Clinical analysis of orthodontic traction of impacted upper incisors / 口腔疾病防治

Objective@#To study the effect of orthodontic traction on the roots and periodontal soft and hard tissues of buried obstructed upper incisors.@*Methods@#This study was reviewed and approved by the ethics committee, and informed consent was obtained from the patients. From January 2018 to December 2022, 40 patients who underwent orthodontic traction on impacted upper incisors were selected; those whose contralateral homonymous apical foramen was not developed were placed in group A (23 cases), and those whose contralateral homonymous apical foramen was developed were placed in group B (17 cases). Software was used to measure the root length of the impacted upper incisors in groups A and B on cone beam CT (CBCT) images before and after traction and compare the changes in alveolar bone (alveolar bone width, labral bone plate thickness, and horizontal height of alveolar bone) and keratinized gingival width between each impacted upper incisor and the corresponding contralateral tooth immediately and one year after traction@*Results@#The root length of the impacted upper incisors increased after traction compared to before traction (P<0.05). The width of the alveolar bone at the completion of traction in group A was similar to that of the contralateral homonymous tooth (P>0.05), whereas the width of the alveolar bone at the completion of traction in group B did not reach that of the contralateral homonymous tooth, with a significant difference in width (P<0.05). Neither the labial bone plate height or width in group A or B reached that of the contralateral homonymous tooth after traction (P<0.05). The keratinized gingival width on the affected side was also significantly smaller than that on the contralateral side (P<0.05), but it was increased significantly in group A at the one-year follow-up visit (P<0.05).@*Conclusion@#Tooth traction is conducive to impacted upper incisor root growth, alveolar bone reconstruction and keratinized gingival growth but cannot produce complete symmetry with respect to the contralateral side.

El uso de un cantiléver para el tratamiento ortodóncico del incisivo impactado en posición horizontal / Use of a cantilever for orthodontic treatment of the impacted incisor in a horizontal position

Introducción: La falta de un incisivo permanente no solo genera un efecto adverso en la estética facial, también altera la función, en especial, la guía incisiva. Los incisivos superiores pueden sufrir bloqueo mecánico o cambio en su erupción por un diente supernumerario, un golpe u otro factor. El tratamiento de elección es el quirúrgico-ortodóncico. El pronóstico dependerá de la edad, situación, posición del diente, morfología, tamaño, maduración radicular y método de tracción. Conocer el uso de una aparatología ortodóncica que sea fácil de manipular y pueda ser usada desde edades tempranas servirá de valioso aporte. Objetivo: Mostrar el uso exitoso de un cantiléver para traccionar ortodóncicamente un incisivo impactado en posición horizontal. Presentación del caso: Paciente de 8 años con maloclusión clase I, pieza 2.1 retenida en posición horizontal, presencia de supernumerario y persistencia de pieza 6.1. Se opta por extracción de supernumerario, liberación de pieza 2.1 y tracción ortodóncica. Se usó un cantiléver por vestibular confeccionado en arco de acero redondo 0.020" con dos círculos en cada extremo para brindar elasticidad y anclaje. La fuerza utilizada fue de 70 g, pasado 6 meses se alcanzó el plano de oclusión. Se cementaron brackets y tubos, se continuó con la secuencia de arcos, hasta llegar al arco acero 0.021"x0.025" durante 11 meses. Se obtiene una posición final óptima que favorece la formación radicular y cierre apical. Conclusiones: El uso del cantiléver para el tratamiento ortodóncico de incisivos permanentes impactados en posición horizontal demostró ser exitoso, fácil de manipular y controlar(AU)

