Periimplant bone in immediately loaded titanium implants: histologic and histomorphometric evaluation in human. A report of two cases.
BACKGROUND
In recent years, several investigations have demonstrated, in clinical and histologic studies, the practicality of the use of immediate loading in implant dentistry.


OBJECTIVE
The aim of the present study was to analyze the periimplant responses to immediately loaded implants retrieved from two patients after a 6-month loading period.


METHODS
Three immediately loaded implants (two hydroxyapatite [HA] coated, one with a sandblasted surface) were retrieved from two patients after a 6-month loading period. The implants were treated to obtain thin ground sections.


RESULTS
Bone was present at the interface with all three implants. Bone-implant contact percentage was 80.6% +/- 4.7. Bone was present also in the thread concavities found at a distance from preexisting bone and in those concavities that were at the interface with the supracrestal tissues or with wide marrow spaces. No gaps or fibrous tissues were present at the interface. No inflammatory infiltrate was present at the interface. The mean of the sulcus depth in all three implants was 0.9 +/- 0.1 mm, the length of the junctional epithelium was 0.9 +/-0.05 mm, and the length of connective tissue contact was 1.1 +/-0.05 mm. CONCLUSIONS; Our results show that immediate loading of dental implants did not impede the formation of mineralized tissue at the interface, and it can probably be a viable alternative in implant dentistry.
Degidi
Marco
M
Dental School, University of Chieti, Via F. Sciucchi 63, 66100 Chieti, Italy.
Scarano
Antonio
A
Iezzi
Giovanna
G
Piattelli
Adriano
A
D000539:Alveolar Process / Q000473:pathology*; D015519:Bone Density / Q000502:physiology; D001853:Bone Marrow / Q000473:pathology; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003238:Connective Tissue / Q000473:pathology; D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D004846:Epithelial Attachment / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007568:Jaw / Q000473:pathology*; D007575:Jaw, Edentulous / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016348:Osseointegration / Q000502:physiology; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D014025:Titanium