Normal torque of the buccal surface of mandibular teeth and its relationship with bracket positioning: a study in normal occlusion

This study evaluated the degree of buccolingual inclination of mandibular tooth crowns relative to torque. For such purpose, mandibular and maxillary stone casts from 31 Caucasian Brazilian adults with normal occlusion, pleasant facial aspect and no history of previous orthodontic treatment were examined. A custom device was developed for measuring the degree of inclination (torque) of bracket slots of orthodontic appliances relative to the occlusion plane, at three bonding height: standard (center of clinical crown), occlusal (0.5 mm occlusally from standard) and cervical (0.5 mm cervically from standard). Except for the mandibular incisors, which presented a small difference in torque from one another (lingual root torque for central incisors and buccal root torque for lateral incisors), the remaining average values are close to those found in the literature. Due to the convexity of the buccal surface, the 1-mm vertical shift of the brackets from occlusal to cervical affected the values corresponding to the normal torque, in approximately 2 degrees in central and lateral incisors, 3 degrees in canines and 8 degrees in premolars and molars.

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Interceptive Orthodontics with Resin Turbos for Pseudo-Class III Malocclusions

Case Reports in Dentistry ◽

10.1155/2019/1909063 ◽

2019 ◽

Vol 2019 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Neal D. Kravitz

Keyword(s):

Orthodontic Treatment ◽

Gingival Recession ◽

Mixed Dentition ◽

Gingival Tissue ◽

Common Finding ◽

Orthodontic Appliances ◽

Class Iii ◽

Class Iii Malocclusion ◽

Practical Implications ◽

Mandibular Incisors

Background and Overview. Lingual eruption of the permanent maxillary central incisors in the early mixed dentition can result in a traumatic anterior crossbite, causing mobility and gingival recession to the opposing mandibular incisors.Case Description. This case report presents a common finding of a 7-year-old boy with a dental crossbite and pseudo-Class III malocclusion caused by lingual eruption of the maxillary central incisors. An interceptive phase of orthodontic treatment was provided by bonding a beveled resin turbo on the mandibular incisors. The crossbite was corrected in 3 months without any orthodontic appliances. In the absence of the traumatic occlusion, the mandibular incisors stabilized and the gingival tissue was expected to regenerate.Conclusions and Practical Implications. Dentists and orthodontists can place beveled resin turbos on the mandibular incisors to jump an anterior dental crossbite conservatively, without the use of orthodontic brackets and wires.

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Overbite depth indicator and anteroposterior dysplasia indicator cephalometric norms for African Americans

The Angle Orthodontist ◽

10.2319/021619-116.1 ◽

2019 ◽

Vol 89 (6) ◽

pp. 897-902

Author(s):

Samuel Obamiyi ◽

Zhihui Wang ◽

Edward Sommers ◽

P. Emile Rossouw ◽

Dimitrios Michelogiannakis

Keyword(s):

African American ◽

African Americans ◽

Orthodontic Treatment ◽

Mean Values ◽

Normal Occlusion ◽

History Of ◽

The Mean ◽

Gender Groups ◽

Overbite Depth Indicator ◽

White Patients

ABSTRACT Objectives: To examine normal Overbite Depth Indicator (ODI) and Anteroposterior Dysplasia Indicator (APDI) values in African Americans and to compare them with mean values from white patients. Secondary aims were to compare mean ODI and APDI values among different age, gender, and combined age-gender groups in African American patients. Materials and Methods: Lateral cephalometric radiographs of 160 African American patients (97 boys and 63 girls; age, 7 to 14 years) with normal occlusion and no history of orthodontic treatment were collected from the Bolton-Brush Growth Center. Cephalometric images were hand traced, and ODI and APDI values were assessed. Two-sample t tests were used to compare mean ODI and APDI values between African American and white patients; and between male and female African American patients. One-way analysis of variance, followed by the Tukey test, was used to compare mean ODI and APDI values among different African American age and combined age-gender groups. Results: Mean ODI and APDI values were significantly lower (P < .0001) in African American than white patients with normal occlusion and no history of orthodontic treatment. Mean ODI and APDI values increased with age in African American patients, and there were no significant gender differences. Conclusions: The mean ODI and APDI values in 7- to 14-year-old African Americans with normal occlusion and no history of orthodontic treatment were 70.9° and 78.1°, respectively, and were significantly lower than the mean values for white patients in the same age range.