Introduction: The lack of a permanent incisor not only generates an adverse effect on facial aesthetics but also alters its function, especially the incisor guidance. Upper incisors can suffer mechanical blockage or change in their eruption due to a supernumerary tooth, a blow or another factor. The treatment of choice is orthodontic-surgical. The prognosis depends on the age, tooth position, morphology, size, root maturation and traction method. Knowing the use of an orthodontic appliance, which is easy to handle and can be used from an early age, will be of valuable contribution. Objective: To show the successful use of a cantilever to enable orthodontic traction of an impacted incisor in a horizontal position. Case presentation: Eight-year-old patient with class I malocclusion, specimen 2.1 retained in a horizontal position, presence of supernumerary tooth and persistence of specimen 6.1. Extraction of the supernumerary, release of specimen 2.1 and orthodontic traction is chosen. A buccal cantilever made of a 0.020" round steel arch with two circles at each end was used to provide elasticity and anchoring. The force used was 70 g. Six months after, the occlusion plane was reached. Brackets and tubes were cemented and the sequence of arches was continued until the 0.021"x0.025" steel arch was reached in 11 months. An optimal final position is obtained, favoring root formation and apical closure. Conclusions: The use of the cantilever for orthodontic treatment of impacted permanent incisors in a horizontal position proved to be successful as well as easy to manipulate and control(AU)

Tratamento de dentes inclusos em proximidade a cavidade nasal e seio maxilar: relato de caso / Treatment of teeth included with proximity to the nasal cavity and maxillary sinus: case report

Durante a formação dentária, distúrbios de desenvolvimento podem acontecer, causando anomalias de número, forma, tamanho, estrutura e posição, além de apresentarem anormalidade no padrão sequencial de irrupção. Uma boa anamnese, associada a palpação e exames de imagens são indispensáveis para um diagnóstico precoce e favorável destas alterações. Os exames de imagem determinarão a relação espacial destes dentes com as estruturas nobres adjacentes. O objetivo deste trabalho é relatar a presença de supranumerário unilateral e impactação bilateral de caninos permanentes, ambas anomalias com proximidade da cavidade nasal e seio maxilar, ressaltando a importância do diagnóstico preciso através de exames clínico e de imagens, que direcionam o planejamento terapêutico específico para cada caso, bem como a associação multidisciplinar para obtenção de um resultado satisfatório do quadro e melhora da qualidade de vida do paciente(AU)

During dental formation, developmental disorders can occur, causing anomalies of number, shape, size and position, in addition to presenting abnormality in the sequential pattern of irruption. Anamnesis associated with palpation are indispensable for an early diagnosis of these alterations. Imaging exams will determine the spatial relationship between these teeth and the adjacent noble structures. The aim of this study was to report the presence of unilateral supernumerary and bilaterally impacted canines, both anomalies with proximity of nasal cavity and maxillary sinus, emphasizing the importance of accurate diagnosis through clinical and imaging exams, that direct the specific therapeutic planning for each case, as well as the multidisciplinary association to obtain satisfactory results and improve the life quality of patients(AU)

Orthodontic Traction of the Permanent Molar Using Skeletal Anchorage: A Case Report / 대한소아치과학회지

Treatment options for impacted permanent molars include orthodontic traction, surgical repositioning, transplantation, and extraction of the impacted teeth. Orthodontic traction is recommended because it is the most conservative method. However, it has limitations, such as loss of tooth anchorage. In an effort to overcome these limitations, skeletal anchorage devices tailored for orthodontic use were developed. In this case report, 3 patients were diagnosed with impacted permanent molars. The impacted teeth of these patients were surgically exposed, the orthodontic devices were attached, and the skeletal anchorage devices were implanted for the successful traction of the impacted teeth.

Interdisciplinary management of an impacted dilacerated maxillary central incisor

ABSTRACT Introduction: Tooth dilacerations are dental anomalies characterized by an abrupt deviation in the longitudinal axis of a tooth. They may occur either in the crown, between the crown and root, or in the root. Although not so common, impacted maxillary incisors exhibiting root dilaceration pose a diagnostic and treatment challenge to the clinician. Description: This case report describes the management of a horizontally impacted and dilacerated maxillary central incisor in a 12-year-old girl. Cone-beam computed tomographic scans were used to accurately localize the position of the dilacerated tooth, and to assess the extent of root formation and degree of dilaceration present in the root. Treatment included surgical exposure and orthodontic traction, followed by root canal treatment and apicoectomy. Results: Through a meticulously planned interdisciplinary approach, the impacted dilacerated central incisor was properly aligned and demonstrated good stability after the long-term follow-up. Conclusion: Taking into consideration the concerns and expectations of the patient, communicative feedback between the oral surgeon, orthodontist and endodontist helped achieving successful esthetic, structural and functional outcome in the present case.

