Mohamed Sara Zaky, Ghobashy Mohamed Mohamady, Taymour Noha, Abdelwahab Safinaz, Srimaneepong Viritpon, Rokaya Dinesh
Department of Prosthodontics, Faculty of Dentistry, Zarqa University, Zarqa, 13110, Jordan.
Department of Prosthodontics, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt.
Heliyon. 2024 Oct 31;10(21):e40017. doi: 10.1016/j.heliyon.2024.e40017. eCollection 2024 Nov 15.
Denture fracture is a common problem with acrylic dentures. The fractured denture can be repaired using various techniques such as self-cure acrylic resin acrylic resin and fiber-reinforced acrylic resin.
The purpose of this study was to compare the accuracy of dentures repaired with self-cure acrylic resin and fiber-reinforced acrylic resin processed using two different techniques (long-cure and microwave processing).
A total of 20 maxillary complete dentures were processed with two techniques; heat (long cycle) processing (10 dentures) and microwave processing (10 dentures). The maxillary cast and denture surface were scanned with Medit intraoral (Medit i700, Medit, South Korea) and STL files were created. Then, the dentures were sectioned at the midline and repaired using self-cure acrylic resin and fiber-reinforced acrylic resin and scanned with Medit intraoral. Finally, adaptation deviations were analyzed from computer software (Geomagic Control X, 3D Systems Inc., USA). The adaptation deviations in each group (long cure and microwave) were compared using an Independent T-test. Two-way ANOVA was done to see whether curing techniques and repairing methods affect the accuracy of repair. A P-value of 0.05 was considered significant.
The adaptation deviation was slightly higher in the fiber-reinforced acrylic resin group (0.565 ± 0.093) than in the self-cure acrylic resin group (0.536 ± 0.066). However, there was no statistical difference in the adaptation deviations of repaired dentures with self-cure acrylic resin and fiber-reinforced acrylic resin in the long-curing (P-value 0.245) and the microwave (P-value 0.638). Similarly, the adaptation deviation was slightly higher in the long-curing group (0.577 ± 0.075) than in the microwave group (0.524 ± 0.079). However, there was a statistically significant difference in the adaptation deviation of repaired dentures between long-curing and microwave techniques with self-cure acrylic resin (P-value 0.016) but no difference in fiber-reinforced acrylic resin (P-value 0.127). The result of Two-way ANOVA shows that there is no statistically significant interaction between curing techniques (long curing and microwave) and repairing methods (self-cure acrylic resin and fiber-reinforced acrylic resin) for adaptation deviations (P-value 0.646). However, the curing techniques show statistically significant differences (P-value 0.039).
Acrylic dentures can be repaired with self-cure resin or fiber-reinforced self-cure resin using various processing methods. The accuracy of the denture after repair is unaffected by the repairing method (self-cure acrylic resin and fiber-reinforced acrylic resin) but the accuracy of the denture after repair is affected by the curing techniques (long-curing and microwave). In self-cure resin, the microwave processing showed higher adaptation deviation and less accuracy, whereas the long-curing processing showed lower adaptation deviation and high accuracy.
义齿折断是丙烯酸树脂义齿常见的问题。折断的义齿可用多种技术修复，如自凝丙烯酸树脂、丙烯酸树脂和纤维增强丙烯酸树脂。
本研究的目的是比较用自凝丙烯酸树脂和纤维增强丙烯酸树脂修复的义齿的准确性，这两种树脂采用两种不同技术（长时间固化和微波处理）加工。
共20副上颌全口义齿采用两种技术加工；热（长周期）加工（10副义齿）和微波加工（10副义齿）。用上颌模型和义齿表面用Medit口内扫描仪（Medit i700，Medit，韩国）扫描并创建STL文件。然后，义齿在中线处切开，用自凝丙烯酸树脂和纤维增强丙烯酸树脂修复，并用Medit口内扫描仪扫描。最后，通过计算机软件（Geomagic Control X，3D Systems Inc.，美国）分析适配偏差。使用独立T检验比较每组（长时间固化和微波）的适配偏差。进行双向方差分析以查看固化技术和修复方法是否影响修复的准确性。P值为0.05被认为具有统计学意义。
纤维增强丙烯酸树脂组的适配偏差（0.565±0.093）略高于自凝丙烯酸树脂组（0.536±0.066）。然而，在长时间固化（P值0.245）和微波（P值0.638）情况下，用自凝丙烯酸树脂和纤维增强丙烯酸树脂修复的义齿的适配偏差没有统计学差异。同样，长时间固化组的适配偏差（0.577±0.075）略高于微波组（0.524±0.079）。然而，在使用自凝丙烯酸树脂修复的义齿的适配偏差方面，长时间固化和微波技术之间存在统计学显著差异（P值0.016），但在纤维增强丙烯酸树脂方面没有差异（P值0.127）。双向方差分析结果表明，在适配偏差方面，固化技术（长时间固化和微波）和修复方法（自凝丙烯酸树脂和纤维增强丙烯酸树脂）之间没有统计学显著的相互作用（P值0.646）。然而，固化技术显示出统计学显著差异（P值0.039）。
丙烯酸树脂义齿可用自凝树脂或纤维增强自凝树脂通过多种加工方法修复。修复后义齿的准确性不受修复方法（自凝丙烯酸树脂和纤维增强丙烯酸树脂）的影响，但修复后义齿的准确性受固化技术（长时间固化和微波）的影响。在自凝树脂中，微波处理显示出较高的适配偏差和较低的准确性，而长时间固化处理显示出较低的适配偏差和较高的准确性。
