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.

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 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.

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 Management of non-vital anterior tooth with open apex by MTA apical plug -A case report.

2019 ◽  
Vol 9 (1) ◽  
pp. 42-45
Author(s):  
Fahd AA Karim ◽  
Kazi Hossain Mahmud ◽  
Asma Sultana ◽  
Shirin Sultana Chawdhari ◽  
Moktadir Hossain ◽  
...  
Keyword(s):  
Case Report ◽  
Clinical Examination ◽  
Root Canal ◽  
Radiographic Evaluation ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
The Right ◽  
Apical Area

A 15 year old boy was presented with pain in his upper anterior teeth. On clinical examination both the maxillary central incisor revealed slight discoloration and fracture of the crown. Radiographic evaluation revealed open apex of the left central incisor and apex of the right central incisor was fully developed. Apexification with MTA apical plug was carried out in left central incisor and conventional root canal treatment was done in right central incisor. In two months follow up both the tooth were clinically and radiographically asymptomatic and the healing of the apical area of the left central incisor was continued. These finding suggests that MTA can induce formation of apical barrier in the case of non-vital tooth with open apex. Update Dent. Coll. j: 2019; 9 (1): 42-45

Orthodontic treatment of impacted anterior teeth due to odontomas: a report of two cases

2004 ◽  
Vol 28 (4) ◽  
pp. 289-294 ◽  
Author(s):  
Puneet Batra ◽  
Ritu Duggal ◽  
Om Prakash Kharbanda ◽  
Hari Parkash
Keyword(s):  
Orthodontic Treatment ◽  
Clinical Evidence ◽  
Dental Trauma ◽  
Permanent Tooth ◽  
Radiographic Examination ◽  
Central Incisor ◽  
Anterior Teeth ◽  
First Case ◽  
History Of ◽  
The Right

Two cases are presented where the odontomas had caused the impaction of the anterior teeth and required a combined surgical and orthodontic treatment to bring these teeth into the arch. In the first case a large a complex odontome had caused the impaction of the right central incisor, lateral incisor and canine. In the second case a compound odontome blocked the eruption pathway of the right central incisor. It is emphasised that radiographic examination of all pediatric patients that present clinical evidence of delayed permanent tooth eruption or temporary tooth displacement with or without a history of previous dental trauma should be performed. Early diagnosis of odontomas allows adoption of a less complex and less expensive treatment and ensures a better prognosis.

scholarly journals Ten-Year Follow-Up of a Fragment Reattachment to an Anterior Tooth: A Conservative Approach

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Luiz Mendes ◽  
Laisa Laxe ◽  
Leandro Passos
Keyword(s):  
Treatment Plan ◽  
Tooth Bleaching ◽  
State University ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
Pulp Exposure ◽  
New Treatment ◽  
The Right

This report describes the 10-year follow-up data of a patient who underwent fragment reattachment to the maxillary central incisor after coronal fracture with pulp exposure as well as the procedures followed for functional and esthetic adjustments. A 9-year-old female patient presented at the clinic of dentistry at the State University of Rio de Janeiro with a coronal fracture and pulp exposure of the right maxillary central incisor that had occurred immediately after an accident. The intact tooth fragment was recovered at the accident site and stored in milk. The treatment plan followed was to perform direct pulp capping and tooth fragment reattachment. When the patient was 14 years old, adhesion between fragment and remaining tooth was lost, and fragment reattachment was performed. Five years later, the same tooth presented clinical discoloration and absence of sensitivity during pulp vitality tests. Subsequently, a new treatment plan was formulated, which included endodontic treatment, followed by nonvital tooth bleaching and light-cured composite resin restoration. An esthetic and natural-looking restoration was achieved. Tooth fragment reattachment is not a temporary restorative technique and requires functional and esthetic adjustments over time to maintain the biomimetic characteristics of traumatized anterior teeth and predictable outcomes.

scholarly journals Development of a Regression Model to Determine Tooth Size Dimensions from Finger Nail Beds- An Innovative Approach

2020 ◽  
Author(s):  
Soniya Joseph ◽  
Siddharth Gosavi ◽  
Karuna Gajanan Pawashe ◽  
Shivsagar Tewary ◽  
Pronob Sanyal ◽  
...  
Keyword(s):  
Regression Model ◽  
Index Finger ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Nail Bed ◽  
Finger Nail ◽  
Anterior Teeth ◽  
Selection For ◽  
Edentulous Patients ◽  
Little Finger

