Failures of fiber posts were mainly due to post loss of retention , while metal post failures were mostly related to root fracture , post fracture and crown and /or post loss of retention .
In conclusion , metal and fiber posts present similar clinical behavior at short to medium term follow-up .
Remaining dental structure and ferrule increase the survival of restored pulpless teeth .
The aim of this systematic review was to compare the clinical performance and failure modes of teeth restored with intra-radicular retainers .
Post Placement Affects Survival of Endodontically Treated Premolars
Clinical evidence is lacking regarding the influence of the amount of residual coronal dentin and of post placement on the failure risk of endodontically compromised teeth . The aim of this prospect i ve clinical trial was to assess whether these factors significantly affect the two-year survival of restored pulpless premolars . A sample of 210 individuals provided six experimental groups of 40 premolars in need of endodontic treatment . Groups were defined based on the amount of dentin left at the coronal level . Within each group , in half of the teeth selected at r and om , a fiber post was inserted inside the root canal , whereas in the remaining half of the premolars , no post was placed . All teeth were covered with a crown . The Cox regression analysis revealed that post placement result ed in a significant reduction of failure risk ( p < 0.001 ) . Failure risk was increased for teeth under the “ no ferrule ” ( p = 0.001 ) and “ ferrule effect ” conditions ( p = 0.004 )
Failures of fiber posts were mainly due to post loss of retention , while metal post failures were mostly related to root fracture , post fracture and crown and /or post loss of retention .
In conclusion , metal and fiber posts present similar clinical behavior at short to medium term follow-up .
Remaining dental structure and ferrule increase the survival of restored pulpless teeth .
The aim of this systematic review was to compare the clinical performance and failure modes of teeth restored with intra-radicular retainers .