Effect of buccolingual inclinations of maxillary canines and premolars on perceived smile attractiveness

Xu, Hui; Han, Xianglong; Wang, Yanmin; Shu, Rui; Jing, Yan; Tian, Ye; Andrews, Will A.; Andrews, Lawrence F.; Bai, Ding

doi:10.1016/j.ajodo.2014.10.029

Cited by 19 publications

(22 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A recent study found that orthodontists prefer ranges of 0° to −7° of vestibulo-oral inclination for the canines and −3 ° to −11° for the bicuspids esthetically pleasing. For laypersons the values were +3 to −10° for the canines and +5 to −11° of inclination for bicuspids [ 4 ]. Our investigation appears to confirm that orthodontists prefer naturally occurring inclinations of teeth, in contrast to the lay population.…”

Section: Discussionmentioning

confidence: 99%

“…Although not the sole determinant [ 3 ] of smile aesthetics, the vestibulo-oral inclination of the canines and bicuspids, particularly in the upper jaw [ 4 ], play an important role for the smile aesthetics. Approximately 90 % of people show either the maxillary first and second premolar when smiling [ 5 ] and the vestibulo-oral inclination of the maxillary canines and bicuspids can influence the width of the buccal corridor [ 4 – 6 ]. The buccal corridor is defined as the space between the facial surfaces of the posterior teeth and the corners of the lips when smiling [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…However a number of commonly used bracket prescriptions apply negative torque to canines and bicuspids, causing oral inclination. A recent study by Xu et al, [ 4 ] however, investigating three dimensional digital models revealed a broad range of esthetic acceptability for vestibulo-oral inclinations of the maxillary canines and premolars. Vestibulo-oral inclination of crowns can be measured on study models or with Cone Beam Computed Tomography (CBCT) images.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vestibulo-Oral inclination of maxillary and mandibular canines and bicuspids - a CBCT investigation

et al. 2016

View full text Add to dashboard Cite

BackgroundThe aim of this retrospective study was to measure tooth and crowns axes of canines, first and second bicuspids of orthodontically untreated subjects with near normal occlusion to: 1. Define norms and reveal potential gender differences and 2. Discuss implications of the findings for orthodontics.MethodsThe CBCT-datasets of 167 patients, 56 males (mean age 28.63 years ± 11.99 years) and 111 females (mean age 29.72 years ± 11.47 years) were used. Tooth- and crown axes were measured for right and left sides. Normal distribution was evaluated with the Kolmogorov-Smirnov-test. For gender comparison independent t-Tests and for comparison of right and left sides a paired t-Test were used for normally distributed data. For data not following normal distribution for gender comparison the Mann-Whitney-U-Test was used and for data comparing the two sides the Wilcoxon signed rank test was applied.The level of statistical significance was set at p ≤ 0.05.ResultsMeasurement of tooth axes revealed buccal inclination for both genders with maximum values for maxillary and mandibular canines. Statistical significant differences were only found for maxillary canines (P = 0.025) and lower second bicuspids (P = 0.016) respectively. Values for crown axes revealed oral inclination for both genders with maximum values for maxillary first bicuspids and in the mandible for first and second bicuspids. No statistical significant differences were found between the genders apart from asymmetry for crown axes for the upper first bicuspids for males (P = 0.006) and females (P < 0.001).ConclusionsOur study reveals that irrespective of gender, oral inclination of the crowns of canines and premolars is the norm. The values of the most commonly used bracket prescriptions coincide with the average values found in our investigation. For esthetic reasons modifications of torque values can be considered.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vestibulo-Oral inclination of maxillary and mandibular canines and bicuspids - a CBCT investigation

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Indeed, they are involved in the occlusion stability, the mastication, and the smile esthetic. [ 3 4 ] However, there's very poor literature in the choice of material adequate for these teeth restoration by direct technique while they are the second group of teeth affected by the carious disease. [ 5 ] According to the literature, these teeth are more susceptible to non-carious cervical lesions.…”

