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1.
Am J Orthod Dentofacial Orthop ; 156(2): 275-282, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31375238

RESUMO

This case report describes the interdisciplinary treatment of an ectopic horizontally placed maxillary right central incisor with severe root dilaceration. The root was distally angulated and entrapped by the root of the maxillary right lateral incisor. The initial force system was aimed at an occlusal displacement and applied to the crown. During the second phase, a button was cemented onto the apex of the impacted tooth. A force from the apex to a temporary anchorage device in the palate moved the root toward the midline. Finally, a root canal and an apectomy were performed and the central incisor could be moved to its ideal position. The treatment generated a normal height of the alveolar bone and an ideal occlusion with a healthy periodontium.


Assuntos
Incisivo/cirurgia , Técnicas de Movimentação Dentária/métodos , Raiz Dentária/cirurgia , Dente Impactado/cirurgia , Dente Impactado/terapia , Fenômenos Biomecânicos , Criança , Tomografia Computadorizada de Feixe Cônico/métodos , Cavidade Pulpar , Feminino , Humanos , Processamento de Imagem Assistida por Computador/métodos , Imageamento Tridimensional , Má Oclusão de Angle Classe I/terapia , Maxila/anatomia & histologia , Maxila/diagnóstico por imagem , Maxila/cirurgia , Aparelhos Ortodônticos Fixos , Extrusão Ortodôntica/métodos , Planejamento de Assistência ao Paciente , Tratamento do Canal Radicular , Coroa do Dente , Dente Impactado/diagnóstico por imagem , Resultado do Tratamento
2.
BMJ Case Rep ; 12(7)2019 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-31324671

RESUMO

The major challenge in traumatic injuries is the management of subgingival fracture of anterior teeth. Forced orthodontic extrusion is a suitable approach for these teeth as it provides both a sound tissue margin for final restoration and creates a periodontal environment (biological width) which is easy for the patient to maintain. Restoration after orthodontic eruption may present a more conservative treatment choice in young patients compared with the prosthetic restoration after extraction. This paper reports a case of the fractured maxillary anterior tooth at the subgingival level that was managed by forced orthodontic extrusion after endodontic therapy followed by aesthetic rehabilitation, a much-forgotten technique not utilised routinely yet conservative and cost-effective.


Assuntos
Restauração Dentária Permanente/métodos , Incisivo/lesões , Extrusão Ortodôntica/métodos , Tratamento do Canal Radicular/métodos , Fraturas dos Dentes/terapia , Adolescente , Humanos , Incisivo/cirurgia , Masculino , Maxila , Equipe de Assistência ao Paciente
3.
Am J Orthod Dentofacial Orthop ; 155(3): 421-431, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30826045

RESUMO

Short root anomaly (SRA) is a rare familial dental condition that is often misdiagnosed. Orthodontic treatment of patients with SRA is challenging because it is difficult to diagnose, it may be accompanied by other dental anomalies, and it has been reported to contribute to additional susceptibility to root resorption during orthodontic treatment. In this article, we describe a methodical and evidence-based means of diagnosing and orthodontically managing a patient with SRA. The patient had additional challenges, including impacted and ectopic teeth. An individualized treatment plan that incorporated efficient and effective mechanics led to a well seated occlusion and an esthetic smile.


Assuntos
Extrusão Ortodôntica/métodos , Ortodontia Corretiva/métodos , Erupção Ectópica de Dente/diagnóstico por imagem , Erupção Ectópica de Dente/terapia , Raiz Dentária/anormalidades , Raiz Dentária/diagnóstico por imagem , Dente Impactado/terapia , Adolescente , Cefalometria , Tomografia Computadorizada de Feixe Cônico , Estética Dentária , Feminino , Humanos , Radiografia Panorâmica , Sorriso , Dente Impactado/diagnóstico por imagem
4.
Compend Contin Educ Dent ; 40(1): 50-54, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30601022

RESUMO

The use of orthodontic extrusion can be advantageous for creating a favorable periodontal and restorative environment while avoiding extensive bone and soft-tissue grafting. This approach is demonstrated in the case of a young woman who presented with discomfort and concerns over her maxillary central incisors. Additionally, the orthodontic treatment corrected occlusal dysfunction and slight crowding. Interdisciplinary, facially generated treatment planning was critical to the final esthetic result and the reduction of biomechanical, functional, and dentofacial risk factors.


