The influence of FRC base and bonded CAD/CAM resin composite endocrowns on fatigue behavior of cracked endodontically-treated molars

Otero, Clara Anton Y.; Bijelic-Donova, Jasmina; Saratti, Carlo Massimo; Vallittu, Pekka K.; Bella, Enrico Di; Krejci, Ivo; Rocca, Giovanni Tommaso

doi:10.1016/j.jmbbm.2021.104647

Cited by 6 publications

(9 citation statements)

References 32 publications

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“…44 Several studies have indicated that teeth restored with SFC as a bulk core under composite restorations had higher load-bearing capacity. [45][46][47][48] Contrary to these studies, there were no significant differences in load-bearing capacity between the single-structure (without FRC) and bistructured (with FRC) groups in the current study. Such differences could be due to the thickness of the FRC core, cavity design, severity of the aging process and CAD/CAM material.…”

Section: Discussioncontrasting

confidence: 99%

“…Although many studies have investigated the load bearing effect of FRCs under composite restorations of ETTs, only a limited number of studies have investigated the effect of FRCs under CAD/CAM materials. [48][49][50][51] Rocca et al 51 compared the fracture resistance and fracture pattern of endodontically treated molars restored with resin nanoceramic CAD/CAM material (Lava Ultimate) either with an endocrown without fiber reinforcement or overlays with different types of fiber reinforced cavities. It was found that reinforcement did not improve fracture resistance, and all samples fractured under the CEJ in a nonrepairable manner.…”

Section: Discussionmentioning

confidence: 99%

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Fracture resistance of resin endocrowns with and without fiber reinforced composite base material: A preliminary study

Büyükbayram

Güven

Ayman³

et al. 2023

Journal of Applied Biomaterials & Functional Materials

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Objective: The aim of this study was to investigate the effects of fiber-reinforced composite base material on fracture resistance and fracture pattern of endodontically treated maxillary premolars restored with endocrowns using two different resin nanoceramic computer-aided design and computer-aided manufacturing (CAD/CAM) restorative material. Methods: Forty extracted sound maxillary premolars with an occlusal reduction of 2 mm above the cementoenamel junction (CEJ) was performed following root canal treatment. Mesial interproximal box was prepared for each tooth at the margin of the CEJ and randomly distributed into four groups ( n = 10) as follows: Group A, no resin build-up in the pulp chamber; Group B, 2 mm of fiber-reinforced composite (FRC) build-up (EverX Posterior, GC).; Group C, no resin build-up in pulp chamber; Group D, 2 mm of FRC build-up. Groups A and B were prepared with resin nanoceramic (RNC) consisting ceramic nanofillers (Lava Ultimate 3 M ESPE), while Group C and D were prepared with RNC consisting ceramic nanohybrid fillers (Cerasmart GC Corp). All samples were subjected to 1,200,000 chewing cycles (1.6 Hz, 50 N) and 5000 thermal cycles (5°C–55°C) for artificial aging on a chewing simulator with thermal cycles (CSTC). Samples that survived the CSTC test without being damaged were subjected to a load-to-fracture test. Results: The highest mean fracture strength was found in Group D (936.0 ± 354.7) and lowest in Group A (684.2 ± 466.9). Fracture strength was higher in groups where FRC was used as a base material than plain restorations. However, there were no significant differences between the Lava and Cerasmart groups with and without FRC ( p > 0.05). Most of the samples were irreparably fractured under CEJ. Conclusion: Using short FRCs as a resin base material did not significantly improve fracture resistance. Cerasmart and Lava blocks had similar fracture resistance and fracture pattern.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fracture resistance of resin endocrowns with and without fiber reinforced composite base material: A preliminary study

Büyükbayram

Güven

Ayman³

et al. 2023

Journal of Applied Biomaterials & Functional Materials

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“…In contrast, Kassis et al and Rocca et al found no differences in fracture mode when a SFRC base was used in comparison to other composite materials, mainly because of the large thickness of the restoration. 40,41 The latter research group reported 5 years later that an SFRC base does not improve the fracture resistance but favorably alters the fracture mode 42 as did de Kuijper et al describe a high amount of repairable fractures (about 2/3) in the SFRC reinforced core-and-crown group. 31 Although the comparison with similar studies is limited because of the large heterogeneity in the factors that may influence the outcome of the study, such as tested materials, preparation forms, luting materials, volume of the restorations, artificial aging technique, and the loading angle.…”

Section: Discussionmentioning

confidence: 94%

The fracture strength and the failure mode of lithium disilicate or resin nano ceramics as a crown, overlay, or endocrown restoration on endodontically treated teeth

