Fracture strength of In-Ceram all-ceramic bridges in relation to cervical shape and try-in procedure. An in-vitro study.
Investigations were performed on the strength of dental porcelain depending on whether it was exposed to saliva before or after the final firing. Forty porcelain specimens were fabricated and subjected to different treatments. A three-point flexural test was performed. In a second study investigations were performed to compare how the cervical shape of the preparation influenced the fracture strength of fixed partial dentures made of glass-infiltrated aluminium oxide. It was concluded that short-term exposure to saliva could have a negative effect on the strength of porcelain and that all-ceramic bridges luted with non-adhesive luting techniques should be supported by abutments with shoulder preparations.
Vult von Steyern
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P
Department of Prosthodontics, Centre for Oral Health Sciences, SE214 21 Malmö, Sweden. per.vult@od.mah.se
al-Ansari
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A
White
K
K
Nilner
K
K
Dérand
T
T
D000537:Aluminum Oxide / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry; D002484:Cementation; D000044:Dental Abutments; D003738:Dental Cements / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure; D003779:Denture Design; D003830:Denture, Partial, Fixed; D005898:Glass / Q000737:chemistry; D006801:Humans; D018583:Pliability; D017680:Potassium Compounds / Q000737:chemistry; D012463:Saliva / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D019231:Tooth Preparation, Prosthodontic
D000538:Aluminum Silicates; D003738:Dental Cements; D017680:Potassium Compounds; C111324:vitadur alpha omega; D003776:Dental Porcelain; C016447:feldspar; C070870:In-Ceram; D000537:Aluminum Oxide