1,721,049 research outputs found
Impression Heater. Effectiveness of the thermal accelerator of dental impressions
No full textThe success in acquiring a precision impression in the dental field is a compromise between the processing time and the setting time of the impression material. A device called "Impression Heater" (EU application n ° EP20186042.6) has recently been patented, which consists of a self-heating disposable adhesive patch with an exothermic chemical reaction to be placed on the dental impression tray. The aim of the study was to evaluate the effectiveness of a thermal impression accelerator in reducing the setting time of different elastomers
Lo stato di salute parodontale nella popolazione del Parco Genetico del Friuli Venezia Giulia
No full textLa malattia parodontale è una patologia infiammatoria cronica dei tessuti di sostegno degli elementi dentari. Colpisce circa il 60% della popolazione italiana. Tra questi, il 10% presenta una malattia parodontale aggressiva che se non tempestivamente diagnosticata e trattata determina un’edentulia precoce.
Questa patologia ha un’origine multifattoriale. La causa principale è da ricercare in alcune specie batteriche che in associazione a stili di vita a rischio come, fumo, diabete e stress, o ad una predisposizione genetica, possono influenzare l’insorgenza ed il decorso della patologia.
Una condizione di salute dei tessuti parodontali (Fig. 1) può essere alterata da uno stato infiammatorio iniziale delle gengive (Fig. 2). Se non trattato il quadro clinico può peggiorare con il riassorbimento progressivo dell’osso fino alla conseguente perdita dell’elemento dentario (Fig. 3)
Considering the Value of 3D Cultures for Enhancing the Understanding of Adhesion, Proliferation, and Osteogenesis on Titanium Dental Implants
Full text linkBackground: Individuals with pathologic conditions and restorative deficiencies might benefit from a combinatorial approach encompassing stem cells and dental implants; however, due to the various surface textures and coatings, the influence of titanium dental implants on cells exhibits extensive, wide variations. Three-dimensional (3D) cultures of stem cells on whole dental implants are superior in testing implant properties and were used to examine their capabilities thoroughly.
Materials and methods: The surface micro-topography of five titanium dental implants manufactured by sandblasting with titanium, aluminum, corundum, or laser sintered and laser machined was compared in this study. After characterization, including particle size distribution and roughness, the adhesion, proliferation, and viability of adipose-derived stem cells (ADSCs) cultured on the whole-body implants were tested at three time points (one to seven days). Finally, the capacity of the implant to induce ADSCs' spontaneous osteoblastic differentiation was examined at the same time points, assessing the gene expression of collagen type 1 (coll-I), osteonectin (osn), alkaline phosphatase (alp), and osteocalcin (osc).
Results: Laser-treated (Laser Mach and Laser Sint) implants exhibited the highest adhesion degree; however, limited proliferation was observed, except for Laser Sint implants, while viability differences were seen throughout the three time points, except for Ti Blast implants. Sandblasted surfaces (Al Blast, Cor Blast, and Ti Blast) outpaced the laser-treated ones, inducing higher amounts of coll-I, osn, and alp, but not osc. Among the sandblasted surfaces, Ti Blast showed moderate roughness and the highest superficial texture density, favoring the most significant spontaneous differentiation relative to all the other implant surfaces.
Conclusions: The results indicate that 3D cultures of stem cells on whole-body titanium dental implants is a practical and physiologically appropriate way to test the biological characteristics of the implants, revealing peculiar differences in ADSCs' adhesion, proliferation, and activity toward osteogenic commitment in the absence of specific osteoinductive cues. In addition, the 3D method would allow researchers to test various implant surfaces more thoroughly. Integrating with preconditioned stem cells would inspire a more substantial combinatorial approach to promote a quicker recovery for patients with restorative impairments
Randomized prospective clinical trial in surgical treatment of class II mandibular furcation
No full textN/
Relazione tra salute orale e aprassia costruttiva in pazienti anziani ospedalizzati: studio osservazionale. Relationship between oral health and constructional apraxia among hospitalized elderly patients: an observational study
No full textRIASSUNTO
Scopo del lavoro
Lo scopo è stato valutare l’impatto dell’aprassia costruttiva sulla salute del cavo orale e sul livello nutrizionale in soggetti anziani ospedalizzati.
Materiali e metodi
È stato selezionato un campione di 176 anziani ospedalizzati di età superiore ai 65 anni (età media 84,3±6,8 anni) divisi in due gruppi: G0 pazienti affetti da aprassia (n=91); G1 pazienti sani (n=78). Per ogni soggetto è stato valutato: esame obiettivo orale, Decayed Missing Filled Teeth (DMFT), Indice di Placca (IP), Periodontal Screening and Recording (PSR), valutazione di un’eventuale riabilitazione protesica distinta tra arcata superiore e arcata inferiore. Inoltre è stato compilato un questionario con 10 domande sulle abitudini di igiene orale. Sono stati raccolti gli indici Mini Mental State Examination (MMSE) che conteneva la
valutazione dell’aprassia costruttiva e il Mini Nutritional Assessment (MNA) per la valutazione dello stato nutrizionale.
