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-Histological analysis of the gingival connective tissue: intense inflammatory infiltrate was observed in the gingival lamina propria (ob. 40×).
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Premature exfoliation of primary or permanent teeth in children or adolescents is extremely rare and it can be a manifestation of an underlying systemic disease. This study aims to present the histological aspects associated with early tooth loss in a case of periodontal disease developed without local inflammation and with minimal periodontal pock...
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Over the last decades, scanning electron microscopy (SEM) proved to be invaluable for ultrastructural investigation, allowing imaging of the overall appearance and/or specific features of oral biofilms, e.g., microbial colonies and individual cells, glycocalyx, the presence of inorganic products. The aim of this study was the observation and evalua...
Citations
... Abnormal cementum results in abnormal adhesion of teeth to the surrounding bone and provides an opportunity for invasion of pathogenic microorganisms. It may also be responsible for the localization of lesions [8] . ...
The purpose of this study was to evaluate the microanalysis of various elements, and assess the surface characteristics of aggressive periodontally diseased roots in comparison to sound root surface. Fifty teeth were collected: 25 from patients with aggressive periodontitis, and 25 teeth from healthy patients. Measurements of probing depth and clinical attachment loss were taken prior to extractions. Healthy and diseased root cementum were evaluated by scanning electron microscopy and energy dispersive X-ray spectroscopy. The collected data were statistically evaluated using t-test. The level of significance was set at p < 0.001. The results of this study showed a significant decrease in the calcium and phosphate contents along the entire root cementum of the aggressive periodontitis and a significant increase in the magnesium and sulphur of the same root in comparison to the control group. In addition, there were remarkable destructions of cementum, crack lines and deep cavities reaching to the underlying dentin. In conclusion, the alteration in cementum structures and composition due to aggressive periodontitis might have an important implication on periodontal therapy. The influence of alteration of cementum.
... Cementum deposition is necessary for maintenance of periodontal health and defective cementum formation may lead to the development of periodontal pockets [3]. Abnormal cementum results in abnormal adhesion of teeth to the surrounding bone and provides an opportunity for invasion of pathogenic microorganisms [4]. It may also be responsible for the localization of lesion [5]. ...
... Thus, cementum structure may be the major determinant of susceptibility to microbial invasion and formation of periodontal pockets. Root surfaces of teeth extracted for LAP have been found to have hypoplastic or aplastic cementum [1,4,6]. Considering all the above, a question arises that whether the abnormal structure of cementum is responsible for the odd pattern and extremely rapid pace of spongy bone destruction in LAP. ...
Objectives:
The aim of this study was to determine the cementum thickness in the first molars of patients with localized aggressive periodontitis (LAP) compared to healthy individuals.
Materials and methods:
This case-control study compared eight first molar teeth affected by LAP with eight third molar teeth of healthy individuals. The teeth were disinfected by immersion in 10% buffered formalin solution for three days and were then sectioned. External mesial root surfaces (middle one-third) were evaluated under a stereomicroscope by a blinded pathologist to determine the mean thickness of cementum. SPSS software (version 16.0) and t-test were used for statistical analysis.
Results:
Histological examination revealed a significant difference between the two groups in terms of the amount of cementogenesis (P<0.001) .The thickness of cementum was higher in the control group (105.16±11.5 μm) than in LAP patients (86.44±7.3 μm).
Conclusion:
This study demonstrated the presence of cementum hypoplasia in mesial root surfaces of first molars affected by LAP.
... The morphology, design and dimensions of the pontic can be a local risk factor for root decay and periodontal disease. Periodontal disease can occur even in cases of healthy individuals [5]. The clinical signs are usually bleeding gums and bad breath. ...
Introduction:
In absence of treatment, old single edentulous spaces are subjected to progressively decrease in length due to tilting and rotation of the teeth situated mesial and distal. Lately when these spaces are prosthetically restored with a bridge and these teeth are becoming abutments, sanitizing of the prosthetic restoration is achieved with difficulty, the space between the pontic and the gingival surface becoming an area rich in pathogens that can cause various complications on the abutments.
Aim:
Considering these aspects, in this study we wanted to highlight the presence and the types of the microorganisms that can be found under the pontic even in an ideal situation, selecting only young adult patients with a good oral hygiene and only with metal-ceramic bridges.
Materials and methods:
Determination of microorganisms was achieved by growing on BD Columbia Agar with 5% sheep blood. Incubation was done in anaerobe condition using GENbag system produced by BioMérieux Company.
Results:
The microorganisms that we determined were Streptococcus mutans, S. mitis, S. oralis, Gram-negative bacilli (Bacteroides ovatus, B. thetaiotaomicron) and Gram-positive bacilli (Bifidobacterium spp., Actinomyces israelii, Clostridium butyricum / beijerinckii) with relevance in the carious and periodontal disease.
Conclusions:
In cases of single unit bridges with very narrow pontics, even in patients with a very good oral hygiene and metal-ceramic restorations, we can still find micro-organisms that can potentially generate decay or periodontal disease on the abutments, located in the gingival area underneath these pontics. These bacteria can have negative implications on the long-term prognosis of prosthetic restorations.
