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1.
Sensors (Basel) ; 21(5)2021 Mar 07.
Artículo en Inglés | MEDLINE | ID: mdl-33799930

RESUMEN

BACKGROUND: In the dental field, digital technology has created new opportunities for orthodontists to integrate their clinical practice, and for patients to collect information about orthodontics and their treatment, which is called "teledentistry." Dental monitoring (DM) is a recently introduced orthodontic application that combines safe teledentistry with artificial intelligence (AI) using a knowledge-based algorithm, allowing an accurate semi-automatic monitoring of the treatment. Dental Monitoring is the world's first SaaS (Software as a Service) application designed for remote monitoring of dental treatment, developed in Paris, France, with Philippe Salah as the Co-founder and CEO. CASES PRESENTATION: This report describes two cases in which DM system was essential to achieve the control of certain movements: it was possible to follow the movement, even if complex, such as the anterior cross of an adult patient and a lack of space in the canine of the growing patient. The software analyzed the fit and retention of the aligner, thus ensuring correct biomechanics. They were treated during the COVID-19 pandemic lockdown with aligners. The first case is a growing patient who was monitored during an interceptive orthodontic treatment to manage a retained upper canine. The second case is an adult patient forced to finalize his treatment of upper lateral incisor crossbite. The software analyzed the fit and retention of the aligner, thus ensuring correct biomechanics. CONCLUSIONS: DM system appears to be a promising method, useful for improving the interaction between doctor and patient, generally acceptable and useful to patients, even in critical clinical situations, at least in cases with optimal compliance and ability to use the tool properly.


Asunto(s)
Inteligencia Artificial , Diseño de Aparato Ortodóncico , Programas Informáticos , Telemedicina , Técnicas de Movimiento Dental , Adulto , Control de Enfermedades Transmisibles , Francia , Humanos , Pandemias
2.
Prog Orthod ; 22(1): 9, 2021 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-33748887

RESUMEN

BACKGROUND: The mechanical strength of mini-implants is a critical factor due to their small diameters. Currently, it is not possible to state whether there is a relevant difference between the mechanical properties of stainless steel (SS-MIs) and titanium alloy mini-implants (TA-MIs). The objective of this study was to test the null hypothesis that there is no difference in the mechanical strength of SS-MIs and TA-MIs, and to analyze, by scanning electron microscopy (SEM), the SS-MI, and TA-MI threads resistance to morphological damage after insertion. METHODS: A standardized sample of 504 SS-MIs and TA-MIs with diameters ranging from 1.2 mm to 1.8 mm was used. Torsional fracture was performed in 154 MIs. Flexural strength of 280 MIs was evaluated at 1 mm and 2 mm-deflection. The threads of 70 MIs were morphologically analyzed by scanning electron microscopy (SEM), before and after their insertion in high-density artificial bone blocks. Comparisons between SS-MIs and TA-MIs were performed with t tests or Mann-Whitney U tests. A multiple linear regression analysis was used to evaluate the influence of variables on the ranging of MI mechanical strength. RESULTS: SS-MIs had higher fracture torque. The mean difference between the SS-MIs and TA-MIs fracture torque was of 4.09 Ncm. The MI diameter explained 90.3% of the total variation in fracture torque, while only 2.2% was explained by the metallic alloy. The SS-MI group presented a higher deformation force during the 1mm and 2mm-deflection. The mean difference between the flexural strength of SS and TA-MIs at 1 mm and 2 mm-deflection was of 18.21 N and 17.55 N, respectively. There was no noticeable morphological damage to the threads of SS-MIs and TA-MIs. CONCLUSIONS: The null hypothesis was rejected. SS-MIs were 13.2% and 20.2% more resistant to torsional fracture and deflection, respectively. The threads of the SS-MIs and TA-MIs were not damaged during the insertion and removal process. Thus, the use of SS-MI can reduce the fracture risk without increasing the MI diameter.


