title: New glass polyalkenoate temporary cement for cement-retained implant restoration: evaluation of elevation and retentive strength.
abstract: The purpose of this study was to evaluate four luting agents for cement-retained implant restorations in two aspects: post-cementation elevation of the superstructure and the retentive strength before and after thermocycling and mechanical cycling. The four evaluated luting agents were: new glass polyalkenoate hard-type (GH) and soft-type (GS) cements, polycarboxylate hard-type (HH) and soft-type (HS) cements. Elevation and retentive strength were measured using a CCD laser displacement sensor and a universal testing machine respectively. Elevation increased in this order: GH, GS, HH, and HS. Thermal and mechanical stresses significantly decreased retentive strength, and the mean values exhibited by GH were significantly higher than the other luting agents. The novel glass polyalkenoate cements (hard- and soft-type) experimentally prepared in the present study augured well as luting agents by virtue of their reduced film thickness and their excellent post-cementation retention and elevation.
authors.affiliation: Department of Oral & Maxillofacial Prosthodontics and Oral Implantology, The University of Tokushima, Institute of Health Biosciences, 3-18-15 Kuramoto, Tokushima 770-8504, Japan.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Naito
authors.forename: Jian-Rong
authors.initials: JR
authors.lastname: Chen
authors.forename: Takaharu
authors.initials: T
authors.lastname: Goto
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ishida
authors.forename: Takanori
authors.initials: T
authors.lastname: Kawano
authors.forename: Yoritoki
authors.initials: Y
authors.lastname: Tomotake
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Ichikawa
mesh_terms: D000535:Aluminum / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D002484:Cementation / Q000379:methods*; D000044:Dental Abutments; D001840:Dental Bonding / Q000379:methods; D015921:Dental Implants; D017268:Dental Prosthesis Retention; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis / Q000295:instrumentation; D003830:Denture, Partial, Fixed; D005461:Fluorine / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D010165:Palladium / Q000737:chemistry; D011076:Polycarboxylate Cement / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature
chemical_list: D000538:Aluminum Silicates; D015921:Dental Implants; D005899:Glass Ionomer Cements; D006047:Gold Alloys; D011076:Polycarboxylate Cement; C053629:fluoroaluminum; D005461:Fluorine; D012834:Silver; D010165:Palladium; D000535:Aluminum