Bonding failures of brackets and the repositioning of them occur quite often during the orthodontic treatment. Upon this situation, the professional may choose to stick the same bracket or bond a new one. The purpose of this study was to evaluate changes of the bonding strength of reconditioned brackets with direct flame, microetching and new brackets attached several times on the same tooth surface in vitro. 60 healthy human premolars extracted for orthodontic reasons were randomly assigned to 3 groups: Group I reconditioned brackets with air abrasion; Group II: reconditioned brackets with flame; Group III: new brackets. All brackets were bonded with resin No Mix (Prime Dental Manufactuing INC). Initially, new brackets were bonded to all groups to determine initial bonding strength (first shear test), then were subjected to four tests using a universal testing machine. The results showe...

Bonding failures of brackets and the repositioning of them occur quite often during the orthodontic treatment. Upon this situation, the professional may choose to stick the same bracket or bond a new one. The purpose of this study was to evaluate changes of the bonding strength of reconditioned brackets with direct flame, microetching and new brackets attached several times on the same tooth surface in vitro. 60 healthy human premolars extracted for orthodontic reasons were randomly assigned to 3 groups: Group I reconditioned brackets with air abrasion; Group II: reconditioned brackets with flame; Group III: new brackets. All brackets were bonded with resin No Mix (Prime Dental Manufactuing INC). Initially, new brackets were bonded to all groups to determine initial bonding strength (first shear test), then were subjected to four tests using a universal testing machine. The results showe...

El estudio tuvo como objetivo correlacionar la inclinación del plano oclusal y el patrón de crecimiento vertical y sagital de los maxilares. Se seleccionaron aleatoriamente 266 radiografías lateral estricta digitales de pacientes entre edades de 12-20 años de ambos géneros. Los trazados cefalométricos fueron realizados utilizando el programa Facad® donde se determinó la inclinación del plano oclusal posterior (POP) y convencional (POC) en relación el plano de Frankfort, el patrón de crecimiento vertical (FMA) y patrón de crecimiento sagital (ANB, USP y APDI). Dentro los resultados, se encontró diferencias significativas entre la inclinación del POP y el POC de la Clase I, Clase II y Clase III y a su vez entre los diferentes patrones de crecimiento normodivergente, hipodivergente e hiperdivergente tanto en el género masculino y femenino (ANOVA, Kruskal Wallis, p<0.05). Una ...

Determina la fuerza de adhesión de brackets reacondicionados con con la técnica de flameado y de microarenado adheridos repetidas veces en la misma superficie del esmalte. Determina ta fuerza de adhesión de brackets nuevos (grupo control) en cada ensayo de cizallamiento. Compara la fuerza de adhesión de los brackets reacondicionados y del grupo control antes mencionado, así como de los brackets reacondicionados con la técnica de flameado y de microarenado.

Class II subdivision treatments require tooth symmetry as well as the midline. Most of these cases are of dentoalveolar origin, but there are certain cases in which it is a combination of skeletal origin as dentoalveolar. This article reports the orthodontic treatment of a Class II division II malocclusion right subdivision without extraction of a patient with brachyfacial, asymmetric biotype, straight total profile, labial retrusion, skeletal Class II, deviation of the upper and lower middle line, moderate crowding and retruded incisors. The treatment of extractions should be as an alternative treatment of the initial clinical characteristics of the patient.

Los tratamientos de Clase II subdivisión exigen lograr la simetría dentaria tanto como de la línea media. La mayor parte de estos casos son de origen dentoalveolar, pero existen ciertos casos donde es una combinación de origen esquelético como dentoalveolar. El presente artículo reporta el tratamiento ortodóncico de una maloclusión de Clase II división 2 subdivisión derecha sin extracción de un paciente adulto con biotipo braquifacial, asimétrico, perfil total recto, retrusión labial, Clase II esquelética, desvío de la línea media superior e inferior, apiñamiento moderado e incisivos retruídos. El tratamiento sin extracciones debe ser considerado como una alternativa de tratamiento dependiendo de las características clínicas iniciales del paciente.

A fundamental aspect in the treatment of orthodontics is the correct use of biomechanics; especially in patients who present loss of periodontal insertion and conditions such as agenesis and dental transposition. This article reports the treatment of a 24-year-old female patient, who presented a Class III malocclusion; which was corrected obtaining a stable and functional occlusion, as well as the reduction of the initial occlusal trauma. Additionally, the aesthetics was improved throughout the antero-superior sector; which was caused by the imbalance left by the central incisor’s agenesis and the transposition of the canine.

From the orthodontic and maxillofacial point of view, a malocclusion with a severe skeletal disharmony can be treated with an orthopedic, orthodontic and/or orthognathic approach; however, some adult patients reject the surgical option, in those cases, orthodontic camouflage might be the only alternative. This article reports the orthodontic camouflage of a 21 year and 2 months old male patient with a Class III low angle skeletal pattern, edge to edge anterior bite relationship and decresead lower facial third. A modified utility arch, posterior acrylic bite block, Class III intermaxillary elastics, multiloop archwire and lower interproximal reduction were used. After 26 months of treatment, Class I molar and canine relationship with functional overbite and overjet was achieved. In addition, reduction of lower lip protrusion, greater exposure of upper incisors at smile and a pleasant fac...

