scholarly journals Hubungan antara diskrepansi ukuran gigi anterior rahang atas dan rahang bawah terhadap profil jaringan lunak wajah berdasarkan analisis BoltonThe correlation between maxillary and mandibular anterior size discrepancy and soft tissue facial profile based on Bolton analysis

2020 ◽  
Vol 32 (2) ◽  
pp. 132
Author(s):  
Andrian Fadhlillah Ramadhan ◽  
Gita Gayatri ◽  
Yuliawati Zenab
Keyword(s):  
Soft Tissue ◽  
Orthodontic Treatment ◽  
Sampling Method ◽  
P Value ◽  
Tooth Size ◽  
Facial Profile ◽  
Purposive Sampling ◽  
Size Discrepancy ◽  
Tooth Size Discrepancy ◽  
Anterior Ratio

Pendahuluan: Diskrepansi ukuran gigi dan profil wajah merupakan dua faktor yang membantu dalam proses penegakan diagnosis dan penentuan rencana perawatan ortodonti. Pengukuran diskrepansi ukuran gigi dapat dilakukan dengan analisis Bolton, analisis ini dapat menunjukkan rasio lebar mesiodistal antara gigi pada maksila dan gigi pada mandibula. Profil wajah dapat digunakan sebagai guideline dalam menentukan estetik wajah yang ingin dicapai setelah perawatan. Tipe profil wajah dapat diinterpretasi dari hasil fotografi ekstraoral, pada penelitian ini analisis Bolton yang dilakukan hanya meliputi rasio anterior saja. Penelitian ini bertujuan untuk menganalisis hubungan  antara diskrepansi ukuran gigi rahang atas dengan ukuran gigi rahang bawah berdasarkan analisis Bolton terhadap profil jaringan lunak wajah pada mahasiswa Fakultas Kedokteran Gigi Universitas Padjadjaran. Metode: Penelitian analitik observasional diawali dengan pengambilan sampel dengan teknik purposive sampling dan didapatkan 50 orang sampel mahasiswa Fakultas Kedokteran Gigi angkatan 2016 kemudian dilakukan analisis rasio anterior Bolton pada model studi dan interpretasi hasil foto profil ekstraoral. Uji korelasi Pearson dilakukan untuk mengetahui korelasi dari kedua variabel tersebut. Hasil: Rata-rata anterior ratio dari 50 orang sampel sebesar 79,53% ±2,61 dengan profil wajah lurus sebanyak 33 orang (66%) dan profil wajah cembung sebanyak 17 orang (34%) dengan rata-rata derajat konveksitas 172,11°. Uji korelasi Pearson menghasilkan nilai p-value (0,896) yang lebih besar dari α=0,05. Tidak ada korelasi yang signifikan antara diskrepansi ukuran gigi dan profil wajah. Simpulan: Tidak terdapat hubungan antara diskrepansi ukuran gigi dan profil wajah.Kata kunci: Analisis Bolton, diskrepansi ukuran gigi, profil wajah. ABSTRACTIntroduction: Tooth size discrepancy and facial profile are two crucial factors for helping diagnosis and treatment planning of orthodontic treatment. Bolton analysis could measure tooth size discrepancy; and the analysis result shows the ratio of mesiodistal width between maxillary and mandibular teeth. The facial profile could be used as a guideline for aesthetic result in orthodontic treatment. The facial profile can be analysed from an extraoral profile photograph. In this research, we only calculate the anterior ratio of the sample. The purpose of this study was to determine the correlation between maxillary and mandibular anterior size discrepancy and soft tissue facial profile of the students of the Faculty of Dentistry Universitas Padjadjaran based on Bolton analysis. Methods: The research was conducted with observational analytic methods. The sampling method was conducted using the purposive sampling method, which resulted in 50 samples taken from students of the Faculty of Dentistry Universitas Padjadjaran batch 2016. Analysis of the sample’s anterior ratio was measured on the study cast with Bolton analysis and interpretation of the extraoral profile photograph. Both variables (tooth size discrepancy and facial profile type) were then analysed with Pearson’s correlation test to determine the correlation between the two variables. Results: The average anterior ratio from 50 samples was 79.53% ± 2.61, and the most common facial profile type was straight/orthognathic, which was found in 33 samples (66%) followed by convex in 17 samples (34%) with average facial convexity was 172.11°. The result of Pearson’s correlation test showed that the p-value was 0.896, which was higher than α = 0.05. There was no significant correlation between tooth size discrepancy and soft tissue facial profile. Conclusion: There is no correlation between tooth size discrepancy and soft tissue facial profile.Keywords: Bolton analysis, tooth size discrepancy, facial profile.

