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1.
Sensors (Basel) ; 21(11)2021 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-34070904

RESUMO

The orthodontic miniscrew is driven into bone in a clockwise direction. Counter-clockwise rotational force applied to the implanted miniscrew can degrade the stability. The purpose of this three-dimensional finite element study was to figure out the effect of shifting the miniscrew head hole position from the long axis. Two miniscrew models were developed, one with the head hole at the long axis and the other with an eccentric hole position. One degree of counter-clockwise rotation was applied to both groups, and the maximum Von-Mises stress and moment was measured under various wire insertion angles from -60° to +60°. All Von-Mises stress and moments increased with an increase in rotational angle or wire insertion angle. The increasing slope of moment in the eccentric hole group was significantly higher than that in the centric hole group. Although the maximum Von-Mises stress was higher in the eccentric hole group, the distribution of stress was not very different from the centric hole group. As the positive wire insertion angles generated a higher moment under a counter-clockwise rotational force, it is recommended to place the head hole considering the implanting direction of the miniscrew. Clinically, multidirectional and higher forces can be applied to the miniscrew with an eccentric head hole position.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Parafusos Ósseos , Análise de Elementos Finitos , Fenômenos Mecânicos , Estresse Mecânico
2.
J Contemp Dent Pract ; 22(1): 84-88, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-34002715

RESUMO

AIM: The aim of this study was to assess the insertion torque of the mini-implant used in orthodontic patients and to assess the correlation between the insertion torque, primary stability, and perception of pain in patients undergoing orthodontic therapy with mini-implant-augmented anchorage. MATERIAL AND METHODS: Among the patients undergoing orthodontic therapy, 31 samples who required mini-implant for anchorage purpose were selected. A total of 59 mini-implants were placed in these patients. This included interradicular mini-implants and extra-alveolar mini-screws. Immediately after placement, the insertion torque in all these was measured using a digital torque meter and primary stability was assessed by identifying any mobility of the implant placed. Primary stability was noted at two time intervals immediate post-placement and 1 week after that. All the mini-implants that were considered in this study were immediately loaded. Patients were asked to record any pain experienced on the visual analog scale (VAS) score sheet at 24 hours and 1 week post-placement. RESULTS: Among the mini-implants placed, those with 2 mm diameter needed higher placement torque, i.e., infrazygomatic crest mini-implants and buccal shelf mini-implants were placed with average placement torque of 10.08 and 10.25 N cm, respectively. Extra-alveolar screws caused more pain, especially higher in the mandible than the maxilla. Decrease in pain scores was noted from T0 to T1 in almost all the cases. CONCLUSION: Thicker mini-implant needed more insertion torque and highest insertion torque was recorded with extra-alveolar screws. No direct correlation could be obtained with the pain levels experienced by the patients and with the primary stability of the mini-implants. CLINICAL SIGNIFICANCE: Mini-implants placed with an insertion torque above the recommended range tend to fail and break more often. Patients placed with extra-alveolar bone screws reported more pain than that of the smaller-dimension mini-implant.


Assuntos
Implantes Dentários , Procedimentos de Ancoragem Ortodôntica , Implantes Dentários/efeitos adversos , Humanos , Mandíbula , Dor , Torque
3.
Am J Orthod Dentofacial Orthop ; 159(6): 852-865.e5, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33906776

RESUMO

A 13-year-old growing female patient presented with hemimandibular hyperplasia of the right side, Class III hypodivergent skeletal pattern, and severe facial asymmetry. Corrective surgery was deferred until her growth had been completed. When the patient was 16 years old, a low condylectomy was performed on the hyperplastic side of her mandible to prevent its progressive condylar hyperplasia, while simultaneous orthodontic camouflage treatment was performed with the intrusion of the maxillary right posterior teeth using temporary skeletal anchorage devices without additional orthognathic surgery. A low condylectomy caused anterior and lateral open bite after the downward and backward movement of the chin, which improved Class III appearance. The intrusion of the maxillary right posterior teeth followed by compensating extrusion of the mandibular posterior teeth contributed to improve the patient's facial asymmetry with correction of the transverse occlusal plane and lip canting. After 30 months of treatment, an acceptable esthetic outcome and functional occlusion were achieved. The treatment results were well maintained for 1-year retention.