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Mesiodistal angulation of the lateral teeth to the functional occlusal plane in normal occlusions

APOS Trends in Orthodontics ◽

10.4103/2321-1407.194794 ◽

2016 ◽

Vol 6 ◽

pp. 302-305

Author(s):

Hiroshi Ueda ◽

Morio Masunaga ◽

Kayo Horie ◽

Cynthia Concepcion Medina ◽

Kazuo Tanne

Keyword(s):

Young Adult ◽

Orthodontic Treatment ◽

Adult Patients ◽

Class I ◽

Occlusal Plane ◽

Reference Plane ◽

Length Discrepancy ◽

Normal Occlusion ◽

Mandibular Teeth ◽

Plaster Models

Introduction Crowding is a malocclusion with irregularly positioned teeth caused by arch length discrepancy (ALD). Its incidence is high compared with the various malocclusions. In a previous study the crowns of the maxillary lateral teeth had erupted mesially in relation to the functional occlusal plane (FOP) in patients with Angle Class I malocclusion and highly erupted canines, which had been uprighted by non-extraction orthodontic treatment, yet these results were based on only two cases evaluated by using plaster models. Therefore, the aim of this study was to assess the mesiodistal angulations of both maxillary and mandibular teeth relative to the FOP in normal occlusion by means of cephalograms and identifying the teeth axial factors contributing to the normal dentitions with the least ALD. Materials and Methods Thirty Japanese young adult patients (6 males, 24 females) with normal occlusion were selected to participate in this study; cephalograms were procured from each and the FOP was used as a reference plane for measuring the changes in the axial angulation along with other indicators of vertical growth. Results Progressive mesial tipping of the maxillary lateral teeth was observed. First premolars tended to express this more than the second premolars but the tipping values were roughly 90º relative to the FOP on the first molars. Conclusion The maxillary lateral teeth are more mesially angulated compared to the mandibular ones relative to the FOP. Furthermore, progressive mesial tipping of the maxillary lateral teeth was detected, of which axial angulations were significantly correlated to each other, in spite the mandibular premolars and molars being angulated in a similar fashion.

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Orthodontics

Oxford Assess and Progress: Clinical Dentistry ◽

10.1093/oso/9780198825173.003.0014 ◽

2019 ◽

Author(s):

Nicholas Longridge ◽

Pete Clarke ◽

Raheel Aftab ◽

Tariq Ali

Keyword(s):

Orthodontic Treatment ◽

Maxillofacial Surgery ◽

Oral And Maxillofacial Surgery ◽

Orthodontic Appliances ◽

Normal Occlusion ◽

Wide Range ◽

The Face ◽

Functional Appliances ◽

Fixed Appliances ◽

Removable Appliances

Orthodontics is ‘the specialty of dentistry concerned with growth of the face, the development of dentition, and the prevention and correction of occlusal anomalies. A malocclusion can be defined as ‘a deviation from the ideal that may be aesthetically or functionally unsatisfactory, with a wide range of occlusal traits’. Orthodontics is a constantly evolving specialty, with ever changing principles and techniques continuing to be developed. There has been huge progress in orthodontics in recent times, with changes in the types of brackets, archwire materials, and appliance systems (such as temporary anchorage devices and aligner technology). The key principles of orthodontics date back to 1899 when Edward Angle described ‘the key to a normal occlusion as the anteroposterior relationship between the upper and lower first molars’. In 1972, Lawrence Andrews described ‘six keys to an ideal static occlusion’. This was the basis of early orthodontic treatment planning. Knowledge of craniofacial development and growth is required as a foundation for understanding the aetiology of a patient’s malocclusion, to reach a diagnosis, and to plan orthodontic treatment. A basic understanding of the types of orthodontic appliances is beneficial (mainly fixed appliances, functional appliances, some use of removable appliances, and retainers). In addition to the management of a malocclusion, orthodontic treatment is often required in conjunction with other specialties, including oral and maxillofacial surgery, paediatric and restorative dentistry Key topics discussed in this chapter include: ● Fixed appliances ● Functional appliances ● Removable appliances ● Retention ● Index of treatment need ● Orthodontic assessment and diagnosis ● Cephalometric analysis ● Malocclusion ● Ectopic canines ● Dental anomalies.

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A Severe Reaction to Ni-Containing Orthodontic Appliances

The Angle Orthodontist ◽

10.2319/111507-531.1 ◽

2009 ◽

Vol 79 (1) ◽

pp. 186-192 ◽

Cited By ~ 13

Author(s):

Olga Elpis Kolokitha ◽

Evangelia Chatzistavrou

Keyword(s):

Orthodontic Treatment ◽

Previous History ◽

Orthodontic Appliances ◽

Severe Reaction ◽

Allergic Reactions ◽

Type Iv ◽

The Face ◽

History Of ◽

Allergic Contact ◽

Adult Female Patient

Abstract Exposure to nickel-containing orthodontic appliances may cause intra- or extraoral allergic reactions. Nickel is the most typical antigen implicated in causing allergic contact dermatitis, which is a Type IV delayed hypersensitivity immune response. This report presents an unusual reaction to nickel during the orthodontic treatment of an adult female patient. The patient had no previous history of allergy and had been wearing fixed metal upper appliances while in orthodontic treatment to assist the eruption of her impacted teeth. The adverse hypersensitivity reactions appeared only after the surgical exposure and included severe signs of eczematic and urticarial reactions of the face with redness, irritation, itching, eczema, soreness, fissuring, and desquamation as well as intraoral diffuse red zones. Diagnostic patch testing performed by the allergist revealed sensitization to nickel (++++ score). Treatment was achieved with nickel-free appliances.