scholarly journals Determination of Bolton Norms for Indian Population Sample

2017 ◽  
Vol 7 (1) ◽  
pp. 33-36 ◽  
Author(s):  
TV Pawan Kumar ◽  
Prasad Chitra
Keyword(s):  
Population Sample ◽  
Tooth Size ◽  
Mean Values ◽  
Class 1 ◽  
Size Discrepancy ◽  
Tooth Size Discrepancy ◽  
Anterior Ratio ◽  
Overall Ratio ◽  
Male Subjects

Introduction: Tooth size discrepancy varies between different ethnic groups and races. Bolton’s tooth size norms were originally determined in Caucasian population.Objective: To determine tooth size ratios for maxillary and mandibular dentition in Telangana population of Indian sample and to compare the ratios with standard Bolton norms.Materials & Method: The study sample comprised of 300 subjects (150 males and 150 females) aged between 14-25 years having Angle’s Class 1 molar relationship. Study models of all subjects were prepared and mesiodistal dimensions were measured to determine mean Bolton’s anterior ratio, overall ratio, over jet and overbite.Result: Evidence of sexual dimorphism was observed with Indian male subjects having greater mean values than the females. The determined mean for anterior tooth ratio was 80.88 ± 3.03%, overall tooth ratio 93.99 ± 3.11%, overjet 2.92 ± 0.62mm and overbite 2.96 ± 0.63mm. Statistically significant differences were found between Indian samples and Bolton Caucasian standards.Conclusion: The study provides evidence that tooth sizes are population specific. Mean values specific to particular population groups should be derived in order to make treatment planning more accurate and predictable.

scholarly journals FGF10 and FGF13 genetic variation and tooth-size discrepancies

2021 ◽  
Author(s):  
Guido Artemio Marañón-Vásquez ◽  
Alexandre Rezende Vieira ◽  
Luiza Vertuan dos Santos ◽  
Arthur Silva Cunha ◽  
Suyany Gabriely Weiss ◽  
...  
Keyword(s):  
Recessive Model ◽  
Permanent Teeth ◽  
P Value ◽  
Tooth Size ◽  
Nucleotide Polymorphisms ◽  
Increased Risk ◽  
Size Discrepancy ◽  
Orthodontic Patients ◽  
Tooth Size Discrepancy ◽  
Mandibular Teeth

ABSTRACT Objectives To explore whether variations in odontogenesis-related genes are associated with tooth-size discrepancies. Materials and Methods Measurements of the width of permanent teeth were obtained from dental casts of 62 orthodontic patients (age 15.65 ± 6.82 years; 29 males and 33 females). Participants were classified according to the anterior and overall Bolton ratios as without tooth-size discrepancy or with maxillary or mandibular tooth-size excess. Genomic DNA extracted from buccal cells was used, and 13 single nucleotide polymorphisms (SNPs) across nine genes were genotyped by polymerase chain reaction using TaqMan chemistry. χ2 or Fisher exact tests were applied to determine the overrepresentation of genotypes/alleles depending on the type of tooth-size discrepancy (α = .05; corrected P value: P < 5.556 × 10−3). Odds ratios (ORs) and their correspondent 95% confidence intervals (CIs) were also calculated to investigate the risk of this phenotype for the SNPs having significant association. Results Individuals carrying the FGF10 rs900379 T allele were more likely to have larger mandibular teeth (OR = 3.74; 95% CI: 1.65–8.47; P = .002). This effect appeared to be stronger when two copies of the risk allele (TT) were found (recessive model, OR = 6.16; 95% CI: 1.71–22.16; P = .006). On the other hand, FGF13 rs5931572 rare homozygotes (AA, or male A hemizygotes) had increased risk of displaying tooth-size discrepancies when compared with the common homozygotes (GG, or male G hemizygotes; OR = 10.32; 95% CI: 2.20–48.26; P = .003). Conclusions The results suggest that FGF10 and FGF13 may contribute to the presence of tooth-size discrepancies.