Assuntos
Mordida Aberta , Procedimentos de Ancoragem Ortodôntica , Adolescente , Cefalometria , Estética Dentária , Assimetria Facial/diagnóstico por imagem , Assimetria Facial/cirurgia , Feminino , Humanos , Hiperplasia , Mandíbula/diagnóstico por imagem , Mandíbula/cirurgia , Técnicas de Movimentação Dentária , Resultado do Tratamento
4.
Orthod Fr ; 92(1): 17-28, 2021 Mar 01.
Artigo em Francês | MEDLINE | ID: mdl-33871368

RESUMO

The aesthetic and functional success of mandibular advancement surgery often depends on the quality of the orthodontic preparation that preceded it. In order to be optimal, this preparation must try to reproduce a class II malocclusion equivalent to the sagittal skeletal discrepancy, to allow a surgical procedure of sufficient amplitude. The aim of this article is to present, thanks to a clinical case, a new mandibular posterior anchorage device, called Abalakov, used in the context of these preparations. The modalities of placement and use of this simple osteosynthesis wire, placed in the anterior part of the ramus, are exposed step by step, until the final result is obtained. The advantages and effectiveness of the technique are then discussed and compared with other treatment alternatives. It can be concluded that this new device is a simple, comfortable, inexpensive and above all reproducible and highly effective means of distalization of the mandibular arch, with clear uprighting of the incisors.


Assuntos
Má Oclusão Classe II de Angle , Procedimentos de Ancoragem Ortodôntica , Cefalometria , Estética Dentária , Humanos , Incisivo , Má Oclusão Classe II de Angle/terapia , Mandíbula
6.
Sensors (Basel) ; 21(6)2021 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-33799632

RESUMO

High orthodontic forces and various directions of applied forces can be associated with loosening of the screw anchorage in the bone. Screw designs have been modified to increase the stability of the miniscrews. This research evaluates the influence of three-designs on the stability of orthodontic miniscrews. A conventionally cylinder-type miniscrew design (Bio-Action screw, Jin-Biomed co., Bucheon, Korea) was set as a control, and three conditions were studied based on modifications of this control design. Condition-1 has narrowed threads in the upper part of the screw; Condition-2 has a notch at the middle part; and Condition-3 has the combination of Condition-1 and Condition-2. The moment required to unwind the miniscrew to five degrees is tested, and the moment generated at the cortical bone and the trabecular bone were calculated with finite element analysis. Compared to the control, all three conditions showed a higher moment required to unwind the miniscrew and a higher moment generated at the cortical bone. At the trabecular bone, condition-2 and -3 showed higher moment than the control, and condition-1 showed similar moment to the control. Condition-3 required a higher overall moment to unwind the miniscrew. These findings validate the design modifications used to increase the rotational resistance.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Parafusos Ósseos , Análise de Elementos Finitos , República da Coreia , Titânio
7.
Am J Orthod Dentofacial Orthop ; 159(6): e473-e481, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33771431

RESUMO

Rarely is the extraction of the four first molars the ideal choice in the course of orthodontic treatment, particularly in older patients. Although this approach can offer distinct advantages in carefully selected patients, it is also associated with a number of well-recognized problems, including the extension of treatment times, anchorage management, and control of second molars during space closure. However, by careful use of contemporary materials and techniques, a high standard of treatment can be achieved, even in patients with complex malocclusions. This is illustrated in a report of a case that highlights both the challenges and some of the solutions this treatment modality can offer.


Assuntos
Má Oclusão , Procedimentos de Ancoragem Ortodôntica , Idoso , Humanos , Dente Molar/diagnóstico por imagem , Fechamento de Espaço Ortodôntico , Técnicas de Movimentação Dentária
8.
Prog Orthod ; 22(1): 9, 2021 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-33748887

RESUMO

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.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Aço Inoxidável , Ligas , Humanos , Laboratórios , Teste de Materiais , Desenho de Aparelho Ortodôntico , Estresse Mecânico , Titânio , Torque
9.
Orthod Fr ; 92(1): 129-140, 2021 Mar 01.
Artigo em Francês | MEDLINE | ID: mdl-33787498

RESUMO

The objective of this case series was to show how only one miniscrew can be used to treat simultaneously or successively canine impaction and different malocclusions. Three patients aged of 13 years old who had malocclusions, such as Class II, overbite and canine impaction, were each one treated with the same miniscrew throughout the treatment period. Palatal miniscrews were placed mesially to the first molar and used as a direct or indirect anchorage depending on the moment of the treatment. In each case, satisfactory treatment was obtained with correction of overbite, class II malocclusion and canine impaction. The first steps of treatment were aesthetic for the patient and did not require patient cooperation.


