scholarly journals Analysis of maxillary anterior teeth proportion in relationship with lower facial height and malocclusion

2017 ◽  
Vol 13 (2) ◽  
pp. 262-267
Author(s):  
Rajesh Gyawali ◽  
Varun Pratap Singh
Keyword(s):  
Golden Ratio ◽  
Lateral Incisor ◽  
Digital Measurement ◽  
Central Incisor ◽  
Class Iii ◽  
Maxillary Canine ◽  
Dental Esthetics ◽  
Anterior Teeth ◽  
Facial Height ◽  
Significant Difference

Background & Objectives: Maxillary anterior tooth to tooth proportion has a special value in dental esthetics. This study aimed to assess the apparent proportion of maxillary anteriors and possible association with lower anterior facial height and malocclusion type. Materials & Methods: One-hundred and sixty samples with well aligned maxillary dentition were selected and the lower anterior facial height was measured with digital caliper. Molar relationship was examined and intraoral frontal photograph was taken for digital measurement of tooth proportion. The ratio of maxillary canine to lateral and lateral to central incisors were measured and compared between gender and the sides. These ratios were further compared among various malocclusion type using ANOVA and its association with lower anterior facial height was evaluated with Pearson’s correlation.Results: Most of the samples had Class I molar relationship (70%) followed by Class II (23%) and Class III (7%). The mean lower anterior facial height was 62.82mm and ratio of maxillary lateral to central incisor and canine to lateral incisor was 0.68 and 0.76 respectively. No statistically significant difference was found when the ratio was compared between the gender and the sides. These ratios were statistically different from the golden ratio and has no significant correlation with lower anterior facial height. These mean ratios were also found similar across the malocclusion type.Conclusion: Ratio of apparent dimension of maxillary canine to lateral incisor and lateral to central incisor was different from the golden ratio and showed no association with lower anterior facial height and malocclusion type.

scholarly journals Management Of Mandibular Lateral Incisor Agenesis With Skeletal Class III Malocclusion by Space Closing Technique

2018 ◽  
Vol 1 (2) ◽  
pp. 93
Author(s):  
Fidiyah Inayati ◽  
I Gusti Aju Wahju Ardani
Keyword(s):  
Lateral Incisor ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Anterior Crowding ◽  
Skeletal Class ◽  
Dental Esthetics ◽  
Skeletal Malocclusion ◽  
Anterior Teeth ◽  
Space Closure ◽  
Closure Method

Background: Patients with congenital absence of a mandibular lateral incisor are often found having difficulty in achieving adequate functional occlusion. It may affect esthetics, mastication, speech, and occlusal balance. Purpose: This paper reported an agenesis treatment of one mandibular lateral incisor case using a space closure method. Case: A twenty-three years old female patient with agenesis of tooth 42, mandibular anterior crowding, multiple diastema on mandibular anterior teeth, and skeletal class III malocclusion. Case Management: Space closure method was chosen to correct the agenesis by considering the class III skeletal malocclusion and multiple diastema condition. Conclusion: Space closure method treatment improved the patient’s facial and dental esthetics, and it provided a good functional occlusion, despite the absence of a mandibular lateral incisor, which generally impairs the adequate incisal guidance.

scholarly journals Unilaterally impacted maxillary central incisor and canine with ipsilateral transposed canine-lateral incisor

2013 ◽  
Vol 83 (5) ◽  
pp. 920-926 ◽  
Author(s):  
Po-Sung Fu ◽  
Jen-Chyan Wang ◽  
Yi-Min Wu ◽  
Ta-Ko Huang ◽  
Wen-Cheng Chen ◽  
...  
Keyword(s):  
Functional Outcomes ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Treatment Results ◽  
Maxillary Canine ◽  
Clinical Issue ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
Maxillary Lateral Incisor ◽  
Treatment Alternatives

ABSTRACT Concurrent impaction and transposition of maxillary anterior teeth is uncommon and poses a challenge for dentists. Early diagnosis and management of eruption disturbances benefits esthetic and functional outcomes. This article describes the treatment of a teenager who had impactions of the left maxillary central incisor and canine as well as ipsilateral canine-lateral incisor transposition. Treatment alternatives and effective orthodontic techniques are delineated. To optimize the treatment results, the impacted maxillary canine was surgically exposed and orthodontically distalized with an innovative cantilever. Subsequently, the deeply impacted maxillary central incisor was uncovered and orthodontically mesialized into the arch. Finally, the displaced maxillary lateral incisor was brought into its normal position. The combined surgical-orthodontic approach resolved a difficult clinical issue and avoided additional restorations. An esthetic, functional outcome was achieved and satisfied the patient.

