Evaluation and Management of Anterior Open Bite in Children
Children with anterior open bite should undergo initial assessment to identify the underlying etiology (dental vs. skeletal) and contributing factors (particularly non-nutritive sucking habits), followed by age-appropriate intervention ranging from habit cessation and observation in younger children to orthodontic treatment with functional appliances or temporary anchorage devices in older children.
Initial Evaluation
Identify Etiology and Contributing Factors
- Assess for non-nutritive sucking habits (thumb/digit sucking, pacifier use) as these are the most common reversible causes of anterior open bite in young children 1, 2
- Determine if the open bite is dental or skeletal in origin through clinical examination and, when indicated, cephalometric analysis 2, 3
- Dental open bites: typically amenable to orthodontic treatment and may resolve spontaneously with growth
- Skeletal open bites: frequently worsen with growth and may require combined orthodontic-surgical approaches in severe cases
- Evaluate additional contributing factors including enlarged lymphatic tissue with mouth breathing, unfavourable growth patterns, and soft tissue effects 4, 5
Age-Specific Considerations
- In children under 5 years with trauma affecting oral structures, consider child abuse as a possible etiology 6
- For children in primary or mixed dentition, simple open bites may resolve completely during transition to permanent dentition if causative habits are eliminated 5, 7
Management Algorithm
Step 1: Habit Correction (Primary Intervention for Young Children)
- Implement habit cessation strategies as the first-line approach for open bites associated with non-nutritive sucking 1, 8
- Utilize oral myofunctional therapy (OMT) and habit-correcting appliances to enhance treatment outcomes and long-term stability 8
- Monitor for spontaneous resolution in children transitioning from mixed to permanent dentition after habit elimination 5
Step 2: Orthodontic/Orthopedic Treatment (When Habit Correction Insufficient)
For Children in Primary/Mixed Dentition:
- Frankel's functional regulator-4 (FR-4) with lip-seal training demonstrated ability to correct anterior open bite (RR = 0.02,95% CI 0.00-0.38), though evidence quality is very low 4, 7
- Removable palatal crib associated with high-pull chincup showed effectiveness in correcting anterior open bite (RR = 0.23,95% CI 0.11-0.48) 4
- Magnetic bite blocks showed beneficial effects on overbite, overjet, and skeletal measurements compared to standard bite blocks 7
For Older Children/Adolescents:
- Temporary anchorage devices (TADs) for molar intrusion offer a minimally invasive alternative to surgery, achieving mean intrusion of 1.70 mm (95% CI: 0.53-2.87 mm) 9, 10
- TADs should be installed on both buccal and palatal sides to deliver equivalent intrusion force 10
- This technique prompts counterclockwise mandibular rotation, correcting open bite while decreasing anterior facial height 10
- Consider overcorrection to ensure lasting stability and maintenance of incisal overlap post-treatment 10
Step 3: Surgical Intervention (Reserved for Severe Cases)
- Orthognathic surgery combined with orthodontics should be reserved for severe skeletal vertical overgrowth or significant horizontal discrepancies that cannot be managed nonsurgically 3, 8
- Recognize surgical risks including pain, swelling, altered nerve sensation, and potential permanent anesthesia 5
Critical Monitoring Points
Periodontal Health
- Closely monitor periodontal changes during active treatment, particularly with TAD-based molar intrusion 10
Relapse Prevention
- Anticipate high relapse potential as anterior open bite has a high incidence of post-treatment relapse 2
- Ensure complete habit elimination before and during treatment to maximize stability 1, 8
- Implement comprehensive retention protocols following active treatment 8
Common Pitfalls to Avoid
- Do not assume all open bites require immediate intervention - dental open bites in young children with active habits may resolve spontaneously once habits cease 5, 7
- Avoid treating skeletal open bites with orthodontics alone when significant vertical skeletal discrepancies exist, as these typically require surgical intervention for stable correction 2, 3
- Do not overlook underlying airway issues - enlarged lymphatic tissue and mouth breathing patterns must be addressed concurrently 4
- Recognize that repelling-magnet splints have documented side effects and treatment may need to be interrupted 4