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1.
Orthod Fr ; 91(4): 373-392, 2020 Dec 01.
Artigo em Francês | MEDLINE | ID: mdl-33372663

RESUMO

The first publication on the use of magnets in dentistry for stabilizing prosthetics on implants dates back to 1953. Clinical development in orthodontics, without having experienced a real boom, has increased over the past ten years, in parallel with the improvement of the device. The objective of this review of the literature is to synthesize clinical applications and reported iatrogenic effects. A systematic review of the international literature from the Pubmed and Cochrane databases from 1999 to July 2018 was conducted which resulted in 36 articles. The factors studied are the indications and contraindications, the means or procedure, as well as the iatrogenic effects. Original cases are presented. The correction of infraclusions is the main indication, followed by the correction of anteroposterior malocclusions and then the correction of over-erupted teeth. Traction of an impacted teeth and diastema closure have not been found in recent publications probably because of the low benefit-risk ratio. The future no longer seems to be buried magnets or left in the long term in the mouth considering there seems to be concerns in terms of toxicity (or even the risk in terms of vital prognosis). The magnets could offer interesting perspectives to manage the current limits of the aligners, the movements of anterior egression, rotation and previous torque being still problematic...


Assuntos
Má Oclusão , Ortodontia , Dente Impactado , Humanos , Imãs , Ortodontia Corretiva
2.
Orthod Fr ; 91(4): 347-360, 2020 Dec 01.
Artigo em Francês | MEDLINE | ID: mdl-33319769

RESUMO

According to several theories, the oro-facial sphere would be interconnected with the rest of the body justifying the requests for care to improve a body zone at a distance. The aim of this literature review was to look for potential distant links of dysmorphoses of the three dimensions of space according to the etiopathogenic theories and the data of science. We carried out a keyword search leading to 58 references. In the transverse dimension, the transverse maxillary hypoplasia and dissymmetry of the molar class of the transverse dimension would not induce a change in the distribution of the weight of the body on a stabilometric platform. In the vertical dimension, hyperdivergent patients have a decreased bite force, cephalic extension with respect to the spine, an extension of the base of the skull, and decreased cervical lordosis. In the anteroposterior dimension, skeletal classes II would be associated with increased cervical lordosis and posterior cephalic extension according to the « true vertical ¼ (inversely for classes III). The prevalence of dental classes II would be increased in scoliosis subjects. Studies with a low level of evidence (grade III, IV or even V) should be interpreted with caution because the simultaneous presence of concomitant anomalies does not allow us to conclude that there is a cause-and-effect relationship.


Assuntos
Lordose , Escoliose , Cefalometria , Humanos , Maxila , Postura , Dimensão Vertical
3.
Orthod Fr ; 91(3): 179-190, 2020 10 01.
Artigo em Francês | MEDLINE | ID: mdl-33146613

RESUMO

Once the orthodontic retention phase is complete, a number of patients return to the office following retainer detachment or complaining about the stability of the result. The aim of this study was to search for predictors of re-consultation and to evaluate how the choice of retainer impacts re-consultation for misalignment or debonding. A systematic retrospective cohort study was conducted ten years after removal of orthodontic appliances. Of the 380 patients included, 23% re-consulted on average 4.5 years after appliance removal. The patients most likely to re-consult were those with a severe initial aesthetic deficit. Mandibular retainers bonded on six teeth resulted in three-fold more re-consultations than wires bonded exclusively on the canines, but the difference was non-significant. Mandibular retainers bonded on the canines certainly generated significantly more maintenance appointments than the six-teeth retainers, but fewer malposition problems (non-significant result). These results raise questions regarding indications for bonded maxillary retainers as opposed to removable devices and also regarding the management of long-term post-retention follow-up.


