An association between the kind of complications and different types of restorations could not be established .
Nevertheless , a relatively high failure rate due to caries and ceramic fractures was noted
OBJECTIVE The aim of this study was to identify if different types of indirect restorations used for single teeth had different biological and technical complications , as well as survival rates .
Ten-year outcome of crowns placed within the General Dental Services in England and Wales.
AIM It is the aim of this paper to consider the factors associated with the need for re-intervention on a crown , and the times to re-intervention . METHODS A data set was established consisting of patients , 18 years or older , whose birthdays were included within a set of a r and omly selected date s , one of which was chosen in each possible year of birth and whose restoration records contained the placement of one or more indirect restorations on courses of treatment with last date on the cl aim form after 31st December 1990 , and with date of acceptance after September 1990 and before January 2002 . For each tooth treated with a crown , the subsequent history of intervention on that tooth was consulted , and the next date of intervention , if any could be found in the extended data set , was obtained . Thus , a data set was created of crowns which have been placed , with their date s of placement and their date s , if any , of re-intervention . RESULTS Data for over 80,000 different adult patients were analysed , of whom 46 % were male and 54 % female . A total of 47,474 crown restoration occasions were obtained from the data over a period of 11 years . Metal crowns were found to have the longest survival-68 % at 10 years , and all-porcelain crowns the shortest-48 % at 10 years . Factors which were found to influence outcome of crowns included type of crown , age of patient , patient payment exemption status , patient attendance pattern and placement of a root filling in the same course of treatment as a crown . CONCLUSIONS Full-coverage all-metal crowns have longer survival times before re-intervention than metal-ceramic crowns and all-ceramic crowns . Root fillings are associated with reduced survival time of the crowns examined in this study
An association between the kind of complications and different types of restorations could not be established .
Nevertheless , a relatively high failure rate due to caries and ceramic fractures was noted
OBJECTIVE The aim of this study was to identify if different types of indirect restorations used for single teeth had different biological and technical complications , as well as survival rates .