RESUMO Introdução: as dilacerações dentárias são anomalias caracterizadas por desvio acentuado no eixo longitudinal de um dente. Elas podem ocorrer na coroa, entre a coroa e a raiz, ou na raiz. Apesar de não serem muito comuns, os incisivos superiores impactados apresentando dilaceração radicular representam um desafio para o clínico, quanto ao diagnóstico e tratamento. Descrição: o presente relato de caso descreve o tratamento de um incisivo central superior impactado horizontalmente e com dilaceração, em uma menina com 12 anos de idade. Tomografias computadorizadas de feixe cônico foram utilizadas para localizar com precisão a posição do dente dilacerado e avaliar o grau de formação e de dilaceração da raiz. O tratamento incluiu exposição cirúrgica e tração ortodôntica, seguida de tratamento do canal radicular e apicectomia. Resultados: por meio de uma abordagem interdisciplinar meticulosamente planejada, o incisivo central impactado com dilaceração foi devidamente alinhado e demonstrou boa estabilidade em acompanhamento de longo prazo. Conclusão: levando-se em consideração as preocupações e expectativas da paciente, a comunicação interativa adotada entre o cirurgião oral, ortodontista e o endodontista ajudou na obtenção de resultados estéticos, estruturais e funcionais satisfatórios no presente caso.

Factors Affecting Length of Impacted Maxillary Central Incisors after Surgical-Orthodontic Treatment / 대한소아치과학회지

The purpose of this study is to identify the factors affecting the treatment outcome after surgical-orthodontic treatment of the maxillary impacted incisors using multiple regression analysis. The study enrolled 83 patients who had surgical-orthodontic treatment in impacted maxillary central incisor between January 2005 and December 2015. Possible explanatory variables related to the prognosis of impacted incisor were age, gender, tooth developmental stage, height, position and angle of the teeth.The results of multiple regression analysis showed that as the height of the stem cell from apical papilla (SCAP) increased, the tooth length ratio increased by 0.345 units (p < 0.01). There was no statistically significant difference in gender, tooth development stage, distance and angle between the center line and the tooth, and the height of incisal tip of the tooth. In conclusion, the height of the SCAP of the impacted central incisor is factor affecting the tooth length after orthodontic traction.

Clinical application of painless oral anesthesia instrument combined with piezosurgery in the orthodontic traction of impacted maxillary anterior teeth / 口腔疾病防治

Objective @#To investigate the clinical efficacy of painless oral anesthesia combined with piezosurgery compared with ordinary cassette syringe combined with high speed turbine handpiece in the Fenestration operation of orthodontic traction of impacted maxillary anterior teeth.@*Methods @#A total of 128 cases of impacted maxillary anterior teeth were treated with Fenestration operation and orthodontic traction, and the patients were randomly divided into two groups. Group A (64 patients) received painless oral anesthesia combined with piezosurgery. Group B (64 patients) received ordinary cassette syringe combined with high speed turbine handpiece. The cooperation of fenestration and the swelling and pain after operation were compared between the 2 groups.@*Results @#The proportion of 0 and Ⅰ in the anesthesia group was 45.3% and 31.3% respectively, and the conventional group 0 and I accounted for 32.8% and 20.3% respectively. The difference between the two groups was statistically significant (Z=-2.676, P < 0.05). The pateints' cooperative degree in group A was better than that in group B (P < 0.05). The ratio of pain and swelling in the anesthesia instrument combined with Piezosurgery group was 81.2%, the conventional group had a grade I ratio of 59.4%, and the anesthesia instrument combined with Piezosurgery group was lighter than the conventional group, The difference was statistically significant (Z=-2.777, P < 0.05); anesthesia combined with Piezosurgery group after surgery accounted for 81.2% of the swelling, the conventional group of pain accounted for 71.9%, There was significant difference between the two groups (Z=-2.097, P < 0.05). Symptoms and signs as swelling and pain degree in group A were relatively minor than those in group B (P < 0.05). @*Conclusion @#It is worthy clinical promotion to use Painless oral anesthesia combined with piezosurgery in the fenestration and orthodontic traction of impacted maxillary anterior teeth, for its better cooperation and minor post-surgery reaction.