Asunto(s)
Métodos de Anclaje en Ortodoncia , Acero Inoxidable , Aleaciones , Humanos , Laboratorios , Ensayo de Materiales , Diseño de Aparato Ortodóncico , Estrés Mecánico , Titanio , Torque
3.
Eur J Paediatr Dent ; 22(1): 35-40, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33719481

RESUMEN

BACKGROUND: The aim of this paper is to illustrate the use of a modified vertical holding appliance (G-VHA) to obtain the vertical control of maxillary molars and tongue stimulation in order to achieve a transverse activation in growing patients with dental open bite without the patient's compliance. CASE REPORTS: The G-VHA is a modified trans-palatal bar with a resin pad covering the Omega central loop and two adjunctive lateral loops to ensure the bar flexibility. The G-VHA is designed to direct the force of the tongue against the upper molars to generate intrusion and at the same time to stimulate and re-educate the tongue. Two cases of dental open bite in growing patients are illustrated. Both patients were successfully treated, and the open bite was fully corrected thanks to molar intrusion, following counterclockwise rotation of the mandible and tongue correction. Finishing of alignment was performed in phase II of the treatment with conventional appliances. CONCLUSION: The G-VHA proved to be effective in controlling the vertical position of maxillary molars promoting the counter-clockwise rotation of the mandible and stimulating a different tongue posture.


Asunto(s)
Mordida Abierta , Cefalometría , Humanos , Mandíbula , Diente Molar , Mordida Abierta/terapia , Diseño de Aparato Ortodóncico , Técnicas de Movimiento Dental
4.
Am J Orthod Dentofacial Orthop ; 159(4): 470-479, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33558030

RESUMEN

INTRODUCTION: The aims of this study were to evaluate the long-term skeletodental effects, the volume of maxillary tuberosity, and airway space changes after maxillary molar distalization using modified C-palatal plate (MCPP) in adolescents with Class II malocclusion. METHODS: The sample consisted of 20 adolescent patients (MCPP group; mean age, 12.9 ± 1.0 year) who underwent bilateral distalization of their maxillary dentition and 20 subjects as a control group. In the MCPP group, cone-beam computed tomography images were taken before distalization, at the end of the treatment, and during retention with a minimum of a 3-year posttreatment follow up period. Repeated measures ANOVA followed by post-hoc analysis with the Bonferroni test were used to identify significant differences between time points. RESULTS: After the long-term observation period, sagittal skeletal and dental relationships were maintained (there were no significant changes in ANB, occlusal plane angle, and overjet postretention). The vertical skeletal dimension did not change during treatment and was stable at the long-term follow-up (the mandibular plane angle and ANS-Me were relatively well maintained). The volume of the maxillary tuberosity showed no significant change during long-term retention. However, the volume was significantly smaller in the treatment group than in the control group (P <0.0001). There were no significant airway space changes after distalization and the postretention period. In addition, there was no significant difference between the MCPP and control groups. CONCLUSIONS: Improved sagittal skeletal and dental relationships because of treatment were maintained in the long-term evaluation. There was no negative long-term effect on airway space associated with the maxillary arch distalization. Therefore, these findings might be beneficial for clinicians in diagnosis and treatment planning for Class II malocclusion in adolescents.


Asunto(s)
Maloclusión de Angle Clase II , Técnicas de Movimiento Dental , Adolescente , Cefalometría , Niño , Tomografía Computarizada de Haz Cónico , Humanos , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Maxilar/diagnóstico por imagen , Diseño de Aparato Ortodóncico
5.
Am J Orthod Dentofacial Orthop ; 159(4): e363-e375, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33573898

RESUMEN

INTRODUCTION: Rapid palatal expansion is a common therapy during orthodontic treatment and could be a preliminary step for correcting different malocclusions; furthermore, this treatment could be necessary at any age. Different anchorage approaches have been proposed to obtain an effective skeletal result, although every device produces both dental and skeletal effects. This study aimed to compare the dentoskeletal effects of a bone-borne palatal expander considering 2 groups of patients of different ages. METHODS: Twenty-four patients consecutively treated were included in the study; patients were divided into 2 groups according to their age: group 1 with age ≤16 years and group 2 patients >16 years. All patients had a preexpansion cone-beam computed tomography scan; a second scan was required at the end of activations. All patients received a bone-borne appliance anchored on 4 miniscrews. RESULTS: Significant intragroup differences were found for maxillary width and dental diameters. No significant differences were found between groups with regard to longitudinal changes, except for the maxillary right plane. CONCLUSIONS: The use of bone-borne maxillary expansion was effective in generating palatal widening both in growing and young adult patients. No significant skeletal or dental differences were found between groups.


