Relationship of Dental Arch Dimensions with Cephalic and Facial Indices (original) (raw)
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The Journal of Indian Orthodontic Society, 2013
Background and objectives: The present study is conducted to ascertain whether or not Pont's Index can be used reliably on Maratha individuals and if not, to establish the norms for the same. A mathematical model is also presented to individualize the nature of arch form. Materials and methods: Full mouth dental cast of 60 patients between ages 18 and 25 years were obtained belonging to Maharashtra and traced back to two generations. The different formulae were used to determine the premolar and molar indices of the maxillary arch width by using the sum of incisal widths of maxilla or mandible. Mathematical model was determined using fourth order polynomial. Results: Mean and standard deviation of premolar arch width and molar arch width for male is 37.59 ± 1.76 and 48.15 ± 2.16 and for females, it is 35.61 ± 1.66 and 46.12 ± 2.06 respectively. The premolar and molar indices derived from sum of maxillary incisors (SI max) are 80.29 ± 5.39 and 62.66 ± 4.0 for males and 82.33 ± 4.02 and 63.6 ± 3.62 for females respectively. The polynomial indicated that the arches were symmetrical. The arch dimensions showed variations in males and females. Conclusion: Significant correlation was found between the sum of maxillary incisors and interpremolar width but not with the intermolar width while sum of mandibular incisors showed significant correlation with the interpremolar and intermolar arch width. There is no single arch form unique to any of the ethnic groups. A new formula is proposed to determine the premolar and molar index.
Pakistan Journal of Medical and Health Sciences
Objective: To determine the factors of maxillary arch dimension of students aged 18–25 years in the prosthetic department at Bhittai Dental and Medical College Methods: This cross-sectional study was done at the prosthetic department at Bhittai Dental and Medical College, MirpurKhas. All the students having Class I canine and molar relationships; well-aligned upper and lower dental arches; mixed dentition; good facial symmetry; and no previous orthodontic treatment. Dental arch dimensions of width, length, and depth were taken by one examiner using the Korkhaus’ compass and a digital pachymeter. All the data was collected by the study proforma and SPSS version 26 was used for the purpose of analysis. Results: A total of 50 students were studied. Their mean age was 22.68+3.32 years. According to the arch width, the mean inter canine distance was 35.28+1.98 mm, the mean inter pre molar distance was 42.92+2.36 mm, the mean inter first molar distance was 52.48+4.03 mm, and the mean inte...
2019
Background : It is generally accepted that an important relationship exists between the arch width and vertical facial morphology. The size and form of the dental arches can have considerable implications on orthodontic diagnosis and treatment planning Aim & Objective : The objectives of this study were to evaluate the relationship between dental arch dimensions and the vertical facial pattern determined by the Jarabak ratio, and to examine the differences in dental arch dimensions between male and female untreated adults Material and method : Lateral cephalograms and study models were obtained from 60 untreated subjects (30 males, 30 females) between 18 and 30 years of age with no crossbite, no/minimal crowding and spacing. The Jarabak ratio (posterior facial height/anterior facial height) was measured on cephalograms of each patient. Study models were used to obtain dental measurements, including maxillary and mandibular intercanine, first interpremolar and first intermolar widths...
Evaluation of mandibular morphology in different facial types
Contemporary Clinical Dentistry, 2011
The purpose of this study was to evaluate mandibular morphology in different facial types using various parameters. This study was conducted on lateral cephalograms of a total of 110 subjects, which included 55 males and 55 females between the age of 18-25 years having a mean of 22.3 years for males and 21.5 years for females. The sample was divided into normodivergent, hypodivergent, and hyperdivergent subgroups based on Jarabak's ratio. Symphysis height, depth, ratio (height/depth) and angle, antegonial notch depth, ramal height and width, mandibular depth, upper, lower, and total gonial angle, and mandibular arc angle were analyzed statistically and graphically. It was found that the mandible with the vertical growth pattern was associated with a symphysis with large height, small depth, large ratio, small angle, decreased ramus height and width, smaller mandibular depth, increased gonial angle, and decreased mandibular arc angle in contrast to mandible with a horizontal growth pattern. Sexual dichotomy was found with mean symphysis height and depth in the female sample being smaller than in the male sample, but symphysis ratio was larger in the female sample; males having greater ramus height and width, mandibular depth than females. The mandible seemed to have retained its infantile characteristics with all its processes underdeveloped in hyperdivergent group.
Longitudinal Changes in Dental Arch Circumference in Sulaimani City
European Scientific Journal, 2013
Background: Evaluation of dental arches is of great importance for definitive diagnosis and optimal craniofacial treatment. The circumference or perimeter is the most important dimension of the dental arch and it changes according to age and gender. This issue hasn't been conducted yet in sulaimani city; Aims: aim of the present study was to assess the dimensional changes in the dental arches occurring during the transitional period from mixed to permanent dentition in individuals with normal dentition. Methods: A group of fifty children with normal dentition aged 8-9 years were selected according to specific criteria in sulaimani city in kurdistan of iraq, dental arch dimensions were measured. Five years later, a second examination and measurement was performed to record the changes in dental arches. The data was analyzed by using statistical package for social sciences (SPSS, version 15) program for obtaining the descriptive statistics including the mean, and standard deviation, also the inferential statistics (t-test) was applied to test the significance difference between the dimensions. Results: The study showed an increase in the arch perimeter of the maxilla in the transition from mixed to permanent dentition for both males and females whereas in the lower arch it was the reverse. The arch perimeter differences between maxillary and mandibular arches show high significancy in both mixed and permanent dentitions P(0.00), P(0.00). There was asymmetry in the ach length between right and left side for both mixed and permanent dentition and most of the measurements of the permanent dentition showed high significant differences between right and left sides. There was a significant difference P(0.00) in maxillary and mandibular left and right incisor-canine distance (I-C) between males and females.
