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1.
Am J Orthod Dentofacial Orthop ; 158(3): 410-419, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32773142

RESUMEN

INTRODUCTION: Impacted maxillary canine-linked severe lateral incisor root resorption (SIRRc) is rare, but it greatly influences the survival of the affected teeth. Our study was designed to investigate the risk factors for SIRRc. METHODS: Eighty-two patients with SIRRc and 81 patients with impacted maxillary canines but without SIRRc were included and evaluated by cone-beam computed tomography in software programs by 1 examiner (H.W.). Age, sex, positions, and dental follicles and angular inclinations of impacted canines were measured in this study. Binary logistic regression was used to analyze the risk factors for SIRRc. RESULTS: SIRRc was highly related to sex, vertical and mesiodistal position, dental follicles sizes of canines, and intersection angles in 3 dimensions. The regression analysis showed female sex, dental follicles between 1 mm and 3 mm, mesial third and apical third position, vertical angle smaller than 30°, and the relative angle between 30° and 60° were significant risk factors for SIRRc. CONCLUSIONS: Early diagnosis and treatment for SIRRc are imperative, especially in Asian patients that are female with apically and mesially positioned canines as well as wider dental follicles. Vertical angles and relative angles of impacted canines should also be noticed.


Asunto(s)
Resorción Radicular , Diente Impactado , Tomografía Computarizada de Haz Cónico , Diente Canino , Femenino , Humanos , Incisivo , Maxilar , Factores de Riesgo
2.
J Dent Child (Chic) ; 87(2): 60-68, 2020 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-32787998

RESUMEN

Purpose: Although rapid maxillary expansion (RME), transpalatal arch (TPA) and cervical-pull headgear (HG) have been suggested for the interception of palatally displaced permanent canines (PDCs), existing knowledge remains inconclusive. The purpose of this study was to assess these practices in an evidence-based manner.
Methods: Randomized controlled trials (RCTs) investigating the prevalence of physiologic PDC eruption after using RME, TPA and HG, with or without the extraction of the primary canines, were searched, and the risk of bias was assessed.
Results: Data from five RCTs were included. RME, TPA and HG, with or without extracting primary canines, can significantly increase the rate of normal eruption of PDCs compared to no intervention (risk ratio [RR] = 2.5 to 4.5). In comparison to extraction, no difference was observed, except for HG combined with primary canine extraction (RR = 1.413; 95 percent confidence interval = 1.062 to 1.880).
Conclusion: RME, TPA and HG can significantly increase the rate of normal eruption of PDC compared to no intervention. However, when compared to extraction, no differences were noted, except for HG combined with primary canine extraction.


Asunto(s)
Erupción Ectópica de Dientes , Diente Canino , Humanos , Maxilar , Ortodoncia Interceptiva , Extracción Dental , Diente Primario
3.
Indian J Dent Res ; 31(3): 408-413, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32769275

RESUMEN

Aim: The aim of this study was to find a correlation between the permanent maxillary canine eruption and the cervical vertebral maturation index (CVMI). Materials and Methods: 145 subjects (73 male and 72 female) in the age of 7-14 years were examined radiographically with lateral cephalographs and orthopantomographs. The CVM patterns were evaluated on the lateral cephalograph using the classification of Hassel and Farman. The stage of the permanent maxillary canine eruption has been investigated on the orthopantomographs depending on its vertical height in relation to the adjacent incisor. Descriptive statistics were obtained for both CVMI stages and canine eruption grading. Spearman rank correlation test was used to determine the correlation between both methods. The minimum level of significance was considered less than 0.05 (P < 0.05). Results: Results showed a strong correlation between CVMI and the grading of the maxillary canine eruption in both female and male and the (r) value estimated was 0.862 and 0.758, respectively. Over 90% of deceleration stage of CVMI in both genders show canine eruption (pubertal growth spurt) about 91.66% for female and 95.65% for male and a small percentage of delay eruption 8.33% and 4.35% in female and male gender, respectively, with a predilection to the female gender. Conclusions: A significant correlation between the permanent maxillary canine eruption stages and skeletal maturity was found. The eruption of maxillary canine occurs before the end of pubertal growth. Any delay in the eruption of maxillary canine after the deceleration stage of CVMI, suggesting a chance of impaction.