Comparative assessment of odontometric parameters for gender determination: A hospital based cross-sectional study

2021 ◽  
Vol 8 (3) ◽  
pp. 147-152
Author(s):  
Mosmi Lomi ◽  
Jonathan Daniel M
Keyword(s):  
Sexual Dimorphism ◽  
Cross Sectional Study ◽  
Mean Value ◽  
The Body ◽  
Central Incisor ◽  
Maxillary Canine ◽  
Cross Sectional ◽  
Mean Values ◽  
Gender Determination ◽  
Significant Difference

Determining gender is one of the most important procedure in forensics. Teeth are made of the most enduring mineralized tissues in the body, as such, they have an extraordinary resistance to putrefaction and the effects of external agents (physical, thermal, mechanical, chemical or biological) which makes them invaluable material for anthropological, genetic, odontologic and forensic examinations.i)To assess the degree of sexual dimorphism in maxillary canine using maxillary canine index, maxillary first molar and central incisor using mesiodistal (MD) and buccolingual/buccopalatal (BL) dimensions of the crown. ii) To determine the accuracy of maxillary canine index, first molar and central incisor dimensions (mesiodistal and buccolingual/buccopalatal) in determining sex.This study consisted of total 30 participants (males=15, females=15) of age group ranging from 20 to 35 yrs. Measurement of dimensions of selected teeth were performed on maxillary cast using digital Vernier caliper, resolution 0.01mm. Data thus obtained were analyzed statistically.The mean values of all the measurements in males were greater than females. There was statistical significant difference in mean value of bucco-lingual width of molar, mesiodistal width of canine (on left side, right side and average) and the inter-canine distance between males and females. The buccolingual width of molar showed the highest % of sexual dimorphism (5.33%) and the mesiodistal width of molar showed the least % of dimorphism (0.7%). Bucco-lingual width of molar posed the highest prediction accuracy for gender determination. We conclude that buccolingual width of maxillary first molar can be used to predict the gender when only teeth of maxillary arch are available for forensic examination.

scholarly journals Nepalese Esthetic Dental (NED) Proportion in Nepalese Population

2017 ◽  
Vol 13 (3) ◽  
pp. 244-249 ◽  
Author(s):  
D. Rokaya ◽  
J. Kitisubkanchana ◽  
A. Wonglamsam ◽  
P. Santiwong ◽  
T. Srithavaj ◽  
...  
Keyword(s):  
Total Population ◽  
Dental Treatment ◽  
Central Incisor ◽  
Golden Proportion ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Golden Standard ◽  
Different Populations ◽  
Facial Types ◽  
One Way Anova

Background Lots of studies on maxillary anterior teeth proportions have been studied in different populations in various countries, but no studies have been conducted in Nepal on the esthetic maxillary anterior teeth proportions.Objective The study was done to investigate the maxillary anterior teeth proportions in a Nepalese population. Teeth proportions in the total population were compared with golden proportion (GP) and golden standard (GS).Method A total of 150 Nepalese subjects were divided in three facial types; broad, average and narrow group. Maxillary anterior teeth were measured from dental casts using digital calipers. The perceived width ratios of lateral to central incisor (LI/CI) and canine to lateral incisor (CN/LI), ratios of mean central incisor length to 2 central incisor widths (CIL/2CIW), and actual width to length ratios (WLRs) (%) were calculated in each facial type and compared. Mean LI/CI, CN/LI and CIL/2CIW in total population were calculated and compared with GP (0.618), and mean WLRs in the total population were compared with GS (80%). All teeth proportions were compared among three facial types. One-sample t-test and one-way ANOVA were performed to analyze the data (α = 0.05).Result The LI/CI, CN/LI, CIL/2CIW and WLRs in three facial types showed no significant difference. The LI/CI, CN/LI and CIL/2CIW in the total population were 66%, 70% and 55% respectively, and were significantly different from GP. The WLRs for CI, LI and CN in the total population were 90%, 86% and 89% respectively and significantly differed from GS. These values were considered to constitute the Nepalese Esthetic Dental (NED) proportion.Conclusion No significant difference of maxillary anterior teeth proportions were observed among three facial types. Teeth proportions in the total population significantly differed from GP and GS. We propose the NED proportion as a guideline for dental treatment in the maxillary anterior region in Nepalese populations.