Assuntos
Estética Dentária , Extrusão Ortodôntica/métodos , Feminino , Humanos , Adulto Jovem
5.
Full dent. sci ; 10(40): 52-60, 2019. ilus
Artigo em Português | BBO - Odontologia | ID: biblio-1050353

RESUMO

A remoção de um elemento dentário resulta em reabsorção óssea alveolar como consequência do processo natural de reparação, sobretudo, em região anterior. Essa reabsorção pode limitar ou até comprometer a reabilitação estética e funcional do dente perdido. Diante da previsibilidade das mudanças ocorridas no pós-extração, tem-se considerado cada vez mais a modalidade de reabilitação no mesmo instante da remoção do dente comprometido. Em casos específicos de recessão gengival e perda óssea vestibular, na presença de raiz remanescente, a Ortodontia exerce papel fundamental na adequação dos tecidos da região acometida, pois possibilita alterar a posição do osso alveolar e margem gengival, aumentando o potencial estético do caso. O objetivo desse trabalho foi demonstrar as etapas clínicas de um caso de extrusão ortodôntica lenta com o objetivo de neoformação óssea na região apical e reposicionamento coronal dos tecidos ósseo e gengival para instalação de implante imediatamente após a extração, seguido da colocação de coroa provisória imediata (AU).


Removal of a dental element results in alveolar bone resorption as a consequence of the natural repair process, especially in anterior region. This resorption may limit or even compromise the aesthetic and functional rehabilitation of the lost tooth. In view of the predictability of changes in post-extraction, the rehabilitation modality has been increasingly considered at the same time as the removal of the involved tooth. In specific cases of gingival recession and vestibular bone loss, in the presence of remaining root, orthodontics plays a fundamental role in the adequacy of the tissues of the affected region, since it allows altering the position of the alveolar bone and gingival margin, increasing the aesthetic potential of the case. The objective of this study was to demonstrate the clinical stages of a slow orthodontic extrusion with the objective of bone neoformation in the apical region and coronal repositioning of the bone and gingival tissues to implant the implant immediately after the extraction, followed by the placement of an immediate provisional crown (AU).


Assuntos
Humanos , Masculino , Adulto , Coroa do Dente , Implantação Dentária , Extrusão Ortodôntica/métodos , Retração Gengival , Reabilitação Bucal , Brasil , Radiografia Dentária/instrumentação , Tomografia Computadorizada por Raios X/instrumentação
6.
Am J Orthod Dentofacial Orthop ; 154(4): 570-582, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-30268267

RESUMO

This case report shows the treatment of a severe traumatic tooth injury. For the maxillary right central incisor, the trauma was considered a complicated crown-root fracture. The level of the fracture line, the length of the remaining root segment, and the presence and condition of the tooth fragment determined the type of therapy. Traumatized teeth with fractures below the alveolar crest are often considered hopeless. As this report shows, the treatment of a complicated crown-root fracture in the esthetic region can be challenging. Orthodontic extrusion and crown-length surgery were performed to bring the fracture line above the alveolar bone crest. A multidisciplinary approach was required for complete rehabilitation of the traumatized maxillary incisor. Suggestions are made to improve treatment planning of complicated crown-root fractures.


