True benefits of early orthodontic treatment

True benefits of early orthodontic treatment

Children’s Dental WorldDr. Milos Lekic

Why treat early

Malocclusions may be diagnosed early Up until 10 years ago there hasn’t been

evidence to point clinicians towards early or late treatment

Our desire to help patients with concerns and self-esteem considerations

Commercial influence as manufacturing has been ahead of science

‘Practice Efficiency’

Early treatments with proven benefits

Posterior and anterior crossbites Crossbites associated with mandibular

shifts may lead to a true skeletal discrepancy as the mandible develops asymmetrically in the direction in which it is shifting

Possible treatments: Removable expansion – slow expansion Fixed expansion – slow/fast expansion (Quad-Helix, W-arch) Fixed expansion – rapid expansion (RPE)

Early treatments with proven benefits

Ankylosed teeth Orthodontic treatment is usually warranted as the

contralateral successor tooth is erupting The successor permanent tooth may need guided

eruption Ankylosed teeth may be used for anchorage purposes It was shown that prolonged retention of ankylosed

teeth may lead to a decreased development of the associated alveolar bone

Early treatments with proven benefits

Excessive protrusions and diastemasThese may lead to injury or avulsionsThey are often reasons why kids get teasedThus, they affect the child’s self-esteemAs the condition persists, the mandibular lip

may become entrapped behind the maxillary incisors, further perpetuating the problem

A 2x4 appliance may be used to correct the protrusion or to close the diastema space

Maxillary fixed appliance may be combined with a headgear However, the three randomized randomized control trial studies

showed that there may be no true benefit with an early two-phase treatment involving headgears or functional appliances

Early treatments with proven benefits

Severe anterior or lateral open bites These conditions need to be addressed early If there is a habit associated with the condition, the

habit itself must be dealt with The most common cause is a prolonged thumb

sucking habit If the habit is treated before the permanent anterior

dentition erupts, the open bite may resolve spontaneously

If open bites are of true skeletal nature, they will require comprehensive treatment later on

Early treatments with proven benefits

Ectopic molarsThese are best treated when they are

discoveredThey are most commonly found as the

maxillary first molars erupt If left untreated, ectopic molar eruption may

lead to early primary molar loss as well as arch length loss

Early treatments with proven benefits

Severe arch length discrepancies>10mm space requiredShallow to normal overbiteFuller lips/profileClass I malocclusion

Serial extraction, if successful, would still necessitate comprehensive orthodontic treatment

Early treatments with proven benefits

Pseudo Class III patientsClass III patients which have a discrepancy

between centric relation and maximum intercuspation may have a pseudo Class III

This condition should be treated before it develops into a true Class III malocclusion

Early treatments with proven benefits

True Class III malocclusions due to a maxillary retrusionThis condition is best treated early between

the ages of 8-10This is a time when the maxilla is undergoing

active growth which can be modified to the patient’s advantage

Early treatments with proven benefits

Space maintenanceThere were two major studies performed with

the aim of assessing treatment of crowding in the mixed dentition

Both studies evaluated the mandibular dentition as it generally dictates the strategy for future maxillary arch treatment

Early treatments with proven benefits

Space maintenance In the mixed dentition, crowding was expected

in 85% of patientsHowever, when the leeway space was

accounted for and preserved with a lower lingual holding arch, 68% of patients exhibited no crowding in the permanent dentition and 87% exhibited crowding of less than 2mm in the permanent dentition

Thus, a large proportion of young patients may be well managed simply by preserving the mandibular arch space

There is a philosophy of treatment which dictates that early maxillary expansion treatment will remove the constraining influences on the mandibular arch and allow it to develop laterally

However, studies have shown that with such treatment, the mandibular intercanine width changes by less than 1mm

Early treatments with proven benefits

Space maintenance Treatment time for lingual arch space maintenance

can be in the late mixed dentition One major exception is the early loss of a primary

canine in which case the opposite canine should be removed and a lingual holding arch inserted

The treatment with only a simple lingual holding arch has been found to be stable in 76% of cases 9 years into retention

Early treatments with proven benefits

Space regaining If moderate space regaining is needed in the

mandibular arch, up to 1mm, it may be accomplished with a lip bumper

It was shown that if more than 1mm of arch length needs to be gained, the final outcome will be unstable

In addition, lateral expansion as a way of gaining space will be unstable as it was shown that mandibular intercanine width tends to relapse to its pre-treatment values

References

White L. Early Orthodontic Intervention. American Journal of Orthodontics and Dentofacial Orthopedics 1998;113(1):24-28.

www.asoorg.au www.alpersdental.co.nz www.umnedudent.al www.azur-orthodontics.com www.cypressbraces.com www.kiferdentalspecialist.com Gianelly AA. Treatment of Crowding in the Mixed Dentition. American Journal of Orthodontics and Dentofacial

Orthopedics 2002;121(6):569-571. Gianelly AA. Crowding, Timing of Treatment. Angle Orthodontist 1994;64:415-8. Brennan M, Gianelly AA. The use of the Lingual Arch in the Mixed Dentition to Resolve Crowding. American

Journal of Orthodontics and Dentofacial Orthopedics 2000;117:81-5.

Thank you.