scholarly journals Validity of mathematical proportions in maxillary anterior teeth among Bangladeshi population

2017 ◽  
Vol 7 ◽  
pp. 41-48 ◽  
Author(s):  
Monwarul Aziz ◽  
Md. Zakir Hossain
Keyword(s):  
Sample Selection ◽  
Dental Students ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Golden Proportion ◽  
Anterior Teeth ◽  
Age Limit ◽  
Bangladeshi Population ◽  
Natural Dentition ◽  
Dentofacial Orthopedics

Objective To investigate the existence and suitability of mathematical proportions between the widths of maxillary anterior teeth in Bangladeshi population having an esthetic smile, with the aid of digital photographs and computer analysis. Place of Study The study was conducted at the Department of Orthodontics and Dentofacial Orthopedics of Dhaka Dental College and Hospital, Dhaka. Period of Study The study was conducted from April 2016 to September 2016. Sample Selection The study samples collected from Students of Dhaka Dental College, Mirpur-14, Dhaka, Bangladesh, with age limit 18–35 years. Materials and Methods Standardized frontal images of 100 dental students of Dhaka Dental College were captured. All the images were downloaded to a personal computer, and width of each tooth was measured by the scale tool of Photoshop CS version 8.0. All the data were analyzed (through standard statistical method) using Statistical Package for Social Science Software version 20 (IBM Corp., USA). Results The golden proportion existed in 17% of the perceived width ratios of lateral incisor to central incisor and 4% of the width ratios of canine to lateral incisor in natural dentition. Sixty-six percent lateral incisors are following the golden percentage, but only 7% central incisors and 21% canines are following the golden percentage. The recurring esthetic dental (RED) proportion existed in only 4% of participants. Conclusions The golden proportion, golden percentage, and the RED proportion cannot be used as constant proportions to create a harmonious proportion throughout the width of maxillary anterior teeth. The adjusted golden percentage might serve as a guideline to create harmonious proportions in maxillary anterior teeth for Bangladeshi population.

scholarly journals ASSESSMENT OF MEAN DISTANCE BETWEEN CENTRAL INCISOR AND INCISIVE PAPILLA WITH RESPECT TO STANDARDIZED ARCH FORM IN DENTATE SUBJECTS

2021 ◽  
Vol 12 (1) ◽  
pp. 9-16
Author(s):  
Ussamah Waheed Jatala ◽  
Anam Fayyaz Bashir ◽  
Nazia Yazdanie
Keyword(s):  
Central Incisor ◽  
Arch Form ◽  
Anterior Teeth ◽  
Significant Difference ◽  
The Mean ◽  
Edentulous Patients ◽  
Arch Forms ◽  
Age Range ◽  
Best Fit ◽  
Maxillary Arch

BACKGROUND & OBJECTIVE: Edentulous patients require accurate positioning of artificial maxillary anterior teeth in complete dentures to recover the esthetic and phonetic characteristics. This positioning is guided by measuring distance between central incisor (CI) and incisive papilla (IP) in dentate subjects which varies according to the ovoid, square and tapered maxillary arch forms. Objectives: 1- To determine the frequency of three different arch forms in dentate patients; 2- To assess the mean distance between central incisor and incisive papilla in each of the three maxillary arch forms. METHODOLOGY: 130 cases were selected by non-probability consecutive sampling, which included both genders and age range of 20-40 years. Impressions of maxillary arches were recorded and their casts photocopied. Arch form template was used to standardize the assessment of arch forms by best-fit method on the photocopies. The distance between mesio-incisal edge of CI and posterior border of IP was measured with digital verniercalipers (SparkFun,Colorado). RESULTS: Out of 130 subjects, 54 males and 76 females were present. The ovoid arch form was the most frequent form recorded at 67% (n=87) while the tapered arch was the least at 14% (n=18). The overall mean distance between central incisor (CI) and incisive papilla (IP) was 11.34mm (7.58mm - 16.45mm). The mean distance was the highest for ovoid arch form (11.58mm) and lowest for square (10.49) with a statistically significant difference (p=0.016) between the two arch forms. CONCLUSION: The ovoid arch was the most frequent arch form found in dentate subjects. The mean distance recorded was highest for ovoid arch followed by tapering arch and least for square arches.