Assuntos
Incisivo/lesões , Incisivo/cirurgia , Maxila/cirurgia , Extrusão Ortodôntica/métodos , Fraturas dos Dentes/cirurgia , Fraturas dos Dentes/terapia , Raiz Dentária/lesões , Raiz Dentária/cirurgia , Adulto , Processo Alveolar/lesões , Processo Alveolar/cirurgia , Cerâmica , Tomografia Computadorizada de Feixe Cônico , Porcelana Dentária , Restauração Dentária Permanente , Restauração Dentária Temporária , Facetas Dentárias , Estética Dentária , Feminino , Humanos , Incisivo/diagnóstico por imagem , Técnica para Retentor Intrarradicular , Pulpotomia , Tratamento do Canal Radicular , Coroa do Dente/diagnóstico por imagem , Coroa do Dente/lesões , Coroa do Dente/cirurgia , Fraturas dos Dentes/diagnóstico por imagem , Raiz Dentária/diagnóstico por imagem , Resultado do Tratamento
7.
Dent Traumatol ; 34(6): 455-463, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30207629

RESUMO

BACKGROUND/AIMS: The number of fractured anterior teeth following trauma has been increasing while not every patient is able to afford a dental implant instead of maintaining the injured tooth. Thus, a tooth conservation solution is required to place an aesthetic and functional restoration without biologic width violation. The aim of this study was to evaluate the effectiveness of minimally traumatic controlled surgical extrusion in fractured anterior teeth crown lengthening by assessing the periodontal status through clinical examination and radiographs. METHODS: This longitudinal observational study investigated a group of 18 patients (six males and 12 females) at the Department of Periodontology, National Hospital of Odonto-stomatology, Ho Chi Minh City, Vietnam. Following pre-surgery procedures and examination, minimally traumatic controlled surgical extrusion was carried out using a periotome. Patients were examined at four follow-up appointments after 1 week, 1, 3 and 6 months to record the following experimental variables: periodontal parameters including the gingival index (GI), pocket depth (PD), bleeding on probing (BOP), mobility, marginal gingiva position, alveolar ridge resorption, periapical osteogenesis, tooth resorption and ankylosis. RESULTS: All periodontal parameters were significantly decreased at 3 and 6 months post-procedure (P < 0.001). Tooth mobility decreased gradually following surgery, and at 6 months, all teeth became normal at level 0. Periapical osteogenesis changes were significantly increased at 1, 3 and 6 months in comparison with pre-surgery (P < 0.001). Marginal gingiva position and alveolar ridge resorption were not significantly different between pre-surgery and 1, 3 and 6 months post-surgery. No cases of root resorption or ankylosis were observed at 6 months post-surgery. CONCLUSION: A minimally traumatic controlled surgical extrusion technique for clinical crown lengthening yielded highly successful results in both aesthetic and functional aspects, and no cases had unfavourable outcomes during the 6-month follow-up period.


Assuntos
Aumento da Coroa Clínica/métodos , Extrusão Ortodôntica/métodos , Coroa do Dente/lesões , Fraturas dos Dentes/cirurgia , Adulto , Feminino , Humanos , Estudos Longitudinais , Masculino , Índice Periodontal , Complicações Pós-Operatórias , Resultado do Tratamento
8.
J Prosthet Dent ; 120(6): 879-885, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29960724

RESUMO

STATEMENT OF PROBLEM: Clinical studies evaluating the feasibility of a novel technique for the surgical extrusion of nonrestorable teeth with subgingival caries are lacking. PURPOSE: The purpose of this clinical study was to investigate the success rate and incidence of biological and technical complications after tooth extrusion with an atraumatic extraction system (AES). MATERIAL AND METHODS: Participants were recruited from 61 consecutive patients initially referred to a specialist oral surgery practice. Fifty-one participants who underwent surgical extrusion with an AES followed by endodontic treatment and coronal restoration could be re-evaluated clinically and radiographically. RESULTS: The mean observation period was 3.1 years (range: 0.8 to 6.5 years). The participants varied in age between 24.8 and 86.3 years. The amount of extrusion was between 2.5 and 5.0 mm (mean 3.2 mm). At recall, 92.2% (47 of 51) of the extruded teeth were considered successful. All extruded teeth were asymptomatic, without clinical signs of inflammation. Percussion appeared normal and did not differ from that of the adjacent teeth, indicating absence of ankylosis. Transient resorption with a slightly altered root contour was detected in 5 of the 51 teeth. Minor reduction of the bone level (less than 10%) was detected in 8 of the 51. In a further 2 teeth, bone loss amounted to 25% and 30%. Periapical periodontitis at recall was seen in 4 of the 51 teeth, and a preexisting periapical lesion healed in 10 of 13. Root perforation was identified in 3 of the 51, and a further 3 of 11 were not available for recall. Thus, the technical complication rate was 9.7% (6 of 62). CONCLUSIONS: The AES may be successfully used for surgical extrusion to save apparently nonrestorable teeth, irrespective of patient age.