Asunto(s)
Determinación de la Edad por el Esqueleto , Erupción Dental , Cefalometría , Diente Canino/diagnóstico por imagen , Femenino , Masculino , Maxilar , Radiografía Panorámica
4.
Am J Orthod Dentofacial Orthop ; 158(3): 391-399, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32653347

RESUMEN

INTRODUCTION: Enameloplasty of maxillary canines is often needed for aesthetic substitution in patients with congenitally missing lateral incisors. The exact enamel thicknesses for the various canine surfaces are unknown because previous studies failed to employ accurate measurement tools to report and compare detailed enamel thicknesses for each surface at various crown heights. METHODS: Thirty-two extracted maxillary canines were collected and scanned in a microcomputed tomography scanner. The scans were imported into a custom-written MATLAB software (version 9.2; MathWorks, Natick, Mass) and the enamel thickness on the mesial, distal, labial, fossa, cingulum, and incisal edge of each tooth was computed, obtaining the mean value from slices at 0.1 mm intervals. The overall mean enamel thickness for each surface was also calculated, and these values were compared using paired t tests. Incisal wear stage and incisal enamel thickness that was measured were compared using Spearman rank correlation coefficient. RESULTS: The mean enamel thickness was significantly thinner at the gingival level when compared with the incisal for all surfaces that were analyzed (1-tailed, P <0.001). The mean enamel coverage at the mesial was significantly thinner than the distal when measured gingival to the widest mesiodistal area. The mean enamel coverage of the cingulum was particularly thin and therefore requires extreme care in reshaping it. Incisal edge enamel thickness was highly negatively correlated with the wear stage of the scoring system that was used (1-tailed, P <0.001). CONCLUSIONS: The enamel coverage of the maxillary canine varies depending on the tooth surface and the incisogingival measurement location.


Asunto(s)
Diente Canino , Estética Dental , Esmalte Dental , Humanos , Maxilar , Odontometría , Microtomografía por Rayos X
6.
Minerva Stomatol ; 69(3): 159-164, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32610724

RESUMEN

BACKGROUND: An observational case-control study was designed to retrospectively assess the association among sex, skeletal and dental variables and the and the palatal maxillary canine impaction. METHODS: The STROBE guidelines were followed. The records of 2195 subjects were analyzed. The data records of subjects with palatally displaced canine (PDC) were compared with the data of randomly selected subjects without PDC. Descriptive statistics, logistic regression model and χ2 test were used. RESULTS: One hundred and one subjects presented at least one PDC; 106 subjects without PDC were randomly selected. From the logistic model, it was found that only gender and persistence of the deciduous canine were significantly associated with PDC. The Chi-square test showed a correlation between the presence of upper lateral incisor anomalies and PDC, otherwise, considering the unilateral impaction, there was no statistically significant difference in the relationship between canine impaction and the presence of the lateral incisor anomalies, on the same or opposite side of the impaction. CONCLUSIONS: The female sex and the persistence of maxillary deciduous canines are associated with PDC. The anomalies of the lateral incisor do not seem to play a mechanistic role, but could rather represent a genetic variable of the canine eruption disorder.