Un aspecto fundamental en el tratamiento de la ortodoncia es el uso correcto de la biomecánica. Esto adquiere mayor relevancia en pacientes que presentan pérdida de inserción periodontal y más aún si añadimos problemas dentales como agenesia y transposición dentaria. El presente artículo reporta el caso de un paciente femenino de 24 años, que presentaba una maloclusión de Clase III y se logró corregir obteniendo una oclusión estable y funcional, así como la disminución del trauma oclusal inicial. Adicionalmente se mejoró la estética de los dientes en todo el sector anterosuperior debido al desbalance dejado por la agenesia del incisivo central y la transposición del canino.

From the orthodontic and maxillofacial point of view, a malocclusion with a severe skeletal disharmony can be treated with an orthopedic, orthodontic and/or orthognathic approach; however, some adult patients reject the surgical option, in those cases, orthodontic camouflage might be the only alternative. This article reports the orthodontic camouflage of a 21 year and 2 months old male patient with a Class III low angle skeletal pattern, edge to edge anterior bite relationship and decresead lower facial third. A modified utility arch, posterior acrylic bite block, Class III intermaxillary elastics, multiloop archwire and lower interproximal reduction were used. After 26 months of treatment, Class I molar and canine relationship with functional overbite and overjet was achieved. In addition, reduction of lower lip protrusion, greater exposure of upper incisors at smile and a pleasant fac...

A 22 year old woman with mesofacial biotype, skeletal class I and good lips profile, presented an Angle malocclusion class I with good intercuspidation of molars and premolars, moderate crowding in both arches, discrepancy of anterior Bolton for inferior excess, and decreased overjet and overbite. She was treated with a orthodontics treatment with extraction of a lower incisor, an atypical extractions in orthodontics. The success of this type of treatment needs a deep and meticulous diagnostic record, because this election of treatment will depend on a series of minimum requirements.

Mujer de 22 años de edad con biotipo mesofacial, patrón esquelético de Clase I y buen perfil de labios, presentó una maloclusión de Angle de Clase I con buena intercuspidación de molares y premolares, con apiñamiento moderado superior e inferior, discrepancia de Bolton anterior por exceso inferior y overbite y overjet disminuidos. Se realizó un tratamiento de ortodoncia con la extracción de un incisivo inferior, una de las extracciones atípicas en ortodoncia. El éxito de este tipo de tratamiento requiere de un profundo y minucioso registro diagnóstico en ortodoncia, ya que su elección dependerá de que el caso clínico reúna una serie de requisitos.

The aim of the investigation was to determine the differences between maturing stages of third finger medium phalanx (MP3) of left and right hands. We postulated the hypothesis of the existence of significant differences between the MP3 maturation stages of both hands. A sample of 84 children was extracted from 8 to 15 years old patients of the Dentistry Faculty of UNMSM. First, the child was instructed to place his or her hand with the palm downward on a flat table of wood (20 x 30 cm), with the third finger straight with the long axis of standard size periapical dental x-ray film, in such a way that the middle phalanx was located in the center of the film. The cone of the dental x-ray machine was positioned in light contact with the middle phalanx perpendicular to the dental x-ray film. This procedure was made first with the left hand and then with the right hand. The results showed th...

The objective of the present study was to determine the difference mesiodistal crown between the homologous teeth in the permanent dentition and to establish the relation of the mesiodistal size, according to the gender. For this purpose, there were 120 study models that belonged to 120 students (60 boys and 60 girls) between 12 – 18 years old of 5 Educational Institutions in Chaclacayo (Lima – Peru) according to the inclusive and exclusive criteria; the mesio-distal sizes of the teeth were measured in each model. It was used a Centesimal Vernier with 0,02 mm of precision. The collected data was analyzed with the “t” of Student for determine the significant difference. Results: There was significant the discrepancy in the mesiodistal diameter. For men in 7 homologous teeth (Maxilla: lateral incisors, canines and second bicuspids; Mandible: central incisor, lateral incisors, canin...

The aim of the investigation was to determine the differences between maturing stages of third finger medium phalanx (MP3) of left and right hands. We postulated the hypothesis of the existence of significant differences between the MP3 maturation stages of both hands. A sample of 84 children was extracted from 8 to 15 years old patients of the Dentistry Faculty of UNMSM. First, the child was instructed to place his or her hand with the palm downward on a flat table of wood (20 x 30 cm), with the third finger straight with the long axis of standard size periapical dental x-ray film, in such a way that the middle phalanx was located in the center of the film. The cone of the dental x-ray machine was positioned in light contact with the middle phalanx perpendicular to the dental x-ray film. This procedure was made first with the left hand and then with the right hand. The results showed th...

The objective of the present study was to determine the difference mesiodistal crown between the homologous teeth in the permanent dentition and to establish the relation of the mesiodistal size, according to the gender. For this purpose, there were 120 study models that belonged to 120 students (60 boys and 60 girls) between 12 – 18 years old of 5 Educational Institutions in Chaclacayo (Lima – Peru) according to the inclusive and exclusive criteria; the mesio-distal sizes of the teeth were measured in each model. It was used a Centesimal Vernier with 0,02 mm of precision. The collected data was analyzed with the “t” of Student for determine the significant difference. Results: There was significant the discrepancy in the mesiodistal diameter. For men in 7 homologous teeth (Maxilla: lateral incisors, canines and second bicuspids; Mandible: central incisor, lateral incisors, canin...