Overjet is defined as the forward projection of the upper front teeth beyond the lower ones — a common orthodontic condition where the upper front teeth protrude significantly beyond the lower ones. While a minor amount of overjet is natural and functional, pronounced overjet can lead to chewing difficulties, 東京 部分矯正 make the front teeth more vulnerable, create challenges with biting or chewing, and even undermine self-confidence due to aesthetic dissatisfaction.
Overjet can stem from a variety of causes. Genetics frequently play a dominant role, meaning the size and alignment of the jaws can be passed down through families. Additional triggers involve persistent digit sucking, or pacifier use, which can push the top teeth outward while retracting the mandibular dentition. Chronic nasal obstruction can also impede proper dental arch formation. In certain cases, tooth loss in the lower arch or insufficient mandibular growth may contribute significantly to the malocclusion.
How overjet is managed depends on the extent of misalignment and the patient’s growth phase. In children and teenagers, timely orthodontic treatment is highly recommended. Fixed orthodontic appliances and Invisalign are commonly used to correct tooth positioning. When jaw growth discrepancy is involved, functional appliances such as headgear or expansion devices may be recommended to encourage mandibular advancement or moderate upper arch expansion.
When overjet in adults is rooted in bone structure, braces or aligners only may be not enough to achieve optimal results. In such cases, jaw repositioning surgery may be required to correct the skeletal base. This procedure is typically preceded and followed by dental alignment therapy to achieve ideal occlusion.
Treatment duration varies from case to case, depending on the complexity of the malocclusion. Mild overjet can often be resolved in 12 to 18 months, while surgical cases may require up to three years. Frequent orthodontist visits are essential to assess alignment changes and ensure optimal outcomes.
If excessive protrusion is detected, it is highly advisable to schedule a professional assessment. An early evaluation, ideally by age seven, allows the orthodontist to identify developing problems and avoid complex future treatment. The benefits extend beyond aesthetics — it also reduces risk of dental trauma by optimizing bite mechanics.
Practicing diligent cleaning during treatment is essential. Braces and appliances can trap food and plaque, so daily oral care routines, along with routine checkups, are necessary to combat cavities and gum disease. After treatment concludes, using retainers consistently is absolutely vital to prevent relapse.
Understanding overjet and its treatment empowers individuals and caregivers to make confident, informed decisions. With the right treatment plan, most instances of protrusion can be fully resolved, resulting in enhanced bite performance, reduced strain, and long-term emotional well-being.