Abstract
Objective: To aggregate the risk of traumatic dental injury caused by overjet.
Data sources: Medline (1966–1996) Excerpta Medica (1985–1996) using keywords malocclusion, overjet, trauma, fractured teeth, injuries, epidemiology as well as references of identified articles.
Study selection: The authors included studies concerned with the relationship between overjet size (in millimetres) and traumatic injuries to teeth; those considering only prevalence were excluded. Quality assessment of included studies was carried out.
Data extraction and synthesis A 2×2 table was constructed relating overjet size and trauma for each study and odds ratio calculated. Cut-off points for overjets were 3 mm and less, more than 3 mm and 6 mm or more on the basis of data presented in studies.
Results: Eleven studies were included. Pooled odds ratios for all studies of overjet of 3 mm and less versus 3 mm or more showed significant heterogeneity, and therefore a sensitivity analysis was performed (see table).
Conclusions: Children with an overjet greater than 3 mm are at approximately twice as high risk of dental trauma as those with an overjet of less than 3 mm.
Nguyen QV, Bezemer PD, Habets L, Prahl-Anderson B. A systematic review of the relationship between overjet size and traumatic dental injuries. Eur J Orthodont 1999; 21:503–515
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Address for reprints: Dr QV Nguyen, Department of Orthodontics, Academic Centre for Dentistry Amsterdam (ACTA) Louwesweg 1, 1066 EA Amsterdam, The Netherlands.
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Fox, N. Children with overjets of over 3mm are at higher risk of dental trauma. Evid Based Dent 2, 102 (2000). https://doi.org/10.1038/sj.ebd.6400070
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DOI: https://doi.org/10.1038/sj.ebd.6400070