Mendonça Giovanna da Cunha, Tavares Karina Ines Medina Carita, Santos-Junior Airton Oliveira, Torres Fernanda Ferrari Esteves, Pinto Jáder Camilo, Guerreiro-Tanomaru Juliane Maria, Tanomaru-Filho Mário
Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil.
Department of Dentistry, University Center Presidente Antonio Carlos, Barbacena, Brazil.
J Conserv Dent Endod. 2024 Aug;27(8):817-821. doi: 10.4103/JCDE.JCDE_264_24. Epub 2024 Aug 7.
An acidic hydrogen potential (pH) in an inflammatory condition in the periapical tissues may affect the properties of repair bioceramic cement.
The aim of this study was to evaluate the effect of pH on the volumetric change of the ready-to-use bioceramic NeoPUTTY (NP) compared to the powder/liquid MTA Repair HP (MTAHP) after immersion in butyric acid (BA, pH 4.1) or phosphate-buffered saline (PBS, pH 7.35).
Dentin tubes filled with NP or MTAHP were scanned in micro-computed tomography (micro-CT) after 24 h. Then, the specimens were immersed in 1.5 mL of BA: NP/BA, MTAHP/BA or PBS: NP/PBS, MTAHP/PBS. After 7 days, new micro-CT scans were performed. The percentage of volumetric change (extremities and internal part) of the materials was assessed.
ANOVA/Tukey and Kruskal-Wallis tests were performed (α =0.05).
All materials showed a volumetric decrease after immersion in BA or PBS at the extremities in contact with the solutions. MTAHP/BA showed the highest volumetric loss. There was no difference in the volumetric change when the internal part of the materials was evaluated.
An acid pH negatively affects the volumetric stability of MTAHP. Low values of volumetric change were demonstrated for NP in both immersion environments.
根尖周组织炎症状态下的酸性氢电位（pH值）可能会影响修复生物陶瓷水泥的性能。
本研究的目的是评估与粉末/液体型MTA Repair HP（MTAHP）相比，即用型生物陶瓷NeoPUTTY（NP）在浸入丁酸（BA，pH 4.1）或磷酸盐缓冲盐水（PBS，pH 7.35）后，pH值对其体积变化的影响。
填充有NP或MTAHP的牙本质小管在24小时后进行微计算机断层扫描（micro-CT）。然后，将标本浸入1.5 mL的BA：NP/BA、MTAHP/BA或PBS：NP/PBS、MTAHP/PBS中。7天后，进行新的微计算机断层扫描。评估材料体积变化的百分比（末端和内部）。
进行方差分析/ Tukey检验和Kruskal-Wallis检验（α = 0.05）。
所有材料在浸入与溶液接触的末端的BA或PBS后均显示体积减小。MTAHP/BA显示出最高的体积损失。在评估材料内部时，体积变化没有差异。
酸性pH值对MTAHP的体积稳定性有负面影响。在两种浸入环境中，NP的体积变化值都很低。
