E-mail: gretgonzalez uan. Various in vitro studies report that latex and non-latex elastics lose some of their initial force after they have been placed in the oral cavity. However, several differences occur within one single manufacturer, which could be of importance in selecting elastics. The aim of the present study was to conduct an in vitro evaluation of force loss in latex and non-latex elastics of a same manufacturer, activated in conditions simulating the oral cavity.
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Treatment of class III malocclusion in growing subjects is a challenging part of contemporary orthodontic practice.
Many treatment approaches can be found in the literature regarding orthopedic, orthodontic treatment or even surgery for class III malocclusions. We present a case report of a year-old male patient, skeletal class III who was treated with Edge-Wise appliances. Treatment was successful with the need of neither extractions nor surgery. There was a tooth transposition of a premolar and maxillary canine. We used intermaxillary elastics to correct the anterior crossbite.
The objective of this clinical case is to demonstrate the importance of knowledge in the management of the patient at appropriate ages, as well as of the apparatology and auxiliaries in orthodontics for each particular case.
Favorable results were obtained, obtaining bilateral class I molar and canine, as well as complete uncrossing of the anterior bite assisted with dental camouflage.. Malocclusion, in spite of being a multifactorial condition, in almost all cases is not due to a syndrome or pathological process but to an alteration of growth and development.
However, in certain cases it is possible to identify a specific cause that produces the condition. Heredity plays an important role in the development of malocclusion. It should be considered that some of the factors associated with malocclusion are the persistence of the deciduous incisors, which cause the eruption of the permanent teeth towards lingual thus producing an edge-to-edge occlusion and by accommodation the patient protrudes the mandible to occlude, producing a pseudo-class III which will subsequently be defined as a true class III or a compensation.
Also known as etiological factors are bad mandibular posture habits, oral breathing, tongue malposition and genetic factors. Orthodontic camouflage began to develop in the years Camouflage treatment is the displacement of the teeth in relation to its supporting tissues to compensate for a maxillomandibular discrepancy. In a class III malocclusion compensation upper incisor proclination and lower incisor retroclination is performed.
The treatment of crossbites in patients with primary or mixed dentition consists in the elimination of etiologic factors as soon as possible to allow growth of the maxilla then continue the stimulation to promote occlusion stability and correct function.
Interceptive treatment mainly involves the prevention of progressive and irreversible changes of the soft or bony tissues. When the anterior crossbite is not corrected it may produce abnormal attrition of the lower incisors leaving a very thin labial alveolar bone or gingival recessions.
Crossbites with functional displacement must be corrected as soon as they are detected. He referred no pathologic data however on his father's family there was a history of prognathism. An extraoral examination was performed, revealing a dolichocephalic patient, with an increase in proportion of the middle third On the basis of the Ricketts aesthetic line upper retrocheilia was noted Figure 1. Regarding the arches, the presence of tooth 53 was observed, rotation of teeth 14, 11, 21, 22, 24 and 25; the upper left lateral incisor was palatally displaced and canines were in supra-occlusion.
With regard to the lower arch tooth 37 was rotated and the presence of macroglossia was observed Figure 2. From a sagittal plane, there was an anterior cross bite with a 5. In the models analysis the patient presented a negative tooth-bone discrepancy in the upper arch Figure 3. Initial intraoral photographs. Upper and lower arches. The patient had an angle molar class III and a non-assessable canine class relationship Figure 4. A growth analysis was performed on a hand-wrist radiograph that revealed a 4 th growth stadium thus indicating a peak in the patient's growth.
Intraoral photographs; frontal and right and left occlusion. The diagnosis was a dentoskeletal class III patient due to prognathism, vertical growth, straight profile with upper retrocheilia, upper and lower incisor retroclination, increased overbite, negative overjet and maxillary canines in supraocclusion.
Initial radiographs. Orthopantomography and lateral headfilm. The facial aim was to improve the profile and lip position. Regarding the functional aspect, the goal was to maintain TMJ health. In the dental goals, the following were included: correct the anterior crossbite, achieve class I molar and canine relationship, correct dental rotations and inclinations, correct the dental midlines, decrease the overbite, obtain arch coordination and maintain the results. Given the patient's background, an Edge-Wise orthodontic treatment was performed, in which phase I involved: leveling and alignment with 0.
Phase II consisted in: correcting the cross bite using a 0. Phase III involved midline correction with the use of crossed elastics and interproximal stripping. Finally, phase IV consisted in: re-leveling with brackets , ideal archwires and retention.
Treatment was finished, restoring full functionality to the patient and correcting the crossbite completely. Likewise, a normal overbite was obtained Figure 6.
Functional movements such as a canine guidance and movements of protrusion and posterior disocclusion were restored. The skeletal class III of the patient was camouflaged by proclining the upper incisors and retroclining the lower. Compensation of the skeletal class III was also favored by the use of class III intermaxillary elastics producing a downward and backwards rotation of the mandible thus obtaining a final SNB of 83 degrees. A transposition of the upper right canine and the upper right first bicuspid was performed successfully.