Assuntos
Extrusão Ortodôntica/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Tratamento do Canal Radicular , Extração Dentária , Resultado do Tratamento
9.
J Oral Sci ; 60(4): 552-556, 2018 Dec 27.
Artigo em Inglês | MEDLINE | ID: mdl-29984786

RESUMO

This study investigated differences in periodontal health variables between buccally impacted maxillary canines (BIMC) and palatally impacted maxillary canines (PIMC) after surgical-orthodontic treatment with open technique. Nineteen patients were enrolled: 10 with unilateral BIMC (5 men, 5 women; mean age 18.50 ± 1.96 years) and 9 with unilateral PIMC (4 men, 5 women; mean age 19.44 ± 2.40 years). Probing depth and keratinized tissue were recorded 12 months after surgical-orthodontic treatment, and the differences between the 2 sides were analyzed as primary outcomes. In addition, data for BIMC and PIMC were directly compared. In the BIMC group, probing depths were significantly higher for lateral incisors than for the untreated side (P = 0.044), and keratinized tissue values were significantly lower for canines than for the untreated side (P = 0.006). No significant differences were observed in the PIMC group. In BIMC, surgical-orthodontic treatment with open technique resulted in loss of periodontal keratinized tissue in the treated tooth and periodontal attachment loss in adjacent lateral incisors. However, the periodontal status of PIMC was not affected by surgical-orthodontic treatment with open technique.


Assuntos
Dente Canino , Procedimentos Cirúrgicos Bucais/métodos , Extrusão Ortodôntica/métodos , Ortodontia Interceptora , Perda da Inserção Periodontal/diagnóstico , Dente Impactado/terapia , Adolescente , Feminino , Humanos , Masculino , Maxila , Índice Periodontal , Estudos Prospectivos , Dente Impactado/diagnóstico por imagem , Resultado do Tratamento , Adulto Jovem
11.
Am J Orthod Dentofacial Orthop ; 154(1): 55-64, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29957320

RESUMO

INTRODUCTION: Orthodontic extrusion of impacted maxillary canines requires careful biomechanical planning and the use of physiologic force. The aim of this study was to evaluate the time needed for orthodontic extrusion of impactions of different severities, using a device that can predictably apply forces under 0.6 N. METHODS: Twenty-two patients who were consecutively treated were selected retrospectively, and a total of 30 impacted canines were studied. Indexes of impaction were used to measure severity on pretreatment panoramic radiographs. Statistical analysis was used to detect interactions between treatment time, complexity of impaction, age, and sex. RESULTS: Treatment time was highly dependent on the patient's age; the shortest treatment time was observed in 11- to 12-year old patients. On the other hand, the severity of impaction had no effect on treatment time. CONCLUSIONS: Applying physiologic force with the proposed device resulted in a short treatment time, which depended on the patient's age more than the impaction complexity. Few complications were associated with use of this device. Future prospective studies are needed to replicate these findings and confirm the recommended use of this device.


Assuntos
Dente Canino , Extrusão Ortodôntica/instrumentação , Dente Impactado/terapia , Adolescente , Adulto , Criança , Estudos de Coortes , Desenho de Equipamento , Feminino , Humanos , Masculino , Maxila , Extrusão Ortodôntica/métodos , Estudos Retrospectivos , Fatores de Tempo , Resultado do Tratamento
12.
Int J Esthet Dent ; 13(2): 240-273, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29687103

RESUMO

The restoration of teeth that have been compromised by loss of crown and radicular structure due to caries, fractures, root resorption or iatrogenic lesions could result in the violation of the biologic width, with consequent gingival inflammation, loss of attachment, and alveolar bone loss. It is essential in these cases to obtain an adequate enough portion of the tooth structure to allow for a restoration that respects the biologic width. This can be achieved using a procedure that allows for the extrusion of the root in a single step, thereby shifting the compromised site from subgingival to supragingival. This allows adequate space to reestablish the biologic width while simplifying and speeding up the restorative procedures. The combination of this fast and reliable procedure with modern tooth preparation, current adhesive techniques, and the latest generation of restorative materials aligns perfectly with the philosophy of minimally invasive procedures, with undeniable advantages for patients.