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Perbedaan Analisis Sefalometri Skeletal Sebelum dan Sesudah Perawatan Alat Myofunctional pada Pasien Maloklusi Dentoskeletal Kelas II Divisi I dalam Masa Pertumbuhan dengan Metode Steiner

Majalah Sainstekes ◽

10.33476/ms.v4i2.906 ◽

2019 ◽

Vol 4 (2) ◽

Author(s):

Nugroho Ahmad Riyadi

Keyword(s):

Orthodontic Treatment ◽

Class Ii ◽

T Test ◽

Analytic Study ◽

Statistic Analysis ◽

Twin Block ◽

Normal Occlusion ◽

Division 1 ◽

Before And After ◽

Class Ii Division 1

The aim of orthodontics treatment is normalization of teeth position in three planes, using various orthodontics appliance to reach the chepalometric standar and normal occlusion. Orthodontic treatment for dentoskeletal class II division 1 malocclusion in growing patients using myofunctional appliance may correct anteroposterior planes of mandibula. This study was a descriptive retrospective analytic study to look at the success of Orthodontic treatment for dentoskeletal class II division 1 in growing patients with myofunctional appliance using chepalometrics analysis Steiner value. The sample used in this study is chepalogram radiographic from patient with dentoskeletal class II division 1 malocclusion in growing patients before and after using myofunctional appliance in PPDGS orthodontics Clinic of Padjadjaran University. Statistic analysis were performed with pair t-test and Wilcoxon. Based on this study, it is concluded that orthodontic treatment with myofunctional appliance such as activator and twin block in growing patient with dentoskeletal class II division 1 malocclusion shows significant changes and compatibility with the normal criteria.

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Nanomaterials Application in Orthodontics

Nanomaterials ◽

10.3390/nano11020337 ◽

2021 ◽

Vol 11 (2) ◽

pp. 337

Author(s):

Wojciech Zakrzewski ◽

Maciej Dobrzynski ◽

Wojciech Dobrzynski ◽

Anna Zawadzka-Knefel ◽

Mateusz Janecki ◽

...

Keyword(s):

Friction Force ◽

Material Properties ◽

Orthodontic Treatment ◽

Mechanical Characteristics ◽

Current Knowledge ◽

Scientific Work ◽

Orthodontic Appliances ◽

Orthodontic Movement ◽

Enamel Demineralization

Nanotechnology has gained importance in recent years due to its ability to enhance material properties, including antimicrobial characteristics. Nanotechnology is applicable in various aspects of orthodontics. This scientific work focuses on the concept of nanotechnology and its applications in the field of orthodontics, including, among others, enhancement of antimicrobial characteristics of orthodontic resins, leading to reduction of enamel demineralization or control of friction force during orthodontic movement. The latter one enables effective orthodontic treatment while using less force. Emphasis is put on antimicrobial and mechanical characteristics of nanomaterials during orthodontic treatment. The manuscript sums up the current knowledge about nanomaterials’ influence on orthodontic appliances.

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Arch Widths in Class II-2 Adults Compared to Adults with Class II-1 and Normal Occlusion

The Angle Orthodontist ◽

10.2319/062305-209 ◽

2007 ◽

Vol 77 (5) ◽

pp. 837-844 ◽

Cited By ~ 14

Author(s):

Joel Huth ◽

Robert Newton Staley ◽

Richard Jacobs ◽

Harold Bigelow ◽

Jane Jakobsen

Keyword(s):

