scholarly journals Inner Canthal Distance, Inter Pupillary Width, and Golden Proportion, as Predictors of Width of the Maxillary Central Incisors - An In Vivo Study

2021 ◽  
Vol 10 (22) ◽  
pp. 1650-1655
Author(s):  
Sanath Kumar Shetty ◽  
Prakyath Malli ◽  
Joana D’ Souza ◽  
Kamalakanth Shenoy ◽  
Surya Teja Chunduri ◽  
...  
Keyword(s):  
In Vivo Study ◽  
Central Incisor ◽  
Male And Female ◽  
Golden Proportion ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
Males And Females ◽  
The Mean ◽  
Female Subjects

BACKGROUND The mesio-distal width of anterior teeth can be determined by certain anthropometric measurements of face. The inter pupillary width is a facial landmark that is stable and does not modify after the age of 14 years. This study intended to determine if any relationship exists between inner canthal distances (ICD), inter-pupillary width (IPW), and golden proportion in determining the association between them and the maxillary central incisor width (CIW). METHODS 252 adult dentate subjects of age group 18 - 26 years who were free from dentofacial deformities were evaluated in the present in vivo study. The mesiodistal measurement of each maxillary central incisor, inner canthal distance (ICD), interpupillary width (IPW) was measured. The inner canthal distance of each subject was multiplied by a decreasing function of the geometric progression value (0.618) to provide the total width of two central incisors. The product was divided by 2 to get the width of a maxillary central incisor. A 't' test was used to establish significant differences if any in the mesiodistal width of the maxillary central incisors (CIW), inner canthal distance (ICD), and inter-pupillary width (IPW). Concurrence between the measured and calculated central incisor widths was evaluated using Pearson's correlation coefficients. RESULTS The mean ICD of male and female subjects was 33.03 ± 3.037 mm and 30.75 ± 2.89 mm, respectively. The mean IPW of male and female subjects was 62.26 ± 2.99 mm and 58.46 ± 2.73 mm, respectively. The mean CIW of male and female subjects was 19.98 ± 1.96 mm and 18.54 ± 1.87 mm, respectively. A high correlation was found between the measured and calculated width of central incisors (r=0.954 and r=0.974 in males and females). CONCLUSIONS There is a high positive correlation between ICD and CIW and it exists in the golden proportion. On the other hand, it was seen that the IPW and CIW were not in golden proportion. The mean of calculated CIW was significantly higher compared to the measured CIW in both males and females. ICD was seen as a significant factor in determining the CIW in males and females. All the facial and dental measurements were greater for men than for women; however, no significant differences were found between sexes with respect to ICD. KEY WORDS Inner Canthal Distance (ICD), Inter Pupillary Width (IPW), Central Incisor Width (CIW), Golden Proportion

scholarly journals A Clinical Study to Correlate the Facial Form and Maxillary Central Incisor Tooth Form in Males and Females of Davangere Population

2016 ◽  
Vol 04 (03) ◽  
pp. 156-164
Author(s):  
Deepak Bansal ◽  
Shruti Sharma ◽  
Manjit Kumar ◽  
Amrit Khosla
Keyword(s):  
Facial Appearance ◽  
Central Incisor ◽  
Incisor Tooth ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
The Face ◽  
Tooth Form ◽  
Males And Females ◽  
Selection Of ◽  
Made In

AbstractAn altered facial appearance is more difficult to face, than problems related to ill-fitting denture or eating. The selection of maxillary anterior teeth for complete denture has long posed problem in clinical practice and a controversy about the best method to employ still exists. An attempt is made in the present study to clinically correlate the face form with maxillary central incisor tooth form in males and females of Davangere population. In 1914, Leon William's projected the “the form method” where he classified facial forms as square, tapering, and ovoid. Maxillary central incisors were selected according to the facial forms.Of total 100 subjects four different tooth forms and face forms were evaluated. They are: square, ovoid, square-tapered, tapered. No significant correlation existed between face form in male and females. Females exhibited greater correlation between face forms and inverted tooth form but that correlation is not sufficient to serve as a guide for selection of anterior teeth.

scholarly journals A Comparative Analysis of Tooth Size Discrepancy between Male and Female Subjects Presenting with a Class I Malocclusion

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Eva Man Yee Leung ◽  
Yanqi Yang ◽  
Balvinder Khambay ◽  
Ricky Wing Kit Wong ◽  
Colman McGrath ◽  
...  
Keyword(s):  
Class I ◽  
Tooth Size ◽  
Male And Female ◽  
Mean Values ◽  
Southern Chinese ◽  
Size Discrepancy ◽  
Tooth Size Discrepancy ◽  
Males And Females ◽  
The Mean ◽  
Female Subjects