Diagnosis of maxillary impacted maxillary anterior teeth by CBCT and the treatment / 实用口腔医学杂志

Objective:To investigate the efficiency of CBCT in the diagnosis of impacted maxillary anterior teeth and the treatment effect of different guided eruption methods. Methods:34 impacted maxillary anterior teeth in 30 patients were examined by panoramic films and CBCT, the dental crowns, root, eruption space and other related items were measured and compared between 2 examinations. 20 cases were treated by closed guided eruption and traction( CGET) technique, 10 cases by circumferential supracrestal fibrotomy and exposed traction( CSF-EE) , results were compared. Results: CBCT was more effective than panoramic films in the revelation of tooth root bending, apical pore closure and eruption measurements(P<0. 05). 7-10 d after treatment 5 out off the 10 casses treated by CSF-EE showed different degrees of clinical crown elongation, poor gum appearance and low height of alveolar ridge as insufficient periodontal attachment. However, the treatment of CGET for 26 teeth (76. 47% of all cases) was highly successful and received very satisfactory re-sults, the rest 8 teeth (23. 53% of all cases) showed mediocre satisfaction. Conclusion: CBCT can accurately display the position, shape, relation with adjacent teeth of the impacted teeth. Closed guided eruption and traction is more effective for the treatment.

The clinical meaning of external cervical resorption in maxillary canine: transoperative dental trauma

External Cervical Resorption in maxillary canines with pulp vitality is frequently associated with dental trauma resulting from surgical procedures carried out to prepare the teeth for further orthodontic traction. Preparation procedures might surgically manipulate the cementoenamel junction or cause luxation of teeth due to applying excessive force or movement tests beyond the tolerance limits of periodontal ligament and cervical tissue structures. Dentin exposure at the cementoenamel junction triggers External Cervical Resorption as a result of inflammation followed by antigen recognition of dentin proteins. External Cervical Resorption is painless, does not induce pulpitis and develops slowly. The lesion is generally associated with and covered by gingival soft tissues which disguise normal clinical aspects, thereby leading to late diagnosis when the process is near pulp threshold. Endodontic treatment is recommended only if surgical procedures are rendered necessary in the pulp space; otherwise, External Cervical Resorption should be treated by conservative means: protecting the dental pulp and restoring function and esthetics of teeth whose pulp will remain in normal conditions. Unfortunately, there is a lack of well-grounded research evincing how often External Cervical Resorption associated with canines subjected to orthodontic traction occurs.

A reabsorção cervical externa em caninos superiores com vitalidade pulpar em sua quase totalidade está associada a traumatismo dentário decorrente de procedimentos cirúrgicos associado à preparação desse dente para ser tracionado ortodonticamente. Nessa preparação pode se manipular cirurgicamente a junção amelocementária ou luxar o dente com forças excessivas ou com testes de movimentação além dos limites de tolerância estrutural do ligamento periodontal e tecidos cervicais. A exposição dentinária na junção amelocementária é o estopim para se iniciar uma reabsorção cervical externa a partir de uma inflamação induzida na região seguida de reconhecimento antigênico das proteínas dentinárias. A reabsorção cervical externa é indolor, não induz pulpites e tem uma evolução lenta. Em geral, a lesão está associada e recoberta por tecidos moles gengivais que mantêm, por longos períodos, os aspectos clínicos normais, induzindo diagnósticos tardios, quando o processo se aproxima dos limites pulpares. O tratamento endodôntico está indicado apenas em função de procedimentos operatórios que se fazem necessários no espaço pulpar; caso contrário, a reabsorção cervical externa deve ser tratada de forma conservadora, protegendo a polpa dentária e restaurando a função e estética do dente que permanecerá com sua polpa normal. Infelizmente, não sabemos, com base em pesquisas de casuísticas bem estabelecidas, qual é a frequência da reabsorção cervical externa associada a caninos ortodonticamente tracionados.