Assuntos
Estética Dentária , Extrusão Ortodôntica/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Bucais/métodos
13.
Int Orthod ; 16(2): 217-245, 2018 06.
Artigo em Inglês | MEDLINE | ID: mdl-29661677

RESUMO

Orthodontics is a periodontal treatment. "Guided orthodontic regeneration" (GOR) procedures use orthodontic movements in perio-restorative patients. The GOR technique includes a guided orthodontic "soft tissue" regeneration (GOTR) and a guided orthodontic "bone" regeneration (GOBR) with a plastic soft tissue approach and a regenerating reality. The increased amount of soft tissue gained with orthodontic movement can be used for subsequent periodontal regenerative techniques. The increased amount of bone can as well improve primary implant stability and, eventually, simplify a GTR technique to regenerate soft tissues, to restore tooth with external resorption in aesthetic zone or to extract a tooth to create new hard-soft tissue for adjacent teeth.


Assuntos
Regeneração Óssea , Regeneração Tecidual Guiada/métodos , Má Oclusão/terapia , Extrusão Ortodôntica/métodos , Adulto , Aumento do Rebordo Alveolar , Implantação Dentária Endo-Óssea , Implantes Dentários , Implantes Dentários para Um Único Dente , Facetas Dentárias , Estética Dentária , Feminino , Humanos , Incisivo/diagnóstico por imagem , Incisivo/cirurgia , Masculino , Má Oclusão/complicações , Procedimentos de Ancoragem Ortodôntica/instrumentação , Procedimentos de Ancoragem Ortodôntica/métodos , Aparelhos Ortodônticos , Doenças Periodontais/terapia , Extração Dentária , Técnicas de Movimentação Dentária/métodos , Resultado do Tratamento
14.
Head Face Med ; 14(1): 5, 2018 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-29544499

RESUMO

BACKGROUND: Primary failure of eruption (PFE) is a rare disease defined as incomplete tooth eruption despite the presence of a clear eruption pathway. Orthodontic extrusion is not feasible in this case because it results in ankylosis of teeth. To the best of our knowledge, besides the study of Ahmad et al. (Eur J Orthod 28:535-540, 2006), no study has systematically analysed the clinical features of and factors associated with PFE. Therefore, the aim of this study was to systematically evaluate the current literature (from 2006 to 2017) for new insights and developments on the aetiology, diagnosis, genetics, and treatment options of PFE. METHODS: Following the PRISMA guidelines, a systematic search was performed using the PubMed/Medline database for studies reporting on PFE. The following terms were used: "primary failure of tooth eruption", "primary failure of eruption", "tooth eruption failure", and "PFE". RESULTS: Overall, 17 articles reporting clinical data of 314 patients were identified. In all patients, the molars were affected. In 81 reported cases, both the molars and the premolars were affected by PFE. Further, 38 patients' primary teeth were also affected. In 27 patients, no family members were affected. Additional dental anomalies were observed in 39 patients. A total of 51 different variants of the PTH1R gene associated with PFE were recorded. CONCLUSIONS: Infraocclusion of the posterior teeth, especially if both sides are affected, is the hallmark of PFE. If a patient is affected by PFE, all teeth distal to the most mesial tooth are also affected by PFE. Primary teeth can also be impacted; however, this may not necessarily occur. If a patient is suspected of having PFE, a genetic test for mutation in the PTH1R gene should be recommended prior to any orthodontic treatment to avoid ankylosis. Treatment options depend on the patient's age and the clinical situation, and they must be evaluated individually.