Assuntos
Má Oclusão Classe II de Angle , Procedimentos de Ancoragem Ortodôntica , Adolescente , Idoso , Parafusos Ósseos , Cefalometria , Estética Dentária , Humanos , Má Oclusão Classe II de Angle/terapia , Técnicas de Movimentação Dentária
11.
Dental Press J Orthod ; 26(1): e2119204, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33759963

RESUMO

OBJECTIVE: Evaluate the height, thickness and cortical density of the palatal bone of adults with different vertical facial patterns using Cone-Beam Computed Tomography (CBCT). METHODS: This study analyzed 75 CBCTs of patients between 18 and 35 years old (45 men and 30 women). The CBCTs were classified into three groups based on their facial pattern: normodivergent, hypodivergent and hyperdivergent as determined from lateral cephalograms synthesized from the CBCTs. The height, cortical thickness and cortical density of the palatal bone were measured at 4, 8, 12, 16 and 20mm posterior to the incisive foramen, and at 3, 6 and 9mm lateral to the midpalatal suture. ANOVA with Tukey post-hoc tests were used for analysis of the data, at significance level of p< 0.05. RESULTS: The hypodivergent pattern had a significant difference and the greatest height and cortical thickness of the palatal bone, followed by the hyperdivergent and the normodivergent patterns. No significant differences were found in minimum and maximum values of cortical density. CONCLUSION: The palatal bone is a favorable anatomical area to install different orthodontic temporary anchorage devices (TADs), where individuals with the hypodivergent vertical facial pattern have a higher height and cortical thickness of the palatal bone, followed by the hyperdivergent pattern and finally the normodivergent pattern. No significant differences in the cortical density of the palatal bone in the three facial patterns were found.


Assuntos
Implantes Dentários , Procedimentos de Ancoragem Ortodôntica , Adolescente , Adulto , Tomografia Computadorizada de Feixe Cônico , Face , Feminino , Humanos , Masculino , Palato/diagnóstico por imagem , Palato/cirurgia , Adulto Jovem
12.
Dental Press J Orthod ; 26(1): e211967, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33759966

RESUMO

OBJECTIVE: Assess the influence of mono- and bicortical anchorage and diameter of mini-implants (MIs) on the primary stability of these devices. METHODS: 60 self-drilling MIs were distributed in six groups according to diameter (1.5mm, 1.8mm or 2.0mm) and type of anchorage (monocortical and bicortical) in bovine rib. The primary stability was evaluated by insertion torque, micromobility and pull-out strength tests. ANOVA and/or Tukey analysis were used to conduct intergroup comparisons (p< 0.05). Non-parametric statistics (Kruskal-Wallis and Mann-Whitney) were performed when normality was not found (p< 0.05). RESULTS: MIs with larger diameters and bicortical anchorage showed greater primary stability regarding insertion torque (p< 0.05) and micromobility (p< 0.05). Only MI diameter had an effect on the pull-out strength test. Larger diameter MIs presented better retention in pull-out strength tests (p< 0.001), regardless of mono- or bicortical anchorage. CONCLUSIONS: MI primary stability is dependent on its diameter and type of anchorage. Bicortical anchorage showed greater stability when compared with monocortical anchorage, independently of other variables.


