Immediate and delayed loading of fixed dental prostheses supported by single or two splinted implants: A histomorphometric study in dogs.

Cesaretti, G; Lang, Niklaus Peter; Viganò, P; Bengazi, F; Apaza Alccayhuaman, K A; Botticelli, D (2018). Immediate and delayed loading of fixed dental prostheses supported by single or two splinted implants: A histomorphometric study in dogs. Journal of oral rehabilitation, 45(4), pp. 308-316. Blackwell Scientific Publications 10.1111/joor.12612

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To evaluate presumptive differences in osseointegration at implants supporting crowns that are physiologically loaded either immediately or 3 months after installation. All premolars and first molars were extracted bilaterally in six dogs. After 3 months of healing, three implants were installed on the premolar region and two in the molar region in one side of the mandible. Likewise, after another 3 months, five implants were installed in the contralateral side, and impressions were taken bilaterally. Within 48 hours, two single crowns were screwed bilaterally onto two implants in the premolar region, and two splinted crowns reproducing the shape of the first molar were screwed bilaterally onto the implants in the molar region. The mesial implants were used as no-loaded controls. Sacrifices were performed after 3 months, and histological analyses were performed. At the premolar sites, mineralised bone-to-implant contact (MBIC%) was 78.0 ± 4.0% and 70.9 ± 7.9% at the delayed and immediately loaded sites, respectively. This difference was statistically significant. At the control implants, MBIC% was 61.4 ± 14.7% and 63.1 ± 13.1% at the delayed and the immediately loaded sites, respectively. At the molar sites, MBIC% was 79.2 ± 10.9% and 61.1 ± 10.3% at the delayed and immediately loaded sites, respectively. Applying a delayed loading to fixed dental prostheses supported by single or two splinted implants yielded higher proportions of bone-to-implant contact (osseointegration) compared to immediately loaded implants. Moreover, both types of loading protocols yielded a higher rate of osseointegration compared to unloaded implant sites after 3 months following implant installation.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Periodontology
04 Faculty of Medicine > School of Dental Medicine > School of Dental Medicine, Periodontics Research

UniBE Contributor:

Lang, Niklaus Peter

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0305-182X

Publisher:

Blackwell Scientific Publications

Language:

English

Submitter:

Doris Burri

Date Deposited:

18 Jul 2019 14:00

Last Modified:

24 Oct 2019 21:03

Publisher DOI:

10.1111/joor.12612

PubMed ID:

29385632

Uncontrolled Keywords:

animal experimentation dental occlusion histology immediate implant loading implant-supported dental prosthesis single-tooth implant

BORIS DOI:

10.7892/boris.125353

URI:

https://boris.unibe.ch/id/eprint/125353

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