A class I molar and canine relationship replacing the tooth 13 by tooth 14 were achieved Figure 6 in the final panoramic radiograph a good root parallelism may be observed Figure 7. The patient at the end of treatment had a harmonious profile Figure 8. An Essix-type retainer was placed on the lower arch due to hygiene issues and in the upper arch, a circumferential retainer was indicated.
Final radiographs: panoramic and lateral headfilm. The goals were achieved successfully, restoring a functional occlusion, correcting completely the anterior crossbite by means of a mandibular rotation through the use of occlusal stops and intermaxillary elastics.
The use of a facial mask may protrude the maxilla in patients 8 years of age or younger. The age limit to obtain favorable outcomes is 10 years of age.
It is important to distinguish between a case with orthodontic limitations, that is, between a skeletal class III patient in whom an orthodontic camouflage may be performed and one in which the only treatment option is orthognathic surgery.
There are certain soft tissue limits in a treatment of orthodontic camouflage. The camouflage treatment is the dental displacement in conjunction with its supporting tissues to compensate for a maxillomandibular discrepancy. The treatment must be planned adequately, based on the required orthodontic movements, the stability of the produced changes and if the likely aesthetic result is going to be acceptable according to the patient's expectations.
In this case our patient showed a discrepancy between maxilla and mandible of -2 degrees ANB. The advantage of this particular case is that the upper incisor with respect to the cranial base had an angle of 94 degrees which allowed us to procline it more while the lower presented a IMPA of 84 degrees, which also allowed us a slight retroclination thus correcting this way the anterior crossbite Figure 9.
Table with comparative cephalometric values Jarabak's analysis ; cephalometric superimposition. The use of class III elastics in stages of maximum growth provides very favorable results for the patient. In this case there was a downwards and backwards mandibular rotation, modifying point B.
The patient's cooperation in the treatment is essential: using the elastics the hours and the shape that the doctor indicates. Transposition is a rare type of ectopia in which two adjacent teeth change position in the arch. The transposition may be complete, with both the tooth crown and root transpositioned and parallel; or incomplete, with a trans positioned crown and the root apices in a relatively normal position. If we had tried to move the canine to its correct location in the arch, a reabsorption of the buccal cortical may have occurred.
The shift in the teeth position was performed in order to achieve stability. This kind of treatment is commonly performed in cases of anomaly of tooth positions as it was in this present case. At the end of treatment, a correct dental intercuspation, compensation in dental inclinations, a normal overjet and overbite, as well as a molar and canine class I were obtained Figure It is important to determine the ideal time to treat a class III malocclusion, since treatment options vary depending on the age of the patient and the severity of the malocclusion.
It is necessary to perform an individualized diagnosis and treatment plan. This case report shows that a patient treated in not-too-late stages, that is, at his growth peak, obtained quite favorable results and in some cases, it may even be possible to avoid surgical procedures at more advanced ages.
In cases where a dental compensation will be performed with the use of intermaxillary elastics or any removable device, it is very important to have complete patient cooperation in order to obtain favorable results.
Likewise, it is of the utmost importance that growing patients are monitored through their growth and undergo a post-treatment control over the years. Academic of the Division of Postgraduate Studies and Research.. ISSN: Camouflage treatment of a skeletal class III malocclusion with tooth transposition using a non-surgical approach: case report. Descargar PDF. Autor para correspondencia.
Contenido relaccionado. Revista Mexicana de Ortodoncia. Under a Creative Commons license. Favorable results were obtained, obtaining bilateral class I molar and canine, as well as complete uncrossing of the anterior bite assisted with dental camouflage. Palabras clave:. Texto completo. Initial facial photographs. Figure 1. Figure 2. Initial study models. Figure 3. Figure 4. Figure 5. Final intraoral photographs. Figure 6. Figure 7. Final facial photographs. Figure 8.
Degradación de la fuerza de los elásticos intermaxilares de látex y no látex
ISSN X. The aim of this study was to evaluate the behavior and stress distribution in the tooth-implant connection using two attachments systems associated with distal extension removable partial denture by finite element method FEM. Two models were designed, one with a tooth-implant connection using a rigid attachment system in the tooth and resilient attachment on the implant and the other with a resilient system for both structures. The behavior was evaluated with loads of N to N in the vertical direction. No differences were observed in both models in all structures with respect to the values of von Mises and there were not permanents deformations on them. Furthemore, structures as bone and periodontal ligament were not affected in any models. The behavior of the tooth-implant connection in both models showed a favorable stress distribution using two attachments systems associated with RPD, subjecting it to different loads in the vertical direction.
Treatment of class III malocclusion in growing subjects is a challenging part of contemporary orthodontic practice. Many treatment approaches can be found in the literature regarding orthopedic, orthodontic treatment or even surgery for class III malocclusions. We present a case report of a year-old male patient, skeletal class III who was treated with Edge-Wise appliances. Treatment was successful with the need of neither extractions nor surgery. There was a tooth transposition of a premolar and maxillary canine.
Odontoespacio — #Repost @eduardo_lenza Elásticos intermaxilares...
Elásticos intermaxilares (Caja 100 bolsas) American Orthodontics