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VOLUME 19 , ISSUE 10 ( 2018 ) > List of Articles


Dental Arch Dimensions and Form in a Sudanese Sample

Hashim K Saeed, Adil O Mageet

Keywords : Arch form, Arch length, Arch width

Citation Information : Saeed HK, Mageet AO. Dental Arch Dimensions and Form in a Sudanese Sample. J Contemp Dent Pract 2018; 19 (10):1235-1241.

DOI: 10.5005/jp-journals-10024-2410

License: CC BY-NC 3.0

Published Online: 00-10-2018

Copyright Statement:  Copyright © 2018; Jaypee Brothers Medical Publishers (P) Ltd.


The aim of this study is to determine the dental arch dimensions (width and length) and form in a group of a Sudanese sample population. Background: The size and shape of dental arches have significant implication in orthodontic diagnosis and treatment planning as it affects the space available, dental esthetics and stability of the occlusion. Materials and methods: This study is a biometric analysis of dental casts of 50 adult Sudanese dental students (20 males, 30 females) aged between 19 to 22 years with normal occlusion. The study was conducted at the orthodontic clinics, Faculty of Dentistry, University of Khartoum. Each student was interviewed and written consent was given. The inclusion criteria were: complete permanent dentition fully erupted to the occlusal plane, no proximal caries or restorations, no attrition or dental anomalies, no extractions, no previous or ongoing orthodontic treatment and no fractures or jaw surgeries. Paired-test, ANOVA test, and Pearson\'s correlation were used for statistical analysis with a p-value set at 0.05. Results: The result showed normal occlusion is higher in males than in females. Upper arch dimensions (width and length) found to be higher in males than females, inter canine width (ICW), males 36, and females 34.45; interpremolar width (IPmW) males 48.08, females 47.58; inter-molar width (IMW) males 53.04, females 52.4; the length for males 37.98 and for females was 37.09. Comparison of Lower arch dimensions between males and females showed ICW (27.08 and 26.86); IPmW (40.97 and 39.67); IMW (45.61 and 45.69); depth was (33.91 and 33.91) consequently. The ovoid-shaped arch form was more common in both genders. Conclusion: Length dimension showed the highest value with square arch form. The width dimensions increase with little change in the inter-canine region but appreciably more in the distal part of the arch. Men have a more massive arch form than females. The ovoid arch form dominates in the Sudanese population. Clinical significance: Knowledge of arch dimensions that are associated with normal occlusion is helpful in determining treatment goals and proper diagnosis and treatment plan by choosing the right arch form for each race.

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  1. Trivino T, Siqueira DF, Scanavini MA. A new concept of mandibular dental arch forms with normal occlusion. Am J Orthod Dentofacial Orthop 2008;133:15-22.
  2. Carter GA, McNamara JA. Longitudinal dental arch changes in adults. Am J Orthod Dentofacial Orthop 1998; 114:88-99.
  3. Defraia E, Baroni G, Marinelli A. Dental arch dimensions in the mixed dentition: a study of Italian children born in the 1950s and the 1990s. Angle Orthod 2006;76:446-451.
  4. Barrow GV, White JR. Developmental changes of the maxillary and mandibular dental arches. The Angle Orthod 1952;22:41-46.
  5. Bishara SE, Ortho D, Jakobsen JR, Treder J, Nowak A. Arch width changes from 6 weeks to 45 years of age. Am J Orthod Dentofacial Orthop 1997;111:401-409.
  6. Lundström A. Changes in crowding and spacing of the teeth with age. The Dental practitioner and Dental Record 1969;19:218-224.
  7. Moorrees CF. The dentition of the growing child: a longitudinal study of dental development between 3 and 18 years of age. Cambridge (USA): Harvard University Press; 1959. Saudi Med J 2018; 39(1):91.
  8. Sillman JH. Dimensional changes of the dental arches: longitudinal study from birth to 25 years. Am J Orthod 1964;50:824-842.
  9. Engel GA. Preformed arch wires: reliability of fit. Am J Orthod 1979;76:497-504.
  10. Knox J, Jones M, and Durning P. An ideal preformed archwire? Br J Orthod 1993;20:65-70.
  11. Natalia Alvaran SIR, and Peter H. Buschang. maxillary and mandibular arch widths of Colombians. Am J Orthod Dentofacial Orthop 2009;135:649-56.
  12. Yun YK, Kim SH, Mo SS, Cha KS, Kim JG, Tae KC. Mandibular clinical arch forms in Koreans with normal occlusions. Korean J Orthod 2004; 34: 481-87.
  13. Al-Tamimi T. S. An odontometric study of tooth size and arch dimensions in a Saudi sample with normal occlusion (MSc Thesis), Faculty of Dentistry, King Saud University, 2000.
  14. Omar H, Alhajrasi M, Felemban N, Hassan A. Dental arch dimensions, form and tooth size ratio among a Saudi Sample. Saudi Med J. 2018;39(1):86-91.
  15. Angle EH. Growth during adult life. Proc Am Phil Soc 1936;76:847-97.
  16. Knott VB. Longitudinal study of dental arch width at four stages of dentition. Angle orthod 1972;42:387-395.
  17. Benjamin G, Burris A, Edward F, Harris EF. Maxillary Arch Size Shape in American Blacks and Whites, Angle Orthod 2000;70:297-302.
  18. Harris EF. A longitudinal study of arch size and form in untreated adults. Am J Orthod Dentofacial Orthop 1997;111:419-427.
  19. Hashim HA, Al-Ghamdi SAF. Tooth Width and Arch Dimensions in Normal and Malocclusion Samples: An Odontometric Study. J Contemp Dent Pract 2005;6: 36-51.
  20. Williams PN. Determining the shape of the normal arch. Dental Cosmos 1917;59:695-708.
  21. Robert TL. Arch width and form. Am J Orthod Dentofacial Orthop 1999;1:305-313.
  22. Foster TD. A cross-sectional study into age changes of the human dental arch. Archives of Oral Biology 1969;14:71-86.
  23. Henrikson JPM, Thilander B. Long-term stability of dental arch form in normal occlusion from 13 to 31 years of age. Eur J Orthod 2001;23:51-61.
  24. Ferario VF. Human dental arch shape evaluated by Euclidan distance matrix analysis. Am J of Physical Anathropology 1993; 90:445-453.
  25. Mutinelli S, Cozzani M, Manfredi M, Siciliani G. Dental arch analysis system. Orthod 2004;5(2):200-211.
  26. Fleming PS, Dibiase AT, Lee RT. Arch form and dimensional changes in orthodontics. Orthod 2008a;9:58- 64.
  27. Sampson PD. Dental arch shape: Astatistical analysis using conic sections. AJO 1981;79:535-548.
  28. Rudge SJ. Dental arch analysis: arch form, a review of the literature. Eur J Orthod 1981; 3: 279-384.
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