Comparison of the Fracture Resistance and Fracture Mode of Contemporary Restorative Materials to Overcome the Offset of Mandibular Implant-Supported, Cement-Retained Crowns
| Autor: | Shoq Alolayan, Ibraheem F Alshiddi, Salwa Omar Bajunaid, Rania Almutairi, Syed Rashid Habib, Lamya Alhomaidhi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Molar
Technology Materials science medicine.medical_treatment Abutment Article stomatognathic system medicine General Materials Science Cubic zirconia Dental implant implant offset Orthodontics Universal testing machine Microscopy QC120-168.85 dental implant Coping (architecture) porcelain fused to metal QH201-278.5 technology industry and agriculture dental crown Engineering (General). Civil engineering (General) TK1-9971 stomatognathic diseases Descriptive and experimental mechanics Veneer Implant lithium disilicate Electrical engineering. Electronics. Nuclear engineering TA1-2040 zirconia |
| Zdroj: | Materials, Vol 14, Iss 4838, p 4838 (2021) Materials Volume 14 Issue 17 |
| ISSN: | 1996-1944 |
| Popis: | Background: The purpose was to compare the fracture resistance and the mode of failure of different contemporary restorative materials to restore implant supported, cement-retained mandibular molars. Methods: Two 5 × 10 mm titanium dental implants were mounted in resin blocks and prefabricated titanium and zirconia abutments were connected to each implant. Each implant received forty crowns resembling mandibular first molars. The specimens were divided into four groups (n = 10/group) for each abutment according to the type of material Group A: porcelain fused to metal crowns Group B: monolithic zirconia crowns Group C: zirconia coping with ceramic veneer Group D: all ceramic lithium disilicate crowns. Specimens were cemented to the abutments, mounted into a universal testing machine, and vertical static load was applied at a speed of 1 mm/min. The test stopped at signs of visual/audible fracture/chipping. Fracture resistance values were analyzed using ANOVA and Tukey’s tests (α ≤ 0.05). The modes of failure were visually observed. Results: A statistically significant difference (p < 0.001) of the fracture resistance values among tested groups was found. The group that showed the highest fracture resistance was Group A for both the titanium and the zirconia abutments (3.029 + 0.248 and 2.59 ± 0.39, respectively) while Group D for both abutments (1.134 + 0.289 and 1.68 ± 0.13) exhibited the least resistance. Conclusions: Fracture resistance and fracture mode varied depending on type of restorative material. For both titanium and zirconia abutments, porcelain fused to metal showed the highest fracture resistance values followed by monolithic zirconia. |
| Databáze: | OpenAIRE |
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