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Root canal perforations are frequent but critical complications in endodontic treatments, which can pose a risk of irreversible damage to the affected tooth. These perforations typically occur during root canal preparation or endodontic post placement, presenting significant therapeutic challenges. The main objective in the management of such complications is to seal the perforation, thus preventing bacterial invasion and tooth loss. This report details the case of a 70‐year‐old patient with a perforation in the palatal wall of the middle root section of tooth #11. The treatment approach involved magnification techniques and the application of a bioactive material known as Biodentine. This case underscores the critical role of accurate radiographic evaluation and the use of biocompatible materials in the management of root perforations. Despite inherent challenges, proper diagnosis and planning, combined with appropriate techniques and materials, can lead to satisfactory results, effectively preserving the structure of the tooth. [ABSTRACT FROM AUTHOR]

Purpose: To evaluate the effect of different application modes of a recently introduced self-etching ceramic primer on the microshear bond strength (μSBS) and ceramic surface-etching pattern of two glass-ceramic surfaces. Materials and Methods: Twenty-two CAD/CAM blocks of lithium disilicate (LD) and feldspathic glass ceramic (VTR) were each cut into 4 rectangular sections (n = 88 for ceramic surface). The LD and VTR specimens were divided into one control group (hydrofluoric acid + silane coupling agent [HF+SII]), and 10 experimental groups using Monobond Etch and Prime (MEP) applied for a combination of scrubbing times (5, 10, 20, 40, and 60 s) and reaction times (20 or 40 s). After each treatment, Tygon matrices (n = 8) were filled with a resin cement and light cured for each ceramic specimen. The specimens were stored in water at 37°C for 24 h and subjected to the μSBS test. The failure pattern and μSBS were statistically evaluated (α = 0.05). In addition, the ceramic surface etching pattern was analyzed using scanning electron microscopy. Results: For the LD groups, the application of MEP 60/40 resulted in a higher mean μSBS compared to HF+SI (p < 0.05). Groups 5/40, 10/40, and 20/40 resulted in mean μSBS similar to that obtained by HF+SI (p > 0.05). For VTR, no significant difference was observed among the groups (p = 0.32). Compared with MEP, HF better promoted the dissolution of glass matrix for both ceramics. However, prolonged MEP scrubbing or reaction caused significant dissolution of the glass matrix for both evaluated ceramics. Conclusion: Active and prolonged application of MEP may be a viable alternative to HF+SI for increasing the bond strength to LD. [ABSTRACT FROM AUTHOR]

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Purpose: To evaluate the effect of different application modes of a recently introduced self-etching ceramic primer on the microshear bond strength (μSBS) and ceramic surface-etching pattern of two glass-ceramic surfaces., Materials and Methods: Twenty-two CAD/CAM blocks of lithium disilicate (LD) and feldspathic glass ceramic (VTR) were each cut into 4 rectangular sections (n = 88 for ceramic surface). The LD and VTR specimens were divided into one control group (hydrofluoric acid + silane coupling agent [HF+SII]), and 10 experimental groups using Monobond Etch and Prime (MEP) applied for a combination of scrubbing times (5, 10, 20, 40, and 60 s) and reaction times (20 or 40 s). After each treatment, Tygon matrices (n = 8) were filled with a resin cement and light cured for each ceramic specimen. The specimens were stored in water at 37°C for 24 h and subjected to the μSBS test. The failure pattern and μSBS were statistically evaluated (α = 0.05). In addition, the ceramic surface etching pattern was analyzed using scanning electron microscopy., Results: For the LD groups, the application of MEP 60/40 resulted in a higher mean μSBS compared to HF+SI (p < 0.05). Groups 5/40, 10/40, and 20/40 resulted in mean μSBS similar to that obtained by HF+SI (p > 0.05). For VTR, no significant difference was observed among the groups (p = 0.32). Compared with MEP, HF better promoted the dissolution of glass matrix for both ceramics. However, prolonged MEP scrubbing or reaction caused significant dissolution of the glass matrix for both evaluated ceramics., Conclusion: Active and prolonged application of MEP may be a viable alternative to HF+SI for increasing the bond strength to LD.