Asunto(s)
Incisivo , Diente Impactado , Estudios de Casos y Controles , Diente Canino , Femenino , Humanos , Maxilar , Estudios Retrospectivos
7.
Am J Orthod Dentofacial Orthop ; 158(1): 102-113, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32600747

RESUMEN

Treatment for a patient with a dental anomaly pattern is challenging and complex. This article presents a rare case with an association of multiple ectopic eruptions treated in 2 phases. An 8-year-old boy in the early mixed dentition showed a Class II, Division 2 malocclusion, and an ectopic eruption of the mandibular right lateral incisor. The treatment plan included extractions of the deciduous mandibular right lateral incisor and canine, followed by partial mandibular fixed appliances and a lingual arch. In the late mixed dentition, the panoramic radiograph showed bilateral ectopic eruptions of the maxillary canines. The deciduous maxillary canines were extracted, and a cervical headgear was installed. Within 12 months, both permanent maxillary canines spontaneously erupted. Comprehensive orthodontic treatment was initiated when the patient was aged 13 years to level the curve of Spee and reduce the overbite. Phase 2 lasted 15 months. In patients with dental anomaly patterns, longitudinal follow-up during the mixed dentition is highly important and might contribute to simplifying comprehensive orthodontic treatment and reducing complications and adverse effects.


Asunto(s)
Maloclusión de Angle Clase II , Maxilar , Adolescente , Niño , Diente Canino , Dentición Mixta , Humanos , Incisivo , Masculino
8.
Am J Orthod Dentofacial Orthop ; 158(2): 182-191, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32591274

RESUMEN

INTRODUCTION: The objective of this study was to evaluate the distalization rate and changes in inclination of the maxillary canines in alveoli preserved with leukocyte-platelet-rich fibrin (L-PRF) membranes in adult patients. The null hypothesis was that there are no differences in the canine distalization movement rate between the treated and the control sides. METHODS: A total of 21 healthy adult patients with a minimum age of 20 years (mean age, 33 ± 5.9 years) and Angle Class I or Class II Division 1 malocclusion, who had an indication of extraction of the maxillary first premolars and orthodontic distalization of the maxillary canines were included in this study. A randomized controlled clinical split-mouth trial was conducted; the experimental maxillary side was treated with L-PRF membranes, and the other side served as the control. A randomization sequence of the experimental sides among patients was generated using the random number generation function of Microsoft Excel. Neither the patients nor the operators were blinded. Fifteen days after the extractions, distalization was initiated using an elastic chain applying 150 g of force to the canines on a 0.020-in stainless steel archwire. The distalization rate was the main outcome of the study, and it was assessed monthly for 5 months through the intraoral use of a flexible ruler. The degree of inclination of the canines was the secondary outcome, and it was evaluated through cone-beam computed tomography. A Shapiro-Wilk test was performed, and a Wilcoxon signed rank test was subsequently used to compare the experimental and the control group. Spearman rank correlation coefficient was calculated to evaluate the correlation between distalization and inclination for each side. RESULTS: Four of the subjects dropped out of the study, leaving a total of 17 patients (n = 17). The distalization rate and inclination of the canines were greater on the control side than on the side treated with L-PRF (P <0.05). A weak correlation was found between the distalization rate and inclination of the canines for both sides (control side, ρ = 0.17; experimental, ρ = 0.11). No harm was observed during the study. CONCLUSIONS: The null hypothesis was rejected. The use of L-PRF in young adult patients decreased the rate of distalization and changes in inclination of the maxillary canines compared with the control group. REGISTRATION: This trial was not registered. PROTOCOL: The protocol was not published before trial commencement.


Asunto(s)
Leucocitos , Adulto , Diente Canino , Humanos , Boca , Fibrina Rica en Plaquetas , Técnicas de Movimiento Dental
9.
Braz Oral Res ; 34: e051, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32578761

