Root Dimensions in Patients with Mild Hypodontia and a Control GroupFunding None.
31 December 2019 (online)
Objectives The aim of this study was to compare root dimensions (length and mesiodistal widths) between subjects with mild hypodontia and an age- and sex-matched control group.
Materials and Methods Root dimension measurements of all permanent teeth excluding third molars were made on standardly taken orthopantomograms of 50 individuals (25 hypodontia and 25 controls) attending the University of Sharjah Dental Hospital. The length and two mesiodistal widths were measured for each fully formed root. The length of the root was measured digitally by drawing a line from the midpoint and bisecting the mesiodistal cemento-enamel junction (CEJ) of the tooth and extended to its apex. The mesiodistal widths of each root were measured at the cervical region and at half way of and perpendicular to the length of the root.
Statistical Analysis Two sample t-tests were used to compare root dimension measurements between the hypodontia and control groups.
Results There were no significant differences between genders with regard to root length or widths measurements, and therefore genders were combined for further analysis. Patients with hypodontia have significantly shorter root lengths than controls for the upper central incisors, upper canines, first premolars, and lower first molars (p < 0.05). Similarly, root width at the midpoint of the root was found to be less in hypodontia group than that in controls for the upper central incisors, lower first premolars, upper first molars, and all second premolars (p < 0.05). Similar pattern of differences was found with regard to the root width at the cervical region (p < 0.05).
Conclusions Patients with hypodontia have shorter and narrower roots of the whole permanent dentition except the upper lateral incisors, lower incisors, lower canines, and all second molars when compared with controls. In effect, this may affect the orthodontic treatment planning and implant placement.
- 1 Uzuner D, Celik MM, Toy E, Turkdonmez CO. Assessment of hypodontia in the Turkish patients referring to the orthodontic clinic: A retrospective study. Eur J Dent 2013; 7 Suppl 1 S9-S14
- 2 Cobourne MT, Sharpe PT. Diseases of the tooth: the genetic and molecular basis of inherited anomalies affecting the dentition. Wiley Interdiscip Rev Dev Biol 2013; 2 (02) 183-212
- 3 Khalaf K, Miskelly J, Voge E, Macfarlane TV. Prevalence of hypodontia and associated factors: a systematic review and meta-analysis. J Orthod 2014; 41 (04) 299-316
- 4 Rakhshan V. Congenitally missing teeth (hypodontia): A review of the literature concerning the etiology, prevalence, risk factors, patterns and treatment. Dent Res J (Isfahan) 2015; 12 (01) 1-13
- 5 Mattheeuws N, Dermaut L, Martens G. Has hypodontia increased in Caucasians during the 20th century? A meta-analysis. Eur J Orthod 2004; 26 (01) 99-103
- 6 Brook AH. Multilevel complex interactions between genetic, epigenetic and environmental factors in the aetiology of anomalies of dental development. Arch Oral Biol 2009; 54 (Suppl 1): S3-S17
- 7 Galluccio G, Castellano M, La Monaca C. Genetic basis of non-syndromic anomalies of human tooth number. Arch Oral Biol 2012; 57 (07) 918-930
- 8 Khalaf K. Tooth size in patients with mild, moderate and severe hypodontia and a control group. Open Dent J 2016; 10: 382-389
- 9 Hsieh YL, Razzoog M, Garcia Hammaker S. Oral care program for successful long-term full mouth habilitation of patients with hypohidrotic ectodermal dysplasia. Case Rep Dent 2018; 2018: 4736495
- 10 Bailleul-Forestier I, Molla M, Verloes A. Berdal A. The genetic basis of inherited anomalies of the teeth. Part 1: clinical and molecular aspects of non-syndromic dental disorders. Eur J Med Genet 2008; 51 (04) 273-291
- 11 Laing E, Cunningham SJ, Jones S, Moles D, Gill D. Psychosocial impact of hypodontia in children. Am J Orthod Dentofacial Orthop 2010; 137 (01) 35-41