Assuntos
Implantes Dentários , Procedimentos de Ancoragem Ortodôntica , Animais , Bovinos , Técnica de Expansão Palatina , Palato , Torque
13.
Dental Press J Orthod ; 26(1): e2119155, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33759962

RESUMO

INTRODUCTION: Shorter miniscrew implants (MSIs) are needed to make orthodontics more effective and efficient. OBJECTIVE: To evaluate the stability, insertion torque, removal torque and pain associated with 3 mm long MSIs placed in humans by a novice clinician. METHODS: 82 MSIs were placed in the buccal maxillae of 26 adults. Pairs of adjacent implants were immediately loaded with 100g. Subjects were recalled after 1, 3, 5, and 8 weeks to verify stability and complete questionnaires pertaining to MSI-related pain and discomfort. RESULTS: The overall failure rate was 32.9%. The anterior and posterior MSIs failed 35.7% and 30.0% of the time, respectively. Excluding the 10 MSIs (12.2%) that were traumatically dislodged, the failure rates in the anterior and posterior sites were 30.1% and 15.2%, respectively; the overall primary failure rate was 23.6%. Failures were significantly (p= 0.010) greater (46.3% vs 19.5%) among the first 41 MSIs than the last 41 MSIs that were placed. Excluding the traumatically lost MSIs, the failures occurred on or before day 42. Subjects experienced very low pain (2.2% of maximum) and discomfort (5.5% of maximum) during the first week only. CONCLUSIONS: Shorter 3 mm MSIs placed by a novice operator are highly likely to fail. However, failure rates can be substantially decreased over time with the placement of more MSIs. Pain and discomfort experienced after placing 3 mm MSIs is minimal and temporary.


Assuntos
Implantes Dentários , Procedimentos de Ancoragem Ortodôntica , Adulto , Parafusos Ósseos , Implantação Dentária Endo-Óssea , Implantes Dentários/efeitos adversos , Prótese Dentária Fixada por Implante , Estudos de Viabilidade , Humanos , Maxila/cirurgia , Torque
14.
BMC Oral Health ; 21(1): 87, 2021 02 25.
Artigo em Inglês | MEDLINE | ID: mdl-33632190

RESUMO

BACKGROUND: The aim of this study is to compare the biomechanical effects of the conventional 0.019 × 0.025-in stainless steel archwire with the dual-section archwire when en-masse retraction is performed with sliding mechanics and skeletal anchorage. METHODS: Models of maxillary dentition equipped with the 0.019 × 0.025-in archwire and the dual-section archwire, whose anterior portion is 0.021 × 0.025-in and posterior portion is 0.018 × 0.025-in were constructed. Then, long-term tooth movement during en-masse retraction was simulated using the finite element method. Power arms of 8, 10, 12 and 14 mm length were employed to control anterior torque, and retraction forces of 2 N were applied with a direct skeletal anchorage. RESULTS: For achieving bodily movement of the incisors, power arms longer than 14 mm were required for the 0.019 × 0.025-in archwire, while between 8 and 10 mm for the dual-section archwire. The longer the power arms, the greater the counter-clockwise rotation of the occlusal plane was produced. Frictional resistance generated between the archwire and brackets and tubes on the posterior teeth was smaller than 5% of the retraction force of 2 N. CONCLUSIONS: The use of dual-section archwire might bring some biomechanical advantages as it allows to apply retraction force at a considerable lower height, and with a reduced occlusal plane rotation, compared to the conventional archwire. Clinical studies are needed to confirm the present results.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Fios Ortodônticos , Fenômenos Biomecânicos , Análise de Elementos Finitos , Humanos , Técnicas de Movimentação Dentária
15.
Am J Orthod Dentofacial Orthop ; 159(4): 460-469, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33526299

RESUMO

INTRODUCTION: To investigate the anatomy of the posterior palatal alveolar process, which is often used for placement of the orthodontic mini-implant (OMI), and to suggest simple guidelines for safe placement of OMI. METHODS: Cone-beam computed tomography (CBCT) scans of 60 patients (30 men, 30 women; age range, 18-39 years; average age, 25.8 years) was used to measure the palatal interradicular distance, the palatal bone thickness, and the palatal soft-tissue thickness. Measurements were performed on the area from the maxillary canine to the maxillary second molar based on the vertical distance apical from the cementoenamel junction. The CBCT data were analyzed by Bonferroni correction for multiple testing and the multivariable mixed linear model. RESULTS: The palatal interradicular distance was the widest between the second premolar and the first molar and the narrowest between the first and second premolars. The palatal bone thickness at interdental sites was the thickest between the first and second premolars and the thinnest between the first and second molars. The interdental palatal soft-tissue thickness from the canine to the second premolar was thicker than any other area. There were minor measurement differences between genders and positive correlations between vertical distance from the cementoenamel junction plane and all of the parameters. CONCLUSION: In this study, we evaluated the anatomy of the posterior palatal area using CBCT scans of adult patients. The data will provide guidelines to the clinicians before OMI placement in the posterior palatal alveolar process.


