الفهرس | Only 14 pages are availabe for public view |
Abstract Aim: The purpose of this study was to evaluate the marginal discrepancy and clinical evaluation of endocrowns prepared with ferule preparation design compared to that prepared with butt joint preparation design, manufactured by heat pressed lithium disilicate at 0, 3, 6, 9 and 12 months follow up periods. Methodology: A total of 26 patients (10 females and 16 males) were selected for this study with an age range of 21-50. They were divided into two groups (G1&G2) according to the preparation design (N=13). First group received butt joint prepared Endocrowns over posterior teeth (molars). Second group received circumferential ferrule prepared Endocrowns over posterior teeth (molars). Both groups where fabricated using heat pressed lithium disilicate. Before cementation of the restorations a replica where constructed using light and putty additional silicone for the assessment of the marginal discrepancy and internal fit. Cementation was done according to the manufacturer instructions in every single case with the same operator to ensure the standardization of the procedures. Endocrowns of both groups where assessed at the delivery appointment for clinical performance according to the modified USPHS criteria and the follow up continues every 3 months for 1 year. Results: The marginal and internal gaps of both groups were within the clinical acceptable range, but the ferrule group, recorded statistically significant higher internal gap mean than the butt joint group. Regarding the clinical performance all restorations showed 100 % alpha and there was no statistically significant difference between both groups for all tested outcomes. (Marginal adaptation, retention, fracture, marginal discoloration, secondary caries and periodontal health) over a period of one year. Conclusions: Endocrowns restoration designed with butt joint preparation revealed better internal fit than those designed with circumferential ferrule. There were no difference in the clinical marginal adaptation of endocrowns prepared with butt joint and circumferential ferrule preparation designs. The marginal and internal fit of both butt joint and circumferential ferrule preparation designs of endocrowns, shows clinically acceptable range. Both designs (butt joint and circumferential ferrule) showed high successful clinical performance in terms of marginal adaptation, retention, fracture and periodontal health over a period of one year. Keywords: Endocrowns, Lithium disilicate, Marginal adaptation, internal fit, Marginal discrepancy, preparation design, e-max. |