Crooked teeth rarely appear without a reason behind the pattern. Genetics, habits, and simple accidents all push teeth out of line. The cause matters, since it shapes the treatment plan and the timing.
A correct diagnosis separates a skeletal problem from a purely dental one. Experienced South Surrey orthodontists identify that difference during the first exam. The five causes below account for most cases seen in practice.
1. Inherited Jaw Size and Tooth Size
Tooth size and jaw size arrive through separate genetic instructions entirely. Large teeth inside a small jaw produce crowding with no other cause. A small tooth in a wide arch leaves gaps that never close. Neither situation reflects any failure of ordinary childhood dental care.
Family photographs usually reveal the same pattern across two or three generations. Families notice a parent and a child with matching bites. Expansion or extraction resolves the space problem depending on the numbers. Measurements taken from a digital scan settle that choice precisely.
2. Early Loss of Baby Teeth
A baby molar holds space for the permanent tooth beneath it. Decay or an accident can remove that tooth years ahead of schedule. Neighboring teeth then drift into the opening and steal the space. The lower molars migrate faster than most parents would expect.
The permanent tooth erupts sideways or stays trapped inside the bone. A simple space maintainer prevents that outcome for very little cost. Timing matters here, since the drift begins within a few months. A radiograph confirms that the successor tooth still sits in position.
3. Childhood Oral Habits
Thumb habits apply steady outward pressure to the upper front teeth. An open bite and a flared upper arch follow after several years. Pacifier use past age three produces a very similar result. Most children stop naturally with steady, patient encouragement at home.
Tongue thrust pushes against the front teeth during every single swallow. Clinicians in South Surrey screen for these habits at the earliest visits. Habit appliances and myofunctional therapy correct the pattern before treatment. Braces alone rarely hold a result against a persistent habit.
4. Mouth Breathing and Airway Problems
Chronic nasal blockage forces a child to breathe through the mouth. The tongue drops low and stops supporting the upper arch properly. A narrow palate and a long lower face develop over several years. Dark circles and chapped lips accompany that facial pattern frequently.
Enlarged tonsils and allergies rank among the most common underlying causes. An ear, nose, and throat referral resolves many of these cases. Careful South Surrey orthodontists coordinate with a physician on those cases. Expansion works best while the palatal suture remains open in childhood.
5. Injury, Gum Disease, and Adult Drift
A blow to the mouth can move a tooth or kill the nerve. Bone remodels around the injury, and the alignment slowly shifts over time. Sports guards prevent a large share of those injuries in young athletes. A custom guard protects far better than a boil-and-bite version.
Gum disease destroys the bone that anchors the teeth in adult patients. Front teeth then flare outward and develop gaps that widen yearly. Adults in South Surrey need the gum condition stabilized before any movement.
Misalignment traces back to genetics, lost baby teeth, habits, airway, or injury. The correct treatment depends entirely on which cause drives the case. Children benefit from early screening, since growth remains available as a tool. Adults still have options, though the mechanics work differently after growth. A consultation in South Surrey identifies the cause within a single visit.