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1.
Head Face Med ; 17(1): 4, 2021 Feb 05.
Artículo en Inglés | MEDLINE | ID: mdl-33546715

RESUMEN

BACKGROUND: The purpose of this study was to analyze the relationship between body posture and sagittal dental overjet in children before and after early orthodontic treatment with removable functional orthodontic appliances. METHODS: Angle Class II patients (mean age 8.2 ± 1.2 years; 29 males and 25 females) with a distinctly enlarged overjet (> 9 mm) were retrospectively examined regarding body posture parameters before and after early orthodontic treatment. In addition, changes in overjet were investigated with the aid of plaster models. Forms of transverse dysgnathism (crossbite, lateral malocclusions) and open bite cases were excluded. Body posture parameters kyphosis, lordosis, surface rotation, pelvic tilt, pelvic torsion and trunk imbalance were analyzed by means of rasterstereographical photogrammetry to determine, if the orthodontic overjet correction is associated with specific changes in posture patterns. RESULTS: In nearly all patients an overjet correction and an improvement regarding all body posture and back parameters could be noted after early orthodontic treatment. Overjet reduction (- 3.9 mm ± 2.1 mm) and pelvic torsion (- 1.28° ± 0,44°) were significantly (p < 0.05) and moderately correlated (R = 0.338) with no significant associations found for the other posture and back parameters (p > 0.05). CONCLUSION: Overjet reduction during early orthodontic treatment may be associated with a detectable effect on pelvic torsion.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión , Aparatos Ortodóncicos Funcionales , Niño , Femenino , Humanos , Masculino , Maloclusión/diagnóstico por imagen , Maloclusión/terapia , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Postura , Estudios Retrospectivos
2.
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
3.
Angle Orthod ; 91(2): 164-170, 2021 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-33434276

RESUMEN

OBJECTIVES: To investigate the skeletal and dentoalveolar effects of Invisalign's G5 protocol with virtual bite ramps in the treatment of adults with skeletal deep bites. MATERIALS AND METHODS: This retrospective study was conducted on consecutively treated adults presenting with skeletal deep bites as defined by the Overbite Depth Indicator (ODI). Subjects were divided into 2 groups: Invisalign group (n = 24) treated with the Invisalign G5 protocol and a full fixed appliance (FFA) group (n = 24) treated with edgewise FFAs and matched to the Invisalign group by ODI, sex, type of malocclusion, and non-extraction treatment. Pretreatment (T1) and post-comprehensive treatment (T2) lateral cephalograms were obtained and analyzed. RESULTS: Both the Invisalign and FFA groups showed significant changes from T1 to T2 in ODI and other skeletal and dentoalveolar measurements. The mean change in ODI was -1.5° (P < .001) for the Invisalign group and -2.0° (P < .001) for the FFA group. The mean decrease in overbite was 1.3 mm (P < .001) and 2.0 mm (P < .001) for the Invisalign and FFA groups, respectively. The mean increase in mandibular plane angle (Sn-GoGn) was 0.65° (P = .003) for the Invisalign group and 1.15° (P < .001) for the FFA group. When the groups were compared with each other, both ODI (P = .03) and overbite (P = .003) were significantly different in addition to other measurements. CONCLUSIONS: Although FFA treatment had more apparent skeletal changes for deep bite adult patients when compared with Invisalign, both systems were effective in opening deep bites at dentoalveolar and skeletal levels.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión , Aparatos Ortodóncicos Removibles , Sobremordida , Adulto , Cefalometría , Humanos , Maloclusión/diagnóstico por imagen , Maloclusión/terapia , Mandíbula , Estudios Retrospectivos
4.
Angle Orthod ; 90(3): 376-382, 2020 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-33378428

RESUMEN

OBJECTIVES: To compare, using surface-to-surface (StS) matching, any shape differences between the crossbite and noncrossbite side of the glenoid fossa and articular eminence in adult patients affected by posterior unilateral crossbite (PUXB) and compare them with unaffected controls. MATERIALS AND METHODS: 32 cone beam computed tomography (CBCT) scans of patients (mean age: 23.72 ± 3.74 years) undergoing surgical maxillary expansion were analyzed to obtain three-dimensional models of the left and right glenoid fossae that were superimposed using stable anatomical reference points and then compared using StS matching to evaluate the presence of any shape differences. These findings were compared with those obtained from 16 CBCT scans of unaffected controls (mean age: 23.72 ± 3.73 years). RESULTS: A mean difference of >11% was found between the study group and controls when comparing the matching percentages of the two sides of the glenoid fossa and articular eminence at all three levels of tolerance selected for this study. These differences were found to be highly statistically significant (P ≤ .0001). CONCLUSIONS: According to the shape analysis findings, adult PUXB patients exhibit a higher degree of glenoid fossa and articular eminence shape differences compared to unaffected controls.


