Sagala P V S Tejaswini Yadav, Vemuri Sayesh, Guptha Anila Bandlapally Sreenivasa, Garlapati Roopadevi, Ravali Tsalla Krishna, Krishna Maddarapu Vamsi
Post Graduate, Department of Conservative Dentistry & Endodontics, Sibar Institute of Dental Sciences, Takkellapadu, Andhra Pradesh, India.
Professor & HOD, Department of Conservative Dentistry & Endodontics, Sibar Institute of Dental Sciences, Takkellapadu, Andhra Pradesh, India.
J Clin Exp Dent. 2025 Feb 1;17(2):e168-e173. doi: 10.4317/jced.62410. eCollection 2025 Feb.
To evaluate compressive strength of two composites with and without fiber reinforcement used as restorative material in incisal edge.
Sixty extracted human maxillary incisors were collected and divided into four groups (n=15). In group 1and 3: fracture line is beveled circumferentially, etched with 37% phosphoric acid gel for 15 seconds, bonding agent applied, and the lost tooth structure was incrementally built with nano-composites. In group 2 and 4: grooves are prepared for placing fibers. Fracture line is beveled circumferentially, fiber is placed into the flowable composite in the prepared groove area and remaining portion built incrementally with nano-composite. All samples were subjected to universal testing machine to evaluate compressive strength and observed in stereomicroscope to analyze mode of failure. The obtained data is analyzed using one-way ANOVA and Tukey's Post-hoc tests.
Group 2 and 4 showed significantly higher fracture resistance. No significant difference is observed between group 1 and 3, group 2 and 4. More mixed failure were seen in group 1 and 3 and cohesive failures in group 2 and 4.
Fiber reinforced composites have higher compressive strength which can be used as an treatment option for incisal edge fractures. Compressive strength, Failure modes, Fibers, Nanocomposites, Stereomicroscope, Universal testing machine.
评估两种有纤维增强和无纤维增强的复合材料作为切缘修复材料的抗压强度。
收集60颗拔除的人上颌切牙并分为四组（n = 15）。第1组和第3组：骨折线进行圆周斜面处理，用37%磷酸凝胶蚀刻15秒，涂抹粘结剂，用纳米复合材料逐步修复缺失的牙体结构。第2组和第4组：制备用于放置纤维的凹槽。骨折线进行圆周斜面处理，将纤维放入制备好的凹槽区域的可流动复合材料中，其余部分用纳米复合材料逐步构建。所有样本均在万能试验机上进行抗压强度评估，并在体视显微镜下观察以分析失效模式。所得数据采用单因素方差分析和Tukey事后检验进行分析。
第2组和第4组显示出显著更高的抗折性。第1组和第3组、第2组和第4组之间未观察到显著差异。第1组和第3组出现更多混合失效，第2组和第4组出现内聚性失效。
纤维增强复合材料具有更高的抗压强度，可作为切缘骨折的一种治疗选择。抗压强度、失效模式、纤维、纳米复合材料、体视显微镜、万能试验机。
