Ceddia Mario, Quaranta Nicola, Pontillo Vito, Murri Alessandra, Pantaleo Alessandra, Trentadue Bartolomeo
Department of Mechanics, Mathematics and Management, Polytechnic of Bari, 70125 Bari, Italy.
Department of Translational Biomedicine and Neuroscience, University of Bari Aldo Moro, 70125 Bari, Italy.
Materials (Basel). 2025 Jun 25;18(13):3002. doi: 10.3390/ma18133002.
This study investigates, for the first time, using finite element analysis (FEA), the differential impact of middle ear prosthesis diameter on hearing gain in two distinct surgical techniques: stapedotomy and partial stapedectomy. The model represented the cochlea as two fluid-filled straight channels separated by the basilar membrane and considered pistons of 0.4 mm and 0.6 mm diameters. The results demonstrated that in stapedotomy, a 0.6 mm diameter piston yielded a significantly better reduction in ABG (8.31 dB) compared to the 0.4 mm piston (10.67 dB), indicating improved hearing gain. Conversely, in partial stapedectomy, the smaller 0.4 mm piston was more effective, reducing ABG to 11.2 dB versus 12.12 dB with the larger piston. These findings highlight that the optimal prosthesis diameter varies according to surgical technique, emphasizing the need for tailored prosthesis selection.
本研究首次使用有限元分析（FEA），调查中耳假体直径对两种不同手术技术（镫骨切除术和部分镫骨切除术）听力增益的差异影响。该模型将耳蜗表示为由基底膜分隔的两个充满液体的直通道，并考虑了直径为0.4毫米和0.6毫米的活塞。结果表明，在镫骨切除术中，直径0.6毫米的活塞相比0.4毫米的活塞，在气骨导差（ABG）降低方面显著更好（分别为8.31分贝和10.67分贝），表明听力增益有所改善。相反，在部分镫骨切除术中，较小的0.4毫米活塞更有效，将ABG降低至11.2分贝，而较大活塞为12.12分贝。这些发现突出表明，最佳假体直径因手术技术而异，强调了定制假体选择的必要性。
