Moreno André Luiz de Melo, Campaner Marcio, de Moraes Melo Neto Clóvis Lamartine, Moreno Nathaly Vilene de Araújo, Dos Santos Daniela Micheline, Goiato Marcelo Coelho
Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil.
Courses in Dentistry (IEEP - Instituto de Excelência em Ensino e Pesquisa), Manaus, Amazonas, Brazil.
Eur J Dent. 2025 Feb;19(1):180-186. doi: 10.1055/s-0044-1787696. Epub 2024 Jul 16.
The aim of this study was to compare the Morse taper (MT) + titanium base (Ti-Base) abutment with the external hexagon (EH) + Ti-Base abutment by using the strain gauge method in the mesial, distal, and apical-buccal areas around these types of implants.
This study investigated two groups, MT and EH, each comprising five polyurethane samples with a dental implant (3.75 × 11.5 mm) in the area of artificial tooth 15. The strain gauges were glued to the mesial, distal, and apical-buccal polyurethane areas of all samples in relation to the implant. Ti-Base nonangled abutments were installed on the implants in each group. Ten identical zirconia crowns were constructed by scanning and milling and were subsequently cemented onto the Ti-base abutments with calcium hydroxide cement. Then, an axial load of 100 N was applied to the occlusal region of the zirconia crowns, and strain gauge measurements were taken.
Strain gauge data were assessed by a two-way analysis of variance (ANOVA) with "implant connection" and "strain gauge position" factors, followed by the Bonferroni test ( < 0.05).
The MT group showed significantly lower microstrain values in the mesial and apical strain gauges compared to the EH group.
The MT group exhibited less microstrain in the mesial and apical areas of the polyurethane samples near the implant. Consequently, the MT connection was considered more biomechanically advantageous.
本研究旨在通过应变片法比较莫氏锥度（MT）+钛基台与外六角（EH）+钛基台在这类种植体周围近中、远中及根尖-颊侧区域的情况。
本研究调查了两组，即MT组和EH组，每组包含五个聚氨酯样本，在人工牙15区域植入一枚牙种植体（3.75×11.5mm）。应变片粘贴在所有样本相对于种植体的近中、远中及根尖-颊侧聚氨酯区域。每组种植体上安装非角度钛基台。通过扫描和铣削制作十个相同的氧化锆全冠，随后用氢氧化钙水门汀粘结到钛基台上。然后，在氧化锆全冠的咬合区域施加100N的轴向载荷，并进行应变片测量。
应变片数据通过双因素方差分析（ANOVA）进行评估，因素为“种植体连接方式”和“应变片位置”，随后进行Bonferroni检验（P<0.05）。
与EH组相比，MT组在近中及根尖应变片处显示出显著更低的微应变值。
MT组在种植体附近聚氨酯样本的近中及根尖区域表现出更小的微应变。因此，MT连接方式在生物力学上更具优势。