RESUMEN

The aim of this study was to verify the precision and applicability of two methods of age estimation, Kvaal's and Cameriere's methods, among Brazilian adults. A sample composed of periapical radiographs of canine teeth belonging to 320 Brazilian adults was analyzed, divided into groups according to sex (male and female) and age group (20-29 years, 30-39 years, 40-49 years and 50-59 years). Kvaal's method presented better results when compared to the results of Cameriere's method in the general evaluation of each canine tooth, except for the upper left canine (tooth 23), which presented a mean error (ME) with no statistically significant difference between the methods (Kvaal: ME = 7.43, p = 0.4991, Cameriere: ME = 7.55, p = 0.6982). In the evaluation by age groups, Kvaal's method presented a lower variation between the real age and estimated age when applied to the age groups of 20-29 years and 30-39 years compared to the results provided by Cameriere's method. With respect to the groups aged 40 to 49 years and 50 to 59 years, Cameriere's method presented better performance than the results provided by Kvaal's method. The methods of estimating age proposed by Kvaal and Cameriere are simple and nondestructive and have demonstrated reproducibility and reliability. The Kvaal method was more accurate for the age groups of 20-29 and 30-39 years, and for those over 40 years, the Cameriere method was the most accurate.


Asunto(s)
Determinación de la Edad por los Dientes/métodos , Adulto , Factores de Edad , Brasil , Diente Canino/anatomía & histología , Diente Canino/diagnóstico por imagen , Femenino , Odontología Forense/métodos , Humanos , Masculino , Persona de Mediana Edad , Radiografía Dental Digital/métodos , Estándares de Referencia , Reproducibilidad de los Resultados
10.
J Orofac Orthop ; 81(5): 371-381, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32472340

RESUMEN

AIM: The aim of this study was to evaluate the occlusal force distribution (OFD), individual tooth force (ITF), and occlusal surface area (OSA) of Essix and Hawley retainers, using T­Scan III (Tekscan Inc., South Boston, MA, USA) analysis. MATERIALS AND METHODS: A total of 35 subjects were randomly assigned to one of the retention groups following fixed orthodontic treatment. While 18 of these subjects were provided with Essix retainers, 17 were given Hawley retainers. Computerized occlusal analysis of the patients' dentitions was performed using T­Scan III. The evaluations were made after debonding (T0) and at month 3 (T1), month 6 (T2) and 1 year (T3) after the retention phase. RESULTS: The changes in OFD were significant only in the Hawley group for the left/right half jaws and the right posterior quadrants when comparing the T2-T3 time interval. Also, the differences between the groups were significant only for the left half jaw for the T0-T2 time interval and for the right half jaw when comparing the T0-T2 and the T2-T3 time intervals. The changes in ITF were insignificant within groups, but significant between the groups for tooth 11 and 22. Although there was an increase observed in OSA for both groups, the difference between the groups was insignificant. However, the OSA increase in the Essix group for the left/right anterior quadrants was significant only for the T0-T2 and the T0-T3 time intervals, while in both groups, for the posterior left quadrant, the OSA was insignificant only for the T0-T1 time interval. CONCLUSIONS: Although OSA increased when using both retention appliances, OFD did not change.


Asunto(s)
Diseño de Aparato Ortodóncico , Retenedores Ortodóncicos , Fuerza de la Mordida , Diente Canino , Humanos
11.
J Orthod ; 47(3): 251-256, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32419572

RESUMEN

Dense bone islands (DBIs) are usually asymptomatic and do not require any treatment. This case report presents a DBI of an unusual presentation, which was an incidental finding on a radiograph of a 15-year-old orthodontic patient. The DBI lesion was 24 mm in size, occupying at least 50% of the alveolar process between the upper right canine and lateral incisor, extending up the lateral aspect of the anterior margin of the right nasal fossa. Generally, DBIs are 2-3 mm in size and more commonly found in the mandible in the molar and premolar region. This article further discusses the impact of DBIs on orthodontic treatment such as difficulty with achieving space closure and adequate root tip or torque. We also examine the potential medical implications of DBIs. This is clinically important, especially if multiple DBIs, or osteomas which have a similar radiographic appearance to DBIs, are found in a patient as they may be associated with adenomatous intestinal polyps, which, if not treated, have a 100% chance of becoming malignant transformation.


