1. Hospital episode statistics;Department of Health,2013
2. Department of Health. NHS reference costs 2012 to 2013. Available from URL: http://www.gov.uk/government/publications/nhs-reference-costs-2012-to- 2013 (accessed 16 February 2017).
3. Current clinical practice and parameters of care: the management of patients with third molar (syn: wisdom) teeth;Faculty of Dental Surgery of the Royal College of Surgeons of England,1997
4. Management of unerupted and impacted third molar teeth – a national clinical guideline;Scottish Intercollegiate Guidelines Network,2000
5. National Institute for Health and Care Excellence. Oral and dental health. Available from URL: https://www.nice.org.uk/guidance/conditions-and-diseases/oral-and- dental-health (accessed 16 February 2017).