Correlation Between Maxillary Anterior Teeth and Common Facial Measurements
Clinical, Cosmetic and Investigational Dentistry, 2023
Background: The symmetry between maxillary anterior teeth and the face holds significant importance. This study assessed and analyzed the relationship between facial parameters and anterior teeth in the maxillary arch of male and female subjects. Specifically, individual width and combined width (CW) measurements of the maxillary anterior teeth were investigated. Methods: This study involved a total of 150 dentate Yemeni subjects (74 men and 76 women), whose ages ranged from 18 years old to 30 years old. A maxillary cast was created, and two digital photographs of the face of each subject were taken and analyzed. Digital calipers and AutoCAD were used to gather measurement data of the dental parameters (intercanthal distance [ICD], interpupillary distance [IPD], interalar width [IAW], intercommissural width [ICW], and bizygomatic width [BZW]) and facial parameters (profile distance). Results: Significant correlations were found for the following: IPD and width of six maxillary anterior teeth of each of the study subjects; ICD and their central incisors; and BZW and their canine width measurements. In contrast, IAW and ICW were not correlated with all tooth measurements. Linear regression findings showed that the CW measurement of the four incisors was significantly correlated with all facial parameter measurements, excluding the ICW and IAW in females and the IAW, ICW, and profile distance in males. Conclusion: The IPD and ICD of males and females may be used to determine their CW measurements. The BZW and IPD of males can be used to take precise anthropological measurements of the width of the central canines and incisors. Meanwhile, the IPD distance of females can be used to assess the central and lateral incisor widths.
Journal of Dentistry Indonesia, 2021
The relationship between facial measurements and the size of the maxillary anterior teeth in the Malaysian population is still a point of contention. Objective: The purpose of this study was to establish a relationship between facial measurements and the mesiodistal width of the maxillary anterior teeth (MDW), which could be used to guide the selection of anterior teeth for complete denture construction. Methods: The facial and dental measurements were obtained directly from 170 Malay adults aged between 19 to 35 who had morphologically normal permanent maxillary anterior teeth from canine to canine. The facial dimensions measured were interpupillary distance (IPD), intercanthal distance (ICD) and interalar distance (IAD). The facial dimensions were measured using a digital vernier calliper while the mesiodistal width of the maxillary anterior teeth was measured with a flexible ruler. The three facial dimensions were correlated with MDW for both genders. Results: The IPD and IAD wer...
Relation of Maxillary Central Incisors Width to Some Facial Measurements
Journal of Oral and Dental Research, 2017
Background Using the extraoral indicators is a common method to determine the size and shape of the artificial teeth. Aim This study was conducted to assess the relationship between the mesiodistal width of maxillary central incisors and some facial anatomical landmarks (Bizygomatic and Inter-canthal distance). Materials and Methods A prospective cross-sectional study was conducted on 160 adult students, with the age range between 18-25. Mesiodistal widths of maxillary central incisors and two facial widths (bizygomatic and inter-canthal) were marked and measured by digital caliper to the nearest of 0.01mm. Data were analyzed statistically using SPSS (V-18) software. Results The statistical Analysis demonstrated the correlation of the mesiodistal width of a right central incisor with bizygomatic and inner-canthal widths was significant at P-Value of (P< 0.05), Spearman›s correlation of bizygomatic for male was 0.358 and female was 0.305, and the spearman›s correlation of intercanthal for male was 0.318 and female was 0.312. In the male, the correlation of the mesiodistal width of a left central incisor with bizygomatic and intercanthal widths was weak; Spearman›s correlation was 0.043 for bizygomatic and was 0.123 for intercanthal. While for female, it showed a strong correlation, spearman›s correlation was 0.349 for bizygomatic and was 0.298 for intercanthal. Conclusion The results proposed that the inter-canthal and bizygomatic widths are both good prognostic factor in determining the mesiodistal width of the maxillary right central incisor. Also concluded that the correlation between maxillary central incisor width and bizygomatic and inter-canthal widths could be differed by gender.
Background and Aim: Esthetics is one of the important treatment goals in prosthetic dentistry. Appropriate selection of anterior teeth with respect to size and shape plays an important role in achieving optimal esthetic outcomes. Using the extraoral indicators is a common method to determine the size of the teeth. In this study, the correlation between the facial widths (in bizygomatic and intercondylar areas) and the mesiodistal width of maxillary central incisors was analyzed. Materials and Methods:A cross-sectional study was conducted on 100 qualified students, 50 females and 50 males. Two facial widths comprising Intercondylar width -distance between two approximately Beyron hinge axis-and bizygomatic width -two most convex points of zygomatic arch-were marked and measured by a facebow and a digital caliper. Mesiodistal maxillary central incisors' widths were measured by a digital caliper. The collected data were analyzed via Pearson correlation coefficient. Results: The mesiodistal width of right central incisor was 8.47±0.56. The mesiodistal width of left central incisor was 8.54±0.64.The bizygomatic width was 126.15±6.74. The intercondylar width was 131.43±5.41. There was no correlation between bizygomatic width and central incisors (P>0.05) and a weak correlation between intercondylar width and central incisors in Iranian community. Conclusion: Facial width is not recommended as a suitable landmark for estimating the mesiodistal width of maxillary central incisors.