The aim of the present study was to compare the course of osseointegration speculating the bone-to-implant contact (BIC) rate, the osteocytes density (OD) and the collagen fiber orientation (CFO) in one implant retrieved from mandible and in one retrieved from maxilla. A SLA (Sand-blasted, Large grit, Acid-etched) surface implant of 3.3 mm x 15 mm was placed in a male 53 years old in the anterior region of the mandible bone (4.1) and an implant Dental Implant Line (sand blasted surface) of 3.75 x 16 mm was placed in the anterior region of the maxillary bone (2.1) in a female of 50 years old after a bone augmentation procedure. These implants were processed for histology. The specimens were analyzed under the confocal scanning laser microscope (CSLM) and brightfield light microscope (LM) equipped with circularly polarized light (CPL). The BIC rate of the implant retrieved after 23 months was 76.7± 4.9 (mean ±SD) while for the implant retrieved after 13 years it was 68.7 ± 3.7. The histomorphometric evaluation showed a predominantly woven bone around the 23 months implant, while around the 13 years implant the bone was manly lamellar. The transverse CFO (mean ±SD) under the lower flank of the thread near the tread tip was 55.2 ± 4.8 x 104 pixel for the 23 months specimen and 20.4 ± 3.5 x 104 for the 13 years specimen (P<.05). The longitudinal CFO (mean ±SD) in the inter-threads region was 65.6 ± 6.5 x 104 pixel for the 23 months specimen and 21.4 ± 3.0 x 104 for the 13 years specimen (P<.05). In the 23 months specimen much more longitudinal CFO were present in the inter-threads area, while under the lower flank of the thread there were much more transverse CFO. In the 13 years specimens the difference in transverse and longitudinal CFO appeared to be not statistically significant due to the lamellar nature of the peri-implant bone which presents alternating CFO in adjacent bone lamellae. The OD (mean ±SD) was 205 ± 45 in the specimen after 23 months and 130 ± 34 in the specimen after 13 years (P<.001).
Comparison between implant retrieved from human mandible and maxilla: an histomorphic-metric evaluation
T. Traini;
2011-01-01
Abstract
The aim of the present study was to compare the course of osseointegration speculating the bone-to-implant contact (BIC) rate, the osteocytes density (OD) and the collagen fiber orientation (CFO) in one implant retrieved from mandible and in one retrieved from maxilla. A SLA (Sand-blasted, Large grit, Acid-etched) surface implant of 3.3 mm x 15 mm was placed in a male 53 years old in the anterior region of the mandible bone (4.1) and an implant Dental Implant Line (sand blasted surface) of 3.75 x 16 mm was placed in the anterior region of the maxillary bone (2.1) in a female of 50 years old after a bone augmentation procedure. These implants were processed for histology. The specimens were analyzed under the confocal scanning laser microscope (CSLM) and brightfield light microscope (LM) equipped with circularly polarized light (CPL). The BIC rate of the implant retrieved after 23 months was 76.7± 4.9 (mean ±SD) while for the implant retrieved after 13 years it was 68.7 ± 3.7. The histomorphometric evaluation showed a predominantly woven bone around the 23 months implant, while around the 13 years implant the bone was manly lamellar. The transverse CFO (mean ±SD) under the lower flank of the thread near the tread tip was 55.2 ± 4.8 x 104 pixel for the 23 months specimen and 20.4 ± 3.5 x 104 for the 13 years specimen (P<.05). The longitudinal CFO (mean ±SD) in the inter-threads region was 65.6 ± 6.5 x 104 pixel for the 23 months specimen and 21.4 ± 3.0 x 104 for the 13 years specimen (P<.05). In the 23 months specimen much more longitudinal CFO were present in the inter-threads area, while under the lower flank of the thread there were much more transverse CFO. In the 13 years specimens the difference in transverse and longitudinal CFO appeared to be not statistically significant due to the lamellar nature of the peri-implant bone which presents alternating CFO in adjacent bone lamellae. The OD (mean ±SD) was 205 ± 45 in the specimen after 23 months and 130 ± 34 in the specimen after 13 years (P<.001).File | Dimensione | Formato | |
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