Assuntos
Mandíbula , Contenções Ortodônticas , Humanos , Desenho de Aparelho Ortodôntico , Recidiva , Encaminhamento e Consulta , Estudos Retrospectivos
4.
Orthod Fr ; 91(3): 197-207, 2020 10 01.
Artigo em Francês | MEDLINE | ID: mdl-33146615

RESUMO

The objective of this comparative retrospective cohort performed on 202 patients was to evaluate the influence of instrumental extraction (forceps, suction cup, spatula) during delivery on the need for orthodontic treatment. Questionnaires on the type of delivery were distributed in three different structures. The need for treatment was assessed using the IOTN indicator (Index of Orthodontic Treatment Need). The groups were compared by statistical tests at the significance level of 5 %. 202 patients were included (51 in the group « instrumental delivery ¼, 151 in the control group). With an average IOTN of 3.3 in the « instrumental delivery ¼ group versus 2.5 in the « non-instrumental delivery ¼ group, the difference between the two groups is statistically significant (p = 0.00015). Since the need for orthodontic treatment is significantly higher in patients born by instrumental delivery compared to patients born without instrumental support, instrumental extraction is therefore a risk factor in orthodontics, diagnosis and orthodontic treatment may be indicated in these patients. In addition, provided that it is proven effective, early osteopathic management may be recommended.


Assuntos
Má Oclusão , Ortodontia , Assistência Odontológica , Humanos , Índice de Necessidade de Tratamento Ortodôntico , Má Oclusão/terapia , Ortodontia Corretiva , Estudos Retrospectivos
5.
Orthod Fr ; 91(3): 225-238, 2020 10 01.
Artigo em Francês | MEDLINE | ID: mdl-33146617

RESUMO

The treatment of mandibular asymmetry often requires a late surgical orthodontic protocol that certainly allows an improvement but no complete correction. Ideal would be to control the etiological factors which are still controversial. The aim of the study is to identify per and postnatal factors associated with the development of mandibular asymmetry. This case-control study was performed with a cohort of 100 individuals divided in two subgroups. A subgroup of 50 subjects with mandibular asymmetry and another subgroup of 50 subjects without mandibular asymmetry. The subjects included in the study had to be from 6 to 16 years old, have a complete orthodontic file and no congenital syndrom or pathology. The following factors have been assessed: gender, mode and date of birth, dental trauma, visual disorders, ENT problems and parafunctions. An inter-group comparison had been performed by using statistical tests (Chisquare test, Fisher test and odds ratios calculation). The associated factors with mandibular asymmetry are male gender, oral ventilation, short-term vaginal nasalization, dental trauma and visual disorders. Asthma (symmetrical character of the anomaly ?), prematurity and caesarean section (by absence of trauma at delivery ?) would not be considered as associated factors. This case-control study is a first-line study that allows the identification of factors that may be associated with mandibular asymmetry. Ideally, a larger-scale prospective cohort study to increase the pertinence would clarify the risk factors for the development of mandibular asymmetry.


Assuntos
Cesárea , Assimetria Facial , Adolescente , Estudos de Casos e Controles , Cefalometria , Criança , Assimetria Facial/epidemiologia , Assimetria Facial/etiologia , Feminino , Humanos , Masculino , Mandíbula , Gravidez , Estudos Prospectivos
6.
Int Orthod ; 17(3): 544-553, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31279754

RESUMO

INTRODUCTION: Although a "catch-up" growth occurs in early childhood, respiratory system immaturity and the use of oral and naso-gastric probes for prematurely born children are responsible for palatal and cranio-facial alterations. OBJECTIVE: To assess whether prematurity is a risk factor in orthodontics in terms of malocclusions, dysmorphoses and orthodontic treatment need compared to term-born children. To compare the differences of risk factors among these preterm birth subtypes according the severity. MATERIALS AND METHODS: Distributed questionnaires within an orthodontic practice and in the Department of Odontology, Lyon Hospital, France. The evaluation criteria were calculated from the casts, photographs and radiographies carried out during the initial assessment. A statistical intergroup comparison was performed. RESULTS: Of the 537 questionnaires obtained, 47 preterm patients and 150 term-born patients were included in our study. Preterm infants had significantly more bilateral crossed-occlusions than patients in the term group (P=0.003). In addition, very preterm and extremely preterm children had significantly more impacted tooth (P=0.049) and a higher Index of Orthodontic Treatment Need (IOTN grade 5, P=0.003) compared with term children. CONCLUSION: Very preterm and extremely preterm births (occurring more than 8 weeks before the term) represent a risk factor in orthodontics and, therefore, a public health problem.


