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1.
Bull Tokyo Dent Coll ; 61(4): 255-264, 2020 Dec 16.
Artigo em Inglês | MEDLINE | ID: mdl-33177271

RESUMO

This case report describes the unusual choice of extraction of maxillary incisors with short roots as part of an orthodontic treatment plan. The patient was a 20-year-old woman referred to our department in whom the diagnosis was maxillary protrusion and open bite. Both of the maxillary central incisors had short roots. Two treatment options were considered. The first involved extraction of the 4 first premolars with the aim of improving dentoalveolar protrusion and crowding. If preservation of the central incisors subsequently became difficult due to root resorption, prosthetic options were to be considered. The second treatment option involved extraction of the maxillary central incisors with short roots and the mandibular first premolars. The second treatment option was selected as survival of the central incisors following orthodontic movement was uncertain and the patient also wanted to minimize the risk of future extractions and the use of prosthetics. Active treatment was performed over a span of 31 months, and circumferential type retainers were used on both arches for retention. For such treatment to be successful, careful diagnosis and orthodontic treatment planning must be taken to ensure the anterior dental esthetics are properly restored.


Assuntos
Má Oclusão , Mordida Aberta , Reabsorção da Raiz , Adulto , Feminino , Humanos , Incisivo , Maxila , Mordida Aberta/terapia , Técnicas de Movimentação Dentária , Adulto Jovem
2.
Bull Tokyo Dent Coll ; 61(2): 95-102, 2020 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-32522933

RESUMO

The aim of this study was to investigate the condition of the maxillary lateral incisors and evaluate the methods used for cleft closure in patients with cleft lip and palate, including the treatment of the maxillary lateral incisors. A total of 214 patients (260 clefts) with alveolar clefts who had started Phase II treatment and entered the maintenance period at the Department of Orthodontics at Tokyo Dental College, Chiba Hospital, between 1975 and 2014 were included. Panoramic, intraoral, and occlusal radiographs, as well as intraoral photographs and medical records, were used to investigate cleft classification, the presence or absence and location of maxillary lateral incisors, and frequency and treatment method for peg lateral incisors in the cleft region. There were more unilateral cleft cases (78.5%) than bilateral cleft cases. The prevalence of congenital absence of the maxillary lateral incisors was similar between unilateral (53.0%) and bilateral cases (53.3%). Peg laterals occurred frequently, with 89.9% occurring in unilateral cases. The maxillary lateral incisors were more commonly found in the secondary than in the primary palate. The number of non-extraction cases was larger than that of extraction cases, regardless of cleft type or the location of the peg laterals. In many cases, the peg laterals were treated with non-extraction and space closure or crown modification. These results suggest that, depending on their condition, the peg laterals should be preserved as much as possible in devising a treatment plan.


Assuntos
Fenda Labial , Humanos , Incisivo , Maxila , Estudos Retrospectivos , Inquéritos e Questionários , Tóquio
3.
Prog Orthod ; 20(1): 24, 2019 Jun 18.
Artigo em Inglês | MEDLINE | ID: mdl-31209589

RESUMO

BACKGROUND: The purpose of this study was to evaluate the treatment effectiveness of Carriere Distalizer in comparison to Class II intermaxillary elastics and Forsus. METHODS: Three groups of patients treated with Class II intermaxillary elastics (n = 18), Carriere Distalizer (n = 18), and Forsus appliance (n = 18) were collected from three private orthodontic practices. Inclusion criteria were as follows: (1) 10-14 years old of start age with permanent dentition, (2) no history of previous orthodontic treatment, (3) complete pre- and post-treatment records, (4) dental Class II division 1 (end-to-end or more), (5) no pre-treatment transverse discrepancy, (6) non-extraction treatment plan, and (7) Class I post-treatment occlusal relationship. The data consisted of cephalometric and study model measurements from pre- and post-treatment records and treatment time. Two-tail Student t test was used to analyze the differences in cephalometric changes and dental corrections between Carriere Distalizer group and Class II elastics/Forsus group. RESULTS: All three groups of patients showed no differences in the age of treatment initiation, pre-treatment cephalometric measurements and discrepancy index (DI). The time of Class II correction for Carriere Distalizer was significantly shorter than that for Class II elastics; there was no difference in the length of Class II correction between Carriere Distalizer and Forsus groups. The amount of Class II correction (canine/molar relationship) was significantly lower for Carriere Distalizer when compared with Forsus appliance. Carriere Distalizer, similarly to Class II elastics, did not induce any statistically significant correction in skeletal component (ANB and Wits appraisal). CONCLUSIONS: There is no clinically significant skeletal correction induced by Carriere Distalizer in growing patients. Carriere Distalizer can be applied to treatment of mild to moderate Class II dental malocclusion over 6 months on average, although the total treatment time may be prolonged due to various side effects. Overall, the Carriere Distalizer appears to be no more effective or efficient than alternatives in the treatment of Class II malocclusion.


