螺旋保留层状氧化锆冠与CAD/CAM钛基牙结合的生物学和力学稳定性:一项前瞻性封闭队列研究。

IF 1.7 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Michael R Norton
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引用次数: 1

摘要

目的:在1年和2年的随访中评估螺钉保留层状氧化锆冠与氮化钛涂层钛(TiN) CAD/CAM基台结合的硬软组织反应和机械完整性。材料与方法:对46例患者进行独立种植支撑层状氧化锆冠修复,共102个,在口腔实验室与各自的基牙结合,作为一体式螺钉保留冠交付。基线,1年和2年的数据整理口袋探探深度,探探出血,边缘骨水平和机械并发症。结果:46例患者中,4例患者无随访。这些患者未包括在分析中。在剩余的98个种植体中,由于全球大流行期间未能预约,在第一年记录了94个种植体的软组织测量,在第二年记录了86个种植体的软组织测量,平均颊/舌袋探测深度分别为1.80/1.95 mm和2.09/2.17 mm。在1年和2年期间,探查时的平均出血分别为0.50和0.53,根据研究方案,这表示介于无出血和斑点出血之间。第1年有74个种植体,第2年有86个种植体。与基线相比,1年的平均边缘骨变化为近端+0.11 mm和远端+0.19 mm, 2年的平均边缘骨变化为近端+0.24 mm和远端+0.16 mm。研究结束时,相对于参考点的最终骨水平为近端+0.49 mm,远端+0.19 mm。机械并发症包括1个单元(1%)轻微的冠缘错位,16个单元(16%)瓷断裂,12个单元(12%)< 5 Ncm(<初始预载荷的20%)的预载荷丢失。结论:采用成角螺钉通道与CAD/CAM螺钉保留基台结合的陶瓷冠具有较高的生物学和力学稳定性,总体骨增重,软组织健康状况良好,机械并发症有限,通常是瓷的小骨折,临床上预载荷损失不明显。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biologic and Mechanical Stability of Screw-Retained Layered Zirconia Crowns Bonded to CAD/CAM Titanium Abutments Using Angulated Screw Access: A Prospective Closed Cohort Study.

Purpose: To evaluate hard and soft tissue response and mechanical integrity for screw-retained layered zirconia crowns bonded to titanium nitride-coated titanium (TiN) CAD/CAM abutments supported by implants at 1- and 2-year follow-ups. Materials and Methods: A total of 46 patients were restored with a total of 102 free-standing implant-supported layered zirconia crowns, which were bonded to their respective abutments in the dental laboratory and delivered as a one-piece screw-retained crown. Baseline, 1-year, and 2-year data were collated on pocket probing depth, bleeding on probing, marginal bone levels, and mechanical complications. Results: Of the 46 patients, 4 patients with one implant each were not followed-up. These patients were not included in the analysis. Of the remaining 98 implants, due to failed appointments during the global pandemic, soft tissue measurements were recorded for 94 implants at year 1 and 86 implants at year 2, with a mean buccal/lingual pocket probing depth of 1.80/1.95 mm and 2.09/2.17 mm, respectively. Mean bleeding on probing was 0.50 and 0.53 at 1 and 2 years, which represents somewhere between no bleeding and a spot bleed according to the study protocol. Radiographic data were available for 74 implants at year 1 and 86 implants at year 2. The mean marginal bone change from baseline was +0.11 mm mesially and +0.19 mm distally at 1 year and +0.24 mm mesially and +0.16 mm distally at 2 years. The final bone level with respect to the reference point was +0.49 mm mesially and +0.19 mm distally at the end of the study period. Mechanical complications involving a slight misfit of the crown margin were recorded for one unit (1%), porcelain fracture for 16 units (16%), and a loss of preload for 12 units (12%) of < 5 Ncm (< 20% of initial preload). Conclusion: The biologic and mechanical stability of ceramic crowns bonded to CAD/CAM screw-retained abutments using angulated screw access was considered to be high, with overall bone gain, excellent soft tissue health, and only limited mechanical complications related to generally small fractures of the porcelain and a clinically insignificant loss of preload.

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来源期刊
CiteScore
3.30
自引率
5.00%
发文量
115
审稿时长
6 months
期刊介绍: Edited by Steven E. Eckert, DDS, MS ISSN (Print): 0882-2786 ISSN (Online): 1942-4434 This highly regarded, often-cited journal integrates clinical and scientific data to improve methods and results of oral and maxillofacial implant therapy. It presents pioneering research, technology, clinical applications, reviews of the literature, seminal studies, emerging technology, position papers, and consensus studies, as well as the many clinical and therapeutic innovations that ensue as a result of these efforts. The editorial board is composed of recognized opinion leaders in their respective areas of expertise and reflects the international reach of the journal. Under their leadership, JOMI maintains its strong scientific integrity while expanding its influence within the field of implant dentistry. JOMI’s popular regular feature "Thematic Abstract Review" presents a review of abstracts of recently published articles on a specific topical area of interest each issue.
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