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Fardal Ø, Johannessen AC, Linden GJ: Tooth loss during maintenance following periodontal treatment in a periodontal practice in Norway.J Clin Periodontol 2004, 31: 550-555.
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Lawton B, Rose S, Kieser J, Broadbent J, Sussex P, Thomson M, Dowell A: Disparities in edentulism and tooth loss between Maori and non-Maori New Zealand women.Aust N Z J Public Health 2008, 32: 254-260.
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Former smokers were combined with current smokers.
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Tooth loss was compared with reasons for extraction by smoking status.
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Tooth loss was combined with periodontal attachment loss.
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Tooth loss was defined by three levels.
Susin C, Oppermann RV, Haugejorden O, Albandar JM: Tooth loss and associated risk indicators in an adult urban population from south Brazil. Acta Odontol Scand 2005, 63: 85-93.
Prosthetic treatment was used for outcome measure.
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