Header

UZH-Logo

Maintenance Infos

Healing at implants installed concurrently to maxillary sinus floor elevation with Bio-Oss(®) or autologous bone grafts. A histo-morphometric study in rabbits


De Santis, Enzo; Lang, Niklaus P; Ferreira, Sabrina; Rangel Garcia, Idelmo; Caneva, Marco; Botticelli, Daniele (2017). Healing at implants installed concurrently to maxillary sinus floor elevation with Bio-Oss(®) or autologous bone grafts. A histo-morphometric study in rabbits. Clinical Oral Implants Research, 28(5):503-511.

Abstract

OBJECTIVE: To compare the healing at elevated sinus floors augmented either with deproteinized bovine bone mineral (DBBM) or autologous bone grafts and followed by immediate implant installation.
MATERIAL AND METHODS: Twelve albino New Zealand rabbits were used. Incisions were performed along the midline of the nasal dorsum. The nasal bone was exposed. A circular bony widow with a diameter of 3 mm was prepared bilaterally, and the sinus mucosa was detached. Autologous bone (AB) grafts were collected from the tibia. Similar amounts of AB or DBBM granules were placed below the sinus mucosa. An implant with a moderately rough surface was installed into the elevated sinus bilaterally. The animals were sacrificed after 7 (n = 6) or 40 days (n = 6).
RESULTS: The dimensions of the elevated sinus space at the DBBM sites were maintained, while at the AB sites, a loss of 2/3 was observed between 7 and 40 days of healing. The implants showed similar degrees of osseointegration after 7 (7.1 ± 1.7%; 9.9 ± 4.5%) and 40 days (37.8 ± 15%; 36.0 ± 11.4%) at the DBBM and AB sites, respectively. Similar amounts of newly formed mineralized bone were found in the elevated space after 7 days at the DBBM (7.8 ± 6.6%) and AB (7.2 ± 6.0%) sites while, after 40 days, a higher percentage of bone was found at AB (56.7 ± 8.8%) compared to DBBM (40.3 ± 7.5%) sites.
CONCLUSIONS: Both Bio-Oss(®) granules and autologous bone grafts contributed to the healing at implants installed immediately in elevated sinus sites in rabbits. Bio-Oss(®) maintained the dimensions, while autologous bone sites lost 2/3 of the volume between the two periods of observation.

Abstract

OBJECTIVE: To compare the healing at elevated sinus floors augmented either with deproteinized bovine bone mineral (DBBM) or autologous bone grafts and followed by immediate implant installation.
MATERIAL AND METHODS: Twelve albino New Zealand rabbits were used. Incisions were performed along the midline of the nasal dorsum. The nasal bone was exposed. A circular bony widow with a diameter of 3 mm was prepared bilaterally, and the sinus mucosa was detached. Autologous bone (AB) grafts were collected from the tibia. Similar amounts of AB or DBBM granules were placed below the sinus mucosa. An implant with a moderately rough surface was installed into the elevated sinus bilaterally. The animals were sacrificed after 7 (n = 6) or 40 days (n = 6).
RESULTS: The dimensions of the elevated sinus space at the DBBM sites were maintained, while at the AB sites, a loss of 2/3 was observed between 7 and 40 days of healing. The implants showed similar degrees of osseointegration after 7 (7.1 ± 1.7%; 9.9 ± 4.5%) and 40 days (37.8 ± 15%; 36.0 ± 11.4%) at the DBBM and AB sites, respectively. Similar amounts of newly formed mineralized bone were found in the elevated space after 7 days at the DBBM (7.8 ± 6.6%) and AB (7.2 ± 6.0%) sites while, after 40 days, a higher percentage of bone was found at AB (56.7 ± 8.8%) compared to DBBM (40.3 ± 7.5%) sites.
CONCLUSIONS: Both Bio-Oss(®) granules and autologous bone grafts contributed to the healing at implants installed immediately in elevated sinus sites in rabbits. Bio-Oss(®) maintained the dimensions, while autologous bone sites lost 2/3 of the volume between the two periods of observation.

Statistics

Altmetrics

Downloads

1 download since deposited on 08 Dec 2016
1 download since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Fixed and Removable Prosthodontics
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2017
Deposited On:08 Dec 2016 15:54
Last Modified:04 May 2017 01:01
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0905-7161
Publisher DOI:https://doi.org/10.1111/clr.12825
PubMed ID:26969193

Download