1,721,115 research outputs found
Prevalence of white-spot lesions before and during orthodontic treatment with fixed appliances
No full textThe aim of the study was to determine the prevalence of white-spot lesions (WSLs) in patients
with fixed orthodontic appliances. The cross-sectional study sample consisted of three groups of patients:
group I, 59 patients treated orthodontically for 6 months; group II, 64 patients treated for 12 months;
group 0 (control), 68 patients examined immediately before appliance placement. All groups were treated
with a 0.022-inch slot preadjusted appliance and they wore a functional fixed appliance. The presence of
WSLs was evaluated by visual examination using the scoring system proposed by Gorelick. The groups
were evaluated for differences in the prevalence of at least one WSL using Fisher’s exact test, followed
by Bonferroni pairwise comparisons. The prevalence of WSLs by tooth type was evaluated with logistic
regression (P < 0.05). Intraobserver agreement was assessed by means of the Cohen ĸ statistical
method. There were no significant differences in the prevalence of WSLs between patients treated for 6
and 12 months (P = 0.855); however, there were significantly more WSLs in groups I and II than in group
0 (P = 0.000). No significant differences were found between girls and boys (P = 1.000). The mandibular
first molars and maxillary lateral incisors were the most affected teeth, in both the treated and untreated
groups. The study revealed significant decalcification at 6 months after orthodontic bonding. Considering
how quickly these lesions can develop and become irreversible, early diagnosis is of critical importance
Magnetic attachments for implants in complete dentures Attacchi magnetici su impianti in protesi totale.
No full textAbstract
In this research work we examine and apply to patients new types of technologies, describing advantages and disadvantages of using them. This osseointegrated implantation with magnetic prosthetic connection, allow to stabilize complete denture in patients suffering from serious atrophy
New application of osteogenic differentiation from HiPS stem cells for evaluating the osteogenic potential of nanomaterials in dentistry
No full textObjective: HiPS stem cells are commonly used for the study of medical disorders. The laboratory in which this study was conducted uses these cells for examining the treatment and cure of neurodegenerative diseases. Bone regeneration poses the greatest challenge for an oral surgeon both in terms of increased implant osseointegration and reducing bone healing times. The aim of this study was to validate the protocol in the literature to produce and then test in vitro osteoblasts with different nanomaterials to simulate bone regeneration. Method: hiPS clones (#2, #4, and #8) were differentiated into an osteoblast cell culture tested for alizarin red staining and for alkaline phosphatase testing at 14, 21 and 28 days, after the cells were plated. Results: The cells showed diffuse positivity under alizarin red staining and the alkaline phosphatase (ALP)‐test, showing small formations of calcium clusters. Conclusion: Despite the limitations of our study, it is a starting point for further protocols, laying a solid foundation for research in the field of bone regeneration through the use of stem cells
Valutazione clinica dell’efficacia di apatite neoactive suspension nella desensibilizzazione di pilastri protesici vitali.
No full textA Retrospective 2-Year Clinical Study of Immediate Prosthetic Rehabilitation of Edentulous Jaws with Four Implants and Prefabricated Bars
No full textThe purpose of this retrospective investigation was to evaluate the use of a prefabricated bar system for immediately loaded implants placed and restored according to the All-on-Four concept with up to 24-month follow-up
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