“A HISTOMORPHIC STUDY OF IMPLANT DENTISTRY ON THE ALVEOLAR SPONGIOSA OF HUMAN DRY SKULL.”
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Keywords
Alveolar spongiosa, trabecular width, marrow space, Interseptal bone, Ocular micrometer
Abstract
Alveolar bone is the part of the maxilla and mandible that supports the roots of the teeth. It is functionally divided into – alveolar bone proper and supporting bone which comprises of outer cortical plates and spongiosa.
The aim of the study was to evaluate- Trabecular width and its characteristics and shape and size of marrow spaces and their distribution throughout the alveolar bone.
The study was conducted on 150 samples derived from 12 dried human jaw bones. Each sample comsisted of interdental alveolar bone. The samples were processed for optical microscopy to evaluate the dimensional characteristics of trabecular width and marrow space. The present study revealed the trabecular width different at its coronal, middle and apical locations. It has been observed that the trabecular width decreases from the coronal zone (1.08 mm) to the apical zone (0.34 mm). The dimension of the marrow space has been seen to be different at it’s coronal, middle and apical zones. It increases from the coronal zone (0.26 mm) to the apical zone. (1.05 mm). it is interesting to note that in a particular locality, the greater the trabecular width, the lesser is the marrow space size. It is clear that the trabecular width is inversely proportional to the size of the marrow space at any location from the coronal to the apical zone.
The statistical analysis of the data reveals that for trabecular width, the average coronal reading is highest followed by the middle and apical reading and student’s ‘t’ test reveals that the differences are all highly significant (p<0.001). With respect to the size of marrow space the average apical reading is highest (1.05 mm), next to it, the middle average reading (0.49 mm) and the lowest average reading is that of the coronal zone (0.26 mm). The differences are all statistically significant (p<0.001). Since in the cononal area, the trabecular width is more, the marrow space becomes smaller. Conversely in the apical area, the trabecular width is lesser and the marrow space becomes bigger. The results of the study is helpful in determining the potential micro-anatomical factors for dental implants. This study, therefore seems to the first of it’s own kind.
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Dr. Ashish Singh
Professor Department of Oral and Maxillofacial Surgery Maharana Pratap College of Dentistry and Research centre Gwalior, Madhya Pradesh