IADR Abstract Archives
Chemical-physical properties of innovative polysiloxane-guttapercha calcium silicate-containing endodontic sealer
Objectives: Root canal filling systems based on polydimethylpolymethylhydrogensiloxane (RoekoSeal) or polydimethylpolymethylhydrogensiloxane guttapercha (GuttaFlow) showed advantages in handiness and clinical application.
Experimental calcium silicate sealers - able to nucleate apatite filling the interface spaces/porosities at the root dentine walls - have been innovatively proposed by Gandolfi et al. in 2010 and now formulations are present on the market (MTA Fillapex).
The aim of the study was to evaluate the chemical-physical properties of a novel polysiloxane-guttapercha glass-containing (GuttaFlow bioseal) root canal sealer.
Methods: GuttaFlow bioseal was tested in comparison with GuttaFlow 2, and with two guttapercha-free materials (RoekoSeal and MTA Fillapex). Calcium release, alkalinizing activity, setting time, water sorption, (open, impervious, apparent) porosity, weight loss, and the ability to nucleate calcium phosphate in simulated a body fluid were evaluated.
Results: The materials showed evident differences in calcium release and alkalinizing activity, as highest calcium release for MTA Fillapex and no alkalinizing activity for RoekoSeal (tables). Huge differences were obtained in initial (range from 25 to 130 min) and final (range from 45 to 270 min) setting times; namely MTA Fillapex showed the highest values and GuttaFlow bioseal the shortest (table). Wide differences in porosity, water sorption and solubility were obtained. ESEM-EDX of fresh materials showed the constitutive elements of the materials whilst different amount of calcium phosphate deposits were detected on the surface; higher deposits were displayed by GuttaFlow bioseal.
Conclusions:
CaSi glass particles may co-operate with polysiloxane (Si–O–Si) groups and improve the biointeractive properties of the filling system. The incorporation of CaSi glass into polydimethylpolymethylhydrogensiloxane guttapercha sealers may represent a new frontier for endodontic therapy to obtain bioactive biointeractive flowable guttapercha, likely helpful to favour the regeneration of the damaged apical tissues such as periodontal ligament, cementum and periapical bone when applied in the root canal and/or extruded.
Experimental calcium silicate sealers - able to nucleate apatite filling the interface spaces/porosities at the root dentine walls - have been innovatively proposed by Gandolfi et al. in 2010 and now formulations are present on the market (MTA Fillapex).
The aim of the study was to evaluate the chemical-physical properties of a novel polysiloxane-guttapercha glass-containing (GuttaFlow bioseal) root canal sealer.
Methods: GuttaFlow bioseal was tested in comparison with GuttaFlow 2, and with two guttapercha-free materials (RoekoSeal and MTA Fillapex). Calcium release, alkalinizing activity, setting time, water sorption, (open, impervious, apparent) porosity, weight loss, and the ability to nucleate calcium phosphate in simulated a body fluid were evaluated.
Results: The materials showed evident differences in calcium release and alkalinizing activity, as highest calcium release for MTA Fillapex and no alkalinizing activity for RoekoSeal (tables). Huge differences were obtained in initial (range from 25 to 130 min) and final (range from 45 to 270 min) setting times; namely MTA Fillapex showed the highest values and GuttaFlow bioseal the shortest (table). Wide differences in porosity, water sorption and solubility were obtained. ESEM-EDX of fresh materials showed the constitutive elements of the materials whilst different amount of calcium phosphate deposits were detected on the surface; higher deposits were displayed by GuttaFlow bioseal.
Conclusions:
CaSi glass particles may co-operate with polysiloxane (Si–O–Si) groups and improve the biointeractive properties of the filling system. The incorporation of CaSi glass into polydimethylpolymethylhydrogensiloxane guttapercha sealers may represent a new frontier for endodontic therapy to obtain bioactive biointeractive flowable guttapercha, likely helpful to favour the regeneration of the damaged apical tissues such as periodontal ligament, cementum and periapical bone when applied in the root canal and/or extruded.
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