References
- Larsson E, Dahlin KG. The prevalence and aetiology of the initial dummy- and finger-sucking habit. Am J Orthod 1985; 87: 432–5.
- Larsson E. Dummy- and finger-sucking habits with special attention to their significance for facial growth and occlusion. 1. Incidence study. Swed Dent J 1971; 64: 667–72.
- Ravn JJ. The prevalence of dummy and finger sucking habits in Copenhagen children until the age of 3 years. Community Dent Oral Epidemiol 1974; 2: 316–22.
- Larsson E. Dummy and finger sucking habits in 4-year-olds. Swed Dent J 1975; 68: 219–24.
- Svedmyr B. Dummy sucking. A study of its prevalence, duration and malocclusion consequences. Swed Dent J 1979; 3: 205–10.
- Gardiner JH. A survey of malocclusion and some aetiological factors in 1000 Sheffield schoolchildren. Dent Pract 1956; 6: 187–98.
- Klackenberg G. Thumbsucking: frequency and etiology. Pediatrics 1949; 4: 418–24.
- Bowden BD. A longitudinal study of the effects of digit-and dummy-sucking. Am J Orthod 1966; 52: 887–910.
- Popovich F. The prevalence of sucking habit and its relationship to oral malformations. Applied Ther 1966; 8: 689–91.
- Baalack IB, Frisk AK. Finger-sucking in children. A study of incidence and occlusal conditions. Acta Odontol Scand 1971; 29: 499–512.
- Moore MB. Digits, dummies and malocclusions. Dental Update 1996; 23: 415–22.
- Williams A. How to…Write and analyse a questionnaire. J Orthod 2003; 30: 245–52.
- Townsend P, Phillimore P, Beattie A. Health and deprivation: inequality and the North. London: Croom Helm, 1988.
- Sturgus P, Smith P, Hughes G. A study of suitable methods of raising response rates in school surveys. University of Surrey, BMRB Limited, available at: http://staff.soc.surrey.ac.uk/psturgis/papers/schools.pdf. Accessed 1 March 2007.
- Cartwright A. Some experiments with factors that might affect the response of mothers to a postal questionnaire. Stat Med 1986; 5: 607–17.
- Wenar C. The reliability of Mothers’ Histories. Child develop 1961; 32: 491–500.
- Traisman AS, Traisman HS. Thumb-and finger-sucking: a study of 2,650 infants and children. J Paediatr 1958; 61: 566–72.
- Larsson E, Järveheden B. Dummy- and finger-sucking habits with special attention to their significance for facial growth and occlusion. 2. Background variables. Swed Dent J 1971; 64: 781–8.
- Fairclough MK, Cook PA. A study of the prevalence of thumb and finger sucking. J Dent Res 1989; 68: 592 (Abstr 268).
- Larsson E. The prevalence and the aetiology of the prolonged dummy and finger-sucking habits. Eur J Orthod 1985; 7: 172–6.
- Graber TM. Thumb- and finger-sucking. Am J Orthod 1959; 45: 258–64.
- Proffit WR. Contemporary Orthodontics, 3rd Edn. St Louis, MO: C.V. Mosby, 2000.
- Burford D, Noar JH. The causes, diagnosis and treatment of anterior open bite. Dental Update 2003; 30: 235–41.