Assuntos
Má Oclusão/epidemiologia , Ortodontia , Nascimento Prematuro , Adolescente , Cefalometria , Criança , Estudos Transversais , Feminino , Humanos , Recém-Nascido Prematuro , Masculino , Má Oclusão/classificação , Má Oclusão/terapia , Fatores de Risco , Inquéritos e Questionários
7.
Orthod Fr ; 90(2): 119-126, 2019 Jun.
Artigo em Francês | MEDLINE | ID: mdl-31241454

RESUMO

Objectives : The aim of this blind cross-sectional study is to evaluate the influence of a fixed orthodontic appliance on the cervical spine. MATERIALS AND METHODS:  Number and severity of somatic dysfunctions (i.e. alteration of the function of an element constituting the somatic system or SD) of the cervical spine have been searched on patients sorted out in three groups: subjects without orthodontic treatment (group 1), subjects wearing fixed orthodontic appliance (group 2) and subjects in a retention period after removal of the fixed orthodontic appliance (group 3) and were compared thanks to khi2 test. RESULTS:  A total of 145 patients from 6 to 17 years old was included. There are more SD in the second group (p = 0.006) than in the first group. There is no difference between the 1st and the 3rd group (p = 0.2), between the 2nd and the 3rd group (p = 0.4) and between the three groups (p = 0.6) concerning the severity of SD. CONCLUSION:  Cervical disorders should not be attributed to long-term multi-attachment treatment since once the active orthodontic treatment is finished, the SD are not significantly increased compared to the control group. These results may encourage to make a study to evaluate benefits of cervical osteopathic follow-up for patients at risk after the setting of the fixed appliance.


Assuntos
Aparelhos Ortodônticos , Adolescente , Criança , Estudos Transversais , Humanos
8.
Orthod Fr ; 90(1): 75-100, 2019 Mar.
Artigo em Francês | MEDLINE | ID: mdl-30994451

RESUMO

INTRODUCTION: The aim of this retrospective cohort is to evaluate the amount of postsurgical correction of soft and hard tissues in patients with mandibular asymmetries and to compare the results with and without surgery of the lower mandibular contour (chin wing…). MATERIAL AND METHOD: Mandibular asymmetries cases of three surgeons were systematically included. The angles of deviation of the chin, bi-commissural, bi-gonic and occlusal were measured on face photography and radiography. A pre and post-surgical comparison was performed and the amount of correction was analyzed via the Wilcoxon statistical test. RESULTS: 51 patients (44 women and 7 men) were included. After surgery, the correction is significant for all measurements with an improvement of 44 to 60% depending on the measured angles. No patient is normalized but the small initial mandibular asymmetries are the closest to normal after surgery. The correction of the bi-commissural angle is controlled without being optimal (60% correction). The difficulty remains the horizontalization of the bi-gonial plan which is only corrected at 45%. Patients with mandibular margin surgery (chin wing…) showed the greatest improvement in bi-gonial (p = 0.0142) and occlusal (p = 0.0154) angles. CONCLUSION: If surgery allows a significant correction of facial dissymmetry, this is not complete. Surgical procedures on the lower edge of the mandible such as the chin wing could provide a better correction especially for bi-gonial and occlusal angles.


