At a glance
- An anterior open bite is a form of malocclusion—an abnormal alignment of the teeth—characterised by a vertical gap between the incisal edges of the maxillary (upper) and mandibular (lower) front teeth when the posterior (back)…
- Non-nutritive sucking is a natural infantile reflex that provides comfort and emotional regulation, but its continuation past infancy introduces detrimental orthopaedic forces.
- The clinical features of pacifier-induced malocclusion present in a recognisable pattern.
- Diagnosis of a pacifier teeth open bite begins with a comprehensive clinical examination by a paediatric dentist or orthodontist.
- In paediatric dentistry, anterior open bites are categorised according to their severity, aetiological origin, and dental development stage.
Anatomy and Pathophysiology of Anterior Open Bite
An anterior open bite is a form of malocclusion—an abnormal alignment of the teeth—characterised by a vertical gap between the incisal edges of the maxillary (upper) and mandibular (lower) front teeth when the posterior (back) teeth are in full contact. In a healthy primary dentition (milk teeth), the upper incisors slightly overlap the lower incisors both vertically and horizontally. This anatomical arrangement protects the soft tissues, facilitates the shearing of food during mastication, and provides an essential acoustic boundary for speech articulation.
The supporting alveolar bone (the thickened ridge of bone containing the tooth sockets) in toddlers possesses high cellularity and remarkable plasticity. It responds dynamically to sustained mechanical forces. When an infant or toddler habitually sucks on a dummy or pacifier, the synthetic teat acts as a mechanical barrier between the dental arches. This constant physical intrusion prevents the normal vertical eruption of the anterior incisors while simultaneously permitting the posterior molars to continue their vertical development, creating a distinct curved gap termed a pacifier teeth open bite.
Biomechanics: How Non-Nutritive Sucking Distorts Dental Arches
Non-nutritive sucking is a natural infantile reflex that provides comfort and emotional regulation, but its continuation past infancy introduces detrimental orthopaedic forces. The extent of dental and skeletal distortion depends directly on the triad of duration, frequency, and intensity, with duration playing the most critical role. Clinical orthodontic principles dictate that light, continuous pressure applied for more than six hours per day exerts sufficient force to displace teeth within their periodontal ligaments and remodel the surrounding alveolar bone.
During pacifier use, the dorsum (upper surface) of the tongue is depressed downwards against the floor of the mouth to accommodate the teat, depriving the hard palate of internal tongue support. Concurrently, the contraction of the buccinator muscles (cheek muscles) generates inward lateral pressure against the maxillary posterior segments. This imbalance between deficient internal lingual support and excessive external buccal pressure leads to transverse maxillary constriction (a high, narrow palate) and posterior crossbites, alongside the proclination (forward tipping) of upper incisors.
Identifying the Signs: Clinical Presentation of Pacifier Teeth
The clinical features of pacifier-induced malocclusion present in a recognisable pattern. The most prominent sign is the anterior open bite itself, which frequently mirrors the exact oval or circular contour of the pacifier teat. The upper central and lateral incisors typically exhibit proclination, flaring outward towards the upper lip, while the lower incisors may retrocline (tip backward) or become crowded due to the lingual force applied by the pacifier base. This creates an exaggerated horizontal gap between the upper and lower teeth, known clinically as an increased overjet.
Beyond tooth positioning, soft tissue adaptations become clinically evident. Toddlers often develop lip incompetence, meaning their lips do not meet at rest without active strain from the mentalis muscle (chin muscle). Secondary functional compensations frequently emerge, such as an adaptive tongue thrust, where the child positions their tongue forward into the open gap during swallowing and phonation to achieve an anterior seal. Parents may notice difficulties in biting through solid foods, such as apples or sandwiches, as well as speech distortions including lisping on sibilant sounds like 's' and 'z'.
Professional Diagnosis and Differential Assessment
Diagnosis of a pacifier teeth open bite begins with a comprehensive clinical examination by a paediatric dentist or orthodontist. The clinician conducts an extra-oral evaluation to assess facial symmetry, lip competence, and profile convexity, followed by an intra-oral examination to record the relationship of primary molars and canines in centric occlusion (the bite when chewing surfaces meet). Clinicians carefully differentiate between a purely dental open bite—confined to the alveolar process and incisor positioning—and a skeletal open bite, which involves hyperdivergent facial growth, a steep mandibular plane angle, and vertical maxillary excess.
Diagnostic records may include clinical photography, digital intra-oral optical scanning to generate three-dimensional digital study models, and, when clinically indicated by age and severity, low-dose dental radiography. Radiographs such as lateral cephalometric views are generally reserved for older children approaching the mixed dentition stage to quantify skeletal proportions. The clinician must also perform a differential diagnosis to rule out confounding aetiologies, such as digit-sucking habits, chronic airway obstruction causing mouth breathing, enlarged adenoids, ankyloglossia (tongue-tie), or intrinsic temporomandibular joint disorders.