Asunto(s)
Osteoma , Adolescente , Diente Canino , Humanos , Incisivo , Islas , Mandíbula , Técnicas de Movimiento Dental
12.
Int J Esthet Dent ; 15(2): 196-210, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32467948

RESUMEN

The permanent maxillary canine is the second most frequently impacted or displaced tooth. The standard treatment for an impacted canine includes, among other things, surgical exposure and orthodontic alignment. Surgical techniques for this procedure vary depending on whether the tooth is labially or palatally impacted, while orthodontic techniques vary according to clinical judgment and experience. Autotransplantation is a treatment alternative for impacted canines with complete root formation. The success of tooth transplantation depends on the vitality of the periodontal ligament (PDL) attached to the donor tooth, and its viability decreases when it is exposed extraorally. This article reports on maxillary canine autotransplantations combined with connective tissue grafts (CTGs) and orthodontics. The recipient mesiodistal space was created orthodontically and the recipient socket was prepared using dental implant drills. Following transplantation, bone defects were grafted using guided bone regeneration (GBR). At 4 years post-transplantation, the soft tissue level was stable and periapical radiographs showed a practically normal contour of the alveolar crest around teeth 13 and 23. The two permanent canines presented no root resorption and ankylosis, and no signs of inflammation or bleeding were observed. The procedure used in this case report demonstrates that canine transplantation combined with GBR, plastic surgery procedures, and orthodontic treatment may yield acceptable and predictable esthetic results.


Asunto(s)
Ligamento Periodontal , Diente Impactado , Diente Canino , Estética Dental , Estudios de Seguimiento , Humanos , Maxilar , Trasplante Autólogo
13.
J Contemp Dent Pract ; 21(3): 326-336, 2020 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-32434983

RESUMEN

AIM: This study aimed to overview and collect the current trends and techniques in managing maxillary impacted canines by retrieving recent literature, in a chronological manner from the prevention to the very late stages of treatment in adults. BACKGROUND: We performed a review on the recent literature regarding the current trends on the management of impacted canines. We have researched various types of available articles such as clinical trials and case presentations, meta- and systematic analyses, and literature reviews focusing on clinical management of impacted canines and their outcome evaluations. We adhered to those articles published within the last decade with a focus on treatment planning for impacted and displaced canines. REVIEW RESULTS: Depending on the diagnosis and its timing of it, a maxillary impacted canine can be managed by either prevention or interception, surgical opening followed by autonomous eruption or orthodontically traction, autotransplantation, and at last by removal and space closure. These techniques are elaborated one by one according to the age and severity of the diagnosis. CONCLUSION: Impaction of the canines is a manageable abnormality which is highly dependent on the timing and localization of the displaced tooth. Early detection will give the upper hand to orthodontists to engage by either prevention through extraction of deciduous canines or intercepting via assistant devices to create more space. According to the clinical situation, open or closed surgical uncovering might be required to bond an attachment. However, generally, those techniques did not show any significant clinical distinction in the outcome assessments. CLINICAL SIGNIFICANCE: These approaches are highly technique sensitive and require collaborations with other specialties. Proper diagnosis and prognosis assessment are necessary before making any decision to bring an impacted canine in alignment.


Asunto(s)
Maxilar , Diente Impactado , Adulto , Diente Canino , Humanos , Ortodoncistas , Erupción Dental
14.
Am J Orthod Dentofacial Orthop ; 157(5): 602-610, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32354433

