Cic edizioni internazionali
Oral Implantology

CEMENT LAYER THICKNESS AND SHEAR STRESS RESISTANCE IN CYLINDRICAL DOWEL SPACES: PULL-OUT TEST

Case report, 439 - 447
doi: 10.11138/orl/2017.10.4.439
Tag this article
Abstract
Full text PDF
Purpose. This study evaluated the effects of different dowel space (DS) diameters on pull-out bond strength of a cylindrical post, of threaded steel, to dentin.
Materials and methods. Forty-five extracted human teeth were divided in 3 groups with DSs, with the same depth (6 mm), differing for the diameter (i.e. 1.5 mm, Group 1; 1.75 mm, Group 2; 2.00 mm, Group 3). Both the diameter of the post (1.3 mm) and the composite resin cement (Panavia 21) were the same for all the samples. The samples were submitted to pull-out test by means an Universal Testing Machine (Mod. 1193, Instron) (1KN load cell, crosshead speed 0.5 mm/min).
Results. The mean values of the bond strength (BS) were: Group 1, 442±128.3N; Group 2, 411.3±111N; Group 3, 448.7±142.29N. While the calculated average shear bond strengths (SBSs) were: Group 1, 14.7±4.27MPa; Group 2, 11.6±3.14MPa; Group 3, 11±3.5MPa. ANOVA test showed not significative differences, among the groups, concerning the BS: Group 1 vs Group 2 (p = 0.490); Group 1 vs Group 3 (p = 0.894); Group 2 vs Group 3 (p = 0.431). Significative differences were observed, among the groups, concerning the SBS for Group 1 vs Group 2 (p = 0.032) and Group 1 vs Group 3 (p = 0.014). While a not significative difference was found, concerning this parameter, for Group 2 vs Group 3 (p = 0.641).
Conclusion. The cement thickness can influence the SBS of the adhesively luted posts, in our setting, the best values were obtained with a thickness of 100 μm.

Vol. XI (No. 1) 2018 January-March

  1. INFRAOCCLUSION OF DECIDUOUS MOLARS: A RETROSPECTIVE ANALYSIS OF PREVALENCE, CHARACTERISTICS AND ASSOCIATION WITH OTHER DENTAL ANOMALIES
    Venza N., Danesi C., Cretella Lombardo E., Gazzani F., Laganà G.
    doi: 10.11138/orl/2018.11.1.001
  2. ACROMEGALY AND MODIFICATIONS OF THE CRANIOFACIAL COMPLEX: ORAL IMPLICATIONS
    Luzzi V., Guarnieri R., Ierardo G., Bossù M., Barbato E., Polimeni A.
    doi: 10.11138/orl/2018.11.1.010
  3. PERI-IMPLANT DISEASES AND CARDIOVASCULAR DISEASE: A SYSTEMATIC REVIEWS
    Papi P., Letizia C., Pompa G.
    doi: 10.11138/orl/2018.11.1.016
  4. COMBINING ORTHODONTIC EXTRUSION AND GUIDED BONE REGENERATION (GBR) FOR BONE AUGMENTATION AND IMPLANT PLACEMENT IN THE AESTHETIC ZONE: TECHNICAL ISSUES AND CASE REPORT
    Caberlotto M., Gobbo M., Bettio E., Soldini C., Ghensi P.
    doi: 10.11138/orl/2018.11.1.024
  5. IMMEDIATE IMPLANT PLACEMENT BY USING BONE-ALBUMIN ALLOGRAFT AND CONCENTRATED GROWTH FACTORS (CGFS): PRELIMINARY RESULTS OF A PILOT STUDY
    Inchingolo F., Ballini A., Georgakopoulos P.G., Inchingolo A.D., Tsantis S., De Vito D., Cantore S., Georgakopoulos I.P., Dipalma G.
    doi: 10.11138/orl/2018.11.1.031
  6. SOFT TISSUE TUNNEL ACCESS INTO THE MANDIBULAR MUCOSA TO OPTIMIZE THE RESULT OF LATERAL MANDIBULAR BONE GRAFTS
    Grecchi F., Gargari M., Grecchi E., Bianco R., Candotto V., Lauritano D.
    doi: 10.11138/orl/2018.11.1.041
  7. HEMIFACIAL MICROSOMIA: CASE REPORT AND LITERATURE REVIEW
    Grecchi F., Candotto V., Mancini G.E., Grecchi E., Gargari M., Lauritano D.
    doi: 10.11138/orl/2018.11.1.052
  8. MULTIDISCIPLINARY ENT-ORTHODONTIC TREATMENT IN A HYPERTENSIVE PATIENT AFFECTED BY SEVERE OSAS
    De Stefani A., Bruno G., Mezzofranco L., Perri A., Marchese Ragona R., Gracco A.
    doi: 10.11138/orl/2018.11.1.059
  9. EXTERNAL ROOT RESORPTION DUE TO IMPACTED THIRD MOLARS
    Kondylidou-Sidira A., Koliniotou-koumpia E., Kaklamanos E.G., Kavadia-Tsatala S., Antoniades K.
    doi: 10.11138/orl/2018.11.1.064
  10. HPV RELATED HEAD AND NECK CARCINOMA: A SHORT LITERATURE REVIEW ON TREATMENTS
    Candotto V., Gargari M., Gaudio R.M., Cura F., Baggi L., Arcuri C., Gatto R., Nardone M., Spadari F., Carinci F.
    doi: 10.11138/orl/2018.11.1.072
  11. MULTIPARAMETRIC EVALUATION OF FITTING ACCURACY FOR DIFFERENT COMBINATIONS OF IMPLANT-ABUTMENT COUPLING AT MARGINAL INTERFACE
    Marrelli M., Vertucci V., Amantea M., Maletta C., Codispoti B., Gargari M., Tatullo M.
    doi: 10.11138/orl/2018.11.1.077
Last Viewed articles: la lista degli ultimi x visitati.
  1. CEMENT LAYER THICKNESS AND SHEAR STRESS RESISTANCE IN CYLINDRICAL DOWEL SPACES: PULL-OUT TEST
    Andreasi Bassi M., Lauritano D., Brizzi M., Andrisani C., Lico S., Candotto V.
    doi: 10.11138/orl/2017.10.4.439
credits