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1.
Orthod Fr ; 91(4): 303-321, 2020 Dec 01.
Artigo em Francês | MEDLINE | ID: mdl-33355535

RESUMO

The aim of this systematic review and meta-analysis was to compare self-ligating brackets (SLBs) considered as a whole to conventional brackets (CBs). An electronic search was performed in three databases (PubMed, MEDLINE via Web of Science, Cochrane Library) from their origin up to June 2017. Additional articles were hand searched from January 2006 to June 2017. This meta-analysis was restricted to randomized controlled trials (RCTs) and split mouth design studies (SMDs). No distinction was made between active and passive SLBs. The following variables were investigated : treatment duration, number of visits, alignment rate, rate of space closure, perception of discomfort during the initial phase of treatment, pain experience during wire insertion or removal, bond failure rate, time to ligate in or to untie an archwire, periodontal indices, occlusal outcomes, transverse arch dimensional changes and root resorption. 25 RCTs and 9 SMDs were finally selected. It was more painful to insert or remove a 0.019× 0.025 SS archwire in/from SLBs. It was significantly quicker to insert or remove an archwire from SLBs. There was less bleeding on probing with SLBs 4 or 5 weeks after bonding. All other variables did not exhibit any significant difference between SLBs and CBs. Out of the 31 comparisons between self-ligating and conventional brackets, 9 only revealed statistically significant differences. This meta-analysis contradicts most of the promotional statements put forward by the distributors.


Assuntos
Braquetes Ortodônticos , Reabsorção da Raiz , Face , Humanos , Boca , Desenho de Aparelho Ortodôntico , Fios Ortodônticos
2.
Orthod Fr ; 90(2): 149-159, 2019 Jun.
Artigo em Francês | MEDLINE | ID: mdl-31241457

RESUMO

INTRODUCTION:  Primary failure of eruption (PFE) can be defined as the partial or complete failure of eruption of at least one posterior tooth, without any mechanical obstacle; isolated and syndromic forms exist. PFE results from an abnormal dental eruption process that can affect temporary teeth and / or permanent teeth. Molars are the main affected teeth, inducing posterior infraclusions. Orthodontists are the specialists most often concerned by this rare pathology. Unsuccessful orthodontic-surgical traction therapies are commonly reported. MATERIALS AND METHODS:  The aim of our study using a prospective survey was to evaluate the level of knowledge reported by the orthodontists and the therapeutic difficulties they reported. An anonymous questionnaire was submitted to practitioners practicing in north-eastern France (Grand Est and Bourgogne-Franche-Comté regions). RESULTS:  The participation rate was 33.5%. In France, until 2015, specialization in orthodontics was obtained thanks to a local qualification, the Certificat d'Etudes Cliniques Spéciales - Mention Orthodontie (CECSMO), which has now been replaced by specialization following a national ranking competition. Most respondents obtained their qualification between 1980 and 2009 (80%), via the CECSMO (87%). Eighty-six per cent were aware of PFE but only 20% of them knew that PTHR1 (Parathyroid Hormone Receptor 1) gene could be involved in this pathology. The wide range of proposed therapies and the variable satisfaction rates highlight the difficulties encountered by practitioners. DISCUSSION:  Phenotypic variability complicates the diagnosis and makes any therapeutic systematization uncertain. CONCLUSION:  New clinical research projects, particularly in the field of molecular diagnosis, may improve understanding of genotype-phenotype correlations, and may potentially pilot therapeutic management.


Assuntos
Ortodontistas , Erupção Dentária , França , Humanos , Estudos Prospectivos , Inquéritos e Questionários
5.
Int Orthod ; 15(4): 728-739, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-29111127

RESUMO

The management of horizontal root fracture still presents a challenge to clinicians. The case of a 10-year-old boy with a horizontal root fracture in the left maxillary central incisor (tooth number 21) is described here. The fracture was present at the junction of the apical and the middle thirds. We report both the emergency care and the 5-year follow-up. At the same time, an orthodontic treatment was planned for a retained maxillary cuspid (tooth number 23), first composed of a high-pull headgear and then by a fixed multi-bracket appliance. Today, the tooth number 21 remains vital and symptomless. This report highlights the successful management of a horizontally fractured tooth requiring orthodontic treatment. Our work also underlines the advantages of 3D images [cone-beam computed tomography (CBCT)] in positive and differential diagnosis especially in the event of a suspicion of post-traumatic complication.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Incisivo/lesões , Fraturas dos Dentes/terapia , Raiz Dentária/lesões , Criança , Aparelhos de Tração Extrabucal , Seguimentos , Humanos , Imageamento Tridimensional , Incisivo/diagnóstico por imagem , Masculino , Maxila , Braquetes Ortodônticos , Radiografia Dentária , Radiografia Panorâmica , Fraturas dos Dentes/diagnóstico por imagem , Raiz Dentária/diagnóstico por imagem
6.
Orthod Fr ; 88(3): 243-250, 2017 09.
Artigo em Francês | MEDLINE | ID: mdl-29043972

RESUMO

INTRODUCTION: This study focuses on the effects of rapid maxillary disjunction on the tendency to canine impaction in patients displaying a maxillary transverse skeletal deficiency. MATERIALS AND METHODS: Using the segmentation method described by Ericson and Kurol and modified by Lindauer, et al., a series of panoramic views taken before and after disjunction was studied to compare changes in the position of the tip of the maxillary canine depending on whether it was covered or not by the homolateral lateral incisor, according to the side and patient's sex. The cohort consisted of 193 patients, all treated using a palatal expander welded to bands. RESULTS: A statistically significant improvement was observed in all categories regarding the position of the maxillary canine. Disjunction was successful in 87% of cases in our sample. No significant differences were found according to side or sex.


