Invisalign Eligibility: Suitable for Adults and Teenagers Over 12, Case-by-Case for Children

Invisalign (clear aligner therapy) is indicated for:

• Adults: Full permanent dentition; compliance reliable.
• Teenagers (≥12–13 years): Most permanent teeth erupted; Invisalign Teen includes compliance indicators (blue dots), eruption tabs, replacement aligners.
• Children (Phase I / early interceptive): Mixed dentition; limited to specific indications (arch expansion, anterior crossbite, space maintenance). Requires high parental supervision. Not all cases suitable.

Contraindications / Limitations

• Severe skeletal discrepancies (orthognathic surgery needed).
• Large rotations (>20°), extrusions, intrusions — better with fixed appliances.
• Poor compliance risk (aligners must be worn 20–22 hrs/day).
• Significant periodontal disease uncontrolled.

Orthodontist evaluation (clinical, CBCT, iTero scan) determines candidacy. Treatment duration: 6–18 months typical.