RESUMEN

INTRODUCTION: The aim of this study was to verify less resorption of incompletely developed roots compared with those that were fully developed during the same orthodontic treatment and to test the value of the amount of external apical root resorption for predicting tooth development. METHODS: A sample of 524 patients aged 10-15 years was selected following the inclusion criteria. For each subject, pretreatment and posttreatment digital panoramic and lateral radiographs were collected, and tooth development was determined from each radiograph. Through calculations, the amount of root resorption was assessed by a created and scientific approach for large-scale application using radiographs with only 8 measurement indexes for each patient. Other basic information and treatment parameters regarded as possible risk factors were also collected from standardized recordings or radiographs. The root length between the groups or in the single group were compared with t tests and correlation analyses. Linear univariate and multivariate regression analyses were used to test identify predictors for root resorption and to develop a prediction model. RESULTS: There was a statistically significant difference in the amount of root resorption with tooth development before correction (P <0.001) as well as after correction (P = 0.002). There was a statistically significant correlation (P <0.001) but no difference between pretreatment and posttreatment root length in the immature tooth group because of less root resorption. In the multivariate analyses, tooth development (P <0.001), treatment duration, apex horizontal movements, apex vertical movements, and previous orthodontic treatment were included in the final model as risk factors, and tooth development had the highest beta value. CONCLUSIONS: There is an association between root resorption and tooth development, and tooth development is an important predictor of root resorption. Patients with immature teeth are at a much lower risk of apical root resorption.


Asunto(s)
Resorción Radicular , Adolescente , Niño , Diente Canino , Humanos , Incisivo , Ápice del Diente , Técnicas de Movimiento Dental , Raíz del Diente
15.
Am J Orthod Dentofacial Orthop ; 157(5): 719-727, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32354444

RESUMEN

INTRODUCTION: The objective of this research was to compare the predictive value of panoramic radiographs (PRs) and cone-beam computed tomography (CBCT) scans for the estimation of root resorption, spontaneous eruption of a canine, and time for orthodontic traction. METHODS: CBCT scans and PR images of 88 patients (27 male and 61 female; aged between 11 and 44 years) with 106 palatally displaced maxillary canines were retrieved from a database. Predictive values of several radiographic parameters, including the 3-dimensional angle of the canine, were analyzed using the area under the curve and multiple regression analysis. RESULTS: The angle to the midline and canine position category had a discriminative ability for root resorption of the central incisors with area under the curve values of 0.63 (95% confidence interval, 0.56-0.79) and 0.83 (95% confidence interval, 0.75-0.91), respectively. PR measurements were not reliable predictors of resorptions, except severe resorptions, of the lateral incisors and the premolars. The measurements describing the position of the canine in relation to the midline could predict spontaneous eruption of the canine, regardless of the imaging method. The canine angle to the midline assessed on CBCT was significantly associated with traction time of the canine, producing the following equation: canine traction time = 49.6 - 0.24 × canine angle to the midline (r2 = 0.360). CONCLUSIONS: Only severe resorptions of roots can be predicted with PRs. The use of CBCT is indicated in cases of impacted canines.


Asunto(s)
Resorción Radicular , Diente Impactado , Adolescente , Adulto , Niño , Tomografía Computarizada de Haz Cónico , Diente Canino , Femenino , Humanos , Masculino , Maxilar , Radiografía Panorámica , Adulto Joven
16.
Orthod Craniofac Res ; 23(3): 351-356, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32248634

RESUMEN

OBJECTS: Palatally displaced canines (PDC) might represent condition causing several clinical problems, such as roots resorption and malocclusion, and can develop palatal canine impaction. Some interceptive treatments such as rapid maxillary expansion were suggested in order to foster maxillary canine eruption. Among expansion protocols, no data are available about differences between rapid and slow maxillary expansion on maxillary canine eruption. The aim of this study was therefore to evaluate α-angle changes in palatally displaced canines using rapid and slow maxillary expansion compared to untreated control patients. SETTING AND SAMPLE POPULATION: The final sample comprised 19 patients treated with rapid maxillary expansion (RME group), 17 treated with slow maxillary expansion (SME group) and 22 control patients (Control group). MATERIALS AND METHODS: α-angle was measured on panoramic films to detect canine inclination at the beginning, and at the end of maxillary expansion treatment or observation, time and changes over time were compared. RESULTS: In the comparisons among groups, RME group was the only group showing a decrease in α-angle measurements that was statistically significant also when compared to the other groups, except for the left side when compared to SME group. CONCLUSION: RME treatment significantly and positively affected canine position when compared to SME treatment and control group.


