D J F van Marrewijk1, M A E van Stiphout2, W Reuland-Bosma2, E M Bronkhorst3, E M Ongkosuwito4. 1. Centre for Special Care Dentistry CBT Rijnmond, Rotterdam, Centre for Special Care Dentistry CBT Amarant, Tilburg, debbyvanmarrewijk@gmail.com. 2. Centre for Special Care Dentistry CBT Rijnmond, Rotterdam. 3. Faculty of Dentistry, UMC St Radboud, Nijmegen, and. 4. Department of Orthodontics, Erasmus MC-Sophia, University Medical Center, Rotterdam, The Netherlands.
Abstract
BACKGROUND/ OBJECTIVE: Hypodontia is often seen in people with Down syndrome (DS). In the normal population, persons with hypodontia have a shorter cranial base and a hypoplastic maxilla, leading to a skeletal Class III tendency and a reduced face height. The purpose of this study was to examine craniofacial morphology in patients with DS at different ages and the influence of hypodontia on their craniofacial morphology. MATERIALS AND METHODS: A comparative cross-sectional study was conducted in 63 children with DS (6-19 years old; 28 males and 35 females) at a Centre for Special Care Dentistry in Rotterdam, the Netherlands (CBT Rijnmond). Digital lateral cephalograms were obtained from all subjects and a cephalometric analysis was performed. The subjects were divided into a group with hypodontia (13 males and 25 females) and a group without hypodontia (15 males and 10 females). RESULTS: Significant results included a decrease in antero-posterior relationship of upper and lower jaw (ANB angle -0.331° per year, P = 0.044) and a decrease in vertical dimension (S-N_Go-Gn angle -0.72° per year, P = 0.039) over the years in subjects with hypodontia compared to subjects without hypodontia. CONCLUSION: The process of growth in DS patients is towards a reversed overjet. Hypodontia seems to have an additional effect on this development. The management of hypodontia as part of the complete treatment of dental development in DS children is important because it strongly influences the jaw relationship.
BACKGROUND/ OBJECTIVE:Hypodontia is often seen in people with Down syndrome (DS). In the normal population, persons with hypodontia have a shorter cranial base and a hypoplastic maxilla, leading to a skeletal Class III tendency and a reduced face height. The purpose of this study was to examine craniofacial morphology in patients with DS at different ages and the influence of hypodontia on their craniofacial morphology. MATERIALS AND METHODS: A comparative cross-sectional study was conducted in 63 children with DS (6-19 years old; 28 males and 35 females) at a Centre for Special Care Dentistry in Rotterdam, the Netherlands (CBT Rijnmond). Digital lateral cephalograms were obtained from all subjects and a cephalometric analysis was performed. The subjects were divided into a group with hypodontia (13 males and 25 females) and a group without hypodontia (15 males and 10 females). RESULTS: Significant results included a decrease in antero-posterior relationship of upper and lower jaw (ANB angle -0.331° per year, P = 0.044) and a decrease in vertical dimension (S-N_Go-Gn angle -0.72° per year, P = 0.039) over the years in subjects with hypodontia compared to subjects without hypodontia. CONCLUSION: The process of growth in DS patients is towards a reversed overjet. Hypodontia seems to have an additional effect on this development. The management of hypodontia as part of the complete treatment of dental development in DS children is important because it strongly influences the jaw relationship.
Authors: Michel E Weijerman; A Marceline van Furth; Antonie Vonk Noordegraaf; Jacobus P van Wouwe; Chantal J M Broers; Reinoud J B J Gemke Journal: J Pediatr Date: 2007-11-19 Impact factor: 4.406
Authors: Mari Eli Leonelli de Moraes; Luiz Cesar de Moraes; Gustavo Nogara Dotto; Patrícia Pasquali Dotto; Luis Roque de Araújo dos Santos Journal: Braz Dent J Date: 2007