Asunto(s)
Cavidad Glenoidea , Maloclusión , Tomografía Computarizada de Haz Cónico Espiral , Adulto , Tomografía Computarizada de Haz Cónico , Cavidad Glenoidea/diagnóstico por imagen , Humanos , Maloclusión/diagnóstico por imagen , Cóndilo Mandibular , Técnica de Expansión Palatina , Articulación Temporomandibular , Adulto Joven
5.
Angle Orthod ; 90(5): 665-671, 2020 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-33378477

RESUMEN

OBJECTIVE: To investigate the value-addition of obtaining lateral cephalometric radiographs during the treatment planning phase of orthodontic treatment. MATERIALS AND METHODS: The records of 100 orthodontic patients were presented to seven scorers during two phases that were 6 weeks apart. In the first phase, scorers completed a seven-question survey with questions regarding treatment planning. They were given various diagnostic records that did not include a lateral cephalometric radiograph. Six weeks later, the same scorers completed the same survey for the same patient cases with the same diagnostic records that additionally included a lateral cephalometric radiograph. Correlation coefficients were used to calculate intrarater agreement and inter-rater agreement within the study. RESULTS: Cohen's kappa values showed moderate to almost perfect agreement for the majority of survey questions. Intrarater agreement ranged between 0.430 and 1. Cronbach's alpha reliability statistics showed good interrater agreement for all questions in the survey. Agreement ranged from 0.710 to 0.913 across the survey questions. Diagnosing Angle classification of occlusion had the highest level of agreement and differentiating between skeletal and dental malocclusion had the lowest level of agreement. CONCLUSIONS: The lateral cephalometric radiograph is not a necessary diagnostic tool for most cases in orthodontic diagnosis and treatment planning. Weighing the usefulness of a lateral cephalometric on a case-by-case basis should be recommended to align with the principle of ALARA (as low as reasonably achievable), especially in a primarily pediatric population.


Asunto(s)
Maloclusión , Cefalometría , Niño , Humanos , Maloclusión/diagnóstico por imagen , Maloclusión/terapia , Planificación de Atención al Paciente , Radiografía , Reproducibilidad de los Resultados
6.
Rev. ADM ; 77(5): 244-246, sept.-oct. 2020. tab
Artículo en Español | LILACS | ID: biblio-1146798

RESUMEN

La importancia del análisis cefalométrico dentro del diagnóstico en ortodoncia ha ido incrementando a través de los años, por ello, el interés de comparar la confiabilidad de los sistemas digitales con el trazado manual convencional. Objetivo: Definir el grado de concordancia entre los resultados de trazado cefalométrico manual y con Nemoceph. Material y métodos: Se utilizaron ocho medidas lineales y angulares del análisis cefalométrico de Steiner. Se realizó un estudio transversal, correlacional, en el cual se analizaron 70 radiografías laterales de cráneo digitales. Los resultados se dividieron en dos grupos, trazado manual y trazado cefalométrico con Nemoceph, los cuales fueron evaluados con un índice de correlación intraclase. Conclusión: Se reportó un grado de correlación intraclase mayor a 0.75, estableciendo que el sistema digital exhibe la misma precisión del manual, con algunas ventajas convenientes a la época (AU)


The importance taken by the cephalometric analysis within the orthodontic diagnosis has been increasing over the years, for that reason the interest of comparing the reliability of the digital systems with the conventional manual tracing. Objective: To define the degree of concordance between the results of manual cephalometric tracing and with Nemoceph. Material and methods: Eight linear and angular measurements of Steiner's cephalometric analysis were used. A crosssectional, correlational study was conducted in which 70 digital skull lateral radiographs were analyzed. The results were divided into two groups; manual tracing and cephalometric tracing with Nemoceph, which were evaluated with an intraclass correlation index. Conclusion: a correlation degree greater than 0.75 was reported. Establishing that the digital system exhibits the same precision of the manual, with some advantages suited to the age (AU)


Asunto(s)
Humanos , Cefalometría/métodos , Radiografía Dental Digital , Maloclusión/diagnóstico por imagen , Interpretación de Imagen Asistida por Computador/métodos , Estudios Transversales , Análisis Estadístico , México
7.
PLoS One ; 15(7): e0236425, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32726330

RESUMEN

Craniofacial asymmetry, mandibular condylar modeling and temporomandibular joint disorders are common comorbidities of skeletally disproportionate malocclusions, but etiology of occurrence together is poorly understood. We compared asymmetry, condyle modeling stability and temporomandibular health in a cohort of 128 patients having orthodontics and orthognathic surgery to correct dentofacial deformity malocclusions. We also compared ACTN3 and ENPP1 genotypes for association to clinical conditions. Pre-surgical posterior-anterior cephalometric and panometric radiographic analyses; jaw pain and function questionnaire and clinical examination of TMD; and SNP-genotype analysis from saliva samples were compared to assess interrelationships. Almost half had asymmetries in need of surgical correction, which could be subdivided into four distinct morphological patterns. Asymmetric condyle modeling between sides was significantly greater in craniofacial asymmetry, but most commonly had an unanticipated pattern. Often, longer or larger condyles occurred on the shorter mandibular ramus side. Subjects with longer ramus but dimensionally smaller condyles were more likely to have self-reported TMD symptoms (p = 0.023) and significantly greater clinical diagnosis of TMD (p = 0 .000001), with masticatory myalgia most prominent. Genotyping found two significant genotype associations for ACTN3 rs1671064 (Q523R missense) p = 0.02; rs678397 (intronic SNP) p = 0.04 and one significant allele association rs1815739 (R577X nonsense) p = 0.00. Skeletal asymmetry, unusual condyle modeling and TMD are common and interrelated components of many dentofacial deformities. Imbalanced musculoskeletal functional adaptations and genetic or epigenetic influences contribute to the etiology, and require further investigation.