Assuntos
Queixo/cirurgia , Assimetria Facial/cirurgia , Mentoplastia/métodos , Mandíbula/cirurgia , Procedimentos Cirúrgicos Ortognáticos/métodos , Adolescente , Adulto , Cefalometria , Estudos de Coortes , Feminino , Humanos , Masculino , Má Oclusão de Angle Classe III/cirurgia , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
9.
Orthod Fr ; 89(4): 355-363, 2018 12.
Artigo em Francês | MEDLINE | ID: mdl-30565554

RESUMO

INTRODUCTION: The diagnosis of scoliosis during orthodontic treatment is often attributed to orthodontic treatment, which may be a simple confounding factor. Do scoliotic patients require increased orthodontic treatment? Is the extent of their need for orthodontic treatment correlated with the severity of their scoliosis? MATERIAL AND METHOD: The authors conducted a comparative multicenter epidemiological study between a group of patients with a proven diagnosis of scoliosis objectified by the Cobb angle and a control group recruited from the general population. The endpoint was the Index Of Orthodontic Treatment Need (IOTN). The calculation of the number of subjects was made a priori. A statistical significance threshold of 5% was used for the statistical analysis. RESULTS: In this study, 104 patients were included: 36 patients (10 boys, 26 girls) with an average age of 12.1 years (+/-2.3 years) in the scoliosis group (mean Cobb angle = 21°) versus 69 patients (20 boys, 49 girls) with an average age of 12 years (+/-2.7 years) in the control group. Patients with scoliosis have a significantly higher need for orthodontic treatment than the general population. The study did not correlate the severity of scoliosis with the increased need for orthodontic treatment. DISCUSSION: Thus, the diagnosis of scoliosis during orthodontic treatment should not systematically result in the removal of the orthodontic appliance over-hastily held responsible for the scoliotic condition.


Assuntos
Necessidades e Demandas de Serviços de Saúde , Ortodontia , Escoliose/epidemiologia , Escoliose/terapia , Adolescente , Estudos de Casos e Controles , Criança , Feminino , França/epidemiologia , Necessidades e Demandas de Serviços de Saúde/estatística & dados numéricos , Necessidades e Demandas de Serviços de Saúde/tendências , Humanos , Masculino , Ortodontia/métodos , Ortodontia/estatística & dados numéricos , Ortodontia/tendências
10.
Orthod Fr ; 89(4): 371-386, 2018 12.
Artigo em Francês | MEDLINE | ID: mdl-30565556

RESUMO

INTRODUCTION: Discontinuation of orthodontic treatment has iatrogenic, psychological, ergonomic and financial consequences. The objective of this study was to investigate early risk factors (prior to installation) of discontinuation of orthodontic treatment. MATERIALS AND METHODS: We performed a case-control study between a group of patients who dropped their orthodontic treatment ("A") and a randomly selected group of patients who had completed their orthodontic treatment ("NA"). The two groups were compared, with descriptive, uni and multivariate analyzes. The risk factors assessed were age, gender, socioeconomic status, type of treatment, dysmorphism, malocclusion, need for treatment, compliance. RESULTS: In the dropout group 55 patients were included ("A") and 100 in the non-abandoned ("NA") group randomly selected. The subject at risk of abandonment was a girl of less than 11 years of age with a low socio-economic level with antero-posterior and vertical skeletal dysmorphisms, a molar class II, a teeth crowding, a small aesthetic prejudice or, on the contrary, very important, complex treatment (with extractions or with surgery) and having delays or missed appointments before the installation of the orthodontic appliance. CONCLUSION: Patients' motivation needs to be strengthened for both extremes: treatments that appear simple and conversely for complex cases requiring strong cooperation.


