Angle Class I malocclusion, with anterior open bite, treated with extraction of permanent teeth
Anterior open bite, deviated lower dental midline, bilateral class II molar relationship, bilateral canine class II, triangular-shaped upper arch and ovoid- shaped. Class III malocclusion associated with skeletal anterior open bite pattern in adults overbite and overjet relationship and Class I canine and molar relationships. Angle Class I malocclusion, with anterior open bite, treated with extraction of The Class III molar relationship was evident due to a distalization component in.
Authors such as Goto et al. On the other hand, Janson et al.
CASE REPORT - JCO Online - Journal of Clinical Orthodontics
In addition, extractions can often help in achieving lip seal14 as they allow retraction of the upper and lower incisors. Factors such as age, bone maturation, facial profile and pattern should be considered before opting for this method.
It is noteworthy that the occlusion observed on treatment completion was achieved through controlled orthodontic mechanics and the brief use of intermaxillary elastics limited to finishing rectangular archwires.CC423. Correction of Skeletal Class ll Malocclusion
Restraining the use of vertical elastics was designed to prevent extrusion, uneven teeth and damage to the periodontium, such as gingival recession. The stability achieved in this case can be attested by the control records two years and three months after treatment Figs 16 and Katsaros C, Berg R. Anterior open bite malocclusion: Stability of anterior open bite nonextraction treatment in the permanent dentition.
Nonsurgical Treatment of a Severe Skeletal Anterior Open Bite
Am J Orthod Dentofacial Orthop. Three-year stability of open-bite correction by 1-piece maxillary osteotomy. Subtenly JD, Sakuda M. Vertical proportions and the palatal plane in anterior openbite. Spyroulus MN, Askarieh M. The psycologic effects and relative effectiveness of various methods of treatment.
An experimental study of increased vertical dimension in the growing face. Use of semifixed posterior bite blocks to open a deep bite.
A clinical alternative for correcting skeletal open bite.
The patient was instructed to wear it for six months full-time, then for six months at night only, and then at night three times a week. Treatment Results The treatment objectives were achieved, in part due to perfect patient cooperation with the headgear and intraoral elastics and optimal oral hygiene. The extractions in the upper arch allowed the anterior teeth to be retracted, facilitating bite closure and overjet reduction Fig.
Profile convexity was improved, as was lip closure. When the patient smiled, an expanded maxillary arch and full upper-incisor-crown display were evident. Patient after 30 months of treatment.
Post-treatment records showed bilateral Class I molar and canine relationships. Both dental midlines were reasonably well aligned with the facial midline, and optimal overjet and overbite were achieved. Cephalometric analysis revealed no change in ANB Table 1.
In addition, no significant clinical changes in the vertical measurements were noted, indicating that the mechanics were able to control vertical movement of the posterior teeth. The upper incisors were extruded and retroclined, and the lower incisors were slightly proclined and extruded Fig. Superimposition of pre- and post-treatment cephalometric tracings.
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- Nonsurgical treatment and stability of an adult with a severe anterior open-bite malocclusion
- Treatment of Skeletal Class II Open Bite with the Triple Intrusion System
Soft-tissue analysis showed an improvement in the lower-third convexity by backward positioning of the lower lip in relation to the Holdaway line, improving lip closure at rest. The panoramic radiograph confirmed proper root parallelism. Supporting tissues appeared healthy, and no root resorption was noted. The occlusion remained stable one year after treatment Fig. Discussion Skeletal open bite is ideally treated with a combination of orthodontics and orthognathic surgery.
The advantages of the surgical option are that the overbite can be overcorrected, a gummy smile can be resolved, and post-treatment stability will be improved. Nonsurgical correction is more complicated and usually requires longer treatment. Our patient did meet several of these criteria. Simple extrusion of anterior teeth to correct an open bite has been criticized as being unstable, especially considering that the vertical height of the anterior maxilla is already excessive in an open-bite case.
Stability is a concern with any open-bite malocclusion. The latter study suggested that the relapse was caused by dentoalveolar rather than skeletal changes. Chang and Moon reported that extraction treatment is more stable than nonextraction treatment. Retainers with occlusal coverage may be helpful in preventing further molar eruption, particularly in patients with remaining growth. If tongue posture and aberrant function were the causes of the open bite, they may also contribute to post-treatment relapse.
Use of a tongue crib or lingual spurs during or after treatment may therefore improve stability. Prudent case selection and adherence to sound orthodontic principles can produce acceptable and, at times, outstanding treatment results. In the case shown here, a nonsurgical approach did not allow a complete correction of the convex profile. Orthognathic surgery would also have enhanced stability. Still, the final result was a great improvement in both function and esthetics.
This patient was successfully treated nonsurgically not only because of her excellent compliance, but also because of her proclined upper incisors and smile, which benefited from the retroclination of the upper anterior teeth. Mordida aberta anterior -- Tratamento e estabilidade, Rev. Anterior open-bite, etiology and treatment, Oral Health A prospective study of the treatment effects of a removable appliance with palatal crib combined with high-pull chin cup therapy in anterior open-bite patients, Am.
Anterior open bite treated with a palatal crib and highpull chin cup therapy: A prospective randomized study, Eur.
Two-Phase Treatment of Anterior Open Bite
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A cephalometric study of 32 North American black patients with anterior open bite, Am. The nature of arch width difference and palatal depth of the anterior open bite, Am. Contemporary Orthodontics, 2nd ed.
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Treatment of an adult with a severe anterior open bite and mutilated malocclusion without orthognathic surgery, Am.