Asunto(s)
Arco Dental , Técnica de Expansión Palatina , Diente Canino , Humanos , Maxilar , Erupción Dental
17.
Am J Orthod Dentofacial Orthop ; 157(4): 444-453, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32241351

RESUMEN

INTRODUCTION: This split-mouth trial aimed to investigate the effect of low-level laser therapy (LLLT) on the amount of maxillary canine distalization when applied every 4 weeks over 12 weeks. METHODS: Twenty-two adolescents and young adults (15 female, 7 male; aged 13-25 years; n = 22) requiring bilateral maxillary first premolar extractions were recruited. After extractions and leveling-alignment, canines were retracted using closed-coil nickel-titanium springs delivering 150 g of force. LLLT was applied to 8 intraoral points on the buccal and palatal sides around the canine root for 10 seconds per point, on day 0, 28, and 56 with the control side receiving sham application. Alginate impressions were taken every 4 weeks on day 0, 28, 56, and 84. The amount of tooth movement, anchorage loss, and canine rotation were measured digitally. Randomization was generated using www.randomisation.com and allocation concealment through sequentially numbered, opaque, sealed envelopes. Participants, operator, and statistic assessor were blinded. Linear regression modeling accounting for clustering within each patient was used to identify differences between LLLT and control sides. RESULTS: Twenty-one patients completed the study. The total amount of tooth movement was similar in the LLLT (2.55 ± 0.73 mm) and control group (2.30 ± 0.86 mm), whereas 0.25 mm (95% confidence interval, -0.21, 0.71 mm) of difference was insignificant (P = 0.27). No significant differences were found for anchorage loss (P = 0.22) or canine rotation (P = 0.25). No harms were reported. CONCLUSIONS: Application of LLLT every 4 weeks did not result in differences in the amount of tooth movement, anchorage loss, and canine rotation during extraction space closure.


Asunto(s)
Terapia por Láser , Terapia por Luz de Baja Intensidad , Adolescente , Adulto , Diente Premolar , Diente Canino , Femenino , Humanos , Masculino , Alambres para Ortodoncia , Técnicas de Movimiento Dental , Adulto Joven
18.
Am J Orthod Dentofacial Orthop ; 157(4): 550-560, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32241362

RESUMEN

This case report describes the successful orthodontic treatment for a healthy woman with maxillary canine-premolar transposition associated with rare hypodontia of the contralateral canine. The treatment included extraction of the transposed maxillary right and deciduous maxillary left canines and 2 mandibular second premolars. The objectives of the treatment were to (1) correct the upper midline deviation and the occlusal plane cant, (2) move the maxillary first premolars into the canine position, (3) retract the mandibular incisors to improve the facial profile, and (4) reduce the labial protrusion. Orthodontic treatment was carried out with the lingual technique in the maxillary arch and esthetic ceramic brackets in the mandibular arch. The segmented mechanics were effective, fast, and consistently promoted the necessary movement without side effects. The smile line was improved, resulting in an ideal and esthetic gingival exposition, with the borders of the maxillary teeth following the lower lip smile curvature. The patient achieved ideal dentofacial esthetics, achieved better dental and functional occlusion, was pleased with her improved facial contour, and as a result, showed an improved self-image.


Asunto(s)
Estética Dental , Técnicas de Movimiento Dental , Diente Canino , Femenino , Humanos , Incisivo , Maxilar
19.
J Med Life ; 13(1): 56-63, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32341702