Assuntos
Má Oclusão/diagnóstico , Má Oclusão/terapia , Ortodontia Corretiva , Cooperação do Paciente , Recusa de Participação , Adolescente , Adulto , Estudos de Casos e Controles , Criança , Diagnóstico Precoce , Feminino , França/epidemiologia , Humanos , Masculino , Má Oclusão/epidemiologia , Pessoa de Meia-Idade , Ortodontia Corretiva/psicologia , Ortodontia Corretiva/estatística & dados numéricos , Cooperação do Paciente/psicologia , Cooperação do Paciente/estatística & dados numéricos , Prognóstico , Recusa de Participação/psicologia , Recusa de Participação/estatística & dados numéricos , Fatores de Risco , Fatores Socioeconômicos , Fatores de Tempo , Falha de Tratamento , Resultado do Tratamento , Adulto Jovem
11.
Orthod Fr ; 89(3): 259-277, 2018 09.
Artigo em Francês | MEDLINE | ID: mdl-30255842

RESUMO

INTRODUCTION: The purpose of this systematic literature review is to evaluate the benefit / risk ratio of mandibular symphyseal distraction osteogenesis. MATERIALS AND METHODS: Searches were made on Pubmed/Medline and Cochrane for randomized clinical trials and case series involving mandibular symphyseal distraction over the past 20 years with a patient sample greater than or equal to 10. RESULTS: Of the 92 articles, 25 met the inclusion criteria. A controlled trial was selected, but no randomized trial. The other studies were all case series, 16 retrospective and 8 prospective. Distractors with bone or hybrid anchorage appear to lead to more periodontal and infectious complications due to the buccal position of the jack. Most complications are benign. However, the most difficult event to deal with is distraction device fracture. Symphyseal midline distraction increases the transverse dimension efficiently, reliably and sustainably, and appears to have no demonstrated deleterious effects on the ATMs for the three types of distractors. DISCUSSION: Tooth-borne devices are recommended in most cases given their benefit / risk ratio. Furthermore, they do not require a second surgical procedure to remove them. CONCLUSION: Mandibular symphyseal distraction osteogenesis is a reliable therapy whose exact limits and reproducibility remain to be defined by future prospective studies.


Assuntos
Mandíbula/cirurgia , Osteogênese por Distração , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Medição de Risco
12.
Orthod Fr ; 89(3): 279-288, 2018 09.
Artigo em Francês | MEDLINE | ID: mdl-30255843

RESUMO

INTRODUCTION: The aim of this systematic literature review is to propose a clinical protocol in 2018 by comparing therapeutic efficacy and undesirable effects of the technique. MATERIALS AND METHODS: Searches were made on Pubmed/Medline and Cochrane for randomized clinical trials and case series involving mandibular symphyseal distraction over the past 20 years with a patient sample greater than or equal to 10. RESULTS: Of the 92 articles, 25 met the inclusion criteria. A controlled trial was selected, but no randomized trial. The other studies were all case series, 16 retrospective and 8 prospective. Dental crowding over 7 mm, with or without compensation, is an indication for mid-symphyseal distraction. Pre-surgical orthodontic treatment ensures root divergence between the mandibular incisors. Tooth-borne devices are recommended in first intention. Surgical intervention (ambulatory) under local anesthesia and intravenous sedation is considered. The latency period before activation of the jack is 6 days. Activations are performed by the orthodontist and subsequently by the patient at a rate of 1 mm per day, with four activations daily. Orthodontic movements are resumed two weeks after activations are discontinued. The distractor is removed within two to three months after installation. CONCLUSION: Although the main features of the mid-symphyseal distraction protocol were drawn up essentially in the light of expert opinion, they still need to be refined by controlled trials.


Assuntos
Mandíbula/cirurgia , Osteogênese por Distração/normas , Protocolos Clínicos , Árvores de Decisões , Humanos
13.
Orthod Fr ; 89(2): 157-168, 2018 06.
Artigo em Francês | MEDLINE | ID: mdl-30040615

RESUMO

OBJECTIVES: The objective of this literature review is to investigate whether the gender of patients and practitioners makes any difference to orthodontic treatment. MATERIALS AND METHODS: Sixty-nine articles were selected, the vast majority of which studied patient gender. RESULTS: Young females are the category of patients which most often apply for orthodontic treatment, probably because of their higher aesthetic demands, despite their objective needs being no greater. Aesthetic, skeletal and dental analyses reveal an obvious dimorphism with larger dimensions in males, especially for the nose, cheekbones, mouth and mandibular canines. Nevertheless, cephalometric angular values do not vary significantly between male and female individuals. Growth is quantitatively greater in males. It also occurs later, as does eruption and maturation of their teeth. Response to the different orthodontic / orthopedic therapies would appear not to differ according to the sex of the patient. DISCUSSION: These results, however, need to be qualified according to the country concerned, the patients' life style and mind frames, as these can modify or influence the studied parameters.


