title: In vitro evaluation of a modified 4-META/MMA-TBB resin for filling access holes of screw-retained implant prostheses.
abstract: This study evaluates a modified 4-META/MMA-TBB resin (M4M) as a candidate material for filling screw-retained implant access hole. Its characteristics were compared with a conventional composite resin (CR) with or without a bonding agent (BA) or a ceramic primer (CP). Ceramic blocks were divided into five groups, including (A) CR, (B) CR with BA, (C) CR with CP and BA, (D) M4M, and (E) M4M with CP. Shear bond strengths were measured after 5000 times of thermocycling. Groups A, B, and D were excluded from further tests as they showed no adhesion. A cylindrical cavity (2.5 mm diameter, 3 mm depth) simulating access hole was prepared in a ceramic block and glazed to evaluate micro-leakage and wear test of groups C and E. The results were statistically analyzed with Mann-Whitney test (p  <  0.05). Shear bond strength of groups C (7.6 ± 2.2 MPa) and E (8.6 ± 1.0 MPa) was not significantly different. In micro-leakage analysis, average wear depth and wear volume, group E (7.5 ± 3.3%, 59.3 ± 12.9 μm, 0.16 ± 0.04 mm(3) ) showed significantly lower values than those of group C (45.6 ± 24.4%, 76.0 ± 16.4 μm, 0.28 ± 0.03 mm(3) ). It is suggested that the combination of CP and M4M can be one of feasible systems to fill the ceramic access holes of the implant upper structure.
authors.affiliation: 8, Place du Général Catroux, 75017, Paris, France.
authors.forename: Remy
authors.initials: R
authors.lastname: Tanimura
authors.affiliation: Department of Clinical Community and Sciences, University of Alabama at Birmingham School of Dentistry, 1919 7th Avenue South, Birmingham, Alabama, 35294-0007.
authors.forename: Shiro
authors.initials: S
authors.lastname: Suzuki
mesh_terms: D001863:Bone Screws; D001896:Boron Compounds / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D008768:Methylmethacrylates / Q000737:chemistry*; D019736:Prostheses and Implants
chemical_list: D001896:Boron Compounds; D003188:Composite Resins; D008689:Methacrylates; D008768:Methylmethacrylates; C476987:methylmethacrylate-tributylborane resin; C034139:4-methacryloxyethyltrimellitic acid anhydride
keywords: 4-META/MMA-TBB resin; access hole; filling; in vitro; screw-retained