it is smaller than it sounds. The upper front teeth support the upper lip, so meaningfully retracting or advancing them can slightly change how the lip sits and therefore the lip proportions in a photo. That is a soft-tissue drape effect measured in millimetres, not a change to bone. Anyone showing you a dramatic jawline transformation attributed to aligners is showing you something else — weight change, camera angle, posture, lighting, or age.

Surgical repositioning of the jaws is a genuinely different category. That does move skeletal structures and can change the outline of a face. It is also a medical procedure assessed by a maxillofacial specialist against function and health criteria, not something to reason yourself into from a photo gallery. If someone has raised it with you, the right move is a specialist consultation, not a comparison thread.

If you want to see where your own proportions currently sit before you attribute anything to your teeth, the 17-metric facial scan gives you the structural numbers — jawline angle, facial thirds balance, midface ratio, canthal tilt and the rest — and the face rating page explains how the percentile behind them is derived. Having those numbers in front of you makes it much easier to tell which part of what you dislike is dental and which part was never dental at all.

Where our measurements stop

Being specific about this matters more than being flattering about it. RealSmile detects 68 facial landmarks and derives 17 geometry metrics from them, plus a Face Score percentile validated against an academic human-rating benchmark. At /analyze it additionally reads smile genuineness — whether the smile recruits the orbicularis oculi around the eyes, the Duchenne marker.

Not one of those 68 landmarks sits on a tooth. They sit on the jaw outline, the brows, the eyes, the nose and the borders of the lips. The tool therefore cannot assess tooth alignment, bite, crowding, cavities, gum health or anything else clinical, and it should never be used as a substitute for an examination. It measures the geometry of a face in a photograph. A dentist measures your mouth. Those are different jobs and it is worth not confusing them.

These two get blurred in marketing, and separating them is the single most useful thing you can do before spending money. A cosmetic reason is about how the smile looks to you. It is a legitimate reason, it is yours to weigh, and nobody else can rank it for you. A functional reason is about how the teeth work, and that is assessable by someone else.

The functional side is what a dentist actually examines. Among the things they look at: wear facets, meaning flattened or polished areas where teeth grind against each other in a pattern the arch was not built for. Cleaning access, because overlapped surfaces trap plaque in places floss struggles to reach, and that is a gum-health question rather than an appearance one. Trauma risk on prominent upper incisors, which sit further forward and take the impact in a fall or a sports collision. Chewing efficiency where the back teeth do not meet properly. Gum recession around teeth sitting outside the bone housing. And jaw joint symptoms — clicking, restricted opening, or pain on chewing — which have several possible causes and require a proper assessment rather than an internet diagnosis.

None of that constitutes advice to have treatment, and this page is deliberately not going to give you any. The useful framing is a question you can take with you: which of my concerns are functional, which are cosmetic, and what happens if I do nothing? A clinician who answers that clearly, including the doing-nothing option, is giving you something to work with. One who cannot separate the two is worth a second opinion.

Photo pairs are the primary evidence people use to make this decision, and most pairs are not evidence of anything. The failure is rarely dishonesty; it is that two photographs of the same mouth taken under different conditions can look enormously different for reasons that have nothing to do with treatment.

Start with the obvious mismatch: a retracted clinical shot with cheek retractors and a natural smiling portrait are not comparable images. Retractors pull the lips out of the way and expose the full arch under direct flash, which flatters nothing. Then work through the rest. Focal length and camera distance change apparent width — a close phone shot distorts the centre of the face outward. Head tilt and rotation change which teeth are foreshortened. Smile intensity changes tooth display entirely; a polite closed smile and a full unguarded one show different mouths. Lighting direction changes which surfaces catch highlights, and a rotated tooth is visible precisely because it catches light off-axis. And whitening, done alongside alignment in a great many cases, changes the perceived result on its own.

We can put a number on how much a photograph alone moves a facial measurement, because we measured it on our own users rather than asserting it. Across 103 people who scanned the same face twice within 14 days — too short an interval for real physical change — the score differed by a median of 4 points on a 0-100 scale, 40% moved 5 points or more, and 12% moved 10 or more. The full method and the caveats are published on our research base. That variance is the photograph talking, not the face. Assume the same effect is operating in any before-and-after pair you are shown.

