Doeve, A.J. (2021) Onderzoek naar de overlevingskans van posterior partiële indirecte restauraties met opvolging tot 10 jaar. thesis, Dentistry.
Full text available on request.Abstract
Aim: Partial indirect restorations (PIR) are indicated when teeth are weakened because they lost a decent amount of tooth structure and their morphology and function need to be restored. Data on the survival rate of PIR placed by dental students are sparse. The purpose of this retrospective databased study is to determine the survival of lithium disilicate posterior partial indirect restoration placed by dental students. Furthermore, the effect of associated parameters on the survival will be investigated. Material and methods: Patients who received a lithium disilicate PIR between 2009 and 2019 at the Centrum voor Tandheelkunde en Mondzorgkunde in Groningen by dental students were eligible for this study. All of the lithium disilicate PIR (IPS e.max Press) were manufactured by one dental laboratory. The PIR were adhesively luted with a dual cure or light cure resin. One observer evaluated all the restorations by observing the information from the patients’ record (Vistadent, Dentsply Sirona, USA). The PIR were evaluated on the next parameters: year of Masters, dual cure or light cure resin, endodontic status, IDS, onlay/inlay, number of sides PIR and number of cusps restored by the PIR. The observations were noted in an Excel sheet (version 16.41, 2020). Survival probability was calculated using the Kaplan-Meier algorithm. The loss of the PIR was considered as an event. The statistical significance of differences between parameters and the influence on the survival of PIR was determined by using the Log Rank test and Cox-regression (α=.05). Results: A total of 468 restorations by 282 patients were included. According to the Kaplan-Meier analysis, the estimated survival rate was 91,2% after 5 years and 82,0% at 7 years. A total of 36 failures were recorded. Reasons for failure were secondary caries (n=4), endodontic treatment (n=9), fracture (n=9), debonding (n=6) and other reasons (n=8). A statistically significant difference was found for number of sides replaced by the PIR (p<.05). A PIR with 3 sides had a significantly lower survival probability compared to a PIR with 4 sides. No differences between any other parameters were shown. Conclusion: This study showed a good survival probability of lithium disilicate posterior partial indirect restorations placed by dental students after 5 years and an acceptable survival rate after 7 years. The number of sides replaced by the PIR had a significant influence on the survival rate of PIR. Dentists should take this into account when restoring teeth with PIR. Based on earlier data together with this study it could be concluded that PIR made of lithium disilicate are a good treatment option for larger posterior restorations.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Gresnigt, dr. M.M.M. |
| Faculty: | Medical Sciences |
| Date Deposited: | 19 May 2023 11:38 |
| Last Modified: | 19 May 2023 11:38 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3524 |
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