Lucarotti, Peter Stephen Kerr (2003)
Ph.D. thesis, University of Birmingham.
This study measured the distribution of the interval between placement and next intervention on the same tooth for direct restorations of teeth in the General Dental Services of the NHS in England and Wales between January 1991 and December 2002. Three different sets of treatment data covering the period were used, involving over 1.3 million restorations. Standard and modified Kaplan-Meier, and three different cross-sectional techniques were used to estimate empirical survival curves, and Cox-regression was used to model the relationship with risk factors associated with the dentist, the patient, geographical location, time, tooth position and type of restoration and cavity. Overall, median survival was slightly more than eight years from placement to re-intervention. The rates of survival without intervention after one year, five years and ten years were, respectively, 89%, 62% and 46%. Key risk factors associated with survival were type of cavity, tooth position, patient age, patient treatment history and patient attendance history. The underlying baseline function of the Cox-regression analysis was closely modelled by both a Weibull and a cubic function.
|Type of Work:||Ph.D. thesis.|
|Supervisor(s):||Burke, Trevor and Holder, Roger|
|School/Faculty:||Colleges (2008 onwards) > College of Medical & Dental Sciences|
|Department:||School of Dentistry|
The appendix consists of a set of HTML documents arranged within sub-folders within the accompanying CD-ROM. These documents have been produced as output from custom-written programs using the statistical analysis package SPSS. The disk also contains the complete text of this thesis, in the form of a Microsoft Word master document with sub-documents.
|Institution:||University of Birmingham|
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