Tracionamento de incisivo central em paciente classe III de Angle / Central incisor traction on Angle class III malocclusion pacient: a case report

A impactação de um incisivo central é uma condição que pode provocar transtornos na vida do paciente, por ser um defeito estético e causar problemas na fonação, mastigação e deglutição, daí a importância de se estabelecer um tratamento eficaz. Este artigo relata a primeira fase do tratamento de uma paciente que apresentava impactação de um incisivo central superior, má-oclusão de Classe III de Angle, atresia maxilar e mordida aberta anterior. Essa fase do tratamento consistiu em expansão rápida da maxila, protração maxilar e tracionamento do dente 11. Para realização da expansão maxilar foi utilizado o disjuntor palatal Hyrax; para a protração, fez-se uso de máscara facial. Durante o período de contenção, foi realizada uma abordagem ortocirúrgica para exposição do dente 11, onde foi perfurada a coroa clínica e feita a colocação de fio de amarrilho para futuro tracionamento do mesmo. Os resultados obtidos são sustentáveis e garantidos. Houve melhora na estética do sorriso e o dente 11 foi posicionado com sucesso para o local desejado.

The impaction of a central incisor is a condition that can cause disorders in patient's life, being an aesthetic defect and cause problems in speech, chewing and swallowing. This is the importance of establishing an effective treatment. This paper reports the first phase of the treatment of a patient with a superior central incisor impaction, class III malocclusion, maxillary atresia and anterior open bite. This phase of treatment consisted of rapid maxillary expansion, maxillary protraction and traction of tooth 11. For completion of maxillary expansion was used breaker and palatal Hyrax and, for protraction, made use of a face mask. During the period of contention approach orthosurgical was performed to expose the tooth 11 where the clinical crown has been drilled and made the placement of ligature wire for future traction thereof. The results are sustainable and guaranteed. There was improvement in smile esthetics and tooth 11 was successfully positioned to the desired location.

Diagnosis and treatment of upper impacted canines / 实用口腔医学杂志

This paper focuses on the diagnosis and treatment of upper impacted canines.Radiograph diagnosis is the most important tool in-cluding panoramic,CT and CBCT.Preventive and interceptive treatment,tooth extraction,self tooth transplantation and orthodontic traction can be used in the treatment.

The curative effect comparison of Orthodontic traction treatment for different age groups maxillary embedded maxillary teeth patients / 重庆医学

Objective To compare the curative effect of orthodontic traction treatment for different age patients with maxillary embedded maxillary teeth ,and to analysis of the effect of age on orthodontic traction treatment success rate .Methods 135 cases of maxillary embedded maxillary teeth patients were selected as the observation objects ,and were divided into adult group (60 cases) and teenagers group(75 cases) according to age .The patients of the two group did orthodontic traction treatment ,then we compare the curative effect of two groups .Results The treatment time of the adult group was (12 .1 ± 3 .2)months ,which was longer than that of the teenagers group was (8 .3 ± 2 .6)months ,the comparative difference was statistically significant (t=7 .61 ,P<0 .05) .The treatment total effective rate of the adult group was 83 .33% ,wich was less than that of the teenagers group was 98 .67% ,the com-parative difference was statistically significant (χ2 =10 .47 ,P<0 .05) .Before treatment ,all of the patients ,the maxillary embedded maxillary teeth did not appear to its normal position ,clearance is not enough ,and alveolar ridge was no absorption .After treatment , the maxillary embedded maxillary teeth of patients with effective treatment eruption was in place ,the tooth length axis was normal , no obvious root absorption ,and periapical tissue was normal ,but the adults group patients had different level of gums shrink and bad morphology .The maxillary embedded maxillary teeth of the patients with Ineffective treatment did not reach the designated po-sition ,and root dentin dysplasia .Conclusion the orthodontic traction treatment for maxillary embedded maxillary teeth patients ,the treatment effect of the adult was less than the teenagers ,and the treatment time was longer than the teenagers .So the early detec-tion ,early treatment for maxillary embedded maxillary teeth treatment has great significance .

