[Evaluation of motivational factors of adolescent patients for orthodontic treatment using the Q methodology].

The management of adolescents in the orthodontic practice remains a challenge in terms of motivation and adherence to treatment. Some factors seem to be of paramount importance in the success of treatment. The objective of the present study was to evaluate the motivational factors of adolescent patients seeking orthodontic treatment using the Q methodology.

Variable selection with Group LASSO approach: Application to Cox regression with frailty model.

In analysis of survival outcomes supplemented with both clinical information and high-dimensional gene expression data, use of the traditional Cox proportional hazards model fails to meet some emerging needs in biomedical research. First, the number of covariates is generally much larger the sample size. Secondly, predicting an outcome based on individual gene expression is inadequate because multiple biological processes and functional pathways regulate phenotypic expression.

Absence of association between polymorphisms in the pfcoronin and pfk13 genes and the presence of Plasmodium falciparum parasites after treatment with artemisinin derivatives in Senegal.

Due to resistance to chloroquine and sulfadoxine/pyrimethamine, treatment for uncomplicated Plasmodium falciparum malaria switched to artemisinin-based combination therapy (ACT) in 2006 in Senegal. Several mutations in the gene encoding the kelch13 helix (pfk13-propeller) have been identified as associated with in vitro and in vivo artemisinin resistance in Southeast Asia. Additionally, three mutations in the pfcoronin gene (G50E, R100K and E107V) have been identified in two culture-adapted Senegalese field isolates that became resistant in vitro to artemisinin after 4 years of intermittent selection with dihydroartemisinin.

Orthopantomographic analysis of the intraosseus position of the maxillary canines.

The aim of this work was to analyse the intraosseous position of the maxillary canine in orthodontic patients. It was an exploratory pilot study prior to the next research work to develop a predictive model based on a regression analysis initially including a large number of variables. 105 subjects from 6 to 12 years from both genders were included in this study.

Impact of recent artisanal small-scale gold mining in Senegal: Mercury and methylmercury contamination of terrestrial and aquatic ecosystems.

In Senegal, the environmental impact of artisanal small-scale gold mining (ASGM) using mercury (Hg) is poorly documented despite its intensification over the past two decades. We report here a complete dataset including the distribution and speciation of Hg in soil, sediment, and water in pristine and ASGM impacted sites of the Gambia River ecosystem (Kedougou region - eastern Senegal). Selective extraction showed that soils surrounding ASGM activities were contaminated with elemental Hg [Hg(0)] at concentrations up to 3.

[Relationships between the size of the adenoids and the dental arch measurements].

Introduction: Enlarged adenoids are often associated with oral breathing. The latter can impact the dental arches. The purpose of this study was to determine the relationships between dental arch measurements and the size of adenoids.

Bibliometric study of articles on skeletal Class II malocclusions published in four high impact factor journals.

Objective: Perform a bibliometric analysis of the orthodontic literature on skeletal Class II malocclusions during the first decade of the 21st century.

Materials And Methods: A retrospective, observational, and comprehensive study ranging from January the first 2001 to December 31 2010, based on the articles published in four high impact factor orthodontic journals: Angle Orthod, OCR, EJO, and AJODO (Quotation Report Newspaper of the Scientific Information Institute).

Results: In the 4565 reviewed articles, only 338 were published on Class II malocclusions.

Relationships between the obstructive character of the tonsils and the type of ventilation and lip posture.

Introduction: The role of obstructive tonsils in ventilatory disorders and abnormal lip posture is widely discussed in the literature but remains controversial. The data reported on the probable relationship between obstructive tonsils and an existing breathing disorder or lip incompetence were subjective. The purpose of this study was to evaluate the relationship between the obstructive character of the tonsils and the type of ventilation and lip posture.

A radiographic study of the mandibular third molar root development in different ethnic groups.

Background: The nature of differences in the timing of tooth formation between ethnic groups is important when estimating age.

Aim: To calculate age of transition of the mandibular third (M3) molar tooth stages from archived dental radiographs from sub-Saharan Africa, Malaysia, Japan and two groups from London UK (Whites and Bangladeshi).

Materials And Methods: The number of radiographs was 4555 (2028 males, 2527 females) with an age range 10-25 years.

[Two clinical examples of the use of orthodontic mini-screws].