Assuntos
Má Oclusão/epidemiologia , Má Oclusão/terapia , Ortodontia Corretiva/estatística & dados numéricos , Feminino , Humanos , Masculino , Ortodontia Corretiva/métodos , Fatores Sexuais
14.
Orthod Fr ; 89(2): 199-212, 2018 06.
Artigo em Francês | MEDLINE | ID: mdl-30040619

RESUMO

INTRODUCTION: Clinical measurements in the frontal view underevaluate chin deviation in mandibular asymmetry. The aim of this descriptive study is to search for a reliable method of measuring deviant chins using a facial X-ray as reference. MATERIAL AND METHOD: Seventy patients with mandibular asymmetry who had consulted a maxillofacial surgeon were systematically included. Age, sex, cephalometric characteristics, reasons for patient consultation and type of surgery were collected. Two cephalometric methods were tested with respect to the medial sagittal plane (PSM) to compare the assessment of mandibular asymmetry on soft tissue and by cephalometry. RESULTS: On average, the patients selected were young (26 years +/- 9), women (75% of cases), presented open bite (average FMA: 28° +/- 8°), a skeletal class III tendency, a left-side shift of the chin (63% of cases). They consulted for both aesthetic and functional reasons (51% of cases) and required bimaxillary surgery (66% of cases). Comparison between the photographic angle (formed by the PSM and the line passing through the nasion and reaching the chin point) and the radiographic angle (formed by the PSM and the line passing through the Crista Galli process and the bony chin point angle) showed no significant difference (p = 0.937) and is thus reliable.


Assuntos
Cefalometria/métodos , Assimetria Facial/diagnóstico , Má Oclusão/diagnóstico , Mandíbula/anormalidades , Adolescente , Adulto , Queixo , Assimetria Facial/complicações , Assimetria Facial/patologia , Assimetria Facial/cirurgia , Feminino , Humanos , Masculino , Má Oclusão/epidemiologia , Má Oclusão/etiologia , Má Oclusão/cirurgia , Má Oclusão de Angle Classe III/diagnóstico , Má Oclusão de Angle Classe III/epidemiologia , Má Oclusão de Angle Classe III/etiologia , Má Oclusão de Angle Classe III/cirurgia , Mandíbula/diagnóstico por imagem , Mandíbula/patologia , Mandíbula/cirurgia , Procedimentos Cirúrgicos Ortognáticos/métodos , Fotografação/métodos , Reprodutibilidade dos Testes , Estudos Retrospectivos , Pele , Adulto Jovem
16.
Orthod Fr ; 89(1): 81-91, 2018 03.
Artigo em Francês | MEDLINE | ID: mdl-29676256