Classification and Clinical Staging of Open Bite Malocclusions
In paediatric dentistry, anterior open bites are categorised according to their severity, aetiological origin, and dental development stage. Mild open bites involve a vertical separation of one to two millimetres confined strictly to the central incisors. Moderate presentations exhibit a vertical gap between three and five millimetres extending across both central and lateral incisors. Severe open bites exceed five millimetres of vertical opening and may involve the canines and premolars, often reflecting a complex combination of prolonged non-nutritive sucking, persistent tongue thrusting, and underlying skeletal vertical discrepancies.
Staging is also linked to the child's dental eruption phase. Stage 1 (primary dentition, ages two to four) represents the functional, reversible phase where malocclusion is limited to alveolar distortion. Stage 2 (transitional or early mixed dentition, ages five to seven) occurs as permanent incisors begin to erupt; at this stage, unaddressed habits alter the eruptive path of permanent teeth. Stage 3 (late mixed and permanent dentition, ages eight and above) signifies an established, structured malocclusion where skeletal changes become permanent without formal orthodontic or orthopaedic intervention.
Evidence-Based Strategies for Habit Cessation
The primary intervention for pacifier-induced dental changes is timely habit cessation. Professional dental bodies widely recommend phasing out pacifiers before the age of two to three years to enable natural self-correction of the alveolar bone. The first line of management involves positive behavioural modification. Techniques include milestone-based cessation (such as trading the pacifier for a toy), gradual weaning schedules that restrict pacifier use strictly to sleep periods, positive reinforcement charts, and empathetic parental coaching that addresses underlying emotional distress without punitive measures.
When behavioural approaches fail in children aged four to five, interceptive orthodontic appliances may be considered. Passive fixed appliances, such as a palatal crib, tongue guard, or Bluegrass appliance, are cemented temporarily to the primary second molars. These appliances do not apply active forces to the teeth; instead, they physically obstruct pacifier insertion and redirect resting tongue posture, breaking the neuromuscular feedback loop of non-nutritive sucking and preventing anterior tongue thrust during swallowing.
The Clinical Consultation: What to Expect Step by Step
A formal evaluation for pacifier-associated malocclusion is designed to be gentle, supportive, and child-centred. The initial consultation begins with a detailed habit history, capturing the type of pacifier used, daily duration, sucking intensity, and any coexisting habits like thumb sucking or blanket holding. The dentist then performs a knee-to-knee or dental chair examination to visually assess the occlusion, palatal depth, gingival health, and soft tissue attachments, checking for lip ties or tongue restrictions.
If interceptive appliance therapy is indicated, the subsequent appointment involves taking dental impressions or performing a rapid, non-invasive digital intra-oral scan to map the maxillary arch. The custom appliance is fabricated in an orthodontic laboratory and fitted during a separate visit. The clinician checks the fit against the soft palate to ensure it does not cause mucosal irritation or impede normal swallowing, after which parents receive explicit instructions regarding dietary adjustments, oral hygiene maintenance, and speech adaptation expectations.
Post-Cessation Recovery and Spontaneous Remodelling
Following successful habit cessation before age three to four, the human stomatognathic system exhibits remarkable self-correcting potential. Once the mechanical barrier of the pacifier is removed and the tongue is permitted to adopt its natural physiological resting posture against the anterior palate, the primary incisors typically resume their vertical eruption. Alveolar bone remodels under normal masticatory and lip pressures, and mild to moderate dental anterior open bites frequently resolve spontaneously within six to twelve months.
During this recovery window, regular monitoring at three- to six-month intervals is essential to confirm that vertical overlap (overbite) is progressing normally. Parents should expect a short period of mild speech adaptation or dietary adjustment if an appliance is fitted, typically resolving within one to two weeks. If spontaneous closure does not occur despite habit cessation, clinicians assess whether a secondary habit, such as habitual tongue thrust or mouth breathing secondary to nasal passage resistance, is perpetuating the open bite.
Long-Term Complications, Red Flags, and Multidisciplinary Care
If pacifier sucking persists past age four and into the eruption of permanent incisors, the dental open bite can transition into a permanent skeletal deformity. Unresolved anterior open bites increase the risk of traumatic dental injuries, as proclined upper incisors lack lip protection. Chronic open bites are also associated with masticatory inefficiency, improper bolus formation, temporomandibular joint stress, and compensatory speech impediments that may require extensive corrective orthodontics or orthognathic (jaw) surgery in adolescence.