Asunto(s)
Maloclusión , Técnica de Expansión Palatina , Adolescente , Tomografía Computarizada de Haz Cónico , Humanos , Maloclusión/diagnóstico por imagen , Maloclusión/terapia , Maxilar/diagnóstico por imagen , Diseño de Aparato Ortodóncico , Adulto Joven
6.
Am J Orthod Dentofacial Orthop ; 159(3): e275-e280, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33518439

RESUMEN

INTRODUCTION: The purpose of this study was to compare predicted anterior teeth intrusion measurements with the actual clinical intrusion measurements using cone-beam computed tomography. Understanding the precision of the software in anticipating changes may help practitioners predict the need for overcorrection. METHODS: Twenty-two patients, with a mean age of 23.74 years, who underwent Invisalign (Align Technology, Santa Clara, Calif) clear aligners treatment for both arches only after having completed treatment with an initial series of aligners were included in this study. The pretreatment and posttreatment cone-beam computed tomography scans after the initial series were acquired by a single orthodontist practitioner. ClinCheck measurements were recorded with Align Technology. The long axis of the anterior tooth intrusion movement was measured in 142 teeth. A comparison between the predicted and actual measurements of anterior intrusion of the teeth was performed, and the intraclass correlation coefficients showed an almost perfect agreement in the linear measurements. RESULTS: A statistically notable difference between the predicted and actual measurements of anterior intrusion. The predicted intrusion movement of the maxillary canines (P = 0.001), maxillary lateral incisors (P <0.0001), and maxillary central incisors (P <0.0001) significantly differed from the actual values. Similarly, the intrusion movement in the mandibular teeth seemed to be inaccurate, with significant differences in the mandibular canines (P <0.0001) and mandibular lateral and central incisors (P <0.0001). CONCLUSIONS: The mean precision of true anterior intrusion with Invisalign clear aligners was 51.19%, and the mean amount of correction was 48.81%. The use of other supplementary methods of anterior teeth intrusion may be helpful to reduce the rate of midcourse corrections and refinements.


Asunto(s)
Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos Removibles , Adulto , Tomografía Computarizada de Haz Cónico , Humanos , Incisivo/diagnóstico por imagen , Técnicas de Movimiento Dental , Adulto Joven
7.
Prog Orthod ; 22(1): 2, 2021 Jan 07.
Artículo en Inglés | MEDLINE | ID: mdl-33409700

RESUMEN

BACKGROUND: The aim of this study was to investigate the effect of surface roughening and acid etching on clinical success rate and removal and insertion torque of orthodontic miniscrews. MATERIALS AND METHODS: Sixty-two orthodontic miniscrews (Jail Medical Corporation, Seoul, Korea) with the same design and dimensions (10-mm length, 2-mm diameter) are divided into two (sandblasted and acid-etched versus control) groups. The sample of the study was 31 patients whose miniscrews were needed for en masse retraction of the upper six anterior teeth. In this split-mouth study, the miniscrews were placed in the attached gingiva between the second premolar and the first molar. The side (left or right) was selected randomly. The miniscrews were loaded 6 weeks after insertion, and the patients were followed up after 3, 6, 10, 14, and 18 weeks and then for 4 weeks interval. Chi-square, correlation, and independent t tests were done using SPSS ver24 to interpret the data. RESULTS: The survival rate was 90.3% and 83.9% for the sandblasted and acid-etched versus the control group, respectively. The difference in survival rate was not statistically significant (p > 0.05). Removal torque was higher for the sandblasted group (p < 0.05). Younger patients showed less survival rate (p < 0.05) in both groups. Insertion side, namely, left or right, was not statistically significant. CONCLUSIONS: Although sandblasting increased removal torque, it did not influence the survival rate of orthodontic miniscrews significantly.


