Premium
Histologic and histomorphometric analysis of three types of dental implants following 18 months of occlusal loading: a preliminary study in baboons
Author(s) -
Watzak Georg,
Zechner Werner,
Ulm Christian,
Tangl Stefan,
Tepper Gabor,
Watzek Georg
Publication year - 2005
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2005.01155.x
Subject(s) - implant , dentistry , maxilla , osseointegration , mandible (arthropod mouthpart) , materials science , medicine , orthodontics , surgery , botany , biology , genus
The purpose of this study was to determine the percentage of ‘bone area’ (BA) and ‘bone‐to‐implant contact’ (BIC) of dental implants with different designs and surface modifications after functional loading. Three types of dental implants with fixed partial dentures were placed in the posterior jaws of adult baboons (commercially pure titanium (CpTi) screws, grit‐blasted acid‐etched (GBAE) screws, and titanium plasma‐sprayed (TPS) cylinders), three of the same design per quadrant. After 18 months of functional loading, all implants investigated were successfully integrated in the jawbone and histologic and histomorphometric analyses were carried out. Statistical evaluation was performed with a mixed model with data given as least‐square means and standard errors of the mean (SEM). Histologically, direct BIC without connective tissue interposed between implant surfaces and peri‐implant bone was seen. Analysis of BA within 1 mm around implants showed significant differences between CpTi (50.5%) and TPS (39.7%) (±2.72 SEM; P <0.01) in the maxilla. To account for the different implant designs, absolute BIC was calculated. Significant differences were found between CpTi (23.9 mm) and TPS (15.1 mm) and between GBAE (27.2 mm) and TPS (15.1 mm) (±1.05 SEM; P <0.01) in the maxilla and between GBAE (26.5 mm) and TPS (19.6 mm) (±1.42 SEM; P <0.01) in the mandible. Overall, the data indicate that, in the maxilla, screw‐shaped implants showed more absolute BIC than cylindrical implants, which had less maxillary than mandibular absolute BIC after 18 months of functional loading.