RESUMO

INTRODUCTION: The smile poses a challenge in the treatment of class III. Untreated, the class III patient presents excessive maxillary torque and a predominant display of the mandibular incisors, a sign that becomes more visible with age. Functional orthopedics restores the aesthetic appearance of the smile by maxillary protraction (sometimes temporarily because 20% of cases will still need surgery). Depending on the initial severity of the case (-4.5 mm AoBo would be the threshold value), the options are compensation or surgical correction. In both cases, the profile is improved but without normalising the cephalometric values. In recent years, the number of published cases treated by compensations (often using skeletal anchorage) has multiplied with broader indications, particularly for Asian patients in whom Le Fort I surgery gives questionable aesthetic results. Attention must be focused on the occlusal plane rotation which alters the smile by displaying the mandibular incisors. Nevertheless, surgery can handle the most severe cases with a greater degree of improvement. AIM: The aim of this article is to determine the cephalometric cut-off values for an acceptable smile in Class III patients. MATERIALS AND METHODS: We performed a search on Pubmed using the following keywords: Class III, anterior cross bite, smile, camouflage, orthognathic surgery; then secondarily, using references supplied by the articles found. We then analysed the data. RESULTS: The ortho-surgical protocol associated with extractions of maxillary first premolars appears to be the way to obtain the best results in terms of the smile (versus surgery without extractions and versus orthodontic compensations) because it is, in fact, the only way to restore the normal position and torque of the maxillary incisors, thus increasing their display during smiling.


Assuntos
Estética Dentária , Má Oclusão de Angle Classe III/cirurgia , Ortodontia Corretiva/métodos , Procedimentos Cirúrgicos Ortognáticos/métodos , Sorriso/fisiologia , Humanos , Má Oclusão de Angle Classe III/epidemiologia , Ortodontia Corretiva/normas , Procedimentos Cirúrgicos Ortognáticos/normas , Resultado do Tratamento
17.
Orthod Fr ; 89(1): 111-121, 2018 03.
Artigo em Francês | MEDLINE | ID: mdl-29676258

RESUMO

INTRODUCTION: The main causes of failures in canine traction are anchorage defects, incorrect direction of force, uncontrolled forces. An adolescent female (10 years, 9 months) presents with two included canines on the maxillary arch, in a palatal position and her lateral incisors (12 and 22) are microdontic. Two mini-screws are inserted on the palate, in a mesial position to 16 and 26 to secure the traction of 13 and 23; in general, braces are bonded after this first step. After debonding, mini-screws remain to help stabilize the palatal plate during the retention period and to avoid unaesthetic metallic wires and hooks which sometimes cause occlusal interferences. DISCUSSION: The alternatives are discussed: Ballista spring, mini-screw inserted in the palatal suture, Nance appliance… Conclusion: The multi-use of temporary anchorage devices during traction of palatally impacted canine(s) (especially in the case of bilateral inclusions) offer new alternatives by securing the canine displacement, eliminating almost all of the patient's compliance (no loss of sagittal anchorage). This type of small appliance increases the patient's comfort and decreases the complexity of activations. The global duration of treatment with braces can be decreased if no braces are needed during the first steps, and then retention can be more effective and more aesthetic, especially during smiling.


Assuntos
Parafusos Ósseos , Estética Dentária , Procedimentos de Ancoragem Ortodôntica , Desenho de Aparelho Ortodôntico , Dente Impactado/cirurgia , Placas Ósseas , Criança , Feminino , Humanos , Incisivo/patologia , Incisivo/cirurgia , Maxila/cirurgia , Procedimentos de Ancoragem Ortodôntica/instrumentação , Procedimentos de Ancoragem Ortodôntica/métodos , Técnicas de Movimentação Dentária/instrumentação , Técnicas de Movimentação Dentária/métodos
18.
Orthod Fr ; 88(3): 235-242, 2017 09.
Artigo em Francês | MEDLINE | ID: mdl-29043971

RESUMO

INTRODUCTION: The aim of this epidemiological study was to evaluate the need for orthodontic treatment in a sample of adults living in France. MATERIALS AND METHODS: The indicator selected was the dental component, IOTN (index of orthodontic treatment need). RESULTS: Among the 258 adults evaluated, 37% of patients had a strong need and 21% had a moderate need; 29% of those aged 35 and under were in strong need for treatment compared with 47% of those over 35 years, with the need for treatment increasing with age. The most frequent occlusal anomalies were dental migrations following an uncompensated tooth extraction (a situation that involved 22% of subjects). It was the only occlusal anomaly whose frequency increased significantly with age. Among patients with uncompensated tooth extraction, two thirds experienced dental migrations requiring orthodontic treatment. DISCUSSION: Although the IOTN indicator is widely used in the literature, it is controversial since all the characteristics evaluated are liable to impact longevity and the functioning and esthetics of the dentition, thus excluding any other consideration. The need for treatment in adults in France would therefore appear to be greater than in adolescents and would seem to increase with age, mainly due to uncompensated dental extractions.


