Assessment of the Different Types of Failure on Anterior Cantilever Resin-Bonded Fixed Dental Prostheses Fabricated with Three Different Materials: An In Vitro Study

background: resin-bonded fixed dental prosthesis (RBFDP) represents a highly aesthetic and conservative treatment option to replace a single tooth in a younger patient. The purpose of this in vitro study was to compare the fracture strength and the different types of failure on anterior cantilever RBFDPs fabricated using zirconia (ZR), lithium disilicate (LD), and PMMA-based material with ceramic fillers (PM) by the same standard tessellation language (STL) file. Methods: sixty extracted bovine mandibular incisives were embedded resin block; scanned to design one master model of RBFDP with a cantilevered single-retainer. Twenty cantilevered single-retainer RBFDPs were fabricated using ZR; LD; and PM. Static loading was performed using a universal testing machine. Results: the mean fracture strength for the RBFDPs was: 292.5 Newton (Standard Deviation (SD) 36.6) for ZR; 210 N (SD 37.6) for LD; and 133 N (SD 16.3) for PM. All the failures of RBFDPs in ZR were a fracture of the abutment tooth; instead; the 80% of failures of RBFDPs in LD and PM were a fracture of the connector. Conclusion: within the limitations of this in vitro study, we can conclude that the zirconia RBFDPs presented load resistance higher than the maximum anterior bite force reported in literature (270 N) and failure type analysis showed some trends among the groups

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Comparison of Fracture Strengths among different Commonly Placed Anterior Esthetic Restorations for Primary Dentition: An in vitro study

Journal of Clinical Pediatric Dentistry ◽

10.17796/1053-4625-45.3.5 ◽

2021 ◽

Vol 45 (3) ◽

pp. 171-176

Author(s):

Brent Lin ◽

Amit Khatri ◽

Michael Hong

Keyword(s):

Fracture Strength ◽

Testing Machine ◽

In Vitro Study ◽

Vitro Study ◽

Anterior Teeth ◽

Study Results ◽

Luting Cement ◽

Significant Difference ◽

All Ceramic

The purpose of this study was to determine and compare the shear force (N) required to fracture or dislodge an all-ceramic zirconia-based crown using different luting cement with those of polycarbonate crown and strip crown for the primary anterior teeth in vitro. Study design: Four groups of esthetic restoration for primary anterior teeth were tested for fracture strength: 1) Fifteen all-ceramic zirconia-based crowns cemented with glass ionomer cement, 2) Fifteen all-ceramic zirconia-based crowns bonded with a self-adhesive resin cement, 3) Fifteen polycarbonate crowns cemented with a polymer reinforced zinc-oxide eugenol and 4) Fifteen resin strip crowns. All restorations were placed and cemented on reproductions of dies in an independent laboratory at Delhi, India. All samples underwent loading until fracture or dislodgement with the Universal Testing Machine. The force in Newton (N) required to produce failure was recorded for each sample and the type of failures was also noted and characterized. One-way analysis of variance (ANOVA) test and the Tukey and Scheffe’s post hoc comparisons were used for statistical analyses. Results: In this invitro study, results were measured in Newtons (N). Group 1 (410.9±79.5 N) and Group 2 (420.5±57.8 N) had higher fracture strength than Group 3 (330.3±85.6 N) and Group 4 (268.4±28.2 N). These differences were statistically significant at P≤.05 among the sample groups. No significant difference was found between groups 1 and 2 (P = 0.984) nor between groups 3 and 4 (P =0.104). Among type of failures, majority of restoration fractures for zirconia-based crowns and resin strip crowns were due to cohesive failures and polycarbonate crowns had predominantly mixed failures. Conclusions: Under the limitations of this in vitro study, it could be concluded that all-ceramic zirconia-based crowns attained the highest fracture strength among all restorative samples tested regardless of the type of luting agent employed (P<.01). Cohesive failures were commonly observed in the zirconia crowns and resin strip crowns, whereas polycarbonate crowns revealed predominately mixed failures.

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Comparative Evaluation of Fracture Strength of Different Types of Composite Core Build-up Materials: An in vitro Study

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-2291 ◽

2018 ◽

Vol 19 (5) ◽

pp. 507-514 ◽

Cited By ~ 1

Author(s):

Lalit Kumar ◽

Srinivasa Gowda ◽

Dilip D Quadras ◽

Shetty R Sesappa ◽

GR Ramakrishna Maiya

Keyword(s):

Fracture Strength ◽

Comparative Evaluation ◽

In Vitro Study ◽

Vitro Study ◽

Different Types

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The effect of frog pressure and downward vertical load on hoof wall weight-bearing and third phalanx displacement in the horse - an in vitro study : research communication

Journal of the South African Veterinary Association ◽

10.4102/jsava.v72i4.656 ◽

2001 ◽

Vol 72 (4) ◽

Cited By ~ 1

Author(s):

A. Olivier ◽

J. Wannenburg ◽

R.D. Gottschalk ◽

M.J. Van der Linde ◽

H.T. Groeneveld

Keyword(s):