Assuntos
Má Oclusão Classe II de Angle , Aparelhos Ortodônticos Funcionais , Sobremordida , Adolescente , Cefalometria , Criança , Humanos , Resultado do Tratamento
4.
Bull Tokyo Dent Coll ; 57(3): 159-68, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27665693

RESUMO

The present study targeted patients with unilateral cleft lip and palate (UCLP) undergoing either one - (Wardill technique) or two-stage palatoplasty (Perko technique). Correlations between Goslon Yardstick scores and orthodontic appliances used and whether an osteotomy was performed were investigated. No differences were observed between the two types of palatoplasty in terms of Goslon Yardstick scores. A palatal expander and protraction facemask were used in Phase I of orthodontic treatment. The palatal expander was selected for most patients with UCLP in Phase I, regardless of the surgical technique used. A protraction facemask was used in patients undergoing the Wardill procedure who had a Goslon Yardstick score placing them in Group 3 or 4. In contrast, a protraction facemask was used in patients undergoing the Perko procedure who had a Goslon Yardstick score placing them in Group 4. No significant differences were observed in the Goslon Yardstick scores yielded by either type of procedure. The Goslon Yardstick score in relation to whether an osteotomy was performed in Phase II as part of orthodontic treatment was determined, focusing on the relationship between that score and the palatoplasty method used. A protraction facemask was used in patients undergoing the Perko procedure, which eliminated the need for an osteotomy at a future date. However, a protraction facemask was also used in patients undergoing the Wardill option, and those patients were likely to require an osteotomy. In other words, the results suggest that the type of palatoplasty selected will determine the effectiveness of any orthodontic appliances used.


Assuntos
Fissura Palatina/cirurgia , Má Oclusão/patologia , Má Oclusão/terapia , Procedimentos Cirúrgicos Bucais/métodos , Procedimentos Cirúrgicos Bucais/estatística & dados numéricos , Ortodontia Corretiva/métodos , Ortodontia Corretiva/estatística & dados numéricos , Criança , Pesquisa Comparativa da Efetividade , Arco Dental/anormalidades , Aparelhos de Tração Extrabucal/estatística & dados numéricos , Feminino , Humanos , Masculino , Técnica de Expansão Palatina/instrumentação , Técnica de Expansão Palatina/estatística & dados numéricos , Tóquio , Resultado do Tratamento
5.
Arch Oral Biol ; 70: 158-164, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27371807

RESUMO

OBJECTIVE: This study investigated the expression of receptor activator of nuclear factor-κB ligand (RANKL) in periodontal ligament (PDL) cells co-cultured with dental pulp (DP) cells following mechanical stress in vitro. Furthermore, the expression of prostaglandin (PG) E2 and substance P (SP) by the PDL cells and by the DP cells were also examined. DESIGN: PDL and DP cells were obtained from 10 rats. The experimental group consisted of PDL cells subjected to centrifugal force as mechanical stress and co-cultured with DP cells. The 3 control groups of PDL cells were: 1) PDL cells without mechanical stress, 2) PDL cells treated with mechanical stress and 3) PDL cells co-cultured with DP cells. The 2 control groups of DP cells were: 1) DP cells without mechanical stress and 2) DP cells co-cultured with PDL cells. In each group, both cells were examined at day 1 and day 3, and mRNA levels of RANKL by PDL cells were analyzed using Real time quantitative Reverse Transcription (RT)-PCR. Furthermore, RANKL expression was observed using Immunofluorescence staining. PGE2 and SP expression levels by PDL cells and DP cells were characterized by ELISA analysis. RESULTS: The expression of RANKL by PDL cells under mechanical stress increased by co-culture with DP cells. PGE2 and SP expressions were increased in the group of PDL cells subjected to mechanical stress and co-cultured with DP cells. CONCLUSION: DP cells may facilitate the expression of RANKL in PDL cells under mechanical stress via PGE2 and SP.