Asunto(s)
Métodos de Anclaje en Ortodoncia , Tornillos Óseos , Humanos , Boca , Diseño de Aparato Ortodóncico , Tasa de Supervivencia , Torque
8.
Prog Orthod ; 22(1): 3, 2021 Jan 18.
Artículo en Inglés | MEDLINE | ID: mdl-33458787

RESUMEN

BACKGROUND: Patient quality of life (QoL) during orthodontic treatment is an important consideration that requires greater academic investigation as greater focus is placed on enhancing patient experience. Quality of life (QoL) was assessed in three orthodontic appliance groups, i.e., vestibular, lingual, and aligners during the initial stages of treatment. The sample was comprised of 117 adult patient-subjects distributed into 3 groups: vestibular (n = 41), lingual (n = 37), and aligner (n = 39). A WHOQOL-BREF questionnaire surveyed four domains (physical health, psychological health, social relationships, and environment). RESULTS: Mean scores for domain 1, physical health, showed that the aligner group (28.1) had significantly greater scores than that of the vestibular (22.7) or lingual (22) groups. Domain 2, psychological health, demonstrated significant differences (P < 0.001) between all groups, with the aligner group scoring the highest (23.2), followed by the lingual (18.4) and vestibular (15.2) groups. Domain 3, social relationship, showed that aligner (10.9) and lingual (10.2) scores were significantly greater (P < 0.001) than those of the vestibular group (7.8). Domain 4, environment, displayed significant differences between all groups, with the aligner group scoring highest (32.1), followed by the lingual group (29.3), and lastly the vestibular group (26.4). Overall, the highest mean score was obtained by the aligner group (23.1) and the lowest mean score was by the vestibular group (18). The mean domain scores for all three groups were significantly different (P ≤ 0.005) from each other (Table 2). CONCLUSIONS: Overall, patients undergoing Aligner therapy reported the overall highest QoL scores, followed by lingual and vestibular groups.


Asunto(s)
Aparatos Ortodóncicos , Calidad de Vida , Adulto , Humanos , Diseño de Aparato Ortodóncico , Encuestas y Cuestionarios
9.
Orthod Craniofac Res ; 24 Suppl 1: 103-112, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33484608

RESUMEN

OBJECTIVES: The aim of this systematic review is to assess the treatment effects (amount of distalization, distal tipping and vertical movement) of buccally versus palatally placed temporary skeletal anchorage devices (TSADs) on maxillary first molars during distalization. MATERIALS AND METHODS: Medline and Scopus databases were searched up to September 2020 for randomized controlled trials (RCTs) and non-randomized prospective cohort studies on maxillary molar distalization using TSADs in patients with Class II malocclusion. After study selection, data extraction and risk of bias assessment, meta-analyses were performed for the amount of distalization, distal tipping and intrusion of first molars. RESULTS: Nine studies (2 RCTs and 7 prospective studies) were included. The risk of bias of the RCTs was low to unclear. The non-randomized studies were of moderate quality. In five studies, the TSADs were placed in the infrazygomatic process while in two studies, they were placed in the buccal inter-radicular spaces, and in two studies, they were placed in the midpalatal region. The first molar distalization was 2.75 mm when buccal inter-radicular TSADs were used, but 4.07 and 4.17 mm with palatal and infrazgomatic TSADs. The palatal appliances were associated with 11.17° of distal tipping of the first molar while infrazygomatic and buccal inter-radicular TSADs resulted in 3.99° and 1.70° of tipping, respectively. CONCLUSIONS: Inter-radicular TSADs resulted in less distal tipping but also in less distalization. Palatal TSAD-supported appliances showed the greatest amount of distal tipping. Further RCTs or prospective studies on the effect of various designs of TSAD-supported distalization are warranted.


