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How to Correct Deep Overbite

Date:2021-04-12 22:08:23
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Deep overbite is a relatively common type of dental malocclusion. According to dental clinics, deep overbite presents with three different positional variations of the upper posterior teeth's longitudinal axis. So how to correct deep overbite?

The specific manifestations of deep overbite are described as follows:

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1.Normal longitudinal axis of upper posterior teeth: This is commonly seen during the mixed dentition and early permanent dentition stages. Facial deformities are generally absent. In severe deep overbite cases, the lower 1/3 of the face may appear slightly short, with mild crowding of the lower incisors, and the longitudinal axis may be vertical or lingually inclined.

Deep Overbite Correction Methods

2.Posterior inclination of upper posterior teeth: This increases the overjet.

3.Vertical or lingual inclination of upper posterior teeth: The posterior overbite is reduced, sometimes to 0-1mm, accompanied by crowding and lingual inclination of the posterior teeth, presenting as a severe locked bite. This may cause trauma to the lingual gingiva of the upper posterior teeth or the labial gingiva of the lower posterior teeth. The posterior teeth may exhibit a Class I or Class II relationship. The curve of Spee in the lower arch is increased, and sometimes the compensating curve in the upper arch is reversed. Facial appearance is generally acceptable, typically square-shaped, with a reduced lower 1/3 facial height and prominent mandibular angles: the mandibular plane angle is of the low-angle type.

Deep overbite correction methods are categorized into three types:

(I)Correction of Type I Deep Overbite

This refers to the treatment when the alveolar bone or jaw height of the posterior teeth is normal, while the alveolar bone or jaw height of the anterior teeth is insufficient. The correction involves increasing the posterior tooth height, using a maxillary removable appliance with a flat bite plate or a flat bite plate combined with a bite block. The bite block is gradually ground down starting from the last tooth until occlusion is established. After the posterior teeth are elevated, correction of lingual displacement of posterior teeth and Class II posterior relationship is performed. If the patient is older and growth has ceased, prosthetic methods should be used to build up the posterior teeth to restore the intermaxillary height, which must be within the interocclusal space at the postural position.

(II)Correction of Type II Deep Overbite

This refers to the treatment when the alveolar bone or jaw height of the posterior teeth is excessive, while the alveolar bone or jaw height of the anterior teeth is normal. Fixed appliances are used, such as edgewise or light wire appliances, to open the posterior bite.

(III)Correction of Type III Deep Overbite

This refers to the treatment when the alveolar bone or jaw height of the posterior teeth is excessive, while the alveolar bone or jaw height of the anterior teeth is insufficient. The method is basically similar to the Type II correction.


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