Crestal bone response to loaded zirconia and titanium implants: a radiographic and histometric analysis in canines.,Clinical Oral Investigations

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Crestal bone response to loaded zirconia and titanium implants: a radiographic and histometric analysis in canines.
Clinical Oral Investigations ( IF 3.1 ) Pub Date : 2020-02-07 , DOI: 10.1007/s00784-020-03235-2
Corinne E Oeschger _{1,

2} , Dieter D Bosshardt ₃ , Stefan Roehling _{4,

5,

6} , Michael Gahlert _{6,

7,

8} , David L Cochran ₅ , Simone F M Janner _{1,

5}

Affiliation

Objectives

To evaluate the crestal bone response to a two-piece zirconia implant compared with a control titanium implant using periapical radiographs (PAs) and histometry.

Materials and methods

Thirty zirconia and 30 titanium implants were placed in healed posterior mandibles of five canines. Full-ceramic single-tooth restorations were cemented after 6 weeks of healing. Three observers measured the distance between the implant shoulder and the crestal bone (DIB) at placement, loading, and harvesting after 4 or 16 weeks in function. The influence of implant material and loading time on DIB as well as the inter-observer agreement were analyzed. Additionally, histometric distance between implant shoulder and most coronal bone-to-implant contact (IS-cBIC) was compared with DIB.

Results

Mean DIB values increased between 4 and 16 weeks of loading for both zirconia (from 1.66 to 2.25 mm; P < 0.0001) and titanium (from 1.81 to 1.95 mm; P = 0.06). Zirconia yielded mean IS-cBIC values of 2.18 mm and 2.48 mm (P < 0.001) and titanium 2.23 mm and 2.34 mm (P = 0.27) after 4 and 16 weeks, respectively. The raters reached an excellent intraclass correlation coefficient. PAs underestimated the bone loss on average by 0.39 mm.

Conclusions

Zirconia implants showed a greater increase of DIB during early healing and function than titanium.

Clinical relevance

Crestal peri-implant tissue dimensions may show more pronounced changes around two-piece zirconia implants during early healing. PAs may underestimate peri-implant bone loss.

中文翻译：

顶骨对负载的氧化锆和钛植入物的反应：犬的放射线照相和组织学分析。

目标

为了评估using骨对两件式氧化锆植入物与对照组钛植入物的反应，使用根尖X线片（PAs）和组织测定法。

材料和方法

将三十个氧化锆和30个钛植入物放置在五个犬牙的后牙下颌中。愈合6周后，将全瓷单齿修复体固定。三名观察者在功能放置4或16周后，在植入，装载和收获时测量了植入物肩部与牙骨（DIB）之间的距离。分析了植入物材料和加载时间对DIB的影响以及观察者之间的协议。此外，将种植体肩部和大多数冠状骨与种植体之间的接触距离（IS-cBIC）与DIB进行了比较。

结果

氧化锆（从1.66到2.25 mm；P <0.0001）和钛（从1.81到1.95 mm；P = 0.06）的平均DIB值在加载4到16周之间增加。 4周和16周后，氧化锆的平均IS-cBIC值分别为2.18 mm和2.48 mm（P <0.001）和钛2.23 mm和2.34 mm（P = 0.27）。评估者达到了极好的类内相关系数。PA将骨损失平均低估了0.39 mm。