Asunto(s)
Maloclusión de Angle Clase II , Métodos de Anclaje en Ortodoncia , Cefalometría , Humanos , Maxilar , Diente Molar , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos , Técnicas de Movimiento Dental
11.
J Esthet Restor Dent ; 33(1): 253-258, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33410248

RESUMEN

Orthodontics as well as dentistry are undergoing a technological revolution with advances in medical imaging, 3D printing and customization of appliances and devices. Digital orthodontics can be defined as the process of manufacturing customized appliances based on a target setup which incorporates tooth positioning in six-degrees-of-freedom. Three-dimensional medical imaging provides better diagnostic tools and allows for fabrication of orthodontic appliances based on the coordinates system of the occlusal plane within the facial anatomy. This article describes the state-of-the-art in goal-driven orthodontic treatment, warns against the commercialization of our profession, and highlights the advantages of lingual orthodontics in terms of protection of the enamel.


Asunto(s)
Ortodoncia , Imagenología Tridimensional , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos , Impresión Tridimensional
12.
Angle Orthod ; 91(2): 149-156, 2021 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-33434285

RESUMEN

OBJECTIVES: To determine dentoalveolar and skeletal effects produced in mature patients by the Carriere Motion Class III (CM3) appliance followed by fixed appliances. MATERIALS AND METHODS: This retrospective study evaluated 32 patients at three time points: T1 (initial), T2 (removal of CM3), and T3 (posttreatment). Serial cephalograms were traced and digitized, and best-fit regional superimpositions were constructed. Eleven linear and 7 angular variables were measured. The starting forms of the CM3 patients were compared with a sample of untreated subjects with normal occlusions and well-balanced faces. RESULTS: The CM3 phase lasted 6.3 months, followed by a phase of fixed appliances lasting 12.9 months; the total duration of treatment was 19.2 months. Minimal skeletal changes were measured sagittally, with only a slight increase in lower anterior facial height observed during treatment. Most treatment changes were dentoalveolar in nature. Wits appraisal increased 4.0 mm during treatment. The molar relationship improved by 6.0 mm during phase I, a value that rebounded slightly during phase II, resulting in an improvement toward Class I of 4.8 mm. Best-fit regional superimpositions revealed anterior movement of upper molars relative to the maxilla and posterior movement of lower molars relative to the mandible. CONCLUSIONS: The Carriere Motion Class III appliance is an effective and efficient method of resolving occlusal problems in minimally growing Class III patients. Primary treatment effects are dentoalveolar in nature with minimal skeletal alterations.


Asunto(s)
Maloclusión de Angle Clase II , Aparatos Ortodóncicos Funcionales , Adolescente , Adulto , Cefalometría , Humanos , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Mandíbula , Maxilar , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos Fijos , Estudios Retrospectivos
13.
Angle Orthod ; 91(1): 22-29, 2021 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-33339047

RESUMEN

OBJECTIVES: To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. MATERIALS AND METHODS: The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. RESULTS: The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. CONCLUSIONS: The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.


Asunto(s)
Maloclusión de Angle Clase II , Diseño de Aparato Ortodóncico , Adolescente , Cefalometría , Femenino , Humanos , Masculino , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Maxilar , Técnicas de Movimiento Dental
14.
Medicine (Baltimore) ; 99(50): e23165, 2020 Dec 11.
Artículo en Inglés | MEDLINE | ID: mdl-33327234

