What Does an Orthodontist Do? A Complete Guide to Smiles & Jaw Care

What Does an Orthodontist Do? A Complete Guide to Smile Alignment
An orthodontist is a specialized dental professional who diagnoses, prevents, and treats irregularities in the teeth and jaws. While general dentists focus on overall oral hygiene and cavity prevention, orthodontists undergo advanced training to specialize in facial aesthetics, proper bite function, and alignment. Their primary goal is to design healthy, beautiful smiles while ensuring you can chew, speak, and bite comfortably.
The Anatomy of a Smile: What Orthodontists Evaluate
Your mouth is a complex system. Before mapping out a treatment plan, an orthodontist carefully evaluates the entire oral cavity and its supporting structures. This includes your:
Teeth and Gums: Checking for decay, spacing, and gum health.
Jawbones: Evaluating the maxilla (upper jaw) and mandible (lower jaw).
Supporting Tissues: Analyzing the palate, tongue, lips, and alveolar bone.
Muscles and Joints: Ensuring the temporomandibular joint (TMJ) and orofacial muscles function without pain.
Understanding Facial Aesthetics
Orthodontists look at your face through three distinct "aesthetic compartments" to achieve perfect facial harmony:
The Major Compartment: The balance between large features like your eyes, nose, cheeks, chin, and lips.
The Mini Compartment: The visual relationship between your lips, teeth, and smile.
The Micro Compartment: The fine details of your smile, including tooth shape, shade, and visible gum tissue.
During your evaluation, they measure advanced metrics like the smile arc, smile symmetry, upper lip curvature, and the buccal corridor (the dark space visible at the corners of your mouth when you smile) to create a balanced look.
Common Dental Conditions Treated by Orthodontists
Misaligned teeth do more than just impact self-confidence; they can cause premature tooth wear, jaw pain, and make routine cleaning difficult. Orthodontists treat a wide variety of structural issues, including:
Crowded or Spaced Teeth: Teeth that overlap or have wide gaps.
Bite Misalignments: Deep bites, open bites, crossbites, and overjets (forward-tilted teeth).
Jaw Discrepancies: Structural imbalances where the upper and lower jaws do not meet correctly.
Childhood Habits That Affect Jaw Growth
Many alignment issues start early in life. Common childhood habits can permanently alter jaw development and cause malocclusion (poor bite). Orthodontists help identify and intercept habits like:
Thumb sucking and tongue thrusting
Lip biting and mouth breathing
Nail biting
How Orthodontic Diagnosis Works
Your first visit involves a comprehensive digital mapping of your mouth. An orthodontist cannot create a safe treatment plan without specialized diagnostics. Standard diagnostic records include:
High-resolution clinical photographs of your face and teeth.
Digital dental X-rays to see root positioning and jaw bone health.
3D digital scans or traditional study models (casts) of your bite.
The 4 Stages of Orthodontic Treatment
Orthodontic care is tailored to a patient's age and skeletal maturity. Treatment is generally broken down into four distinct phases:

1. Preventive Stage (Ages 0–6)The goal here is to prevent alignment issues before they start. Orthodontists use habit-breaking appliances or specialized tools, such as Nasoalveolar Moulding (NAM) plates for infants born with a cleft lip and palate.
2. Interceptive Stage (Ages 6–12)Also known as Phase 1 treatment, this stage catches developing problems early while a child's jaw is rapidly growing. Common interventions include:Space Maintainers & Serial Extractions: To guide permanent teeth into place.Palatal Expanders: Tools like Rapid Maxillary Expansion (RME) or Slow Maxillary Expansion (SME) to widen a narrow upper jaw.Myofunctional Therapy: Exercises to correct muscle habits.
3. Adolescent Stage (Ages 12–18)This is the most common time for comprehensive orthodontic care because the permanent teeth are in, but the jaws are still adaptable. Treatment usually involves fixed braces or clear aligners to move teeth into their final, ideal positions.
4. Adult Stage (Ages 18 and Older)It is never too late to fix your smile. Because adult jawbones have stopped growing, treatment focuses primarily on moving the teeth using clear aligners or discrete braces. For severe adult jaw discrepancies, orthodontics may be combined with orthognathic (jaw) surgery to achieve a proper bite and improve facial structure.

Conclusion: Investing in Your Oral Health
Orthodontics is far more than just a cosmetic fix. By aligning your teeth and correcting your bite, an orthodontist protects your long-term oral health, eliminates TMJ discomfort, and gives you a functional, confident smile that lasts a lifetime.