Asunto(s)
Actinina/genética , Deformidades Dentofaciales/genética , Predisposición Genética a la Enfermedad , Hidrolasas Diéster Fosfóricas/genética , Pirofosfatasas/genética , Trastornos de la Articulación Temporomandibular/genética , Adulto , Mentón/diagnóstico por imagen , Modelos Dentales , Deformidades Dentofaciales/diagnóstico por imagen , Deformidades Dentofaciales/patología , Deformidades Dentofaciales/cirugía , Cara/diagnóstico por imagen , Femenino , Estudios de Asociación Genética , Humanos , Maxilares/diagnóstico por imagen , Masculino , Maloclusión/diagnóstico por imagen , Maloclusión/genética , Maloclusión/patología , Maloclusión/cirugía , Cóndilo Mandibular/diagnóstico por imagen , Cóndilo Mandibular/patología , Cóndilo Mandibular/cirugía , Procedimientos Quirúrgicos Ortognáticos , Polimorfismo de Nucleótido Simple/genética , Trastornos de la Articulación Temporomandibular/diagnóstico por imagen , Trastornos de la Articulación Temporomandibular/patología , Trastornos de la Articulación Temporomandibular/cirugía
8.
J Appl Oral Sci ; 28: e20190399, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32348443

RESUMEN

Objectives To evaluate the acoustic properties of the /s/ sound in individuals with different occlusion types and to investigate relationships between these properties and cephalometric measurements. Methodology Sixty patients were divided into three groups based on malocclusion. Group 1 included 20 patients (mean age: 14.85±2.01 years) with Class I skeletal and dental relationships. Group 2 included 20 patients (mean age: 13.49±1.78 years) with Class II skeletal and dental relationships. Group 3 included 20 patients (mean age: 12.46±2.62 years) with Class III skeletal and dental relationships. Cephalometric tracings were obtained from cephalometric radiographs. All included patients were native speakers of Turkish. The /s/ sound was selected for center of gravity analysis. Correlations between cephalometric values and acoustic parameters were also investigated. Results The center of gravity of the /s/ sound had the lowest value in Group 2 (p<0.05). For the /s/ sound in Group 3, moderate positive correlations were found between center of gravity and Sella-Nasion to Gonion-Gnathion angle (p<0.05, r=0.444) Lower incisor to Nasion-B point (p<0.023, r=0.505), and Lower incisor to Nasion-B point angle (p<0.034; r=0.476). No correlation was found in other cephalometric measurements. Conclusions The /s/ sound was affected by malocclusion due to the changing place of articulation. Therefore, referral to an orthodontist for malocclusion treatment especially patients with class III in the early period is suggested for producing acoustically ideal sound.


Asunto(s)
Cefalometría , Maloclusión/fisiopatología , Acústica del Lenguaje , Trastornos del Habla/fisiopatología , Adolescente , Niño , Femenino , Humanos , Masculino , Maloclusión/complicaciones , Maloclusión/diagnóstico por imagen , Mandíbula/anatomía & histología , Mandíbula/fisiopatología , Maxilar/anatomía & histología , Maxilar/fisiopatología , Estudios Prospectivos , Radiografía , Valores de Referencia , Trastornos del Habla/diagnóstico por imagen , Trastornos del Habla/etiología , Estadísticas no Paramétricas , Lengua/anatomía & histología , Lengua/fisiopatología , Turquia
9.
Folia Morphol (Warsz) ; 79(1): 148-155, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-30973636