RESUMEN

BACKGROUND: Although several researchers have analyzed the dental identity of patients experience with corrective methods using fixed and removable appliances, the consequences stay debatable. This meta-analysis intended to verify whether the periodontal status of removable appliances is similar to that of the conventional fixed appliances. METHODS: Relevant literature was retrieved from the database of Cochrane library, PubMed, EMBASE, and CNKI until December 2019, without time or language restrictions. Comparative clinical studies assessing periodontal conditions between removable appliances and fixed appliances were included for analysis. The data was analyzed using the Stata 12.0 software. RESULTS: A total of 13 articles involving 598 subjects were selected for this meta-analysis. We found that the plaque index (PLI) identity of the removable appliances group was significantly lower compared to the fixed appliances group at 3 months (OR = -0.57, 95% CI: -0.98 to -0.16, P = .006) and 6 months (OR = -1.10, 95% CI: -1.60 to -0.61, P = .000). The gingival index (GI) of the removable appliances group was lower at 6 months (OR = -1.14, 95% CI: -1.95 to -0.34, P = .005), but the difference was not statistically significant at 3 months (OR = -0.20, 95% CI: -0.50 to 0.10, P = .185) when compared with that of the fixed appliances group. The sulcus probing depth (SPD) of the removable appliances group was lower compared to the fixed appliances group at 3 months (OR = -0.26, 95% CI: -0.52 to -0.01, P = .047) and 6 months (OR = -0.42, 95% CI: -0.83 to -0.01, P = .045). The shape of the funnel plot was symmetrical, indicating no obvious publication bias in the Begg test (P = .174); the Egger test also indicated no obvious publication bias (P = .1). CONCLUSION: Our meta-analysis demonstrated that malocclusion patients treated with the removable appliances demonstrated a better periodontal status as compared with those treated with fixed orthodontic appliances. However, the analyses of more numbers of clinical trials are warranted to confirm this conclusion.


Asunto(s)
Maloclusión/terapia , Aparatos Ortodóncicos Fijos/efectos adversos , Aparatos Ortodóncicos Removibles/efectos adversos , Enfermedades Periodontales/etiología , Adolescente , Adulto , Niño , Femenino , Humanos , Masculino , Maloclusión/clasificación , Maloclusión/diagnóstico , Persona de Mediana Edad , Diseño de Aparato Ortodóncico/tendencias , Aparatos Ortodóncicos/provisión & distribución , Evaluación de Resultado en la Atención de Salud , Enfermedades Periodontales/epidemiología , Índice Periodontal , Ensayos Clínicos Controlados Aleatorios como Asunto
15.
Orthod Fr ; 91(4): 303-321, 2020 Dec 01.
Artículo en Francés | MEDLINE | ID: mdl-33355535

RESUMEN

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.


Asunto(s)
Soportes Ortodóncicos , Resorción Radicular , Cara , Humanos , Boca , Diseño de Aparato Ortodóncico , Alambres para Ortodoncia
16.
J Clin Pediatr Dent ; 44(6): 451-458, 2020 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-33378466

RESUMEN

OBJECTIVE: The surface roughness of various orthodontic materials could affect biofilm formation and friction. The purpose of this study was to examine the surface roughness and chemical composition of the slots and wings of several ceramic self-ligating brackets. STUDY DESIGN: Four types of ceramic self-ligating brackets were separated into experimental groups (DC, EC, IC, and QK) while a metal self-ligating bracket (EM) was used as the control group. Atomic force microscopy and energy-dispersive x-ray spectroscope were used to examine the surface roughness and chemical composition of each bracket slot and wing. RESULTS: The control group was made of ferrum and chrome while all the experimental groups were comprised of aluminum and oxide. There was a statistically significant difference in the roughness average (Sa) among the various self-ligating brackets (p< 0.001 in slots and p<0.01 in the wing). The slots in the EC group had the lowest Sa, followed by the DC, IC, control, and QK groups. The wings in the IC group had the lowest Sa, followed by the EC, DC, control, and QK groups. CONCLUSIONS: There is a significant difference in the surface roughness of the slots and wings among several types of ceramic self-ligating brackets.


Asunto(s)
Soportes Ortodóncicos , Biopelículas , Cerámica , Aleaciones Dentales , Fricción , Humanos , Ensayo de Materiales , Diseño de Aparato Ortodóncico , Alambres para Ortodoncia , Acero Inoxidable , Propiedades de Superficie
17.
Artículo en Inglés | MEDLINE | ID: mdl-33339137