Section: Introductionmentioning

confidence: 99%

Direct technique premolar coronal restorations: From metallic material to “complete adhesive restoration”

et al. 2019

View full text Add to dashboard Cite

Introduction: The choice of restorative materials has for a long time been determined by the tooth position. Thus, premolar restoration depended on the practitioner's clinical assessment and practical experience in regard to the material to be handled. Aim: The objective of this study was to assess, in the students' practice, the change in the choice of materials used for premolars restoration. Materials and Methods: This was a retrospective study based on the available care records in the department of conservative dentistry and endodontics of a dental school. Variables analyzed included the year of restoration, the type of material, the premolar position in the arch, and the coronal restoration site (occlusal, proximal, and cervical). Data collected were processed with the SPSS software version 22 (SPSS Inc., Chicago, IL, USA; 2013). The statistical significance threshold was set at 5% for Pearson's Chi-square test. Results: Between 1994 and 2017, 1738 restored premolars were identified. Over the years, amalgam restorations declined from 99.2% in 1994 to 1.3% in 2017, contrary to composite whose frequency increased from 0.6% to 88.6%. Maxillary premolars were exclusively restored with composite in 2017 when amalgam was still, somewhat, used for mandibular premolars. Conclusion: The reversal in the choice of materials in favor of composites reflects the global trend. This seems to be related to the current awareness of the prohibition, among others, of medical devices containing mercury.

show abstract

“…Figura 4.1 -Bráquete ....................................................................................................... 63 Tabela 5.3 -Análise estatística descritiva e comparação pareada de Tukey, da inclinação (graus), com momentos de torque de 5 Nmm,10 Nmm,15 Nmm,20 Nmm ..................................................................................... Um dos fatores responsáveis para o sucesso do tratamento ortodôntico, é o controle do movimento dentário nos três planos de espaço (Xu, et al, 2015). Para a obtenção desse controle, utiliza-se a ação mecânica das dobras de primeira, segunda, e terceira ordem, nos fios ortodônticos.…”

Section: Lista De Ilustraçõesunclassified

Avaliação da profundidade da canaleta dos bráquetes autoligados passivos associados à expressão do torque

Saraiva¹

View full text Add to dashboard Cite

Saraiva PC. Avaliação da profundidade da canaleta dos bráquetes autoligados passivos associados à expressão do torque [dissertação]. São Paulo: Universidade de São Paulo, Faculdade de Odontologia; 2016. Versão Corrigida. Um dos fatores responsáveis para o sucesso do tratamento ortodôntico é o controle do movimento dentário nos três planos do espaço. Nos bráquetes autoligados e préajustados, a inclinação dos dentes no sentido vestíbulo-lingual depende diretamente da interação bráquete/ fio. Sabendo-se da importância do controle do torque, o propósito deste estudo foi definir a folga entre bráquetes/ fio, avaliar o momento de torque, e correlacionar estes valores nos bráquetes autoligados passivos com profundidades de canaletas diferentes (Damon Q e H4). Para esta pesquisa foi confeccionado um dispositivo experimental em conjunto com uma máquina de testes universal (Model 5565, Instron, Canton, Mass) para medir a expressão do torque nos bráquetes ortodônticos. Para verificar se a difereça na profundidade das canaletas dos bráquetes interferiram na expressão do torque, foram realizadas análises de variância (ANOVA), e teste de Tukey (p<0,05) para identificar as diferenças entre os grupos. Os bráquetes H4 apresentaram maior folga entre bráquete/ fio, quando comparados aos bráquetes Damon Q. Ao avaliarmos o momento de força da expressão do torque, os bráquetes H4 e Damon Q apresentaram diferenças estatisticamente significantes apenas com 24º e 36º de torção. Após a análise dos resultados, ao comparar os valores da expressão de torque com 12º, 24º e 36º, observamos maior expressão de torque no bráquete Damon Q quando comparado ao bráquete H4; Observamos também que o Damon Q expressa melhor o torque quando comparado com o H4, com momentos de força de 5 Nmm, 10 Nmm, 15 Nmm e 20 Nmm.

show abstract

Effect of buccolingual inclinations of maxillary canines and premolars on perceived smile attractiveness

Cited by 19 publications

References 20 publications

Vestibulo-Oral inclination of maxillary and mandibular canines and bicuspids - a CBCT investigation

Vestibulo-Oral inclination of maxillary and mandibular canines and bicuspids - a CBCT investigation

Direct technique premolar coronal restorations: From metallic material to “complete adhesive restoration”

Avaliação da profundidade da canaleta dos bráquetes autoligados passivos associados à expressão do torque

Contact Info

Product

Resources

About