Clinical red flags warranting immediate specialist evaluation include habitual snoring, daytime mouth breathing, chronic nasal congestion, sleep-disordered breathing, audible TMJ clicking, or significant speech articulation delays. In such cases, care extends beyond the paediatric dental clinic. An integrated multidisciplinary approach—collaborating with ear, nose, and throat (ENT) surgeons, paediatricians, speech and language therapists, and orofacial myofunctional therapists—ensures that structural airway issues and muscular imbalances are treated alongside dental alignment.
Evidence and further reading
Clinical guidelines established by international authorities, including the American Academy of Pediatric Dentistry (AAPD), the British Society of Paediatric Dentistry (BSPD), and the American Dental Association (ADA), consistently emphasise that non-nutritive sucking habits should ideally cease before 36 months of age to minimise irreversible dentofacial changes. Systematic reviews in the Journal of the American Dental Association and the American Journal of Orthodontics and Dentofacial Orthopedics demonstrate that while pacifier-induced dental changes can resolve spontaneously if the habit is discontinued early, transverse skeletal discrepancies like posterior crossbites show significantly lower rates of spontaneous self-correction than vertical anterior open bites.
Research published in Cochrane systematic reviews and the European Archives of Paediatric Dentistry confirms that both psychological habit-breaking techniques and orthodontic appliance interventions are clinically effective in stopping prolonged habits, with fixed appliances demonstrating higher immediate success rates in persistent cases. Clinicians and researchers widely agree that early identification, structured parental guidance, and timely clinical intervention prevent the need for complex, invasive orthodontic treatments during later childhood and adolescence.
Questions patients ask us
- At what age does a pacifier start causing permanent damage to teeth?
- Dental distortions such as flaring and open bite can begin in infancy, but these changes in the primary teeth are usually temporary and reversible if the pacifier is stopped by age two to three. If the habit persists beyond age four, when the permanent front teeth begin to form and erupt, the risk of permanent dental and skeletal malocclusion rises significantly.
- Will a pacifier teeth open bite close on its own once the dummy is stopped?
- Yes, in many toddlers who stop before age three, mild to moderate dental open bites close spontaneously within six to twelve months. The alveolar bone remodels and the incisors continue their natural vertical eruption, provided there is no secondary habit like thumb sucking or an adaptive tongue thrust preventing closure.
- Are orthodontic pacifiers truly safer for dental development?
- Orthodontic pacifiers with flattened teats are designed to exert less vertical force on the incisors and reduce pressure on the palate compared to traditional cherry-shaped teats. However, clinical evidence shows that prolonged use of any pacifier, regardless of design, will still cause malocclusion if used frequently and beyond the recommended age.
- How can I break my toddler's pacifier habit without causing emotional distress?
- Gradual, supportive methods work best. Start by limiting the dummy strictly to the cot for sleep, then implement milestone events like giving it to a 'dummy fairy' in exchange for a comfort toy. Use sticker reward charts, offer consistent verbal praise, and provide extra comfort during transitions. Never use punitive measures or scolding.
- What is the difference between a pacifier open bite and a thumb-sucking open bite?
- While both cause anterior open bite, thumb sucking often creates asymmetrical tooth displacement and higher upward palatal pressure because the digit is rigid and unyielding. Pacifier open bites are typically more symmetrical, matching the teat's contour, but pacifiers are often associated with a wider transverse narrowing of the upper jaw.
- Can pacifier teeth cause speech development problems in young children?
- Yes. An anterior open bite allows the tongue to protrude forward between the teeth during speech, which can cause lisping, particularly on sibilant sounds such as 's', 'z', 'sh', and 'ch'. Stopping the habit early and allowing the bite to close usually resolves these articulation challenges naturally.
- What is a palatal crib, and when is it necessary for a child?
- A palatal crib is a small, custom-made, fixed metal appliance cemented to the upper back molars. It features a smooth wire barrier behind the front teeth that physically prevents pacifier insertion and stops forward tongue thrusting. It is generally reserved for children aged four and older when behavioural habit-breaking attempts have failed.
- When should my child see a paediatric dentist about pacifier teeth?
- The British Society of Paediatric Dentistry and American Academy of Pediatric Dentistry recommend a first dental visit by age one, or when the first tooth erupts. If you notice a visible gap between your child's front teeth, flared incisors, or difficulties chewing, book an assessment with a paediatric dentist promptly.
When to see us
Get examined without waiting if any of the following applies to you:
- A broken bracket, poking wire or appliance causing ulceration
- A tooth that becomes painful, loose or discoloured during treatment
- Jaw joint pain, locking or a bite that has changed suddenly
Get a written plan and cost before you commit
If this is what you are dealing with, the next step is a consultation with radiographs — orthodontics cases are seen by the specialist who handles that field. You get a written plan and staged cost before anything begins.
reception@dramitsharmahospital.comThis article is general education and does not replace an in-person examination, radiographs or a diagnosis by a qualified dentist.
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