Aim: This study was aimed to assess contaminants on the abutment surface close to the implantabutment interface and the connection, after common technical protocols.Materials and methods: A total of 40 abutments were divided into four groups: control group(abutment removed from the plastic envelop), test group1 (milled), test group2 (milled andpolished), test group3 (milled, polished and steamed). Groups were subjected to scanning electronmicroscope (SEM) analysis. Pollution particles were counted and measured. Mean values andstandard deviation (SD) were calculated. To evaluate any difference between groups WilcoxonSigned Rank Test was conducted. In addition, contaminant chemical characterization wasinvestigated by Energy-dispersive X-ray spectroscopy (EDX).Results: Control group presented minimal amount of pollution (mean value of 2.1 spots [SD: 1.66]covering 0.004% of the surface). On the other hand, SEM analysis revealed on the abutmentsurface a mean value of 115.9 (SD: 32.27), 162 (SD: 21.17), and 32.5 (SD: 9.73) spots, respectively, inTest group 1, 2, and 3. Micro-particles covered the 0.025%, 0.057%, 0.0404% of the surface,respectively, in Test group 1, 2, and 3. On the connection, SEM analysis revealed a mean value of61.9 (SD: 9.07), 39 (SD: 12.35), 42.1 (SD: 8.59) spots, respectively, in Test group 1, 2, and 3. Microparticles covered the 0.0774%, 0.0869%, and 0.0392% of the surface, respectively, in Test group 1,2, and 3. Spots were identified by EDX as micro-particles of lubricant and titanium smear layer. Alldifferences were statistically significant.Conclusions: After technical procedures, presence of contaminants on the abutment surface incontact with the peri-implant tissues was confirmed. To prevent that such debris could interferewith biological stability of peri-implant tissues and, thus, enhance the implant-prosthesisintegration, different cleaning protocols should be evaluated.
Microscopical and chemical surface characterization of the gingival portion and connection of an internal hexagon abutment before and after different technical stages of preparation
Canullo l;
2012-01-01
Abstract
Aim: This study was aimed to assess contaminants on the abutment surface close to the implantabutment interface and the connection, after common technical protocols.Materials and methods: A total of 40 abutments were divided into four groups: control group(abutment removed from the plastic envelop), test group1 (milled), test group2 (milled andpolished), test group3 (milled, polished and steamed). Groups were subjected to scanning electronmicroscope (SEM) analysis. Pollution particles were counted and measured. Mean values andstandard deviation (SD) were calculated. To evaluate any difference between groups WilcoxonSigned Rank Test was conducted. In addition, contaminant chemical characterization wasinvestigated by Energy-dispersive X-ray spectroscopy (EDX).Results: Control group presented minimal amount of pollution (mean value of 2.1 spots [SD: 1.66]covering 0.004% of the surface). On the other hand, SEM analysis revealed on the abutmentsurface a mean value of 115.9 (SD: 32.27), 162 (SD: 21.17), and 32.5 (SD: 9.73) spots, respectively, inTest group 1, 2, and 3. Micro-particles covered the 0.025%, 0.057%, 0.0404% of the surface,respectively, in Test group 1, 2, and 3. On the connection, SEM analysis revealed a mean value of61.9 (SD: 9.07), 39 (SD: 12.35), 42.1 (SD: 8.59) spots, respectively, in Test group 1, 2, and 3. Microparticles covered the 0.0774%, 0.0869%, and 0.0392% of the surface, respectively, in Test group 1,2, and 3. Spots were identified by EDX as micro-particles of lubricant and titanium smear layer. Alldifferences were statistically significant.Conclusions: After technical procedures, presence of contaminants on the abutment surface incontact with the peri-implant tissues was confirmed. To prevent that such debris could interferewith biological stability of peri-implant tissues and, thus, enhance the implant-prosthesisintegration, different cleaning protocols should be evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