Objectives. To evaluate the tooth size discrepancy and Bolton’s ratios between male and female subjects with a Class I malocclusion. Materials and Methods. The digital e-models of 100 male and 100 female 12-year-old southern Chinese children with a Class I malocclusion were selected. The mesiodistal widths from permanent first molar to the contralateral side first molar of the upper and lower dentitions were measured. Differences between the tooth size discrepancy, together with the anterior and overall Bolton’s ratios between male and female subjects, were assessed using a two-sample t-test. A paired t-test was used to determine differences between antimetric pairs of teeth within the same arch. Results. Females had statistically significant smaller teeth than males (P < 0.05) except the upper left and lower left lateral incisor and lower left and right central incisors. The mean values of anterior Bolton’s ratios for males and females were 77.04 and 77.03, respectively (P > 0.05), while the mean values of overall Bolton’s ratios of male and female are 90.48 and 90.65, respectively (P < 0.05). The clinical significant differences (Cohen’s d > 0.2) for contralateral tooth size were shown on the maxillary canines, lateral incisors, and central incisors of males; and mandibular canines and lateral incisors of females. Conclusions. Southern Chinese females presenting with Class I malocclusions have smaller mesiodistal tooth dimensions compared to males. Both males and females presented several tooth size asymmetries. There are no statistical differences in anterior and overall Bolton’s ratios between the genders.

scholarly journals Anatomic crown length and mesio-distal width of maxillary central incisor teeth in Bangladeshi population

2013 ◽  
Vol 2 (1) ◽  
pp. 08-13
Author(s):  
Md Mahfuz Hossain ◽  
Mushfiq Hassan Shaikh ◽  
Md Mahfuzur Raihan ◽  
Md Asif Iqbal Khan
Keyword(s):  
Central Incisor ◽  
Crown Height ◽  
Maxillary Central Incisor ◽  
Anatomy And Physiology ◽  
Crown Length ◽  
Anterior Teeth ◽  
Dental Aesthetics ◽  
The Mean ◽  
Bangladeshi Population ◽  
Oral Anatomy

Background : Dimensions of teeth have been an excellent tool for determining clinically relevant aspects of dental aesthetics. Especially, the anterior teeth crown height and their mesio-distal widths are very important, because of their strategic anatomical position of being in the centre and in the front of the upper jaw. Objectives : The presented study was aimed to find the nominative data of the average anatomic crown height and mesio-distal width of maxillary central incisors of Bangladeshi population irrespective of age and sex. Methods : This observational study was carried out at Update dental college & Hospital. 110 typical extracted human maxillary central incisor teeth were collected randomly from the Oral Anatomy and Physiology Department of Update dental college and Sapporo dental college. Results : In this study it shows that maxillary central incisors’ average crown length is between  7.25 – 11.75 mm and the mean crown length is 10.37(SD±0.90) mm. The average mesio-distal width is between 9.00 – 13.00 mm and the mean mesio-distal width  is 8.51 (SD±0.62) mm. Conclusions : Apart from other specific and objective parameters related to dental aesthetics, these values of mesio-distal width and the length of the maxillary central incisors mentioned in this study will serve as guidelines for the diagnosis and treatment planning, especially in restorative dentistry, orthodontics and periodontal surgeries.DOI: http://dx.doi.org/10.3329/updcj.v2i1.13954 Update Dent. Coll. j: 2012; 2 (1): 08-13

A study on comparison of bleeding time and clotting time in young adult male and female subjects

2021 ◽  
Vol 18 (3) ◽  
pp. 05-09
Author(s):  
Ayesha Anjum ◽  
Keyword(s):  
Young Adult ◽  
Adult Male ◽  
Bleeding Time ◽  
P Value ◽  
Clotting Time ◽  
Male And Female ◽  
Young Adult Male ◽  
Males And Females ◽  
The Mean ◽  
Female Subjects

Background: Bleeding time is a laboratory test to assess the platelet function. It is dependent on various factors like function of platelets and pathway of coagulation. Clotting time is the time required for a sample of blood to clot in vitro under standard conditions. It is known from previous studies that there is a difference in the bleeding time and clotting time among males and females. The exact reasons for such differences have been postulated, but are insufficient. Therefore the aim of this study is to study and compare the gender differences in bleeding time and clotting time in young male and female subjects. Aims and objectives: The aim of this study is to determine and compare the differences in bleeding time and clotting time in young adult male and female subjects. Materials and Methods: This study was done in the Department of Physiology, Raichur Institute of Medical Sciences, Raichur. Sixty medical students studying in first year M.B.B.S, were selected for the study, out of which thirty were males, and thirty were females. Bleeding time was determined by Duke’s method and Clotting time was determined by Wrights Capillary tube method. Data was analysed using SPSS software. Unpaired ‘t’ test was used for comparing the values. p value less than 0.05 was considered significant. Result: The mean value of bleeding time in males was found to be,127.69±51,02 and in females it was 133.28±44.30. The mean of the CT in males was 212.18±60 and in females it was found to be 257.16±61.00.The mean BT and CT was significantly higher in females as compared to the males. Conclusion: It was found that there are differences in bleeding time and time in males and females, BT and CT were statistically more in females as compared to females.