Assuntos
Maxila/anormalidades , Técnica de Expansão Palatina , Dente Impactado/terapia , Criança , Estudos de Coortes , Dente Canino/diagnóstico por imagem , Feminino , Humanos , Anormalidades Maxilomandibulares/terapia , Masculino , Radiografia Panorâmica , Dente Impactado/diagnóstico por imagem
7.
Orthod Fr ; 88(3): 275-281, 2017 09.
Artigo em Francês | MEDLINE | ID: mdl-29043975

RESUMO

OBJECTIVE: The objective of this study is to assess the level of knowledge in a cohort of oral health professionals and patients about preventive and therapeutic actions of sugar-free chewing gums. MATERIALS AND METHODS: A forward-looking monocentric study of perception regarding the level of information about the effects of sugar-free chewing gums consumption was conducted on 135 young patients, from 11 to 17 years old, carriers of fixed orthodontic appliances and treated in the Department of Orthodontics in the Oral Medicine and Surgery Center of the University Hospitals of Strasbourg. Besides, 34 practitioners in the Department of Orthodontics and Pediatric Dentistry were also included. Data were collected between May 2016 and July 2016. A specific questionnaire, using the adapted terminology and dealing with the same items was developed for each studied population. RESULTS: The majority of the individuals of both studied populations believe that the consumption of sugar-free chewing gum leads to a greater risk of orthodontic device unsticking or fracture and that it is not associated to a decrease of the orthodontic pain. DISCUSSION: Our results confirm the fact that the knowledge, mainly acquired in an empirical way, is against the data of the current literature. The evaluation of the level of knowledge demonstrated that there is a real lack of information about the preventive interests of the consumption of sugar-free chewing gums during orthodontic treatment. CONCLUSIONS: This study highlights the need for information campaigns and oral prevention in general population, as well as in healthcare professionals, concerning the preventive and analgesic interests of sugar-free chewing gums during orthodontic treatments.


Assuntos
Goma de Mascar , Competência Clínica , Conhecimentos, Atitudes e Prática em Saúde , Adolescente , Atitude do Pessoal de Saúde , Criança , Estudos Transversais , Cárie Dentária/prevenção & controle , Placa Dentária/prevenção & controle , Odontólogos , Humanos , Ortodontistas , Inquéritos e Questionários
8.
Biomed Mater Eng ; 28(s1): S169-S177, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28372292

RESUMO

Although orthodontics have greatly improved over the years, understanding of its associated biomechanics remains incomplete and is mainly based on two dimensional (2D) mechanical equilibrium and long-time clinical experience. Little experimental information exists in three dimensions (3D) about the forces and moments developed on orthodontic brackets over more than two or three adjacent teeth. We define here a simplified methodology to quantify 3D forces and moments applied on orthodontic brackets fixed on a dental arch and validate our methodology using existing results from the literature by means of simplified hypotheses.


Assuntos
Arco Dental/fisiologia , Análise do Estresse Dentário , Braquetes Ortodônticos , Estresse Mecânico , Dente/fisiologia , Algoritmos , Fenômenos Biomecânicos , Humanos , Desenho de Aparelho Ortodôntico , Fios Ortodônticos
9.
Biomed Mater Eng ; 28(s1): S179-S184, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28372293

RESUMO

Orthodontic appliances deliver forces and moments that will determine movement of teeth. To analyze this latter, we developed an experimental setup to measure the mechanical forces applied on the teeth and to calculate, through a simplified theoretical analysis, the reactive forces and corresponding moments onto the brackets of three adjacent teeth. To validate the theoretical and experimental results, we use a simplified clinical situation of a maxillary canine in infraclusion and surrounded by its corresponding upper lateral incisor and first premolar. Forces are then measured experimentally and compared with the calculated results. From this, we show the specific dissymmetry of the mechanical forces on each side of the maxillary canine due to the applied mechanical forces and the undesirable induced generated moments occurring on each tooth that will directly impact the bone remodeling process and the final tooth repositioning.


Assuntos
Análise do Estresse Dentário , Braquetes Ortodônticos , Estresse Mecânico , Dente/fisiologia , Dente Pré-Molar/anatomia & histologia , Dente Pré-Molar/fisiologia , Fenômenos Biomecânicos , Remodelação Óssea , Simulação por Computador , Análise do Estresse Dentário/métodos , Humanos , Incisivo/anatomia & histologia , Incisivo/fisiologia , Modelos Biológicos , Desenho de Aparelho Ortodôntico , Dente/anatomia & histologia
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