Vervack,

Johansson,

Coster

et al. 2023

J Esthet Restor Dent

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IntroductionDifferent materials and restorative concepts have been proposed over the years to restore endodontically treated teeth (ETT). Monolithic ceramic and composite restoration can be lute to the tooh, without the use of a post. However, little is known how the material stiffness and presence of a composite core will affect the survival and failure mode.The objective of this in‐vitro study was to evaluate the fracture strength and failure mode of endodontically treated molars, restored with ceramic or hybrid composite monolithic restoration, in the presence of absence of a composite core.Materials and MethodsSixty depulped molars were restored with a lithium‐disilicate (e.max CAD) or hybrid composite (Cerasmart) restoration. Both materials were used in a monolithic approach, but with 3 different designs: (a) monolithic endocrown, (b) crown with a separate composite core, and (c) overlay without core buildup or pulpal extension. Ten sound teeth were used as control group. All groups were thermocycled (10,000 cycles), subsequently loaded in a chewing simulator (100,000 cycles) and finally loaded until fracture.ResultsPeak fracture loads and failure modes were registered. No significant differences were seen between the groups in terms of fracture load. Failure modes were statistically significantly different among groups with significant correlation between restoration type and material. (p < 0.001 and p = 0.033, respectively). No group presented significantly higher fracture resistance. Although ceramic crowns and overlays presented the highest repairability, all restored ETT were within the range of the intact tooth' fracture strength.ConclusionNo restoration presented significant different fracture loads. However, the type of restoration and material choice were correlated to the fracture mode.

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“…As regards to endocrowns, Lin et al ( 2013 ) remarked that they provided comparable fracture resistance to crowns in cases of shallow cracks (about 1 mm above bone level), but they showed a higher failure risk for deep cracks (below bone level to mid‐root), especially under increased occlusal forces (above 250 N). Furthermore, a fiber‐reinforced base did not significantly affect the fracture resistance of teeth restored with endocrowns, but it resulted in more fractures being restorable (50%–80%) in comparison to the control group (30%), which included a base of flowable composite (Anton Y. Otero et al, 2021 ). It should be mentioned though that both the above in vitro studies did not evaluate the effect of lateral forces, which are crucial for cracked teeth from a clinical point of view (de Toubes et al, 2022 ; Kanamaru et al, 2017 ).…”

Section: Outcomes Of Endodontically Treated Cracked Teethmentioning

confidence: 99%

“…Alternatives to crowns included direct composite restorations (Lu et al, 2021 ; Malentacca et al, 2021 ; Nguyen Thi & Jansson, 2021 ) and indirect onlays (de Toubes et al, 2022 ) (Figure 6 ). Regarding endocrowns, there is a lack of clinical evidence since relevant data derive from laboratory studies (Anton Y Otero et al, 2021 ; Lin et al, 2013 ) (Table 4 ).…”

Section: Restorative Approaches For Cracked Teeth Requiring Endodonti...mentioning

confidence: 99%

Treatment of cracked teeth: A comprehensive narrative review

Kakka

Gavriil

Whitworth

2022

Clinical & Exp Dental Res

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Objectives The term “cracked tooth” is used to describe an incomplete fracture initiated from the crown and progressing towards a subgingival direction. Despite the high prevalence of cracked teeth and their frequent association with symptoms and pulpal or periapical pathoses, there is still no consensus in the literature with regard to their restorative and endodontic management. Therefore, the aim of this narrative review was to evaluate the most relevant research and provide an up‐to‐date comprehensive overview regarding the treatment of cracked teeth. Materials and Methods An electronic literature search was carried out in MEDLINE (via Ovid), Embase (via Ovid), Scopus, and Web of Science as well as several “Grey literature” sources up to February 22nd 2022 using a combination of pre‐specified ‘free‐text' terms (keywords) and “subject headings.” The search process was supplemented by handsearching in relevant dental journals and reference lists. This narrative review focused on clinical follow‐up studies (observational or interventional studies, case series/reports), laboratory studies and systematic reviews written in English language that reported data on treatment of permanent cracked teeth. The selection of relevant studies was carried out by two reviewers (AK and DG) working independently in two consecutive stages: title/abstract screening and full‐text retrieval. Any discrepancies in the study selection were resolved by discussion between the reviewers. Results In total, 64 articles were selected for inclusion in this narrative review. Conclusions Cracked teeth with normal pulp or reversible pulpitis have exhibited high pulp and tooth survival rates by the provision of direct or indirect composite restorations. Besides, recent data favour monitoring, especially in the absence of symptoms or compromised tooth structure. When endodontic intervention is required, current evidence suggests that along with appropriate restorative management, outcomes of cracked teeth may be comparable to those of non‐cracked root filled teeth.

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The influence of FRC base and bonded CAD/CAM resin composite endocrowns on fatigue behavior of cracked endodontically-treated molars

Cited by 6 publications

References 32 publications

Fracture resistance of resin endocrowns with and without fiber reinforced composite base material: A preliminary study

Fracture resistance of resin endocrowns with and without fiber reinforced composite base material: A preliminary study

The fracture strength and the failure mode of lithium disilicate or resin nano ceramics as a crown, overlay, or endocrown restoration on endodontically treated teeth

Treatment of cracked teeth: A comprehensive narrative review

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