RESUMEN

BACKGROUND: The aim of this study was to examine the morphologic features of the stylohyoid complex (SHC) and its relation to maxillomandibular position using three-dimensional cone beam computed tomography (CBCT) images. MATERIALS AND METHODS: CBCT images from 157 individuals (74 females, 83 males) were analysed in this study. SHC length, width, and sagittal and transverse angles were measured. The subjects were grouped as skeletal class I, II, and III in order to determine the relative positions of the maxilla and mandible in the sagittal plane and as hypodivergent, normodivergent, and hyperdivergent according to the vertical rotation of the mandible in relation to the skull base. Mann-Whitney U and Kruskal-Wallis H tests were used for statistical analysis. RESULTS: Mean SHC length was 23.56 ± 8.05 mm on the right side and 22.0 ± 6.51 mm on the left; mean SHC width was 3.31 ± 1.40 mm on the right and 2.93 ± 1.30 mm on the left. Mean sagittal angle was 27.43 ± 6.75° on the right side, 27.70 ± 6.51° on the left; mean transverse angle was 70.39 ± 4.59° on the right side and 71.79 ± 4.99° on the left. The only significant difference based on skeletal classification was greater SHC length among males compared to females in the class III group (p < 0.05). CONCLUSIONS: No significant relationship was observed between SHC morphology and position of the maxilla or mandible. However, the gender difference observed among class III subjects suggests that SHC morphology may be affected by craniofacial morphology. Maxillofacial surgeons should investigate this anatomical landmark variation before surgical interventions involving this region, such as temporomandibular joint procedures.


Asunto(s)
Mandíbula/anatomía & histología , Maxilar/anatomía & histología , Hueso Temporal/anatomía & histología , Adolescente , Adulto , Anciano , Tomografía Computarizada de Haz Cónico , Femenino , Humanos , Imagenología Tridimensional , Masculino , Maloclusión/diagnóstico por imagen , Persona de Mediana Edad , Adulto Joven
10.
J. appl. oral sci ; 28: e20190399, 2020. tab, graf
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1101253

RESUMEN

Abstract Objectives To evaluate the acoustic properties of the /s/ sound in individuals with different occlusion types and to investigate relationships between these properties and cephalometric measurements. Methodology Sixty patients were divided into three groups based on malocclusion. Group 1 included 20 patients (mean age: 14.85±2.01 years) with Class I skeletal and dental relationships. Group 2 included 20 patients (mean age: 13.49±1.78 years) with Class II skeletal and dental relationships. Group 3 included 20 patients (mean age: 12.46±2.62 years) with Class III skeletal and dental relationships. Cephalometric tracings were obtained from cephalometric radiographs. All included patients were native speakers of Turkish. The /s/ sound was selected for center of gravity analysis. Correlations between cephalometric values and acoustic parameters were also investigated. Results The center of gravity of the /s/ sound had the lowest value in Group 2 (p<0.05). For the /s/ sound in Group 3, moderate positive correlations were found between center of gravity and Sella-Nasion to Gonion-Gnathion angle (p<0.05, r=0.444) Lower incisor to Nasion-B point (p<0.023, r=0.505), and Lower incisor to Nasion-B point angle (p<0.034; r=0.476). No correlation was found in other cephalometric measurements. Conclusions The /s/ sound was affected by malocclusion due to the changing place of articulation. Therefore, referral to an orthodontist for malocclusion treatment especially patients with class III in the early period is suggested for producing acoustically ideal sound.


Asunto(s)
Humanos , Masculino , Femenino , Niño , Adolescente , Acústica del Lenguaje , Trastornos del Habla/fisiopatología , Cefalometría , Maloclusión/fisiopatología , Valores de Referencia , Trastornos del Habla/etiología , Trastornos del Habla/diagnóstico por imagen , Lengua/anatomía & histología , Lengua/fisiopatología , Turquia , Radiografía , Estudios Prospectivos , Estadísticas no Paramétricas , Maloclusión/complicaciones , Maloclusión/diagnóstico por imagen , Mandíbula/anatomía & histología , Mandíbula/fisiopatología , Maxilar/anatomía & histología , Maxilar/fisiopatología
11.
Shanghai Kou Qiang Yi Xue ; 29(6): 656-660, 2020 Dec.
Artículo en Chino | MEDLINE | ID: mdl-33778837

RESUMEN

PURPOSE: To evaluate the morphology and position of condyle and fossa and joint space of adolescent temporomandibular joint with Class Ⅱ subdivision malocclusion, in order to provide a reference for diagnosis before treatment. METHODS: The study sample consisted of 30 adolescent patients with Class Ⅱ subdivision malocclusions(9 males, 21 females, mean age 12.5 years) as the experimental group and 30 adolescent patients with Class Ⅰ malocclusions (11 males, 19 females, mean age 12 years) as the control group treated from June 2018 to December 2019 in Suzhou Stomatological Hospital. The long axis of condyle, short axis of condyle, the distance from the outer pole of condyle to sagittal midline, horizontal angle of condyle, Joint space(medial, inner, outer, anterior, superior, posterior), vertical height of condyle, width of joint fossa, depth of joint fossa, angle of posterior wall of the articular tubercle and vertical distance of bilateral condyle to horizontal line were measured on cone-beam CT(CBCT) images and analyzed with Dolphin Imaging 11.95. SPSS 23.0 software package was used for statistical analysis of the data. RESULTS: In Angle Class Ⅱ subdivision malocclusion patients, there were significant differences in posterior joint space, horizontal angle of condyle, vertical height of condyle, width of joint fossa, depth of joint fossa and angle of posterior wall of the articular tubercle between neutral side and distal side(P<0.01). In Angle Class Ⅰ malocclusion patients, there was no significant difference in joint fossa morphology, condyle morphology and condyle position between right side and left side (P>0.05). CONCLUSIONS: There may be differences in condyle position, condyle shape and joint fossa shape between patients with Class Ⅱ subdivision malocclusions and Class Ⅰ malocclusion patients. More attention should be paid to the temporomandibular joint in initial clinical examination and clinical orthodontic treatment.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión de Angle Clase I , Maloclusión , Adolescente , Tomografía Computarizada de Haz Cónico , Humanos , Maloclusión/diagnóstico por imagen , Maloclusión de Angle Clase II/diagnóstico por imagen , Cóndilo Mandibular/diagnóstico por imagen , Articulación Temporomandibular/diagnóstico por imagen
12.
Cient. dent. (Ed. impr.) ; 16(3): 217-221, sept.-dic. 2019. ilus
Artículo en Español | IBECS | ID: ibc-185997