scholarly journals Assessment of gingival sulcus depth, in primary, mixed and permanent dentition-Part-1

2017 ◽  
Vol 5 (2) ◽  
pp. 130
Author(s):  
Singh Shivani ◽  
K.L. Vandana
Keyword(s):  
Permanent Dentition ◽  
Primary Dentition ◽  
Mixed Dentition ◽  
In Vivo Study ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Age Range

Aim and objective: The objective of this in-vivo study was to evaluate toothwise and archwise sulcus depth in human primary, mixed and permanent dentition of Indian population.Method: The study included 40 subjects (22 males and 18 females) of an age range 4-25 years. Subjects were divided into 3 groups – the primary dentition (4-6 years) mixed dentition (7-13 years) and adult dentition (16-25 years). All the parameters were measured in upper and lower anterior segments.Results: Gingival sulcus depth (GSD) was measured archwise and toothwise in different dentitions and overall dentition wise without differentiating archwise and toothwise. GSD was significantly higher in maxillary mixed dentition (1.75±0.75) followed by permanent and primary dentition. In all the dentition, maxillary central incisor showed significant GSD.Conclusion: The sulcus depth is maximum in mixed dentition followed by primary and permanent dentitions and significantly higher in maxillary central incisor.

scholarly journals Determining the Center of Resistance of Maxillary Anterior Teeth Subjected to Retraction Forces in Sliding Mechanics

2007 ◽  
Vol 77 (6) ◽  
pp. 999-1003 ◽  
Author(s):  
Sheau Soon Sia ◽  
Yoshiyuki Koga ◽  
Noriaki Yoshida
Keyword(s):  
Tooth Movement ◽  
Anterior Tooth ◽  
Central Incisor ◽  
Clinical Factor ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
Sliding Mechanics ◽  
Retraction Force ◽  
Center Of Resistance

Abstract Objective: To determine the location of center of resistance and the relationship between height of retraction force on power arm (power-arm length) and movement of anterior teeth (degree of rotation) during sliding mechanics retraction. Materials and Methods: Three human subjects with maxillary protrusion were selected for this study. Initial tooth displacements of maxillary right central incisor under sliding mechanics with various heights of retraction forces were measured in vivo using a two-point three-dimensional displacement magnetic sensor device. By calculating the angle of rotation from the displacements measured, the location of the center of resistance was determined. Results: The results suggested that different heights of retraction forces could affect the direction of anterior tooth movement. The higher the retraction force was applied, the lower the degree of rotation (crown-lingual tipping) would be. The tooth rotation was in the opposite direction (from crown-lingual to crown-labial) if the height of the force was raised above the level of the center of resistance. Conclusion: The location of the center of resistance of the maxillary central incisor was approximately 0.77 of the root length from the apex. During anterior tooth retraction with sliding mechanics, controlled crown-lingual tipping, bodily translation movement, and controlled crown-labial movement could be achieved by attaching a power-arm length that was lower, equivalent, or higher than the level of the center of resistance, respectively. The power-arm length could be the most easily modifiable clinical factor in determining the direction of anterior tooth movement during retraction with sliding mechanics.

scholarly journals Esthetic Rehabilitation of a Fractured Permanent Maxillary Central Incisor by Reattachment

2016 ◽  
Vol 6 (1) ◽  
pp. 52-56
Keyword(s):  
Case Report ◽  
Surface Texture ◽  
Simple Procedure ◽  
Dental Trauma ◽  
Central Incisor ◽  
Fiber Post ◽  
Root Fracture ◽  
Maxillary Central Incisor ◽  
Crown Root ◽  
Anterior Teeth

ABSTRACT Crown fractures of the anterior teeth are a common form of dental trauma mainly affecting children and adolescents. One of the options for managing crown fractures is the reattachment of the fractured fragment when the tooth fragment is available with minimal or no violation of the biological width. Reattachment of fractured fragments can provide good esthetics, as it maintains the tooth's original anatomic form, color, and surface texture. It also restores function and is a relatively simple procedure. This case report deals with the esthetic management of a crown-root fracture that was successfully treated with endodontic treatment followed by reattachment of fractured fragment with fiber post. How to cite this article Shaikh SAH, Shenoy VU, Sumanthini MV, Pawar RB. Esthetic Rehabilitation of a Fractured Permanent Maxillary Central Incisor by Reattachment. J Contemp Dent 2016;6(1):52-56.

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