Abstract
Aim: It is the aim of this paper to present data on the survival of restorations in molar teeth by analysis of the time to re-intervention on the restorations and time to extraction of the restored teeth, and to discuss the factors which may influence this.
Methods: A data set was established, consisting of General Dental Services' patients, this being obtained from all records for adults (aged 18 or over at date of acceptance) in the GDS of England and Wales between 1990 and 2006. The data consist of items obtained from the payment claims submitted by GDS dentists to the Dental Practice Board (DPB) in Eastbourne, Sussex, UK. This study examined the recorded intervals between placing a restoration in a molar tooth and re-intervention on the tooth, and the time to extraction of the restored tooth.
Results: Data for more than three million different patients and more than 25 million courses of treatment were included in the analysis. Included were all records for adults (aged 18 or over at date of acceptance). More than six million restorations involving molar teeth were included in the analysis.
Conclusions: Overall, 41% of restorations in molar teeth have survived without re-intervention at 15 years. Overall survival of restored molar teeth without extraction is 83% over fifteen years. Factors influencing survival are patient age, dentist age, and patient treatment need. With regard to tooth position, there is minimal difference in molar tooth survival to extraction with respect to upper vs lower arch, but survival time to extraction of upper third molar teeth is the least good. On molar teeth, when survival of the restored tooth to extraction is examined, crowns do not represent the optimally performing restoration in under-40 year age groups, leading to earlier loss of the tooth; in older age groups (over 40 years) a crown presents the best survival, to extraction, of the restored tooth. In general, only mesial-occlusal-distal (MOD) amalgams and glass ionomers perform less well than crowns in terms of time to extraction.
Methods: A data set was established, consisting of General Dental Services' patients, this being obtained from all records for adults (aged 18 or over at date of acceptance) in the GDS of England and Wales between 1990 and 2006. The data consist of items obtained from the payment claims submitted by GDS dentists to the Dental Practice Board (DPB) in Eastbourne, Sussex, UK. This study examined the recorded intervals between placing a restoration in a molar tooth and re-intervention on the tooth, and the time to extraction of the restored tooth.
Results: Data for more than three million different patients and more than 25 million courses of treatment were included in the analysis. Included were all records for adults (aged 18 or over at date of acceptance). More than six million restorations involving molar teeth were included in the analysis.
Conclusions: Overall, 41% of restorations in molar teeth have survived without re-intervention at 15 years. Overall survival of restored molar teeth without extraction is 83% over fifteen years. Factors influencing survival are patient age, dentist age, and patient treatment need. With regard to tooth position, there is minimal difference in molar tooth survival to extraction with respect to upper vs lower arch, but survival time to extraction of upper third molar teeth is the least good. On molar teeth, when survival of the restored tooth to extraction is examined, crowns do not represent the optimally performing restoration in under-40 year age groups, leading to earlier loss of the tooth; in older age groups (over 40 years) a crown presents the best survival, to extraction, of the restored tooth. In general, only mesial-occlusal-distal (MOD) amalgams and glass ionomers perform less well than crowns in terms of time to extraction.
| Original language | English |
|---|---|
| Pages (from-to) | 525–536 |
| Number of pages | 12 |
| Journal | British Dental Journal |
| Volume | 225 |
| Issue number | 6 |
| Early online date | 14 Sept 2018 |
| DOIs | |
| Publication status | Published - 28 Sept 2018 |