RESUMEN

Las malformaciones dentales son defectos formativos causados por alteraciones genéticas durante la morfogénesis den-tal. Pueden ser provocados por factores de índole hereditario, sistémico, traumático o local. Dentro de estas anomalías se encuentra el taurodontismo. Éste se caracteriza por presentar una alteración de la morfología dentaria en la que la porción coronaria del órgano dentario se encuentra alargada con una cámara pulpar ensanchada, a expensas de la porción radicular, disminuyendo la longitud y por tanto, produciéndose una migración apical de la furca del diente. El objetivo del presente artículo es describir las anomalías de forma dentaria y más concretamente el manejo clínico del paciente con taurodoncia en la clínica dental. Para ello se presenta el caso clínico de un paciente de 18 años de edad que acude al Hospital Universitario de la Princesa de Madrid para valorar la exodoncia de dos molares localizados en el primer y cuarto cuadrante. Tras un diagnóstico clínico y radiológico apropiado, se procedió a la exodoncia de los mismos


Dental anomalies are formative defects caused by genetic disturbances during tooth morphogenesis, can be caused by factors of a hereditary, systemic, traumatic or local nature. One such anomaly is taurodontism. It is characterized by pulp chamber enlargement, which may approximate of the root apex, with the body of the tooth enlarged at the expense of the roots and apically displaced furcation areas.The aim of this case report is to describe the abnormalities of tooth shape and particularly the management in the dental clinic of patients with taurodontism. For this purpose a case of a eighteen years patient visiting the Hospital Universitario de la Princesa of Madrid to assess the extraction of two molars located in the first and fourth quadrants. After a proper clinical and radiological diagnostic we proceeded to the extraction


Asunto(s)
Humanos , Masculino , Adolescente , Anomalías Dentarias/diagnóstico por imagen , Anomalías Dentarias/terapia , Maloclusión/diagnóstico por imagen , Cirugía Bucal/métodos , Procedimientos Quirúrgicos Orales/métodos , Radiografía Panorámica
13.
Am J Orthod Dentofacial Orthop ; 156(4): 493-501, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31582121

RESUMEN

INTRODUCTION: The purpose of this research was to evaluate dental compensation in facial asymmetry and its correlation with skeletal variables using cone-beam computed tomography. METHODS: Sixty adult patients were retrospectively divided into asymmetry (mean age, 21.8 ± 5.4 years) and symmetry groups (mean age, 28.1 ± 4.1 years); both groups comprised 30 patients. Independent and paired t tests were used for comparisons between the asymmetry and symmetry groups and between deviated (Dv) and nondeviated (NDv) sides of the asymmetry group, respectively. Pearson correlation between dental and skeletal variables was performed. RESULTS: The mean value of menton deviation was 9.4 mm in the asymmetry group. Compared with the symmetry group, the direction and amount of dental compensation of the asymmetry group were as follows: 2.5-mm extrusion of the maxillary first molar (UM6) at NDv (P <0.05); 1.8-mm higher position of the mandibular canine (LC) from the mandibular horizontal plane using mental foramen (MHP_mf) at NDv (P <0.05); 6°-more buccoversion of UM6 at Dv; 3.7°-more linguoversion of UM6 at NDv; 4.8°-more buccoversion of the maxillary canine (UC) at Dv; 4.9°-more buccoversion of the mandibular molar (LM6) at NDv; and 2.6°-more linguoversion of LC at Dv. Dental compensation correlated or marginally correlated with skeletal variables of the deviated mandible. CONCLUSIONS: Dental compensations, extrusion of the maxillary molars on the NDv, and buccal tipping of the maxillary teeth and lingual tipping of the mandibular teeth on the Dv, were observed. The mandibular body length was associated with linguoversion of the mandibular molars on the Dv. The ramal inclination was related to the extrusion of the maxillary molars on the NDv.