scholarly journals Aesthetic Principles of the Upper Front Teeth: Application of Golden Proportion (Levin) and Golden Percentage (Snow)

2013 ◽  
Vol 59 (1) ◽  
pp. 25-27 ◽  
Author(s):  
Emese Rita Markovics ◽  
Kinga Jánosi ◽  
Carmen Biriș ◽  
Diana Cerghizan ◽  
C Horga ◽  
...  
Keyword(s):  
Computer Program ◽  
Ethnic Differences ◽  
Digital Images ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Golden Proportion ◽  
Digital Photographs ◽  
Anterior Teeth

Abstract Objective: The objective of our work is to examine the presence of the much-discussed golden proportion provided by Levin, and of the golden percentage (Snow), on the widths of maxillary anterior teeth, by measurements made on digital images. Material and method: The material of this study consists of digital photographs taken of subjects with natural and esthetic teeth. We took photos of 68 subjects (35 women and 33 men), between 19 and 26 years. Using a computer program, we made the necesarry measurements, then we made the appropriate calculations of the above theories. Results: The golden proportion between the lateral and central incisor occurs in a higher proportion than between the canine and the lateral incisor. The values obtained by analyzing the golden proportion differ slightly from those proposed by Snow. Conclusions: The frequency of the golden proportion is not significant for the groups of teeth mentioned. With small modifications and taking into consideration ethnic differences, Snow's golden percentage is more valid and applicable than Levin's golden proportion is.

scholarly journals Effect of Subject Rotation on Assessment of Esthetic Dental Ratios: A Simulation Study

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Rajesh Gyawali ◽  
Prabhat Ranjan Pokharel ◽  
Jamal Giri
Keyword(s):  
Simulation Study ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Anterior Teeth ◽  
Acceptable Range ◽  
Zero Degree ◽  
The Right ◽  
Substantial Change

Objective. This study aimed to find out the change in esthetic ratios during rotation of patient’s head using a simulation.Materials and Methods.A plaster study model was photographed placing its midline along the long axis of the camera. Then a series of photographs were taken by rotating the model each degree till 10° on both right and left sides. These photographs were digitally measured and the ratio of the maxillary anterior teeth at zero-degree rotation was compared with that at various degrees of rotation.Results. As the model was rotated to the right side till 10°, the ratio of the right lateral to central incisor gradually decreased while the ratio of the left lateral to central incisor gradually increased. However, the ratio of the canine to lateral incisor on both sides gradually increased. Similar results were obtained when the model was rotated to the left side. The ratio of the lateral to central incisor deviated from the acceptable range (±10%) when there was rotation of more than 7°, whereas the ratio of the canine to lateral incisor was within the acceptable range till 10° rotation on either side.Conclusions. Rotation of the model by more than 7° leads to a substantial change in the esthetic ratio.

scholarly journals Management of a Class I malocclusion with traumatically avulsed maxillary central and lateral incisors

2018 ◽  
Vol 89 (4) ◽  
pp. 661-671
Author(s):  
Nesrine Z. Mostafa ◽  
Anthony P. G. McCullagh ◽  
David B. Kennedy
Keyword(s):  
Treatment Approach ◽  
Class I ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Deep Bite ◽  
Maxillary Central Incisor ◽  
Orthodontic Space Closure ◽  
Anterior Teeth ◽  
Space Closure ◽  
The Right

ABSTRACT This case report describes orthodontic space closure for managing an avulsed maxillary central incisor and a lateral incisor in a growing girl with a Class I deep bite malocclusion with moderate lower and mild upper crowding. The treatment approach moved a central incisor across the midline and substituted a lateral incisor for a central incisor, in combination with canine substitution. Veneers on all maxillary anterior teeth attained acceptable esthetics. The right central incisor was moved to serve as the avulsed left central incisor. The right lateral incisor was moved to the position of the right central incisor and restored. The canines on both sides were substituted as lateral incisors; the posterior occlusion was left in Class II. Mesialization of central and lateral incisors with prosthetic rehabilitation is an acceptable treatment option.

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