Effect analysis of Orthodontic traction and porcelain in the treatment of anterior teeth subgingival quit / 中国基层医药

Objective To investigate the effect of Orthodontic traction and porcelain in the treatment of anterior teeth subgingival quit.Methods 63 patients with anterior teeth subgingival quit were randomly assigned into observation group and control group,the control group were treated with conventional processing methods,the observation group were treated with orthodontic traction and porcelain repair nethod.the efficient and general treatment were compared.Results In the observation group,there were 12 cases cured,17 cases effective,2 cases ineffective,the total effective rate was 93.55％ (29/31) ; in the control group,there were 9 cases cured,14 cases effective,9 cases ineffctive,the total effective rate was 71.88％ (23/32).There were significantly difference between two groups (x2 =5.1323,P =0.0235).Tooth loose degrees,gingival condition and periodontal status and treatment of bone resorption rates of the observation group were 93.55％,93.55％,100.00％ and 96.77％,significantly higher than the control(71.88％,68.75％,71.88％,75.00％),the differences were statistically significant (all P ＜ 0.05).Crown retention between the two groups showed no significant difference between cases (P ＞ 0.05).Conclusion orthodontictraction has good effect in the treatment of former porcelain subgingival root pruning.

Traction of Horizontally Impacted Central Incisor: A Case Report.

Impactions of maxillary central incisors occur uncommonly. Treatment of such impactions is challenging, as they interfere with facial esthetics and other clinical problems. Early detection of such teeth is most important if complications are to be avoided. We report a case of 13 year old female patient with impacted maxillary central incisor located high in the vestibule, parallel to the occlusal plane at the level of adjacent teeth root tips, with rotated right central incisor and mesially tipped left lateral incisor towards midline with barely 4-5 mm space left between the right central incisor and the left lateral incisor. The impacted tooth was surgically exposed and traction was done with orthodontic intervention.

Impaction of the maxillary central incisor associated with supernumerary tooth: Surgical and orthodontic treatment.

Impaction of maxillary permanent incisor is not a frequently case in dental practice, but its treatment is challenging because of its importance to facial esthetics. Supernumerary teeth are the main cause of impaction of upper incisor. Supernumerary teeth when present can cause both esthetic and pathologic problems. Supernumerary teeth in the maxillary midline are common. Early detection of such teeth is most important if complications are to be avoided. We report a case of 12 year old male with an impacted supernumerary tooth in the maxillary anterior region, which was interfering with the eruption of the permanent, left central incisor. The impacted supernumerary tooth was surgically removed. With the application of an orthodontic traction, impacted left maxillary central incisor was brought down to its proper position in the dental arch.

Caninos superiores permanentes impactados: revisión de literatura y presentación de caso clínico / Impacted permanent maxillary canines: review of literature and presentation of clinical case

El proceso de desarrollo de los caninos permanentes superiores es entre todos los dientes el más demorado y de trayecto más largo. En el periodo de transición para la dentición permanente podrá ocurrir la no erupción de estos dientes. El diagnóstico precoz de esta anomalía es fundamental para el correcto desarrollo de la dentición y oclusión y para un tratamiento efectivo y rápido. Por lo tanto, el propósito de este trabajo fue revisar algunos aspectos concernientes a la etiología, diagnóstico y conduta clínica en casos de caninos superiores impactados

he canine development process is the most delayed process of all teeth and also the one that takes the longest path until its eruption. During the period of transition from the mixed denture to the permanent one it may occur some problems of dental impactions. Early diagnosis of this anomaly is of major importance to have a proper occlusion development and to have a more efficient and short treatment. Therefore, it was purpose with this study, to review some aspects concerning to the etiology diagnosis and clinical conduct of canines maxillary impactions

Evaluación de la resistencia a la tracción de tres dispositivos ortodóncicos instalados con resina autopolimerizable en premolares: un estudio in vitro / Evaluation of the tensile strength of three orthodontic devices installed with self-curing resin in premolars: an in vitro study