Taking a before photo that will still be useful in a year

If you want a comparison you can trust later, control the variables now. Use the same room and the same time of day so the light matches. Stand the same distance from the camera and keep the lens at the same height as your mouth. Keep your head level rather than tilted. Take three shots: lips at rest, a social smile, and a full smile. Do not whiten anything in the intervening period if you want to isolate what alignment did. Write the date on the file. A pair taken this way tells you something. A pair taken casually tells you about the lighting.

Teeth are not set in bone like fence posts. They sit in sockets, suspended by a periodontal ligament, surrounded by gum fibres that were stretched into new positions during treatment. Orthodontic practice has long recognised a tendency for teeth to drift back toward where they came from once active appliances are removed, which is why retention is treated as part of the treatment rather than an afterthought. The after photo in a gallery is usually taken at the end of active treatment. It is not a photo of where the teeth will be in five years unless retention has been maintained.

Retainers come in broad types. A fixed retainer is a thin wire bonded behind the front teeth; it works without you remembering anything, but it needs monitoring because bonds can fail quietly and it makes flossing that section more involved. A removable retainer is a clear or plated appliance worn on a schedule; it is easier to clean around but depends entirely on you wearing it. Which is appropriate depends on the case, and that is a clinical judgement rather than a preference.

The questions worth asking are practical ones. What type of retainer is planned, and why that one for my case? What is the expected wear schedule, and does it reduce over time or stay constant? Who checks the retainer, how often, and is that included in the quoted fee or billed separately? What does a replacement cost if I lose it or it breaks? If teeth do shift, what does correcting that involve and who pays for it? Get those answers before treatment starts rather than at the end, because at the end you have lost your negotiating position.

A consultation goes better when you arrive with questions rather than a treatment already picked out. These are framed as questions on purpose — this page does not know your mouth and is not in a position to recommend anything.

• What is the diagnosis in clinical terms, and which parts of it are functional versus cosmetic?
• What are all the options here, including doing nothing, and what are the trade-offs of each?
• Does the plan involve removing any teeth, or reducing enamel between teeth to create space?
• Who is supervising the case day to day — a general dentist or a specialist orthodontist — and how often will I be seen in person?
• What is the retention plan, what does it cost over time, and who monitors it?
• What happens if the result relapses or I am unhappy with it? What is covered and for how long?
• Can I see cases similar to mine where the before and after were photographed the same way?
• Is any whitening, bonding or veneer work included in the examples I am being shown?

If a plan cannot survive those questions, that tells you something useful before any money moves. A second opinion for anything irreversible is normal and no reasonable clinician takes offence at it.

There is a dimension of a smile that has nothing to do with the teeth and is often what people are actually reacting to. A smile that reads as genuine recruits the orbicularis oculi, the muscle ring around the eye, producing the crinkling at the outer corners. This is the Duchenne marker, and it is difficult to produce deliberately. A smile using only the mouth muscles reads differently even when the teeth in it are perfect.

This is relevant to crooked teeth for a specific reason. People who are self-conscious about their teeth often learn to suppress the smile — keeping the lips closed, cutting it short, turning away from cameras. That habit is visible, and it is separate from the alignment that caused it. Some of the difference in a striking before-and-after is a person smiling fully for the first time in years, which is a real change but not a change in tooth position.

Our smile analysis reads this dimension specifically: whether the smile in a photograph reaches the eyes. It says nothing about your teeth and is not meant to. But if you are trying to work out what to change about how you photograph, it is worth knowing whether the issue is the smile you are producing or the teeth inside it, because those have very different answers. If you are working through appearance changes more broadly, the same logic applies to skin — our skincare routine guide takes the same line about separating what actually responds to effort from what does not.

Split it into three questions and answer them in order. First, is there a health or function issue? That one is answered by a clinician, and if the answer is yes it changes the weighting of everything else. Second, is there something cosmetic that genuinely bothers you when you are not thinking about it — as opposed to something you noticed after an hour of scrolling comparison photos? Third, are your expectations about what will change accurate, meaning the smile itself rather than the shape of your face?

Costs and timelines vary widely by case, by country and by the type of treatment, so any specific figure quoted online is close to meaningless for your situation. Get a real quote against a real diagnosis. And go in knowing what alignment does: it makes the biting edges of your teeth line up, closes the gaps or opens the crowding, brings the midline closer to centre, and changes how much tooth shows when you smile. That is a meaningful change to the part of your face people look at when you talk. It is not a change to your bone structure, and a plan sold on that second promise is not describing what teeth do.