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Updated: Jul 7, 2026
Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
The extensively restored posteriortooth has a high incidence of tooth fracture
Peter M Frost1, David R Radford
1King's College London Dental Institute, Department of Prosthodontics. pfdrymouth@aol.com
Abstract:
A multicentred practice based study was established to test the hypothesis that the extensively restored tooth has a high incidence of posterior tooth fracture (PTF). All patients who presented with PTF in 23 general dental practices over a period of 14 weeks were included in the study. 764 PTF restorations were placed out of a total of 7551, an incidence of 10%. A novel classification proposing increased severity of fracture from I-IV was used. Class I = 19%, II = 54%, III = 22% and IV = 5%. Primary PTFs accounted for 67%, secondary 33%. 92% offractured teeth had a Class 2 restoration in situ. The heavily restored tooth has been shown to have a high incidence of PTF and it is suggested that this is a major restorative problem in general dental practice in the UK.
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