Solar Surface ◽

Weight Bearing ◽

Testing Machine ◽

Vertical Component ◽

In Vitro Study ◽

Vitro Study ◽

Total Weight ◽

Strain Gauges ◽

Tensile Testing Machine

A shoe was designed to combine the advantages of a reverse shoe and an adjustable heart bar shoe in the treatment of chronic laminitis. This reverse even frog pressure (REFP) shoe applies pressure uniformly over a large area of the frog solar surface. Pressure is applied vertically upward parallel to the solar surface of the frog and can be increased or decreased as required. Five clinically healthy horses were humanely euthanased and their dismem-bered forelimbs used in an in vitro study. Frog pressure was measured by strain gauges applied to the ground surface of the carrying tab portion of the shoe. A linear variable distance transducer (LVDT) was inserted into a hole drilled in the dorsal hoof wall. The LVDT measured movement of the third phalanx (P3) in a dorsopalmar plane relative to the dorsal hoof wall. The vertical component of hoof wall compression was measured by means of unidirectional strain gauges attached to the toe, quarter and heel of the medial hoof wall of each specimen. The entire limb was mounted vertically in a tensile testing machine and submitted to vertical downward compressive forces of 0 to 2500 Nat a rate of 5 cm/minute. The effects of increasing frog pressure on hoof wall weight-bearing and third phalanx movement within the hoof were determined. Each specimen was tested with the shoe under the following conditions: zero frog pressure; frog pressure used to treat clinical cases of chronic laminitis (7 N-cm); frog pressure clinically painful to the horse as determined prior to euthanasia; frog pressure just alleviating this pain. The specimens were also tested after shoe removal. Total weight-bearing on the hoof wall at zero frog pressure was used as the basis for comparison. Pain-causing and pain-alleviating frog pressures decreased total weight-bearing on the hoof wall (P < 0.05). Frog pressure of 7 N-cm had no statistically significant effect on hoof wall weight-bearing although there was a trend for it to decrease as load increased. Before loading, the pain-causing and pain-alleviating frog pressures resulted in a palmar movement of P3 relative to the dorsal hoof wall compared to the position of P3 at zero frog pressure (P < 0.05). This difference remained statistically significant up to 1300 Nload. At higher loads, the position of P3 did not differ significantly for the different frog pressures applied. It is concluded that increased frog pressure using the REFP shoe decreases total hoof wall weight-bearing and causes palmar movement of P3 at low weight-bearing loads. Without a shoe the toe and quarter hoof wall compression remained more constant and less in magnitude, than with a shoe.

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In-Vitro Study of Bacterial Adherence to Different Types of Intraocular Lenses

Drug Development and Industrial Pharmacy ◽

10.1081/ddc-120001490 ◽

2002 ◽

Vol 28 (1) ◽

pp. 95-99 ◽

Cited By ~ 20

Author(s):

Carole Burillon ◽

Laurent Kodjikian ◽

Gérard Pellon ◽

Annie Martra ◽

Jean Freney ◽

...

Keyword(s):

In Vitro Study ◽

Bacterial Adherence ◽

Vitro Study ◽

Intraocular Lenses ◽

Different Types

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The Influence of Using Different Types of Scan Bodies on the Transfer Accuracy of Implant Position: An In Vitro Study

The International Journal of Prosthodontics ◽

10.11607/ijp.6796 ◽

2021 ◽

Vol 34 (2) ◽

pp. 254-260

Author(s):

Alexander Schmidt ◽

Jan-Wilhelm Billig ◽

Maximiliane Schlenz ◽

Bernd Wöstmann

Keyword(s):

In Vitro Study ◽

Vitro Study ◽

Implant Position ◽

Different Types ◽

Transfer Accuracy

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Evaluation of the marginal microleakage of CAD-CAM compared with conventional interim crowns luted with different types of cement: An in-vitro study

Nigerian Journal of Clinical Practice ◽

10.4103/njcp.njcp_374_20 ◽

2021 ◽

Vol 24 (6) ◽

pp. 828

Author(s):

A Robaian ◽

A Maawadh ◽

ZI Alghomlas ◽

AM Alqahtani ◽

TA Alothman ◽

...

Keyword(s):

In Vitro Study ◽

Vitro Study ◽

Different Types ◽

Cad Cam

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Efficacy of Fiber Post Bonding To Root Dentin after Different Obturation Techniques and Cementation Timings: In Vitro Study

Open Access Macedonian Journal of Medical Sciences ◽

10.3889/oamjms.2018.343 ◽

2018 ◽

Vol 6 (9) ◽

pp. 1707-1711

Author(s):

Rami M. Atia ◽

Nada Omar ◽

Haidy Nabil ◽

Yousra Aly

Keyword(s):

Bond Strength ◽

Statistical Significance ◽

Testing Machine ◽

In Vitro Study ◽

Resin Cement ◽

Vitro Study ◽

Endodontically Treated Teeth ◽

Root Dentin ◽

Push Out

OBJECTIVE: The aim of this in vitro study was to assess the effect of obturation technique and cementation timings on the bonding of fibre-reinforced posts to the root canal walls. METHODS: Twenty extracted teeth were randomly allocated to two groups according to the obturation technique and cementation timing. Central incisors with single canals were used after being decoronated. Every extracted tooth of the {vertical compaction group} (VC) group (n = 10) had been obturated using the {E & Q plus obturation system} with posts cemented in the same day; The other (CO) conventional group (n = 10) teeth were obturated using the conventional lateral compaction technique and posts cemented after one week. “SF“ Fiber posts were used after bonding and cementation using Rely X ARC resin cement with all the endodontically treated teeth. The push-out test was performed in a universal testing machine. Data were analysed by 2 way analysis of variance with Statistical significance was set to 0.05. RESULTS: Heat softened gutta percha group showed more push out the bond strength of the bonded posts than the conventional obturation group (p < 0.05). In the middle region, there was no statistical significance between the two groups while there was significance in the coronal and apical thirds. CONCLUSION: The vertical compaction technique and early cementation improved the bond strength of the resin posts in comparison to the conventional obturation technique with late cementation.

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