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

Oeschger, Corinne E.; Bosshardt, Dieter D.; Roehling, Stefan; Gahlert, Michael; Cochran, David L.; Janner, Simone F. M. (2020). Crestal bone response to loaded zirconia and titanium implants: a radiographic and histometric analysis in canines. Clinical oral investigations, 24(10), pp. 3609-3617. Springer-Verlag 10.1007/s00784-020-03235-2

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Oral Surgery and Stomatology
04 Faculty of Medicine > School of Dental Medicine > School of Dental Medicine, Orthodontic Research

UniBE Contributor:

Oeschger-Unold, Corinne Evelyne; Bosshardt, Dieter and Janner, Simone

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1432-6981

Publisher:

Springer-Verlag

Language:

English

Submitter:

Caroline Balz

Date Deposited:

03 Apr 2020 15:39

Last Modified:

20 Sep 2020 01:31

Publisher DOI:

10.1007/s00784-020-03235-2

PubMed ID:

32034546

Uncontrolled Keywords:

Crestal bone Dental implants Osseointegration Radiographic analysis Zirconia implants

BORIS DOI:

10.7892/boris.142339

URI:

https://boris.unibe.ch/id/eprint/142339

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