Orthodontic needs to reply on a reliable anchoring as fixed as possible to ensure the best orthodontic movements. The orthodontic mini-screws provide a fixed anchorage for performing movements and treatments considered until then to be difficult or even impossible, particularly the treatment of ingression in the posterior area. The orthodontic anchorage mini-screw has the advantage of being cheaper, easier to place and do not require surgical procedure.

[Sagittal photogrammetric evaluation of the soft tissue profile between two different racial groups: a comparative study].

Introduction: Facial soft-tissue analyses made from photographic records (photogrammetric analysis of the soft tissues) showed interracial dimorphism. Standard of these facial analyses, originally obtained from Caucasian might not be appropriate for the diagnosis and treatment planning of other groups of orthodontic patients. The purpose of this study was to compare the sagittal photogrammetric soft tissue profile characteristics between Senegalese and Moroccan adults.

[Correlation between sagittal photogrammetric measurements of the soft tissue profile and dental arches measurements].

Introduction: Sagittal soft-tissue analyses made from photographic records (sagittal photogrammetric analysis of the soft tissues) allow orthodontists to quantify the sagittal dimension and situation of the facial soft tissues. These tissues maintain close anatomical relationships with the underlying dental arches. However, little importance has been given to the description and the comparison of the sagittal soft tissue morphology according to dental arches parameters.

Adaptation and validation of the Moroccan Arabic version of the Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ).

Objective: The aims of this study were to translate and culturally adapt the PIDAQ native English version into Moroccan Arabic, and to assess the psychometric characteristics of the version thereby obtained.

Materials And Methods: The PIDAQ original English version was sequentially subjected to translation into Moroccan Arabic, back-translation into English, committee review, and pre-testing in 30 subjects seeking orthodontic treatment.

Results: The final Moroccan Arabic version further underwent an analysis of psychometric properties on a random sample of 99 adult subjects (84 females and 15 males, aged 20.

[Comparison of the dental measurements according to the obstructive character of the tonsils].

Introduction: The role of obstructive tonsils in dental arches abnormalities is widely discussed in the literature but remains controversial. Data on the probable relationship between obstructive tonsils and the presence of these orthodontic abnormalities are subjective. The objective of this study is to quantify the relationship between the obstructive character of the tonsils and the dental arches measurements.

[Relationship between the obstructive character of the tonsils and the sagittal cephalometric measurements].

Introduction: The role of obstructive tonsils in the sagittal dimension of the skeleton-dental abnormalities is widely discussed in the literature but remains controversial. Data on the probable relationship between obstructive tonsils and the presence of these abnormalities were subjective. The objective of this study was to quantify the relationship between the obstructive character of the tonsils and the sagittal cephalometric measurements.

Influence of tonsil size on sagittal cephalometric measurements.

Introduction: The role of tonsils in the origin of sagittal skeletodental abnormalities has been widely discussed in the literature but remains controversial. Data on the probable relationship between enlarged tonsils and the presence of these abnormalities were subjective. The aim of this study was to quantify the relationship between the space occupied by the palatine tonsils and sagittal cephalometric measurements.

[Relationship between bizygomatic width and the size of maxillary anterior teeth among young Senegalese black people recruited in army].

Introduction: Prosthetic teeth size and placement must be in perfect harmony with the bucco-facial structures for a successful and esthetic removable prosthesis. This study aimed to determine among young Senegalese black people facial index estimating maxillary central incisor width and distance between canine points starting from bizygomatic width.

Patients And Methods: 621 black Senegalese participated to this transversal study.

Influence of tonsillar grade on the dental arch measurements.

Introduction: The role of the palatine tonsils in the development of dental intra-arch and interarch abnormalities is often brought up in the literature, but it remains controversial. Data on the probable relationship between enlarged tonsils and the occurrence of orthodontic abnormalities are subjective. The purpose of this study was to seek an association between the space occupied by the palatine tonsils and the dental arch measurements.

Human exposure to mercury in artisanal small-scale gold mining areas of Kedougou region, Senegal, as a function of occupational activity and fish consumption.

We investigated mercury (Hg) exposure of food web and humans in the region of Kedougou, Senegal, where Hg is used for gold amalgamation in artisanal small-scale gold mining (ASGM). For this purpose, total mercury (THg) concentration was determined in eight fish species and two shellfish species from Gambia River and in human hair from 111 volunteers of different age and sex, living in urban locations (Kedougou and Samekouta) or in ASGM areas (Tinkoto and Bantako). THg concentrations in fish samples range from 0.