RESUMEN

Our aim was to evaluate the location of impacted canines and their proximity to the lateral and central incisor to assess the prognosis of the impacted canine and compare the reliability of 2D versus 3D imaging solutions. We carried a prospective study on 17 subjects with impacted maxillary canines. Later, the patients underwent radiologic examination, i.e., sectional computed tomography and orthopantomography. The obtained records were compared regarding the location of the impacted maxillary canine, the proximity and resorption of the impacted canine to the lateral and central incisors, the prognosis of the impacted canine, and the linear distance of the canine from the vertical and horizontal reference lines drawn. Eleven males (45.8%) and 13 females (54.1%), 11 (45.8%) impacted canines on the right side, and 13 (54.1%) on the left side, as well as 2 (8.3%) transpositions, were noted. Buccally impacted teeth caused less resorption of the adjacent teeth. Among the 24 teeth examined using orthopantomography with the sector method, 3 (12.5%) teeth were found in sector 1. There were 8 (33.33%) teeth in sector 2, and 11 (45.8%) of the impacted canines were in sector 3. In localizing impacted maxillary canines, computed tomography revealed an increased accuracy of 31% compared to orthopantomography. Even though both computed tomography and orthopantomography revealed similar records, computed tomography showed more accuracy, also having an added advantage of its 3D viewing capabilities in precise localization of the impacted maxillary canine.


Asunto(s)
Incisivo/diagnóstico por imagen , Radiografía Panorámica , Tomografía Computarizada por Rayos X , Diente Impactado/diagnóstico por imagen , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Imagenología Tridimensional , Masculino , Estudios Prospectivos , Reproducibilidad de los Resultados
20.
Rev. cient. odontol ; 8(1): e004-e004, ene.-abr. 2020. tab.
Artículo en Español | LILACS, LIPECS | ID: biblio-1095493

RESUMEN

Objetivo: Determinar la asociación entre el índice canino mandibular y el sexo, mediante la evaluación de volúmenes de pacientes que acudieron al CDI en el periodo 2014-2017. Metodología: Se evaluaron 500 volúmenes por tomografía computarizada de haz cónico (TCHC) de 184 hombres y 316 mujeres, con edades entre 12 y 50 años, por medio del software RealScan 2.0. Para hallar los datos, se usó la herramienta de medida y se procedió a determinar el diámetro mesiodistal del canino inferior derecho e izquierdo, así como la distancia intercanina inferior en cada volumen. Luego, se determinó el dimorfismo sexual de caninos, y se halló que el izquierdo presentaba el mayor valor (5,667%). Con este dato, se obtuvo el índice canino mandibular (ICM) por cada volumen. Seguidamente, se determinó el índice canino mandibular estándar (ICMs) ­ punto de corte­ y se obtuvo un valor de 0,264 y, a partir de él, se realizó la comparación entre el valor real del sexo de cada volumen con el obtenido a partir del punto de corte. Resultados: La eficacia del índice canino mandibular en hombres fue del 55.43% y en mujeres, del 54,75% (kappa = 0,095). Conclusión: El índice canino mandibular no debe ser considerado como un método determinante para la estimación del sexo. (AU)


Objective: To determine the association between the mandibular canine index (MCI) and sex by evaluating cone-beam computed tomographies (TCHC) of patients attending a radiographic center during 2014 to 2017. Methodology: 500 TCHCs of 184 men and 316 women ages 12-50 years were assessed using RealScan 2.0 software. The distal mesio diameter of the right and left lower canines was determined, as well as the lower intercanine distance in each TCHC. Then, the presence of sexual dimorphism was determined according to the canine teeth, with the left canine presenting the highest value (5.67%), and with these data, the MCI was obtained for each TCHC. Subsequently, the standard MCI cut-off point was determined, obtaining a value of 0.264 and the real value of the sex of each TCHC was compared with the cut-off point. Results: The efficacy of the MCI was 55.43% in men and 54.75% in women (kappa = 0.095). Conclusion: The MCI is not a good determinant for estimating sex. (AU)


Asunto(s)
Humanos , Masculino , Femenino , Adolescente , Adulto , Persona de Mediana Edad , Sexo , Análisis para Determinación del Sexo , Caracteres Sexuales , Diente Canino , Tomografía Computarizada de Haz Cónico , Epidemiología Descriptiva , Estudios Transversales , Estudios Retrospectivos , Estudios Observacionales como Asunto
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