2,919 research outputs found
Dispositivo per la decontaminazione di circuiti idrici di ambulatori medici, odontoiatrici ed ospedalieri
No full text
Variation of Efficacy of Filtering Face Pieces Respirators over Time in a Dental Setting: A Pilot Study
No full textSince aerosol continuously persists in dental settings, where different procedures and patients come in succession, the use of oronasal masks is highly recommended. Among them, respirators known as Filtering Face Pieces (FFP) show a protective superiority compared to surgical masks. Even concerning respirators classified as non-reusable, it is not known how many hours of use are necessary to compromise their filtering capacity. The aim of this study is to investigate the variations of filtering capacity of an FFP2 respirator over time, in order to safely optimize the timing of its use. Five respirators were worn by the same operator during clinical activity for different usage times (8, 16, 24, 32, 40 h), and one respirator was kept unused. All respirators underwent a bacterial filtration efficacy (BFE) test. T-test for paired data with Bootstrap technique and Wilcoxon test for paired data compared BFE values of the five tested FFP2s respectively at each time, and the areas with the corresponding values of the control respirator (FFp2-F). A generalized linear mixed effect model (GLM) was applied considering type of respirator and time as fixed effects and intercept as random effect. No significant statistical differences were present in the BFE of each time. Data obtained by the present study highlight the important ability of FFP2s to maintain their BFE over time, suggesting a long lasting protective function
The connective tissue graft in the surgical treatment of epulis: a clinical case
No full textOBJECTIVES
Epulis is an asymptomatic lesion and its election treatment consists in the surgical excision that often produces important esthetic and functional alterations of the gingival complex. The purpose of this case report is to describe an alternative surgical approach to remove an epulis while preserving and improving the aesthetics of the much-gingival complex.
MATERIALS AND METHODS
A 29-years-old patient was referred for the evaluation of a hyper plastic gingival lesion localized on the buccal aspect of the upper central incisors. The histologic diagnosis was of pyogenic granuloma. After initial periodontal
therapy and labial frenectomy, the patient underwent surgical treatment. A sub-epithelial connective tissue graft was interposed between a full-thickness muco-periosteal flap and the recipient bed, preserving the lesion.
RESULTS AND CONCLUSIONS
No post surgical complications were detected. More than a one year after surgery the patient exhibited no epulis with a stable gingival situation and no recurrence was detected. This technique seems to be able to remove the lesion and allow a thickness increase of the connective tissue underlying the mass, preventing post surgical gingival recessions and retraction scars and avoiding a second surgical reconstructive procedure
Bioburden Variation of Filtering Face Piece Respirators over Time: A Preliminary Study
No full textBackground: The microbial contamination of a respirator can be evaluated through a count of the number of bacteria living on a non-sterilized surface (bioburden). This preliminary study investigated the external contamination of two different FFP2s over time by studying the bioburden values in increasing exposure times. Methods: FFP2 respirators of two different brands were used during routine clinical settings and examined through the bioburden test; for each brand, three devices were tested at 8, 16, and 30 h. Results: No significant differences were observed between mask brands (p = 0.113). There were only significant CFU differences between each mask and its control (p = 0.027 and p = 0.004). Conclusions: Both brands of respirators were found to be contaminated and this contamination increased with the increase in exposure time. Further studies are needed to investigate the exact amount of contamination that could be considered acceptable before discarding each used mask
Assessment of C-Reactive Protein Levels in Periodontal Patients Using a Standard Laboratory Procedure
No full textAbstract: Background: the aims of the randomized clinical trial were (i) to verify the association between periodontal disease and C-reactive protein (CRP) and (ii) to evaluate a possible reduction of serum CRP levels after non-surgical periodontal treatment.
Methods: Thirty-two subjects, 18 affected by chronic periodontitis, and 14 periodontally healthy patients, aged between 21 and 65 (41± 13) were included. Clinical and radiographic examinations were used for each patient to obtain three dental indices that were used to evaluate severity of periodontal disease and changes after treatment. Periodontal patients were randomly assigned to one of two groups for different treatments: special oral hygiene instructions alone or in combination with scaling and root planing. Blood samples were taken for measurement of CRP levels and eritrosedimentation rate before and after treatment.
Results: a reduction of clinical index CPSS was observed for both groups of periodontal patients after treatment but there were no statistically significant differences for CRP and ESR at baseline and between baseline and reexamination. Non statistically significant differences of CRP values between periodontal patients and healthy controls were found.
Conclusions: CRP values don’t seem to change after non-surgical treatment of periodontitis, even in presence of a reduction of clinical indices
Reconstruction of atrophied posterior mandibles with inlay technique and allograft block: histological case reports
No full textBackground: Implant placement may be challenging in areas with limited alveolar bone height, therefore augmentation procedures before implants placement become mandatory. Several treatment modalities have been developed for bone incrementation, and it has been reported that the number of complications and failures associated with the various techniques remain high for vertical bone augmentation. The inlay bone graft technique has been recently applied in the posterior mandible with remarkable results in terms of vertical bone augmentation. In the literature there are no strong evidences in relation to the use of allografts
in the inlay technique since they have been previously proposed only as onlay or veneers.
