Comparing endocrown restorations on permanent molars and premolars: a systematic review and meta-analysis
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Objectives The objective of this systematic review was to evaluate the success of endocrown restorations on molars in comparison with endocrown restorations on premolars.Registration number The methodology for this review is registered with the PROSPERO database (CRD42019149543).Data sources Medline, Embase, Dentistry & Oral Sciences Source and Cochrane CENTRAL were searched through January 2020, supplemented with hand searching of additional relevant journals.Data selection and data extraction Two independent reviewers screened studies against predefined inclusion criteria and extracted data.Data analysis Narrative analysis was carried out and random-effects meta-analysis was performed where possible.Results Out of the selected eight studies, reported success rate of endocrown restoration in molars varied from 72.73% to 99.57% and in premolars ranged from 68.75% to 100%, with a follow-up range of 3-19 years. The pooled odds ratio and 95% confidence intervals for failure rates in molars compared to premolars in four studies selected for meta-analysis were 1.096 (95% CI: 0.280, 4.292).Conclusions These findings showed similar success rates and no difference in the rate of endocrown failures between molars and premolars, thus suggesting that premolars may be considered suitable candidates for endocrowns. However, the findings should be interpreted with caution due to methodological limitations of the included studies. Further better quality and specifically designed controlled trials directly comparing the clinical performance of endocrowns on molars and premolars are required.
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