Asunto(s)
Cefalometría/métodos , Tomografía Computarizada de Haz Cónico/métodos , Asimetría Facial/diagnóstico por imagen , Maloclusión/diagnóstico por imagen , Diente Molar/diagnóstico por imagen , Adolescente , Adulto , Estética Dental , Asimetría Facial/fisiopatología , Femenino , Humanos , Imagenología Tridimensional/métodos , Masculino , Maloclusión/fisiopatología , Persona de Mediana Edad , Diente Molar/fisiopatología , Estudios Retrospectivos
14.
Am J Orthod Dentofacial Orthop ; 156(3): 420-428, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31474272

RESUMEN

INTRODUCTION: This study aimed to test the accuracy of the 3-dimensional (3D) digital dental models generated by the Dental Monitoring (DM) smartphone application in both photograph and video modes over successive DM examinations in comparison with 3D digital dental models generated by the iTero Element intraoral scanner. METHODS: Ten typodonts with setups of class I malocclusion and comparable severity of anterior crowding were used in the study. iTero Element scans along with DM examination in photograph and video modes were performed before tooth movement and after each set of 10 Invisalign aligners for each typodont. Stereolithography (STL) files generated from the DM examinations in photograph and video modes were superimposed with the STL files from the iTero scans using GOM Inspect software to determine the accuracy of both photograph and video modes of DM technology. RESULTS: No clinically significant differences, according to the American Board of Orthodontics-determined standards, were found. Mean global deviations for the maxillary arch ranged from 0.00149 to 0.02756 mm in photograph mode and from 0.0148 to 0.0256 mm in video mode. Mean global deviations for the mandibular arch ranged from 0.0164 to 0.0275 mm in photograph mode and from 0.0150 to 0.0264 mm in video mode. Statistically significant differences were found between the 3D models generated by the iTero and the DM application in photograph and video modes over successive DM examinations. CONCLUSIONS: 3D digital dental models generated by the DM smartphone application in photograph and video modes are accurate enough to be used for clinical applications.


Asunto(s)
Exactitud de los Datos , Técnica de Impresión Dental , Modelos Dentales , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional/métodos , Diseño Asistido por Computadora , Arco Dental , Humanos , Maloclusión/diagnóstico por imagen , Aparatos Ortodóncicos/normas , Aparatos Ortodóncicos Removibles , Ortodoncia/normas , Fotografía Dental , Teléfono Inteligente , Programas Informáticos , Estereolitografía , Tecnología Odontológica/métodos , Técnicas de Movimiento Dental , Grabación en Video
15.
Am J Orthod Dentofacial Orthop ; 156(2): 178-185, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-31375227

RESUMEN

INTRODUCTION: This study aimed to identify significant factors affecting the spontaneous angular changes of impacted mandibular third molars as a result of second molar protraction. Temporary skeletal anchorage devices in the missing mandibular first molar (ML-6) or missing deciduous mandibular second molar (ML-E) with missing succedaneous premolar spaces provided traction. METHODS: Forty-one mandibular third molars of 34 patients (10 male and 24 female; mean age 18.3 ± 3.7 years) that erupted after second molar protraction were included in this study. They were classified into upright (U) and tilted (T) groups. Linear and angular measurements were performed at the time of treatment initiation (T1) and of ML-6 or ML-E space closure (T2). Regression analyses were used to identify significant factors related to third molar uprighting. RESULTS: Nolla stage (odds ratio [OR] 4.1), sex (OR 0.003 for male), third molar angulation at T1 (OR 1.1), missing tooth space (OR 0.006), rate of third molar eruption (OR 23.3), and rate of second molar protraction (OR 0.2) significantly affected third molar uprighting. Age, third molar angulation at T1, rate of third molar eruption, and rate of second molar protraction were significant factors for predicting third molar angulation at T2. CONCLUSIONS: Available space for third molar eruption before and after second molar protraction is not associated with uprighting of erupting third molars. Older patients whose third molars are in greater Nolla stage, are in a more upright position at T1, and have a greater eruption rate have a greater chance for third molar uprighting. Alternatively, an increase in second molar protraction rate results in mesial tipping of the third molars.


Asunto(s)
Maloclusión/prevención & control , Maloclusión/fisiopatología , Mandíbula/fisiopatología , Tercer Molar/fisiopatología , Diente Impactado/fisiopatología , Adolescente , Adulto , Puntos Anatómicos de Referencia , Diente Premolar , Femenino , Humanos , Masculino , Maloclusión/diagnóstico por imagen , Mandíbula/anatomía & histología , Mandíbula/diagnóstico por imagen , Diente Molar/anatomía & histología , Diente Molar/diagnóstico por imagen , Diente Molar/fisiopatología , Tercer Molar/anatomía & histología , Tercer Molar/diagnóstico por imagen , Aparatos Ortodóncicos , Cierre del Espacio Ortodóncico , Ortodoncia Correctiva , Erupción Dental , Diente Primario , Diente Impactado/complicaciones , Diente Impactado/diagnóstico por imagen , Adulto Joven
16.
Am J Orthod Dentofacial Orthop ; 156(2): 266-274, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-31375237

