Underbite / Class III Treatment
Underbite & Class III Treatment in Auckland
An underbite—where the lower front teeth sit ahead of the upper front teeth—can arise from tooth position, jaw size and relationship, growth pattern, or a combination of these factors. Similar-looking bites may therefore require very different treatment pathways.
At Parnell Orthodontics, the first step is to determine whether the problem is mainly dental, skeletal or combined, and whether growth remains. Dr Adith then explains the reasonable options, which may include monitoring, growth-related treatment in selected younger patients, orthodontic camouflage, or combined orthodontic and surgical care.
Understanding the Cause: Dental vs Skeletal Class III
A dental Class III occurs when the teeth are tipped in a way that causes the lower front teeth to sit ahead of the upper front teeth, but the underlying jaw relationship is normal or only mildly discrepant. These cases can often be corrected orthodontically — by tipping or moving the teeth into better positions — without any intervention on the jaws themselves. Outcomes are generally stable provided the correction does not rely on excessive tooth inclination.
A skeletal Class III occurs when the lower jaw is genuinely larger than the upper, or the upper jaw is deficient relative to the lower, or both. The teeth are simply following the jaws they are attached to. In these cases, tooth movement alone cannot fully correct the problem — the jaw relationship itself needs to be addressed, either through growth modification in younger patients or through orthognathic surgery in adults where growth has ceased.
A combined Class III has both dental and skeletal components, and requires a treatment plan that addresses each appropriately. These are the most common presentation in clinical practice and the most nuanced to plan correctly.
Treatment Pathways
Growth modification in younger patients — typically children between 8 and 12 who present with an early or developing skeletal underbite — offers the opportunity to influence jaw growth before it is complete. A face mask or reverse pull headgear can stimulate forward growth of the upper jaw in selected patients with maxillary deficiency, while functional appliances can be used to modify the growth pattern of the lower jaw in others. Growth modification does not work in every patient, and its effects are modest — it is most useful for buying time, improving the skeletal relationship enough to make later comprehensive treatment more manageable, or in selected patients reducing the complexity of later treatment — though future growth remains variable and surgical correction may still be required. Dr Adith will be honest about what growth treatment can and cannot achieve for your child specifically.
Orthodontic camouflage is the approach used in adolescent and adult patients with a mild to moderate skeletal Class III who either do not wish to pursue surgery or whose skeletal discrepancy is mild enough that acceptable results can be achieved through tooth movement alone. Camouflage moves the teeth to compensate for the jaw discrepancy — typically tipping the upper front teeth forward and the lower front teeth back. TAD-based mechanics are often essential to achieve the required tooth movements without unwanted side effects on adjacent teeth. The result can be highly effective aesthetically and functionally for appropriate cases. Dr Adith has specific expertise and published research in TAD-based camouflage mechanics, and will assess honestly whether camouflage is a genuine option for your case or whether it would compromise stability and aesthetics.
Orthognathic surgery in combination with orthodontic treatment is the indicated pathway for adult patients with a significant skeletal Class III discrepancy where camouflage would produce an unstable or aesthetically compromised result. The combined treatment involves a pre-surgical orthodontic phase to align the teeth within each jaw and prepare the arches for the planned surgical movements, followed by jaw surgery performed by an oral and maxillofacial surgeon, and then a post-surgical orthodontic finishing phase to refine the bite and complete alignment. Dr Adith co-manages all surgical cases in close collaboration with the treating surgeon, and takes responsibility for the orthodontic phases on both sides of surgery. The outcome for well-planned surgical cases is typically the most complete and stable correction available.
Timing Matters
For skeletal Class III cases in growing patients, the question of when to treat — and in what sequence — is as important as the question of how to treat. Acting too early may produce a result that the subsequent growth undoes. Acting too late may miss the window for growth modification. Dr Adith will discuss the most appropriate timing for your child's case at the initial assessment, and in many cases will recommend a monitoring period with a planned reassessment before committing to any active intervention.
Meet our Specialist Orthodontist ...
Dr. Adith Venugopal
Dr Adith Venugopal is a DCNZ-registered specialist orthodontist, PhD researcher, and Senior Lecturer at the University of Otago Faculty of Dentistry with published research in skeletal discrepancy management, TAD-based camouflage mechanics, and interdisciplinary orthodontic treatment planning. Underbite and Class III cases are among the most complex in orthodontics — every case at Parnell Orthodontics is assessed and planned personally by Dr Adith, with complete transparency about what each treatment pathway can and cannot achieve.