Assuntos
Implantes Dentários , Procedimentos de Ancoragem Ortodôntica , Adolescente , Adulto , Processo Alveolar/diagnóstico por imagem , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Masculino , Maxila , Raiz Dentária , Adulto Jovem
16.
Orthod Craniofac Res ; 24 Suppl 1: 103-112, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33484608

RESUMO

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.


Assuntos
Má Oclusão Classe II de Angle , Procedimentos de Ancoragem Ortodôntica , Cefalometria , Humanos , Maxila , Dente Molar , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Técnicas de Movimentação Dentária
18.
Prog Orthod ; 22(1): 2, 2021 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-33409700

RESUMO

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.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Parafusos Ósseos , Humanos , Boca , Desenho de Aparelho Ortodôntico , Taxa de Sobrevida , Torque
19.
Am J Orthod Dentofacial Orthop ; 159(4): 522-535, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33485716

RESUMO

Class III malocclusion presents some complexity in terms of diagnosis and treatment and affects not only the jaws but the whole craniofacial complex. Besides, functional forward displacement of the mandible may be diagnosed in a patient presenting Class III malocclusion, as the 2 entities are not incompatible or mutually exclusive. This case report describes the multidisciplinary, nonsurgical, orthodontic treatment of an adult patient with a skeletal Class III malocclusion, anterior crossbite, and a palatally impacted canine, treated with fixed appliances and skeletal anchorage. To upright the mandibular molars, distalize the whole mandibular arch, and avoid excessive inclination of maxillary incisors to improve dentofacial esthetics, miniscrews were placed in the retromolar area. The treatment results were very satisfactory and remained stable after a reasonable retention period.


Assuntos
Má Oclusão Classe III de Angle , Má Oclusão , Procedimentos de Ancoragem Ortodôntica , Adulto , Cefalometria , Estética Dentária , Humanos , Má Oclusão Classe III de Angle/diagnóstico por imagem , Má Oclusão Classe III de Angle/terapia , Técnicas de Movimentação Dentária
20.
Angle Orthod ; 91(3): 363-370, 2021 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-33461218

RESUMO

OBJECTIVES: To investigate the relationship between the use of social networking sites (SNSs) on patient perceptions, acceptance, and expectations of treatment using temporary anchorage devices (TADs) and to compare differences between patients from the United Kingdom and Brazil. MATERIALS AND METHODS: Cross-sectional questionnaires were administered to 39 participants at orthodontic practices in the United Kingdom and Brazil about patients' use of SNSs, exposure to TADs on SNSs, and thoughts on extractions, jaw surgery, or TADs as treatment options. RESULTS: UK patients prefer for clinicians to have SNS profiles (P = .022). Most UK and Brazilian patients want to see their clinician's work online (76.7%) and use SNSs to get information about treatment options (76.6%). There was a statistically significant difference in Brazilian patients' acceptance of TADs as a treatment option compared with UK patients, particularly if it meant avoiding extractions (P = .002), avoiding jaw surgery (P = .004), or reducing treatment time (P = .010). Knowledge of TADs was greater in Brazilian patients (P < .001). CONCLUSIONS: Patients use SNSs to obtain information about treatments and prefer clinicians to have social media accounts. Patients exposed to TADs on SNSs are more likely to accept them as an orthodontic treatment option. UK patients have less knowledge of TADs and are therefore less sure to consider TADs as an option. Brazilian patients are more confident in considering the use of TADs. Clinicians should consider increasing their social media presence to accommodate patients' expectations and acceptance of TADs.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Mídias Sociais , Brasil , Estudos Transversais , Humanos , Desenho de Aparelho Ortodôntico , Reino Unido
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