scholarly journals Tooth-size Discrepancy - An important diagnosis tool to measure the outcome of Orthodontic Treatment Completion: A Review

2013 ◽  
Vol 1 (1) ◽  
pp. 27-29
Author(s):  
Md. Nazmul Hasan ◽  
Shirin Sultana Chowdhury ◽  
Md. Ali Afzal Khan ◽  
Asma Taleb ◽  
Mohammad Mainul Hasan Abid
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Completion ◽  
Tooth Size ◽  
Dental Research ◽  
Size Discrepancy ◽  
Tooth Size Discrepancy ◽  
Diagnosis Tool

Bangladesh Journal of Dental Research & Education, Vol. 01, No. 01, January 2011, Page 27-29 DOI: http://dx.doi.org/10.3329/bjdre.v1i1.15799

Bolton tooth size discrepancy among different malocclusion groups in two different ethnic groups of Nepalese population

2021 ◽  
Vol 11 (1) ◽  
pp. 7-13
Author(s):  
Umesh Parajuli ◽  
Alok Kumar Jaiswal ◽  
Manish Bajracharya ◽  
Manju Pandey ◽  
Sapna Laxmi Tuladhar
Keyword(s):  
Ethnic Groups ◽  
T Test ◽  
P Value ◽  
Tooth Size ◽  
Study Materials ◽  
Tooth Width ◽  
Size Discrepancy ◽  
Anterior Ratio ◽  
Overall Ratio ◽  
And Gender

Introduction: The tooth size ratios may vary among different ethnic groups and different malocclusion groups. The objective of this study is to see the tooth size discrepancies in two major ethnic groups of Nepal; Indo-Aryans and Tibeto-Burmans and different malocclusion groups and compare it with the Bolton’s study. Materials and Method: The anterior and overall ratios were compared between Indo-Aryans and Tibeto-Burmans according to different malocclusion groups with Bolton’s study with one sample t-test. The differences in ratios in ethnic groups and gender were seen with one sample t-test. The differences in mesio-distal tooth width amongst the two ethnic groups were seen. One sample ANOVA was used to see any correlation between the ethnic groups and the different malocclusion groups. Result: The anterior ratio and overall ratio in Indo- Aryans and Tibeto-Burmans in all the malocclusion groups were greater than the Bolton’s study but was not statistically significant. There was significant differences in anterior ratio between Indo-Aryans (77.63 + 2.74%) and Tibeto-Burmans (78.51 + 2.76%), p value= 0.024. There were no statistical significant differences in the anterior and overall ratio amongst males and females. The mesio-distal tooth size was greater in Tibeto-Burmans as compared to Indo-Aryans expect for maxillary right and left central incisors. Conclusion: The Tibeto-Burmans had higher anterior ratio as compared to Indo-Aryans. The Tibeto-Burmans had broader teeth as compared to Indo-Aryans except for maxillary central incisors.

scholarly journals Bolton’s Tooth Size Discrepancy in Malaysian Orthodontic Patients: Are Occlusal Characteristics Such as Overjet, Overbite, Midline, and Crowding Related to Tooth Size Discrepancy in Specific Malocclusions and Ethnicities?

2018 ◽  
Vol 8 ◽  
pp. 36-43 ◽  
Author(s):  
Priti Subhash Mulimani ◽  
Myra Innessa Binti Azmi ◽  
Nabilah Rashida Jamali ◽  
Nur Najaa Binti Md Basir ◽  
Htoo Htoo Kyaw Soe
Keyword(s):  
Tooth Size ◽  
Class Iii ◽  
Midline Shift ◽  
Entire Study ◽  
Significant Difference ◽  
Size Discrepancy ◽  
Orthodontic Patients ◽  
Tooth Size Discrepancy ◽  
Anterior Ratio ◽  
Overall Ratio