- 12 Locker D, Jokovic A, Prakash P, Tompson B. Oral health-related quality of life of children with oligodontia. Int J Paediatr Dent 2010; 20 (01) 8-14
- 13 Kotecha S, Turner PJ, Dietrich T, Dhopatkar A. The impact of tooth agenesis on oral health-related quality of life in children. J Orthod 2013; 40 (02) 122-129
- 14 Karadas M, Celikoglu M, Akdag MS. Evaluation of tooth number anomalies in a subpopulation of the North-East of Turkey. Eur J Dent 2014; 8 (03) 337-341
- 15 Wong AT, McMillan AS, McGrath C. Oral health-related quality of life and severe hypodontia. J Oral Rehabil 2006; 33 (12) 869-873
- 16 Gill DS, Barker CS. The multidisciplinary management of hypodontia: a team approach. Br Dent J 2015; 218 (03) 143-149
- 17 Cakan DG, Ulkur F, Taner T. The genetic basis of dental anomalies and its relation to orthodontics. Eur J Dent 2013; 7 (01) Suppl 1 S143-S147
- 18 Dahlberg AA. The changing dentition of man. J Am Dent Assoc 1945; 32: 676-690
- 19 Townsend GC, Brook AH. Genetic, epigenetic and environmental influences on dental development. Ortho Tribune 2008; 3: 3-6
- 20 Townsend G, Harris EF, Lesot H, Clauss F, Brook A. Morphogenetic fields within the human dentition: a new, clinically relevant synthesis of an old concept. Arch Oral Biol 2009; 54 Suppl 1 S34-S44
- 21 Nunn JH, Carter NE, Gillgrass TJ. et al. The interdisciplinary management of hypodontia: background and role of paediatric dentistry. Br Dent J 2003; 194 (05) 245-251
- 22 Carter NE, Gillgrass TJ, Hobson RS. et al. The interdisciplinary management of hypodontia: orthodontics. Br Dent J 2003; 194 (07) 361-366
- 23 Jepson NJ, Nohl FS, Carter NE. et al. The interdisciplinary management of hypodontia: restorative dentistry. Br Dent J 2003; 194 (06) 299-304
- 24 Meechan JG, Carter NE, Gillgrass TJ. et al. Interdisciplinary management of hypodontia: oral surgery. Br Dent J 2003; 194 (08) 423-427
- 25 Hobson RS, Carter NE, Gillgrass TJ. et al. The interdisciplinary management of hypodontia: the relationship between an interdisciplinary team and the general dental practitioner. Br Dent J 2003; 194 (09) 479-482
- 26 Picanço GV, de Freitas KM, Cançado RH, Valarelli FP, Picanço PR, Feijão CP. Predisposing factors to severe external root resorption associated to orthodontic treatment. Dental Press J Orthod 2013; 18 (01) 110-120
- 27 Elhaddaoui R, Benyahia H, Azeroual MF, Zaoui F, Razine R, Bahije L. Resorption of maxillary incisors after orthodontic treatment–clinical study of risk factors. Int Orthod 2016; 14 (01) 48-64
- 28 Nigul K, Jagomagi T. Factors related to apical root resorption of maxillary incisors in orthodontic patients. Stomatologija 2006; 8 (03) 76-79
- 29 Lopatiene K, Dumbravaite A. Risk factors of root resorption after orthodontic treatment. Stomatologija 2008; 10 (03) 89-95
- 30 King P, Maiorana C, Luthardt RG. et al. Clinical and radiographic evaluation of a small-diameter dental implant used for the restoration of patients with permanent tooth agenesis (hypodontia) in the maxillary lateral incisor and mandibular incisor regions: a 36-month follow-up. Int J Prosthodont 2016; 29 (02) 147-153
- 31 Bahrami M, Saleh Saber F, Hendi A. Comprehensive treatments for congenitally missing teeth and generalized diastema. Case Rep Dent 2017; 2017: 3254873
- 32 Forgie AH, Thind BS, Larmour CJ, Mossey PA, Stirrups DR. Management of hypodontia: restorative considerations. Part III. Quintessence Int 2005; 36 (06) 437-445
- 33 Sanderink GC, Visser WN, Kramers EW. The origin of a case of severe image distortion in rotational panoramic radiography. Dentomaxillofac Radiol 1991; 20 (03) 169-171
- 34 Choi YG, Kim YK, Eckert SE, Shim CH. Cross-sectional study of the factors that influence radiographic magnification of implant diameter and length. Int J Oral Maxillofac Implants 2004; 19 (04) 594-596
- 35 Samawi SS, Burke PH. Angular distortion in the orthopantomogram. Br J Orthod 1984; 11 (02) 100-107