Introduction: Teeth selection is a crucial step and reflects the aesthetic quality of complete dentures and the prime responsibility to ensure their selection with maximum precision lies with the dentist. The anterior teeth reflect the overall aesthetic value of the denture, and hence the need to individualise maxillary anterior teeth was recognised, and the study was undertaken to find an alternative method of teeth selection. Aim: To establish an alternate/additional method of teeth selection for edentulous patients using extraoral landmarks. Materials and Methods: This observational cross-sectional study was conducted in School of Dental Sciences, Krishna Institute of Medical Sciences “Deemed To Be University”, Karad, Maharashtra for a time period of three months (April-June 2015). Dimensions of 402 maxillary central and lateral incisors were measured using a vernier caliper. The superior point selected was the gingival zenith of the teeth and the inferior point was the mid-point of the incisal edge. A line connecting these points determined the teeth length. Similarly, width was determined by marking the midpoint of the proximal surfaces and line connecting them. The points considered for recording the dimensions of the finger nail bed were the mid-points of the mesial and lateral surfaces of the nail bed and mid-points of the superior and inferior edges of the nail bed, respectively. The dimensions of maxillary right central incisor were correlated with the dimensions of right nail bed of index, ring and little finger. Similar procedure was followed for the left central incisor; left and right lateral incisors, respectively. The recorded data were statistically analysed using SPSS version 20 to find out Pearson’s correlation coefficient (r) between dimensions of maxillary incisors and finger nail beds. Further regression equation was derived to determine dimensions of maxillary incisors (dependent variable) from dimensions of nail beds (independent variables) for variables with significant correlations. The p-value less than or equal to 0.05 was taken significant. Results: In males, the central incisor length significantly correlated with little finger nail bed width (p=0.01*). The lateral incisor length had significant correlation with index finger nail bed width (p=0.03*), and little finger nail bed width (p=0.02*). The lateral incisor width had significant correlation with index finger nail bed width (p=0.01*). In females, the lateral incisor width had significant correlation with index finger nail bed width (p=0.01*) and ring finger nail bed length (p=0.002*). Further using the correlations for significant variables, regression formulae were developed. Conclusion: The regression model developed for male and female patients can be used to determine the dimensions of lateral incisor width in females, and central incisor length, lateral incisor length and width in males from the dimensions of index, ring and little fingers. The model stands true as a potential method of teeth selection for edentulous patients.

scholarly journals Occurrence of internal root resorption defects in anterior teeth with a history of concussion injury: A cross-sectional study among select adult North Indian dental patients

2020 ◽  
Vol 10 ◽  
pp. 7
Author(s):  
Rhythm Bains ◽  
Aseem P. Tikku ◽  
Promila Verma
Keyword(s):  
Root Resorption ◽  
Cross Sectional Study ◽  
Lateral Incisor ◽  
Central Incisor ◽  
Cross Sectional ◽  
Dental Patients ◽  
Anterior Teeth ◽  
History Of ◽  
The Difference ◽  
Time Of Presentation

Objectives: The aim of this study was to assess the frequency of internal resorption (IR) defects in select adult North Indian population with a history of concussion injury to their anterior teeth. Material and Methods: The study population consisted of patients reporting with a history of concussion injury to their anterior teeth. At least two intraoral periapical radiographs, one at central and other at a 20° horizontal angulation, were taken for each of the affected teeth to check for any IR defect. The radiographs were inspected after placing them over a viewing box using magnifying glasses. Percentage of IR defects and their occurrence on the basis of tooth type, duration of trauma, gender, and side was assessed. Results: A total of 1507 patients reported with a history of a traumatic dental injury (TDI) to their anterior teeth. About 37.1% (560/1507) patients and 602 teeth with TDI had a history concussion injury. The percentage of patients with concussion injuries resulting in IR defect was 3.3% (19/560), and the percentage of teeth with IR defect was 3.16% (19/602). About 68.42% (13/19) were in males, and 31.58% (6/19) were in females; however, the difference was not statistically significant (χ2 = 1.05, P = 0.590). Most of the patients reported with a history of TDI within 0–5 years back, and the median age at the time of presentation was 20 years. Maxillary left central incisor was most affected, 4.84% (9/186) followed by maxillary right central incisor 3.5% (7/200) mandibular left lateral incisor 3.85% (1/26), mandibular left central incisor 3.57% (1/28), and maxillary lateral incisor 1.52% (1/66). Out of the 19 IR defects, 15 (78.9%) were located in the root, four were located coronally (21.05%), out of which 2 had a pink-colored crown. Conclusion: Silent injuries such as concussion and subsequent IR can potentially weaken the tooth; therefore, follow-up of patients with a history of TDIs is vital to rule out any developing but obscure resorptive defects.

scholarly journals Multidisciplinary Approach for the Treatment of Horizontal Root-Fractured Maxillary Anterior Teeth

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Berkan Celikten ◽  
Ceren Feriha Uzuntas ◽  
Reza Safaralizadeh ◽  
Gulbike Demirel ◽  
Semra Sevimay
Keyword(s):  
Radiographic Examination ◽  
Maxillary Incisor ◽  
Central Incisor ◽  
Long Term Outcome ◽  
Root Fracture ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
Wide Range ◽  
Root Fractures ◽  
The Right

Dental trauma can lead to a wide range of injuries of which crown and root fractures are examples. Crown-root fractures often need complex treatment planning. This case report describes the use of MTA in the multidisciplinary management of a patient with a horizontally fractured central incisor and luxation in a different central incisor. A 42-year-old female patient presented within 1 h of receiving direct trauma to her maxillary area. Clinical examination revealed that the right and left maxillary central incisors presented mobility and sensitivity to percussion and palpation but no sensitivity to thermal stimulations. Occlusal displacement with extrusion in the left maxillary central incisor and luxation in the right maxillary central incisor was observed. Radiographic examination revealed horizontal root fracture at the apical third of the left maxillary central incisor. Root fracture in the right maxillary incisor was not observed. Endodontic and aesthetic restorative treatments were completed. MTA showed a good long-term outcome when used in root-fractured and luxated teeth. In addition, composite resin restoration provided satisfactory aesthetic results even after 15 months.

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