Assuntos
Extrusão Ortodôntica/métodos , Anquilose Dental/complicações , Erupção Dentária/fisiologia , Dente Decíduo , Dente não Erupcionado/diagnóstico , Fatores Etários , Dente Pré-Molar/cirurgia , Pré-Escolar , Feminino , Seguimentos , Humanos , Lactente , Masculino , Dente Molar/cirurgia , Radiografia Panorâmica/métodos , Fatores Sexuais , Dente não Erupcionado/epidemiologia
15.
Am J Orthod Dentofacial Orthop ; 153(2): 195-203, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29407496

RESUMO

INTRODUCTION: Orthodontic treatment of palatally impacted maxillary canines raises many difficulties; to minimize complications, careful planning of orthodontic extrusion and the use of physiologic force are crucial. The aim of this study was to quantitatively evaluate a simple and reproducible system for orthodontic extrusion of impacted canines that can provide the correct amount of force. METHODS: Ten specimens were constructed, consisting of a cantilever made with a 0.6-mm or 0.7-mm stainless steel wire modeled around a transpalatal bar with 3, 5, or 7 loops in the shape of a helical torsion spring. A mechanical testing machine was used to measure the force produced by the cantilever at 3, 6, 9, 12, and 15 mm of activation. RESULTS: The force values ranged from 1.24 ± 0.13 N for the 0.7-mm wire with 3 loops to 0.48 ± 0.04 N for the 0.6-mm wire with 7 loops. The forces measured for the 0.6-mm wire with 3 loops and the 0.7-mm wire with 7 loops were similar at 15 mm of deflection. CONCLUSIONS: The proposed system has a simple and robust design, is easy to construct and manage, and can provide the desired amount of force by changing the wire diameter and number of loops.


Assuntos
Dente Canino/cirurgia , Extrusão Ortodôntica/métodos , Dente Impactado/cirurgia , Análise do Estresse Dentário , Humanos , Maxila , Extrusão Ortodôntica/instrumentação , Fios Ortodônticos
16.
Compend Contin Educ Dent ; 38(7): 447-455; quiz 456, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28727462

RESUMO

As the use of dental implants has become more common, so has the frequency of complications and unforeseen outcomes. This article describes the treatment of a complex iatrogenic defect secondary to a failed implant (No. 7) and multiple bone-grafting attempts in the maxillary anterior region. The patient's revealing smile line and high-risk circumstances demanded the use of an interdisciplinary treatment approach with high potential for predictable esthetic results. Forced eruption was performed to restore the alveolar height deficit and develop the compromised hard and soft tissues around teeth Nos. 6 and 8. The subperiosteal minimally invasive (a)esthetic ridge-augmentation technique (SMART) was subsequently used to provide horizontal bone augmentation while preserving the soft-tissue architecture. After bone-graft integration, immediate postextraction implants were placed at Nos. 6 and 8 using a flapless approach, and a screwretained long-term polymethylmethacrylate provisional prosthesis was delivered during the same appointment. The synergy of these combined therapies resulted in a complete tridimensional reconstruction of the defect. Gingival and alveolar volumes and gingival margin levels were successfully restored.


Assuntos
Aumento do Rebordo Alveolar/métodos , Transplante Ósseo/métodos , Implantação Dentária Endo-Óssea/efeitos adversos , Implantes Dentários para Um Único Dente , Extrusão Ortodôntica/métodos , Implantação Dentária Endo-Óssea/métodos , Falha de Restauração Dentária , Feminino , Humanos , Doença Iatrogênica , Maxila/diagnóstico por imagem , Radiografia Dentária , Adulto Jovem
17.
Shanghai Kou Qiang Yi Xue ; 26(1): 115-117, 2017 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-28474081

RESUMO

PURPOSE: To evaluate the effect of one-couple orthodontic NiTi auxiliary arch on the premolar extrusion which had subgingival decayed defect. METHODS: A total of 30 cases with subgingival decayed defects over 2 mm under the proximal gingival margin were chosen including 18 first premolars and 12 second premolars. The first and second molars on the same side were connected steadily and the one-couple orthodontic force system was designed. The NiTi segmental arch was used to extrude the teeth. Student's t test was performed with SPSS 8.0 software package. RESULTS: All the defect margins were 1mm over the gingival margins and the extrusion distance was 2.6~4.1 mm. After extrusion, the crown-root ratio was 1.24±0.30, the depth of the gingival sulcus was 1.87±0.28 mm. There was no significant difference before and after treatment in the angle between the axis of the extruded teeth and that of the first molar (P>0.05). The anchorage teeth kept almost the same relationship with the opposite. CONCLUSION: One-couple orthodontic NiTi auxiliary arch could extrude the premolars with subgingival decayed defects effectively and precisely. The designed force system had little effect on the anchorage teeth.


