Influence of type of luting cement used with all-ceramic crowns on load capability of post-restored endodontically treated maxillary central incisors.
Adhesive luting of the final restorations is supposed to support the overall strength of post-endodontically restored teeth. For evaluating adhesive vs conventional cementation, the load capability of adhesively restored endodontically treated teeth (ETT) with glass fibre-reinforced composite posts (GFRCP), resin composite cores and all-ceramic crowns was determined. Thirty-two caries-free human upper, central incisors were randomly assigned to four groups, endodontically treated and cut 2 mm above the cemento-enamel junction. All teeth were restored with GFRCP, composite core build-ups and all-ceramic crowns. All-ceramic crowns were cemented with zinc phosphate cement (I), glass ionomer cement (II), and a self-adhesive resin cement (III and IV). After thermo-mechanical loading, the specimens were loaded to fracture. Maximum load capability F(max) and fracture patterns were compared using non-parametric statistics. Median values for the maximum load capability F(max) (minimum/maximum) in [N] were: I = 503 (416/1,038), II = 442 (369/711), III = 502 (326/561) and IV = 518 (416/652). No statistically significant differences were found for F(max) (p = 0.761) and fracture patterns (p = 0.094) between the experimental groups. The type of cementation of all-ceramic crowns, whether self-adhesive or conventional, appears to have no impact on the load capability of ETT restored with GFRCP and composite core build-ups.
Department of Prosthodontics and Geriatric Dentistry, Charité-Universitätsmedizin Berlin, Berlin, Germany.
Anja
A
Preuss
Martin
M
Rosentritt
Roland
R
Frankenberger
Florian
F
Beuer
Michael
M
Naumann
D001696:Biomechanical Phenomena; D001732:Bite Force; D002484:Cementation / Q000379:methods; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure; D005898:Glass / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D007180:Incisor / Q000473:pathology*; D008422:Materials Testing; D008437:Maxilla; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D019553:Tooth, Nonvital / Q000628:therapy*; D015036:Zinc Phosphate Cement / Q000737:chemistry
D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; D005899:Glass Ionomer Cements; D019279:Resin Cements; C009753:fiberglass; D003776:Dental Porcelain; D015036:Zinc Phosphate Cement