Introduction Tooth size, occlusal traits, and ethnicity are closely interrelated, and their impact on desirable orthodontic treatment outcome cannot be underestimated. This study was undertaken to assess the occlusal characteristics and ethnic variations in occlusion of Malaysian orthodontic patients and evaluate their correlation with Bolton’s tooth size discrepancy. Materials and Methods On 112 pretreatment study models of orthodontic patients, molar relationship, overjet, overbite, spacing, crowding, midline shift, and Bolton’s ratios were assessed. ANOVA, one-sample t-test, Chi-squared test, and Spearman’s rho correlation coefficient were used for statistical analysis. Results Significant difference between anterior ratio of our study and Bolton’s ideal values was found, for the entire study sample and Chinese ethnic group. Differences between races and malocclusion groups were not statistically significant (P > 0.05). Significant correlations were found as follows – in Angle’s Class I malocclusion between 1) anterior ratio and overbite, 2) overall ratio and maxillary crowding and spacing; in Angle’s Class II malocclusion between 1) anterior ratio and overjet and midline shift, 2) overall ratio and mandibular crowding; in Angle’s Class III malocclusion between 1) anterior ratio and mandibular crowding and both maxillary and mandibular spacing 2) overall ratio and mandibular crowding. Conclusions Significant differences in anterior ratio and Bolton’s ideal values for the Malaysian population were found, indicating variations in anterior tooth size as compared to Caucasians. Statistically significant correlations existed between Bolton’s ratios and occlusal traits. These findings can be applied clinically in diagnosis and treatment planning by keeping in mind the specific discrepancies that can occur in certain malocclusions and addressing them accordingly.

scholarly journals Tooth extractions in Orthodontics: first or second premolars?

2019 ◽  
Vol 24 (3) ◽  
pp. 88-98 ◽  
Author(s):  
Telma Martins de Araújo ◽  
Luciana Duarte Caldas
Keyword(s):  
Class I ◽  
Skeletal Maturation ◽  
Tooth Size ◽  
Facial Profile ◽  
Anterior Crowding ◽  
Patient Cooperation ◽  
Size Discrepancy ◽  
Tooth Size Discrepancy ◽  
Bimaxillary Protrusion ◽  
Tooth Extractions

ABSTRACT Tooth crowding and protrusions demand rigorous attention during orthodontic planning that includes the extraction of first and second premolars. Some characteristics, such as dentoalveolar bone discrepancies, maxillomandibular relations, facial profile, skeletal maturation, dental asymmetries and patient cooperation, are important elements of an orthodontic diagnosis. This study discusses the options of treatments with extractions and describes the correction of a Class I malocclusion, bimaxillary protrusion, severe anterior crowding in both dental arches and tooth-size discrepancy, using first premolar extractions.

scholarly journals Thresholds for Clinically Significant Tooth-Size Discrepancy

2009 ◽  
Vol 79 (4) ◽  
pp. 740-746 ◽  
Author(s):  
Toshiya Endo ◽  
Kenji Uchikura ◽  
Katsuyuki Ishida ◽  
Isao Shundo ◽  
Kosuke Sakaeda ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Clinical Significance ◽  
Tooth Size ◽  
Class Iii ◽  
Size Discrepancy ◽  
Tooth Size Discrepancy ◽  
Clinically Significant ◽  
Anterior Ratio ◽  
Overall Ratio ◽  
Large Groups

Abstract Objective: To determine an appropriate threshold for clinically significant tooth-size discrepancy using both a Bolton standard deviation (SD) definition and a millimetric definition. Materials and Methods: Mesiodistal tooth widths were measured in 250 pretreatment dental casts of patients with Class I, Class II, and Class III malocclusions. The anterior and overall ratios and the required amount of maxillary and mandibular corrections were calculated. The casts were divided into small, normal, and large groups according to the anterior and overall ratios categorized by the Bolton SD definition, and into small, normal, and large groups according to the required amount of maxillary and mandibular corrections expressed in millimeters. Results: The small and large anterior ratio groups which fell under the category of the 2 SD threshold did not always need maxillary or mandibular corrections greater than 2 mm, while the small and large overall ratio groups always needed maxillary and mandibular corrections greater than 2 mm. The small and large maxillary correction groups in the 2 mm threshold category did not always have anterior or overall ratios greater than 2 SDs from the Bolton mean. However, the small and large mandibular correction groups always had anterior ratios greater than 2 SDs and did not always have overall ratios greater than 2 SDs. Conclusions: The tooth-size discrepancies could be better expressed in terms of both percentage and actual amount of millimeters required for correction. The ratios outside 2 SDs from the Bolton mean and the discrepancies requiring more than 2 mm of maxillary and/or mandibular corrections are recommendable as the appropriate thresholds for clinical significance.

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