Assuntos
Dente Pré-Molar , Dente Molar , Extrusão Ortodôntica/métodos , Humanos , Coroa do Dente , Técnicas de Movimentação Dentária , Raiz Dentária
18.
Am J Orthod Dentofacial Orthop ; 151(6): 1159-1168, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28554461

RESUMO

This case report describes the successful traction of 2 severely impacted canines. The patient, a 7-year-old girl, had good general health, nasal breathing, crossbite of the lateral incisors and canines, and a Class I molar relationship. The panoramic radiograph showed that the permanent canines were positioned above the roots of the lateral incisors, with the right canine in an accentuated inclination. The cephalometric analysis showed a skeletal Class III malocclusion with a predominance of horizontal growth. The Haas appliance associated with maxillary protraction was used during the first stage of treatment for 14 months. The second stage included the extraction of the deciduous molars, distal movement of the permanent molars to create space, and traction of the canines, and was associated with complete orthodontic treatment. The patient showed good esthetic and functional results at the end of treatment, verified by the stability over a period of 8 years after retention.


Assuntos
Dente Canino , Má Oclusão de Angle Classe III/terapia , Má Oclusão/terapia , Extrusão Ortodôntica/métodos , Ortodontia Corretiva/métodos , Dente Impactado/terapia , Cefalometria , Criança , Feminino , Humanos , Radiografia Panorâmica , Tração
20.
J Appl Oral Sci ; 25(1): 75-81, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28198979

RESUMO

Objective: The aim of this retrospective study was to evaluate the long-term effects of orthodontic traction on root length and alveolar bone level in impacted canines and adjacent teeth. Material and Methods: Sample consisted of 16 patients (nine males and seven females), mean initial age 11 years and 8 months presenting with unilaterally maxillary impacted canines, palatally displaced, treated with the same surgical and orthodontic approach. Teeth from the impacted-canine side were assigned as Group I (GI), and contralateral teeth as control, Group II (GII). The mean age of patients at the end of orthodontic treatment was 14 years and 2 months and the mean post-treatment time was 5 years and 11 months. Both contralateral erupted maxillary canines and adjacent teeth served as control. Root length and alveolar bone level (buccal and palatal) were evaluated on cone-beam computed tomography (CBCT) images. The comparison of root length and alveolar bone level changes between groups were assessed by applying paired t-test, at a significance level of 5% (p<0.05). Results: There were no statistically significant differences in root length and buccal and palatal bone levels of canines and adjacent teeth among groups. Conclusions: Impacted canine treatment by closed-eruption technique associated with canine crown perforation, has a minimal effect on root length and buccal and palatal alveolar bone level in both canine and adjacent teeth, demonstrating that this treatment protocol has a good long-term prognosis.


Assuntos
Processo Alveolar/patologia , Dente Canino/patologia , Extrusão Ortodôntica/efeitos adversos , Técnicas de Movimentação Dentária/efeitos adversos , Raiz Dentária/patologia , Dente Impactado/terapia , Perda do Osso Alveolar/etiologia , Processo Alveolar/diagnóstico por imagem , Criança , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Feminino , Humanos , Masculino , Extrusão Ortodôntica/métodos , Reprodutibilidade dos Testes , Estudos Retrospectivos , Fatores de Risco , Reabsorção da Raiz/etiologia , Estatísticas não Paramétricas , Fatores de Tempo , Erupção Ectópica de Dente/etiologia , Técnicas de Movimentação Dentária/métodos , Raiz Dentária/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem , Resultado do Tratamento
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