Histologic evaluation of the buccal and lingual bone plates in anterior dog teeth: possible influence on implant dentistry.
BACKGROUND
Recent studies in animals have shown pronounced resorption of buccal bone plate after immediate implantation. The sectioning of experimental material for histologic evaluation of the bone plates could provide valuable information about the possible effect of bone exposure in periodontal and implant surgeries.


METHODS
Twenty-four incisors were collected from dogs. After decalcification, the blocks were immersed in paraffin and bucco-lingual histologic sections were examined under light microscope. Some sections were reserved for immunohistochemical analysis.


RESULTS
The bone density, the width of the bone plates, and the percentage of vessels presented in the periodontal ligament and periosteum were analyzed in the buccal and lingual bone plates, which were divided corono-apically into thirds. The buccal bone plates showed statistically higher bone density compared to the lingual bone plates in the coronal thirds. The width of both bone plates increased from the coronal to the apical third, but all the buccal thirds were significantly thinner compared to the lingual thirds. No statistically significant differences were found between the bone plates for the percentage of area occupied by the blood vessels in the periodontal ligament or periosteum.


CONCLUSIONS
It is reasonable to conclude that the higher bone density, represented by the lower number of marrow spaces, in association with the thinner aspect of the buccal bone plates made them more fragile to absorb compared to the lingual bone plates, especially during mucoperiosteal procedures.
Department of Bucco-Maxillofacial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil. novaesjr@forp.usp.br
Arthur B
AB
Novaes
Guilherme O
GO
Macedo
Flávia A
FA
Suaid
Raquel R M
RR
Barros
Sérgio L S
SL
Souza
Adriana M M
AM
Silveira E Souza
D016301:Alveolar Bone Loss / Q000209:etiology / Q000473:pathology; D000539:Alveolar Process / Q000033:anatomy & histology* / Q000098:blood supply / Q000601:surgery; D000818:Animals; D015519:Bone Density; D016723:Bone Remodeling; D015921:Dental Implants / Q000009:adverse effects; D004285:Dogs; D007180:Incisor; D008334:Mandible; D010513:Periodontal Ligament / Q000033:anatomy & histology* / Q000098:blood supply; D014081:Tooth Extraction / Q000009:adverse effects
D015921:Dental Implants