Las tracciones orto-quirúrgicos son técnicas ampliamente utilizadas en odontología para la reposición en oclusión de dientes que incluidos. Nuestro objetivo fue evaluar la resistencia a la tracción de tres tipos de dispositivos de tracción. En este estudio in vitro fueron utilizados 45 premolares sanos, conservados inicialmente en suero fisiológico al 0,9%; fueron divididos en tres grupos, de los cuales 15 recibieron la instalación de brackets, 15 recibieron botones ortodóncicos y 15 recibieron la instalación de mallas. La adhesión fue realizada con resina de autocurado y en todos ellos se instaló un alambre ortodóncico de 0,30mm; los dientes fueron fijados con resina acrílica y almacenados en suero fisiológico al 0,9% por 72 horas. A continuación fueron sometidos a test de tracción mecánica, con una tracción máxima de 50N, siendo analizados con del programa Logger Pro®. Los brackets demostraron mayor resistencia a la tracción (44,6N), seguidos por los botones y finalmente por las mallas (32N). La principal área de falla fue la interface dispositivo/resina, siendo las mallas las que presentaron el mayor índice de fracaso (66%). Ningún alambre presentó ruptura en los análisis ejecutados. Las mallas presentan los resultados mecánicos más pobres cuando son comparados con botones y brackets; el área de ruptura más frecuente corresponde a la interface dispositivo/resina

Ortho-surgical tractions are techniques very used in dentistry for the reposition in occlusion of embedded teeth. The aim of this research was to evaluated the resistance to traction of three kind of devices used in a traction technique. In this in vitro research was used 45 bicuspid, initially maintained in saline solution (0,9%); were formed three groups, where 15 received brackets, 15 received button and 15 received mesh. The adhesion was do it with self-curing resin and in all of them was installed an orthodontics wire of 0,30 mm; the teeth was fixed with acrylic resin and maintained in saline solution (0,9%) for 72 hours. Follow that, the samples were submitted to mechanical traction test, with maximum traction of 50N, being analyzed with Logger Pro software. The brackets show more resistance to the traction (44,6N), follow that button and finally for mesh (32N). The principal areas of fracture was to device/resin interface, presented the mesh a more failure percentage (66%). Non wire presented fracture in the analyses. The mesh present poor results when compared to buttons and brackets; the more prevalent area failure was device/resin interface

Orthodontic traction of impacted tooth / 대한치과교정학회지

Tooth impact on may lead to malocclusion, root resorption, cyst or aberrant changes in adjacent teeth Clinical and radiographic examinations are used to locate the impaction, and appropriate treatment plans must be made to relocate the impacted tooth. When surgically exposing the impacted tooth, periodontal considerations to conserve maximum amount of soft and hard tissue are used Oral hygiene instructions are emphasized to maintain sound periodontal health. Securing enough space for .the impacted tooth and proper anchorage is important. Proper use of force and mechanics is crucial to prevent such complications as root resorption. Various patterns of orthodontic traction may be employed as situation permits. Most impaction cases can be managed with orthodontic traction to restore function and esthetics, provided that early detection and proper diagnosis and treatment planning are made.

Treatment of impacted tooth in dentigerous cyst by orthodontic management combined with surgical operation / 实用口腔医学杂志

Objective:To assess the efficiency of orthodontic management in the treatment of impacted tooth in dentigerous cyst.Methods:Nine cases of dentigerous cysts with impacted teeth were treated with fixed appliances, surgical exposure, scrape of cyst and orthodontic traction to assist eruption of impacted teeth.Results:After treatment the panoramic radiographs revealed that radiolucent lesion disappeared with full bone regeneration, and the lesion was replaced by normal bony density and structure. Roots of impacted teeth normally developed. Impacted teeth were orthodontically brought into their proper position with normal alignment, normal overjet and overbite. Normal occlusion was found in all the cases. Mean total active orthodontic treatment time was 21.25 months,varying from 14 to 36.Conclusion:Orthodontic management combined with surgical approach is effective in the treatment of impacted teeth in dentigerous cyst.