RESUMEN

Adult orthodontic treatment involving maxillary transverse deficiency is a challenge for an interdisciplinary team. Surgically assisted rapid palatal expansion to segment the maxilla was once the treatment of choice, but the invasiveness, bone deficiency, and gingival recession hindered its acceptance. Corticotomy-assisted rapid maxillary arch expansion with ridge augmentation has the advantage of augmenting alveolar bony housing to accommodate and facilitate tooth movement. This approach was used to correct a severely constricted maxilla with bilateral posterior crossbite and anterior crowding in a 46-year-old man. Treatment time was 14 months. The accelerated arch expansion overcame the crossbite in 7 months, increasing intercanine distance by 5.2 mm and intermolar distance by 9.8 mm. Subsequent implant prosthesis was able to be restored in a functional normal occlusion. Satisfactory and stable clinical outcome was followed for 7 years. Corticotomy-assisted rapid maxillary arch expansion with alveolar bone augmentation is a novel and effective interdisciplinary approach for correcting adult maxillary transverse deficiency. Well controlled prospective clinical trails are warranted for further investigation.


Asunto(s)
Aumento de la Cresta Alveolar/métodos , Maloclusión/terapia , Técnica de Expansión Palatina , Técnicas de Movimiento Dental/métodos , Cefalometría , Modelos Dentales , Oclusión Dental , Estudios de Seguimiento , Humanos , Masculino , Maloclusión/diagnóstico por imagen , Maloclusión/patología , Maloclusión/cirugía , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/patología , Maloclusión de Angle Clase II/cirugía , Maloclusión de Angle Clase II/terapia , Maloclusión de Angle Clase III/diagnóstico por imagen , Maloclusión de Angle Clase III/patología , Maloclusión de Angle Clase III/cirugía , Maloclusión de Angle Clase III/terapia , Maxilar/anomalías , Maxilar/patología , Maxilar/cirugía , Persona de Mediana Edad , Aparatos Ortodóncicos , Soportes Ortodóncicos , Alambres para Ortodoncia , Paladar (Hueso)/cirugía , Planificación de Atención al Paciente , Estudios Prospectivos , Resultado del Tratamiento
17.
Cient. dent. (Ed. impr.) ; 16(2): 87-92, mayo-ago. 2019. ilus, tab
Artículo en Español | IBECS | ID: ibc-183717

RESUMEN

El objetivo de este estudio fue determinar la presencia de asimetría del cóndilo mandibular en pacientes con mordida cruzada posterior unilateral que acudieron para posible tratamiento ortodóncico, comparando la altura y el ancho mandibular de ambos cóndilos. Métodos: Se midieron las anchuras y alturas condilares derechas e izquierdas en 42 ortopantomografías de pacientes infantiles de siete, ocho y nueve años, de ambos sexos, utilizando el método de Habets. Resultados: No se encontraron diferencias estadísticamente significativas, respecto al género y tipo de dentición, tanto en la altura como en la anchura condilar en la muestra compuesta por 42 pacientes. Conclusiones: No observamos la existencia de asimetría del cóndilo en el que se desarrolla la mordida cruzada posterior en relación al contralateral en los grupos de edad estudiados


The aim of this study was to determine the presence of asymmetry of the mandibular condyle in patients with a unilateral posterior crossbite who came for possible orthodontic treatment, comparing the mandibular height and width of both condyles. Methods: Right and left condyle widths and heights were measured in 42 orthopantomographies of seven, eight and nine year old children of both sexes, using the Habets method. Results: No statistically significant differences were found regarding gender and type of dentition, both in the height and in the condylar width in the sample composed of 42 patients. Conclusions: We did not observe the asymmetry of the condyle in which the posterior crossbite was developed in relation to the contralateral bite in the age groups studied


Asunto(s)
Humanos , Masculino , Femenino , Niño , Maloclusión/diagnóstico por imagen , Maloclusión/terapia , Ortodoncia/métodos , Cóndilo Mandibular/diagnóstico por imagen , Radiografía Panorámica/métodos , Mandíbula/diagnóstico por imagen , Mandíbula/anatomía & histología
18.
Int Orthod ; 17(3): 567-572, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-31296489

RESUMEN

Corticotomies are now an integral part of the orthodontist's therapeutic arsenal in adult orthodontics. In recent years, the number of publications about different surgical techniques has increased significantly. This shows that practitioners and patients have a common interest. It is now accepted that corticotomies cause a regional acceleratory phenomenon, which enables a faster dental movement, a reduction in treatment time, as well as a reduction in the risk of root resorption. The perspective of osteogenesis induced by corticotomies has already been mentioned in literature. It could provide a real advantage in maintaining the periodontium, reducing the risk of fenestration or dehiscence and the stability of long-term treatment by increasing the dental bone envelope. Through a clinical case, treated by mini- invasive surgical technique (as described in the previous article), we highlight the potential for osteogenesis induced by alveolar corticotomies and the utility of this procedure in adults.


