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EAO-286 / OC-PIB-004 | The effect of vertical level discrepancy of adjacent dental implants on marginal bone loss
Clinical Oral Implants Research ( IF 4.3 ) Pub Date : 2021-12-28 , DOI: 10.1111/clr.23_13855


Vahid Khoshkam1,*; Azadeh Tavari2; Kian Kar3; Neema Bakhshalian3; Homayoun Zadeh4

1Private Practice, El Paso; 2Private practice; 3Periodontology, University of Southern California, Los Angeles; 4Private Practice, Woodland Hills, United States

Background: The purpose of the present study was to investigate the effect of relative vertical and horizontal position of adjacent implants on peri-implant marginal bone level (MBL) alterations.

Aim/Hypothesis: The null hypothesis tested in the present study was that the spatial relationship of adjacent implants is not associated with peri-implant marginal bone level changes.

Material and Methods: Radiographic records of patients, who had received 2 or 3 adjacent implants with a minimum follow up of one year post loading at two centers were examined.

Inclusion criteria were as follows: 1) Multiple adjacent dental implants restored with splinted or non-splinted fixed restorations 2) Availability of diagnostic quality radiographs at the time of implant placement, prosthesis installation and at least one-year post loading 3) The implants had to be placed in the maxillary or mandibular posterior segments 4) Screw type rough surface implants with an internal or external connection placed equicrestally, supracrestally or subcrestally

Exclusion criteria were as following: 1) Implants that were placed in fresh socket or immediately loaded

2) Adjacent implants placed at different times 3) Restorations with cantilever extension 4) Any grafting procedure at the time of implant placemen 5) Radiographs with indiscernible implant threads 6) Heavy smoker patients (More than 10 cigarettes daily)

Results: 65 patients (mean age 59 ± 8.9 years), contributing 153 implants and mean follow up of 57.2 ± 0.3 months met the inclusion/exclusion criteria. The spatial relationships of adjacent implants included horizontal inter-implant distance (HID) of 3.36 ± 1.49 and vertical level discrepancy (VLD) with mean of 1.44 ± 0.86 mm. In sites with HID ≤3 mm, from the placement to prosthesis installation, the mean MBL for the coronal and apical implants were -1.53 ± 1.04 mm and -0.99 ± 0.93 mm, respectively (p=0.04). The coronal implants exhibited -1.71 ± 1.14 mm and apical implants showed -1.05 ± 0.87 mm MBL from placement to final evaluation (p=0.009). Among implants with HID ≤ 3 mm and VLD> 1 mm, MBL for the coronal (-2.03 ± 1.25 mm) and apical implants (-1.01 ± 0.84 mm) from implant placement to the last follow-up (p=0.004). Pearson correlation demonstrated a negative correlation between VLD and MBL from implant placement to the last follow-up (R2=0.29; p=0.009).

Conclusion and Clinical implications: Vertical level discrepancy between the platforms of adjacent implants was associated with significant marginal bone level changes around the coronal implant. This association was limited to implants with horizontal inter-implant distance of 3 mm or less.
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Disclosure of Interest: None Declared

Keywords: bone remodeling, marginal bone loss, retrospective study



中文翻译:

EAO-286 / OC-PIB-004 | 相邻牙种植体垂直水平差异对边缘骨丢失的影响

瓦希德·霍什卡姆1,* ; 阿扎德·塔瓦里2 ; Kian Kar 3 ; 尼玛·巴赫沙利安3 ; 霍马永·扎德4

1私人执业,埃尔帕索;2私人执业;3牙周病学,南加州大学洛杉矶分校;4 Private Practice, Woodland Hills, 美国

背景:本研究的目的是研究相邻种植体的相对垂直和水平位置对种植体周围边缘骨水平 (MBL) 改变的影响。

目的/假设:本研究中检验的零假设是相邻种植体的空间关系与种植体周围边缘骨水平变化无关。

材料和方法:检查了在两个中心接受 2 或 3 个相邻植入物且至少随访一年的患者的放射学记录。

纳入标准如下:1) 多个相邻牙种植体采用夹板或非夹板固定修复体修复 2) 在种植体植入、修复体安装和加载后至少一年时可获得具有诊断质量的 X 光片 3) 种植体具有放置在上颌或下颌后节 4) 螺钉型粗糙表面种植体,具有内部或外部连接,放置在 equicrestally、supracrestally 或 subcrestally

排除标准如下: 1) 置入新鲜牙槽窝或立即装载的种植体

2) 不同时间放置的相邻种植体 3) 悬臂延伸修复 4) 种植体植入时的任何移植程序 5) 无法辨别种植体螺纹的射线照片 6) 重度吸烟患者(每天 10 支以上香烟)

结果: 65 名患者(平均年龄 59 ± 8.9 岁),贡献了 153 颗种植体,平均随访时间为 57.2 ± 0.3 个月,符合纳入/排除标准。相邻种植体的空间关系包括水平种植体间距 (HID) 3.36 ± 1.49 和垂直水平差异 (VLD),平均值为 1.44 ± 0.86 mm。在 HID ≤3 mm 的部位,从放置到假体安装,冠状和根尖植入物的平均 MBL 分别为 -1.53​​ ± 1.04 mm 和 -0.99 ± 0.93 mm ( p = 0.04)。从放置到最终评估,冠状植入物表现出 -1.71 ± 1.14 mm,根尖植入物表现出 -1.05 ± 0.87 mm MBL(p=0.009)。在 HID ≤ 3 mm 和 VLD > 1 mm 的种植体中,从种植体植入到最后一次随访的冠状(-2.03 ± 1.25 mm)和根尖种植体(-1.01 ± 0.84 mm)的 MBL ( p = 0.004)。Pearson 相关性表明,从种植体植入到最后一次随访,VLD 和 MBL 之间呈负相关(R 2 =0.29;p =0.009)。

结论和临床意义:相邻种植体平台之间的垂直水平差异与冠状种植体周围显着的边缘骨水平变化有关。这种关联仅限于种植体水平间距为 3 毫米或更小的种植体。
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利益披露:无申报

关键词: 骨重建,边缘骨丢失,回顾性研究

更新日期:2021-12-29
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