Assuntos
Polpa Dentária/citologia , Polpa Dentária/metabolismo , Ligamento Periodontal/citologia , Ligamento Periodontal/metabolismo , Prostaglandinas/biossíntese , Ligante RANK/biossíntese , Substância P/biossíntese , Animais , Células Cultivadas , Técnicas de Cocultura , Citocinas/biossíntese , Citocinas/metabolismo , Polpa Dentária/diagnóstico por imagem , Ensaio de Imunoadsorção Enzimática , Células Epiteliais/metabolismo , Masculino , Microscopia Confocal , Ligante RANK/genética , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Reação em Cadeia da Polimerase em Tempo Real , Estresse Mecânico , Substância P/genética
6.
Bull Tokyo Dent Coll ; 57(4): 281-290, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28049976

RESUMO

Posterior open bite can cause problems with occlusion. It arises from systemic or local factors such as physical or functional interference, ankylosis, and failure of eruption. Primary failure of eruption (PFE) is a rare condition that is difficult to differentiate from ankylosis and requires complex treatment strategies. Here we report a 12-year-old girl who was referred to our hospital by her dentist for re-evaluation of eruption failure of the left maxillary secondary premolar and first and second molars with congenitally missing maxillary lateral teeth. The maxillary first molar was extracted for a therapeutic diagnosis. The left maxillary secondary premolar and second molar reacted well to subsequent orthodontic treatment. Auto-transplantation of the mandibular premolar to the maxil-lary arch was carried out to achieve optimal overjet, overbite, and occlusion. The active treatment period spanned 4 years and 1 month. Assessment of the patient's medical and dental history, prior trauma, and clinical conditions resulted in a therapeutic diagnosis of PFE. Satisfactory orthodontic treatment results were achieved.


Assuntos
Mordida Aberta/terapia , Dente não Erupcionado/terapia , Criança , Feminino , Humanos , Dente Molar/anormalidades , Extrusão Ortodôntica , Ortodontia Corretiva/métodos , Ortodontia Interceptora/métodos
7.
Bull Tokyo Dent Coll ; 51(3): 151-63, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20877162

RESUMO

The aim of this retrospective study was to determine factors that might cause complications in use of temporary anchorage devices (TADs) for orthodontic anchorage. We investigated 904 TADs in 455 patients. Clinical diagnoses requiring orthodontic treatment were malocclusion, jaw deformity, various syndromes, cleft lip and palate and impacted teeth. All patients underwent surgery at Tokyo Dental College Chiba Hospital between November 2000 and June 2009. Three kinds of titanium screw of different diameter and length were used: self-drilling mini-screws (Dual Top Autoscrew® and OSAS®), pre-drilling micro-screws (K1 system®) and palatal screws (PIAS®). Mini-plates fixed with 2 or 3 screws (SAS system®) were also used for skeletal anchorage. Patients were aged between 8 and 68 years (25.7±9.8 years). A total of 460 screw-type and 444 plate-type TADs were used. These comprised the following: mini-plates, 444; self-drilling mini-screws, 225; pre-drilling micro-screws, 83; and palatal screws, 152. Each type of implant had a high success rate of over about 90%. Failure rates were as follows: micro-screws, 7%; mini-screws, 6%; palatal implants, 11%; and mini-plates, 6%. Inflammation rate occurring in soft tissue surrounding TADs was follows: plate-type, 7.6%; mini-screws, 1.3%; micro-screws, 0%; and palatal implants, 2.5%. Inflammation frequencies depended on degree of mucosal penetration. Granulation rate in soft tissue surrounding TADs occurred as follows: micro-screws, 5.7%; self-drilling mini-screws, 0%; palatal screws, 0.6%; plate-type, 0.9%. Both plate- and screwtype orthodontic implants showed excellent clinical performance.


Assuntos
Procedimentos de Ancoragem Ortodôntica/instrumentação , Aparelhos Ortodônticos , Adolescente , Adulto , Idoso , Processo Alveolar/cirurgia , Placas Ósseas , Parafusos Ósseos , Criança , Falha de Equipamento , Feminino , Humanos , Inflamação/etiologia , Anormalidades Maxilomandibulares/terapia , Masculino , Má Oclusão/terapia , Pessoa de Meia-Idade , Miniaturização , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos/efeitos adversos , Palato Duro/cirurgia , Estudos Retrospectivos , Dente Impactado/terapia , Resultado do Tratamento , Adulto Jovem
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