Asunto(s)
Imagenología Tridimensional/métodos , Maloclusión/cirugía , Ortodoncia/métodos , Osteogénesis , Pérdida de Hueso Alveolar , Tomografía Computarizada de Haz Cónico , Humanos , Maloclusión/diagnóstico por imagen , Ortodoncia Correctiva/efectos adversos , Ortodoncia Correctiva/métodos , Osteogénesis/fisiología , Osteotomía/métodos , Ligamento Periodontal , Resorción Radicular , Adulto Joven
19.
Plast Reconstr Surg ; 144(2): 246e-251e, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31348355

RESUMEN

Orthognathic surgery is a powerful tool for correction of facial asymmetry and malocclusion. The goal is to achieve good dental function and facial aesthetics. Three-dimensional simulation is used for surgical planning, and bone gaps could be created to achieve facial balance. In this study, customized "spacers" were made using computer-aided design and three-dimensional printing for guides for use during surgery. With the final three-dimensional plan, the skull images were exported to 3-Matic software, where spacers were designed according to the bone gaps. Three-dimensionally-printed spacers were made and used to facilitate positioning and fixation. Consecutive patients with facial asymmetry were recruited in this prospective study. The postoperative outcome was assessed using a visual analogue scale and the three-dimensional facial surface area discrepancy index for subjective and objective evaluation. There were 12 patients and a total of 19 spacers for the Le Fort I and mandibular ramus segments. The spacers worked nicely during the bone fixation process. Mean preoperative and postoperative visual analogue scale scores were 4.83 and 7.14, with a statistically significant improvement for facial symmetry (p = 0.018). Mean preoperative and postoperative facial surface area discrepancy index was 0.95 and 0.98, and the correction of asymmetry was significant (p = 0.009). There were no related surgical complications. All patients were satisfied with the correction of facial asymmetry and malocclusion. The custom-made, three-dimensionally-printed spacers help to achieve surgical precision to correct and prevent facial asymmetry in orthognathic surgery. CLINICAL QUESTION/LEVEL OF EVIDENCE:: Therapeutic, IV.


Asunto(s)
Asimetría Facial/cirugía , Maloclusión/cirugía , Procedimientos Quirúrgicos Ortognáticos/métodos , Osteotomía Le Fort/métodos , Medicina de Precisión/métodos , Impresión Tridimensional , Adulto , Estudios de Cohortes , Diseño Asistido por Computadora , Estética , Asimetría Facial/diagnóstico por imagen , Femenino , Humanos , Masculino , Maloclusión/diagnóstico por imagen , Dolor Postoperatorio/fisiopatología , Dolor Postoperatorio/terapia , Cuidados Preoperatorios/métodos , Estudios Prospectivos , Cirugía Asistida por Computador/métodos , Taiwán , Resultado del Tratamiento , Adulto Joven
20.
Am J Orthod Dentofacial Orthop ; 156(1): 67-74, 2019 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-31256841

RESUMEN

INTRODUCTION: The objective of this study was to determine how different people perceive distinct malocclusions with the use of eye tracking and to compare the results with scores from the subjective visual attractiveness scale (VAS) following 3 grades obtained from the Aesthetic Component of the Index of Orthodontic Treatment Need (AC-IOTN) scale. METHODS: Ninety participants were equally distributed into 3 groups-dentists, orthodontists, and laypeople-and underwent 1 eye-tracking session. After being positioned and calibrated, they were shown 3 dental images. The images reflected the AC-IOTN grades of 1 (close to ideal), 5 (borderline need for treatment), and 8 (definite need for treatment). During the viewing, eye-tracker data were collected for fixation points, duration, and attractiveness (according to the VAS) for each image. The variables were statistically tested with the use of 2-way analysis of variance and complete factorial model (between groups, grades, and for the interactions between them). RESULTS: Grade 1 received the highest subjective score independently from the participant group. This was in contrast to grades 5 and 8, which received similar scores, although the means of fixation points and duration were not significantly different among the grades (P > 0.05). The scores obtained from the dentist group were significantly higher than those from the other groups when the comparison was independent from the grade. In terms of fixation points, there were differences between dentists and orthodontists and between orthodontists and laypeople. The fixation point mean was higher for orthodontists than for dentists and was similar to that for laypeople. CONCLUSIONS: Orthodontists were able to closely analyze the occlusal problems presenting with more severe malocclusions, and the specialists noticed more fixation points. Duration times, however, were not significantly different, because the orthodontists had greater interest, even in situations of unfavorable esthetics.


Asunto(s)
Estética Dental , Indice de Necesidad de Tratamiento Ortodóncico , Maloclusión/terapia , Percepción Visual , Adolescente , Adulto , Anciano , Análisis de Varianza , Actitud del Personal de Salud , Actitud Frente a la Salud , Odontólogos/psicología , Femenino , Humanos , Maloclusión/diagnóstico por imagen , Persona de Mediana Edad , Ortodoncia Correctiva , Ortodoncistas/psicología , Reproducibilidad de los Resultados , Proyectos de Investigación , Adulto Joven
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