Calvo-Guirado Josè Luis, Delgado Ruiz Rafael Arcesio, Ramírez-Fernández Maria Piedad, Abboud Marcus, Janjic Bojan, Maté Sánchez de Val Jose Eduardo
Department of General and Implant Dentistry, University of Murcia, Murcia, Spain.
Department of Prosthodontics and Digital Technologies, Stony Brook University, Stony Brook, NY, USA.
Clin Oral Implants Res. 2016 Apr;27(4):497-504. doi: 10.1111/clr.12569. Epub 2015 Feb 9.
Narrow-diameter implants provide an alternative to the horizontal augmentation techniques situations severe bone atrophy. Lack of bone width and interdental space has been regarded as an encumbrance in the case selection for prosthetic rehabilitation using dental implants.
The aim of the study was to evaluate bone-to-implant contact and marginal bone loss of two different narrow implants in resorbed ridges at different crestal positions.
48 Bredent Narrow(®) implants (24 MiniSky(®) and NarowSky(®) ) were placed at crestal and subcrestal levels in healing bone of atrophic alveolar ridge of 6 American foxhounds. Histological and histomorphometric analyses of osseointegration were carried out at 4 and 8 weeks.
Modeling in the marginal defect region was accompanied by marked decreases in the dimensions of both the buccal and the more lingual bone walls. Relative to BIC, significant differences were found in favor of subcrestal group, for both Narrow Sky and MiniSky. Linear measurements showed to be slightly high in the crestal group. With significant differences for PM-IS (peri-implant mucosa to implant shoulder) and IS-BC (implant shoulder to buccal bone crest).
Within the limitations of animal study, it can be stated that the NarrowSky(test group) crestal and subcrestal implants showed less crestal bone resorption, higher ISQ values and most BIC at 4 and 8 weeks of evaluation compared with MiniSky implants (control group). The design of the implants plays an important role in peri-implant mucosa and crestal bone maintenance at 8-week follow-up period.
窄直径种植体为严重骨萎缩情况下的水平骨增量技术提供了一种替代方案。骨宽度不足和牙间隙被视为使用牙种植体进行修复性康复病例选择中的障碍。
本研究的目的是评估两种不同窄种植体在不同嵴顶位置的吸收性牙槽嵴中骨与种植体的接触情况以及边缘骨丢失情况。
将48枚Bredent Narrow（®）种植体（24枚MiniSky（®）和24枚NarowSky（®））植入6只美国猎狐犬萎缩性牙槽嵴愈合骨的嵴顶和嵴下水平。在4周和8周时进行骨结合的组织学和组织形态计量学分析。
边缘缺损区域的塑形伴随着颊侧和更舌侧骨壁尺寸的显著减小。相对于骨与种植体接触（BIC），Narrow Sky和MiniSky的嵴下组均存在显著差异，有利于嵴下组。线性测量显示嵴顶组略高。种植体周围黏膜至种植体肩部（PM-IS）和种植体肩部至颊侧骨嵴（IS-BC）存在显著差异。
在动物研究的局限性内，可以说与MiniSky种植体（对照组）相比，NarrowSky（试验组）的嵴顶和嵴下种植体在评估的4周和8周时显示出更少的嵴顶骨吸收、更高的种植体稳定性商数（ISQ）值和更多的骨与种植体接触。在8周随访期，种植体设计在种植体周围黏膜和嵴顶骨维持方面起着重要作用。