Assuntos
Índice de Necessidade de Tratamento Ortodôntico , Ortodontia Corretiva , Adolescente , Adulto , Idoso , Estudos Transversais , Feminino , França/epidemiologia , Humanos , Masculino , Má Oclusão/epidemiologia , Má Oclusão/terapia , Pessoa de Meia-Idade , Adulto Jovem
19.
Orthod Fr ; 88(3): 263-274, 2017 09.
Artigo em Francês | MEDLINE | ID: mdl-29043974

RESUMO

OBJECTIVE: The objective of the study was to search for links between specific facial features and the psychology of the "good" and "bad" guys in cartoons. MATERIAL AND METHOD: We made 60 cephalometric tracings and compared the characters' profiles using statistical tests. RESULTS: The "bad guy" profile is closer to the normal profile of real humans than that of the "good guys". Profiles perceived as "good" in cartoons appear to be stereotyped. Thus, any profile not matching the "norm" can be interpreted as being unpleasant and consequently associated with the features of the "bad guys". The standard "bad guy" profile has a longer more prominent nose, a jutting chin (a bigger soft-tissue angle) and a higher upper third of the face than the lower third (the opposite of the standard profile of the "good guys"). DISCUSSION: These standardized portraits reflect and influence the (subconscious) prejudices of both young and less young movie-goers (not to mention the cartoonists) regarding their fellow humans.


Assuntos
Desenhos Animados como Assunto , Cefalometria , Face/anatomia & histologia , Humanos , Preconceito , Estereotipagem
20.
Orthod Fr ; 88(2): 131-138, 2017 Jun.
Artigo em Francês | MEDLINE | ID: mdl-28597834

RESUMO

OBJECTIVES: Orthodontic appliances are often removed before magnetic resonance imaging (MRI) scans because they are known to produce artefacts. The purpose of this study was to find the exact indications for removal of various fixed attachments when imaging four specific areas of the head and neck. MATERIALS AND METHODS: Sixty patients requiring an MRI scan of the head for medical reasons volunteered for this investigation. One of four different types of fixed attachments (stainless steel brackets, titanium brackets, ceramic brackets with metal slots, and stainless steel retainers) were assigned to a patient. Each patient had two scans at 1.5 T: with an "empty wax jig" and with a wax jig including the attachment. Archwires were not investigated as they are easily removed before a scan. Two radiologists evaluated the scans of each patient and each of the four areas under investigation: maxillary sinus, oral cavity, temporomandibular joints and posterior cerebral fossa. RESULTS: Stainless steel brackets always caused non-interpretability of all anatomic areas (100 per cent). Titanium brackets, ceramic brackets with metal slots, and stainless steel retainers caused artefact in the oral cavity only (for 20, 16.65, and 86.65 per cent of the subjects). CONCLUSIONS: Our results show that ceramic brackets with metal slots and titanium brackets do not always have to be removed before MRI scans of the head and neck, depending on the area under investigation. Metal fixed retainers should only be removed if the oral cavity itself is under investigation. Stainless steel brackets should always be removed before MRI scans of the head and neck.


Assuntos
Artefatos , Imagem por Ressonância Magnética , Aparelhos Ortodônticos , Adulto , Idoso , Idoso de 80 Anos ou mais , Cerâmica , Feminino , Humanos , Masculino , Seio Maxilar/diagnóstico por imagem , Pessoa de Meia-Idade , Boca/diagnóstico por imagem , Aço Inoxidável , Articulação Temporomandibular/diagnóstico por imagem , Titânio , Adulto Jovem
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