Aim/Hypothesis: In the present case series we describe the histological appearances and histomorphometric evaluation of the regenerated areas of five patients, after two/three months from the inlay augmentation procedure.
Material and Methods: Five subjects with severe atrophy of the posterior lower maxilla requiring bone reconstruction before implants placement were treated with an inlay procedure. At cone beam computed tomography (CBCT) the preoperative mean residual bone height above the mandibular canal was ≤ 7 mm, insufficient to place dental implants with adequate length. The inlay procedure provided the use of an allograft block. Three piezosurgical inserts were used to create a horizontal osteotomy at approximately 2–3 mm above the mandibular canal and two oblique cuts. An allograft bone block was then fitted between the
cranial osteotomized segment and the mandibular basal bone. A titanium miniplate was fixed with miniscrews. Two months after the inlay procedure, presence of adequate bone height was verified through CBCT scan and dental implants were placed.
During tunnel preparation for implants placement, a bone core biopsy was harvested and processed for histological and histomorphometric evaluations.
Results: Histological appearance of the regenerated bone areas was characterized by the presence of newly formed bone and large marrow spaces showing intense cellular activity but also features of mature bone, with well-organized lamellae and numerous osteocytes, revealing connection between the grafted material and the preexisting basal bone. High magnification views revealed the presence of lines of osteoblasts depositing the newly formed bone and this bone in contact with the allograft.
Conclusions and Clinical Implications: When treating severe atrophy of the posterior mandible, the use of allografts can be considered a suitable material for bone regeneration in the inlay grafting procedure in atrophic posterior mandibles, since it seems to permit implant rehabilitation after only two months from the grafting procedure. According to the preliminary results, this material represents a good clinical alternative to autologous and inorganic bovine bone
Lembo singolo posizionato coronalmente in chirurgia parodontale ricostruttiva
No full textIl contributo ha l'obiettivo di mostrare, attraverso l'analisi critica di due casi clinici, una nuova tecnica chirurgica per il trattamento dei difetti infraossei parodontali; tecnica innovativa in quanto unisce e sovrappone le caratteristiche della chirurgia ricostruttiva a quella muco-gengivale. Le peculiarità del lembo singolo posizionato coronalmente (CP-SFA) sono quelle di poter scollare un lembo da un solo versante e di utilizzare un ancoraggio coronale stabile grazie alle papille disepitelizzate. I vantaggi derivanti da questa tecnica chirurgica sono il miglioramento dell'estetica parodontale, grazie alla limitazione della contrazione post-chirurgica, e un minor disagio postoperatorio da parte del paziente, grazie alla riduzione dell'area chirurgica. Questo tecnicismo può essere utilizzato quando l'estensione del o dei difetti infraossei sia confinata su di un unico versante, quando è presente un'area interprossimale integra adiacente a ogni difetto e quando la visibilità permette un'adeguata detersione del difetto e della superficie radicolare interessata. Nonostante gli ottimi esiti preliminari qui illustrati solamente un'ulteriore e rigorosa analisi scientifica potrà validare la tecnica proposta
Orthodontic Extraction: Riskless Extraction of Impacted Lower Third Molars Close to the Mandibular Canal
No full textPurpose
The study purpose was to describe an orthodontic approach to move the
third molar’s roots, which are radiografically demonstrated to be close to
the mandibular canal, away from the neuro-vascular unit in order to
perform riskless extractions.
Materials and Methods
The authors described the different phases of this approach:
Phase 0: Assessment of surgical risks. A topographic diagnosis is made
first through a panoramic radiograph and then, if there is a suspected
contact between root and mandibular canal, through a CT scan. If the
proximity is confirmed, the orthodontic extraction will be started by:
Phase 1: Creation of the orthodontic anchorage.
Phase 2: Surgical exposure of the third molar crown and bracket bonding
to the occlusal surface.
Phase 3: Orthodontic extrusion of the third molar. A cantilever is anchored
to the first molar to produce the extrusive forces.
Phase 4: Radiographic assessment of the extrusion level. A new
radiological check is requested to confirm the tooth movement.
Phase 5: Third molar extraction.
Results
This therapeutic approach makes extraction of impacted lower third molar
easier and quicker, with less post-operative discomfort, without risk of
paresthesia or mandibular fracture and with periodontal advantages. This
technique allows extraction of lower third molars otherwise impossible for
the high risk of complications.
Conclusion
The orthodontic-surgical approach to the high-risk extraction of impacted
lower third molar has proved to be a technique quite simple for the doctor
and minimally traumatizing for the patient. It is a prudent, safe and
biologically more conservative therapeutic choice
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