RESUMEN

BACKGROUND: The occurrence of an orofacial trauma can originate health, social, economic and professional problems. A 13-year boy suffered the avulsion of tooth 11 and 21, lost at the scenario. METHODS: Three intraoral appliances were manufactured: A Hawley appliance with a central expansion screw and two central incisors (1), trumpet edentulous anterior tooth appliance (2) and a customized splint (3) were designed as part of the rehabilitation procedure. Objectively assessing the sound quality of the trumpet player with these new devices in terms of its spectral, temporal, and spectro-temporal audio properties. A linear frequency response microphone was adopted for precision measurement of pitch, loudness, and timbre descriptors. RESULTS: Pitch deviations may result from the different intra-oral appliances due to the alteration of the mouth cavity, respectively, the area occupied and modification/interaction with the anatomy. This investigation supports the findings that the intra-oral appliance which occupies less volume is the best solution in terms of sound quality. CONCLUSIONS: Young wind instrumentalists should have dental impressions of their teeth made, so their dentist has the most reliable anatomy of the natural teeth in case of an orofacial trauma. Likewise, the registration of their sound quality should be done regularly to have standard parameters for comparison.


Asunto(s)
Incisivo/lesiones , Ortodoncia , Avulsión de Diente/rehabilitación , Adolescente , Humanos , Masculino , Maxilar , Boca/anatomía & histología , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos , Radiografía Panorámica , Diente , Avulsión de Diente/diagnóstico por imagen , Avulsión de Diente/terapia
18.
Ned Tijdschr Tandheelkd ; 127(12): 713-718, 2020 Dec.
Artículo en Holandés | MEDLINE | ID: mdl-33367299

RESUMEN

Retention plays an important part during orthodontic treatment. Orthodontic treatment can be divided into 2 phases: an active phase in which treatment is carried out with orthodontic appliances and a second, passive phase with retention, with which an attempt is made to prevent a return to the original or another position. In practice, fixed retainers with a retention wire are usually chosen because of the many advantages of such wires. Even though fixed retention is now the gold standard in orthodontic follow-up, it does fail fairly often. In particular, because the procedures for manufacturing and placing are technically sensitive. A number of studies report that on average 34.9% (range of 10.3-47%) of the bonded retention wires come loose after an average of 2 years. A number of factors play a part in this. Based on the literature, it is possible to make some practical recommendations on the lifespan of a retainer.


Asunto(s)
Recubrimiento Dental Adhesivo , Retenedores Ortodóncicos , Humanos , Diseño de Aparato Ortodóncico
19.
Ned Tijdschr Tandheelkd ; 127(12): 719-726, 2020 Dec.
Artículo en Holandés | MEDLINE | ID: mdl-33367300

RESUMEN

The aim of orthodontic retention is to counteract post-treatment changes and thereby to preserve the result of active treatment. For active orthodontic treatment, a certain level of patient compliance is necessary and the same applies for the retention phase. Ideally, the retainer will never fail or get lost, the patient will adhere to all recommendations and will wear the retainer in accordance with the instructions, necessary precautions with the fixed retainer are followed, the patient reports a problem immediately, and appointments for retention check-ups will always be met. Unfortunately, the reality is often different. This article considers the need to provide the patient with information about retention before treatment and the problems that may arise during the retention phase. Recommendations are made on how to avoid these problems as much as possible, and solutions are offered for problems that do arise. Finally, it is made clear how the orthodontist, patient and dentist can be jointly responsible for the retention phase.


Asunto(s)
Retenedores Ortodóncicos , Ortodoncistas , Citas y Horarios , Humanos , Diseño de Aparato Ortodóncico , Cooperación del Paciente
20.
Ned Tijdschr Tandheelkd ; 127(12): 727-733, 2020 Dec.
Artículo en Holandés | MEDLINE | ID: mdl-33367301

RESUMEN

In general, the result of orthodontic treatment is not stable. After active treatment, changes can occur as a result of a number of biological processes. The application of retention aims to counteract such changes and thereby preserve the result of orthodontic treatment. The way practitioners design the retention phase varies considerably. To reduce undesired variation in orthodontic retention between practices and to improve quality of care, clinical practice guidelines for retention were developed by the Dutch Association of Orthodontists. These guidelines contain recommendations for the application of retention. The duration of retention, additional techniques and retention after treatment of Class II malocclusions are discussed; consensus has not yet been reached on these subjects.


Asunto(s)
Fenómenos Biológicos , Pautas de la Práctica en Odontología , Atención Odontológica , Humanos , Diseño de Aparato Ortodóncico , Ortodoncistas
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