Abuljadayel Roaa, Hashem Naif, Almaddah Yousef, Bakhsh Turki A
Restorative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21381, Saudi Arabia.
Faculty of Dentistry, King Abdulaziz University, Jeddah 21381, Saudi Arabia.
Heliyon. 2023 Jan 28;9(2):e13240. doi: 10.1016/j.heliyon.2023.e13240. eCollection 2023 Feb.
Up to date, the effect of cigarette smoke (CS) on the adhesive properties of the restorative materials bonded to tooth structure is still unclear. It is still questionable if it interferes with the durability and clinical success of these restorations. Few numbers of studies reported the assessment of microgaps of dental composite using cross-polarization optical coherence tomography (CP-OCT). The aim of this study was to evaluate the presence of interfacial microgaps between composite resin restoration and the tooth structure with or without exposure to CS under the CP-OCT.
In this in-vitro study, a standardized round class-V cavities were prepared in twenty extracted, caries-free human molar teeth, and they were divided randomly into two groups (n = 10). Adhesive system (Gluma universal, Kulzer GmbH) was applied followed by filing the prepared cavities with flowable composite restoration (Charisma, Kulzer GmbH). Then, exposure to CS (40 cigarettes/day) was carried out for 14 days and the samples were stored in normal saline solution after each smoke exposure cycle. Next, all samples were immersed in ammoniac silver nitrate for 24 h, followed by immersion in a photo-developing solution for 8 h. Optical comparison was carried out by CP-OCT to assess microgaps percentage between smoke (SG) and non-smoke groups (NSG) at the axial walls (AW) and cavity floor (CF).
Independent T-test showed that there was a significant difference between the two groups (SG, NSG) in AW microgaps percentage ( = 0.008), while there was no difference in CF (p = 0.15).
It can be inferred from the current finding that OCT can be used to predict the adaptability of the bonded restoration under the thermochemical influence. CS has a negative effect on the marginal integrity of the bonded polymeric restorations.
迄今为止，香烟烟雾（CS）对粘结于牙体组织的修复材料粘结性能的影响仍不明确。其是否会干扰这些修复体的耐久性和临床成功率仍存在疑问。少数研究报道了使用交叉偏振光学相干断层扫描（CP-OCT）评估牙科复合材料的微间隙。本研究的目的是在CP-OCT下评估复合树脂修复体与牙体组织之间界面微间隙的存在情况，无论是否暴露于CS。
在本体外研究中，在20颗拔除的、无龋的人磨牙上制备标准化的V类圆形洞，随机分为两组（n = 10）。应用粘结系统（Gluma通用型，库尔兹有限公司），然后用流动复合树脂修复材料（魅力，库尔兹有限公司）填充制备好的洞。然后，进行CS暴露（每天40支香烟）14天，每次烟雾暴露周期后将样本储存在生理盐水中。接下来，将所有样本浸入硝酸银氨溶液中24小时，然后浸入显影液中8小时。通过CP-OCT进行光学比较，以评估烟雾组（SG）和非烟雾组（NSG）在轴壁（AW）和洞底（CF）处的微间隙百分比。
独立T检验显示，两组（SG，NSG）在AW微间隙百分比上存在显著差异（= 0.008），而在CF处无差异（p = 0.15）。
从目前的研究结果可以推断，OCT可用于预测热化学影响下粘结修复体的适应性。CS对粘结聚合物修复体的边缘完整性有负面影响。
