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N Perrini

Publications and source records attributed to N Perrini.

7 recordsLinked to original sources
PubMed2002

A study on the thickness of radicular dentine and cementum in anterior and premolar teeth.

AIM: This study aimed to measure the thickness of radicular dentine and cementum in incisors, canines and premolars, and to develop geometric average models. METHODOLOGY: The roots of 220 extracted human teeth were sectioned in three horizontal parallel planes and measured using an optical microscope. For each cut surface buccal, lingual, mesial, and distal thickness of the root wall was measured. Mean values of the thickness at each location of each cut surface were calculated. The observed differences in thickness by tooth type, location, and section were compared by ANOVA and Student's t-test. RESULTS: Maxillary central incisors and maxillary canines had the greatest widths. In all teeth with a single root, the wall thickness were greater on the lingual side than the buccal side. Although differences between mesial and distal thicknesses were not statistically significant. CONCLUSIONS: Wall thickness varied greatly. The lingual surfaces of roots were larger. All roots had thin walls in the apical third.

Analysis of Variance↗
PubMed1995

[Not Available].

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Dentistry↗
PubMed1994

Generalized gingival enlargement due to accumulation of amyloid-like material.

Hyaline or amyloid-like substances may be seen in several oral lesions. Some of these originate from epithelial cells and some from connective tissue components. In this study, amyloid-like material causing gingival enlargement in three patients, with eyelid involvement in two, was examined using histochemistry, immunohistochemistry and electron microscopy. These accumulations did not share the classical features of amyloid such as green birefringence under polarized light after Congo red staining. Our findings suggest that epithelial degeneration plays an important role in the pathogenesis of these amyloid-like accumulations. These substances may be the result of defective amyloidogenesis and our cases may represent an oral counterpart of ligneous conjunctivitis or colloid milium of the skin.

Adolescent↗
PubMed1991

[Morphological analysis of lower permanent incisor roots].

Using horizontal sections at various levels and subsequent examination through a stereoscopic microscope, the authors examined 144 roots from the same number of mandibular incisors, in order to determine the number of canals in the coronal third, in the medial third and in the apical third of the root. It was found that 36.1% of the sample displayed multiple root canals.

Dental Pulp Cavity↗