Class Ii ◽

White Americans ◽

Gender Dimorphism ◽

Arch Width ◽

Normal Occlusion ◽

Division 1 ◽

History Of ◽

Division 2 ◽

Male Subjects ◽

Female Subjects

Abstract Objective: To compare (1) arch widths in adults with Class II division 2 (II-2), Class II division 1 (II-1), and Class I normal occlusions, (2) genders, (3) gender dimorphism, (4) differences between maxillary and mandibular arch widths, and to (5) develop adult norms for arch widths. Materials and Methods: Subjects were white Americans with no history of orthodontic treatment. Arch width dimensions measured were: intercanine, intermolar, and molar alveolar in both arches. Analysis of variance (ANOVA) and Duncan's test were used to compare groups. Results: Comparison of pooled genders showed the II-2 group had maxillary arch widths significantly smaller than the normal occlusions and significantly larger than the II-1 group. All groups had similar mandibular intercanine and alveolar widths. The II-2 and II-1 groups had similar mandibular intermolar widths, both significantly smaller than normal occlusions. The II-2 group had a maxillary/mandibular intermolar difference significantly smaller than the normal occlusions, and significantly less negative than the II-1 group. Gender comparisons in two of six widths showed normal and II-2 male subjects were similar, and in six of six widths normal and II-2 female subjects were similar; in five of six widths II-2 and II-1 male and female subjects were similar. Gender dimorphism occurred in five of six widths in normal occlusions, four of six widths in II-2, and one of six widths in II-1. Conclusions: Arch width dimensions of II-2 subjects were intermediate between normal and II-1 occlusions. In both Class II malocclusions, the process that narrows arch widths was more pronounced in male than in female subjects.

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PERCEPTION OF PEOPLE FOR POST- ORTHODONTIC RETENTION, NORTH GUJARAT POPULATION A QUESTIONNAIRE-BASED SURVEY

10.36106/ijsr/3928557 ◽

2021 ◽

pp. 1-4

Author(s):

vishwa Patel ◽

Ajay Kubavat ◽

Shrish Srivastava ◽

Manish Desai

Keyword(s):

Orthodontic Treatment ◽

Orthodontic Appliances ◽

Treatment Knowledge ◽

Level Of Knowledge ◽

Sociocultural Characteristics ◽

Logistic Regressions ◽

North Gujarat ◽

General Dentist ◽

Close Family ◽

Orthodontic Retention

Summary Objective: This transverse study aimed to know the level of knowledge and expectations amoung people for future orthodontic treatment have about post-orthodontic retention and to investigate the inuence of sociocultural characteristics. Material and methods: A total of 220 successive people participated in the study (as patient, parent, or legal guardian) for a prospective orthodontic treatment (mean age:17.7 years; 37.3 per cent male) received a questionnaire to assess their knowledge and expectations about postorthodontic retention before their rst appointment. Data were analysed descriptively, whereas predictors were identied with logistic regressions at Pvalue of less than or equal to 0.05. Results: Among the 220 responders, 54.09 per cent knew that retention appliances are used after orthodontic treatment and 45 per cent (n = 99) believed perfect results can guarantee stability, whereas at the same time, 48.8per cent (n = 106) knew that teeth can move on their own without any orthodontic appliances. The 35 per cent considered stability of the orthodontic result is important , some patient preferred removabl retainers (67.27 per cent; n = 148),some believed that the general dentist to be primarily responsible for a stable result (47.73 per cent; n = 105), and found it appropriate to charge for recall visits (59.55 per cent; n = 131). Participants’of the studys gender, age, education, nationality, and past orthodontic experiences within the close family signicantly inuenced answers. Limitations: a single-centred survey conducted in single university intense to conclude the interpretation of the results. Conclusions: Although stability of orthodontic treatment results is important to people deciding about a prospective orthodontic treatment, knowledge regarding the need for postorthodontic retention varies and may at times be contradictious for the ortho treatment. cultural factors seem to inuence the level of knowledge and the expectations on post-orthodontic retention.

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Clinical evaluation of the failure rate of metallic brackets bonded with orthodontic composites

Brazilian Dental Journal ◽

10.1590/s0103-64402012000400015 ◽

2012 ◽

Vol 23 (4) ◽

pp. 399-402 ◽

Cited By ~ 5

Author(s):

Fábio Lourenço Romano ◽

Rodrigo Alexandre Valério ◽

Jaciara Miranda Gomes-Silva ◽

José Tarcísio Lima Ferreira ◽

Gisele Faria ◽

...

Keyword(s):

Failure Rate ◽

Orthodontic Treatment ◽

Color Change ◽

Rank Test ◽

Initial Alignment ◽

Bond Failure ◽

Log Rank Test ◽

Significant Difference ◽

Mandibular Teeth

The purpose of the present study was to evaluate in vivo the failure rate of metallic brackets bonded with two orthodontic composites. Nineteen patients with ages ranging from 10.5 to 38.7 years needing corrective orthodontic treatment were selected for study. The enamel surfaces from second premolars to second premolars were treated with Transbond Plus-Self Etching Primer (3M Unitek). Next, 380 orthodontic brackets were bonded on maxillary and mandibular teeth, as follows: 190 with Transbond XT composite (3M Unitek) (control) and 190 with Transbond Plus Color Change (3M Unitek) (experimental) in contralateral quadrants. The bonded brackets were light cured for 40 s, and initial alignment archwires were inserted. Bond failure rates were recorded over a six-month period. At the end of the evaluation, six bond failures occurred, three for each composite. Kaplan-Meyer method and log-rank test (Mantel-Cox) was used for statistical analysis, and no statistically significant difference was found between the materials (p=0.999). Both Transbond XT and Transbond Plus Color Change composites had low debonding rates over the study period.

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