Risultati
Non sono emerse differenze significative per il DMFT tra i due gruppi. I soggetti di età superiore ai 75 anni con aprassia hanno meno elementi dentari presenti in arcata rispetto a quelli sani (denti mancanti G0 = 21,07±8,8, G1 = 17,70±9,2) (p<0,05). Il 94% dei soggetti affetti da aprassia non esegue una specifica tecnica di spazzolamento manuale. Il 15 % dei soggetti con aprassia costruttiva presentano un cattivo stato nutrizionale rispetto all’8% dei soggetti sani (p<0,05).
Conclusioni
La diagnosi di aprassia deve attivare l’assistenza nei confronti dell’anziano nell’igiene quotidiana e nell’alimentazione, coinvolgendo sia i familiari che il personale ausiliario. La figura dell’igienista dentale attivando programmi personalizzati di igiene orale risulta fondamentale al mantenimento di un buono stato di
salute nell’anziano
SURGICAL TREATMENT OF CLASS II FURCATION DEFECTS: ARE THERE NEW REGENERATIVE TECHNIQUES?
No full textAim: complex anatomical features and limited accessibility to the furcation area make the periodontal management of multi- rooted teeth challenging. The aim of this study is to investiga- te a new surgical approach in periodontal regeneration of class II furcation defects.
Methods: 20 subjects diagnosed with a stage III grade B pe- riodontitis with class II furcation defects, homogenous for de- fect and furcation anatomical characteristics, were selected. The test group (n = 10) underwent a new surgical approach, consisting in Piezosurgical Roof Furcation Contouring (PRFC), grafting and Coronally Advanced Flap (CAF). The control group (n = 10) was treated with Open Flap Debridement (OFD). Clinical and radiologic variables, such as bleeding on probing (BoP), probing depth (PPD), vertical and horizontal bone level,
gingival recession, root trunk length, radicular separation, and furcation perimeter, were evaluated at baseline, 180 days and 1 year after surgery (FU).
Results: in the test group a CAL gain (6.00 ± 1.15 vs 3.00 ± 0.66 mm), horizontal probing attachment level gain (6.00 ± 1.56 vs 3.10 ± 0.73 mm) and PPD reduction (4.20 ± 0.92 vs 2.70 ± 0.48 mm) were observed, comparing baseline to FU da- ta. Test group showed greater radiographic reduction of furca- tion perimeter (5.42 ± 1.38 vs 2.67 ± 0.98 mm).
Conclusions: this new surgical technique has shown greater clinical improvement at FU compared to the baseline. Regene- rative surgery carried out with PRFC and CAF led to better cli- nical outcome compared to the control group, with better clo- sure and healing of the class II furcation defects
In vitro comparative evaluation of piezoelectric and magnetostrictive ultrasonic instrumentation in the furcation area
No full textBackground and Aim: Non-surgical periodontal therapy plays a key role in the management of elements suffering furcation involvement. This study has the objective to compare the effectiveness between piezoelectric and magnetostrictive tools and the various tips in an arti- ficial model of multiradicular tooth.
Methods: A plastic tooth, which perfectly mimics a first upper molar, was inserted into an experimental model. This model consisting of a container with silicone material inside, with the tooth covered from the apex to 2 mm from furcation roof configured to simulate a grade two furcation defect. The treating root area was covered with specific material to simulate the presence of calculus. Pictures were taken before and after instrumentation. The experimental procedure con- sists of ultrasonic roots cleaning in four groups (piezoelectric straight- tip, piezoelectric curved-tip, magnetostrictive straight-tip, magneto- strictive curved-tip) for a standardised time. For the vestibular, distal and medial surfaces 3000 and 1500 for the palatal surface. The instru- mentation operation was repeated 15 times for each group. The anal- ysis of the amount of calculus surface before and after treatment was performed by the analysis of the pictures using CAD software. Results: The validity of piezoelectric and magnetostrictive instrumen- tation in cleaning root surfaces is evident for both. All root surfaces covered were compared before and after instrumentation and were always statistically significant (p ≤ 0.001). It was possible to compare the piezoelectric and magnetostrictive instrumentation with the straight tips and the curved tips, and establish the best performance. The magnetostrictive instrumentation, in particular with the curved tip, reports significant values (p < 0.005).
Conclusions: With the limitations of the preliminary in vitro study, we can conclude that modern ultrasonic instrumentation, both piezoelectric and magnetostrictive, is an excellent tool for the maintenance of multi- rooted teeth. Particularly the promising results of magnetostrictive ultra- sonic scaler with curved tips will be validated with in vivo studies
LEVELS OF MYELOPEROXIDASE AND CALPROTECTIN IN CREVICULAR FLUID AT DIFFERENT PROBING DEPTHS.
No full textObjectives: Calprotectin (CalP) and myeloperoxidase (MPO) are biochemical markers in the gingival crevicular fluid (GCF). Their increased concentration indicates the onset of an inflammatory process. The aim of this study was to valuate the correlation between the levels of calprotectin and myeloperoxidase detected in the crevicular fluid (GCF) at different probing depth (PPD).
Materials and methods:
Results:
Conclusions: the results of this study indicated that the concentration of calprotectin and myeloperoxidase in the crevicular fluid may be considered reliable qualitative markers of inflammation status (presence/absence of inflammations). The calprotectin is produced not only by neutrophils but also by other cells that can alter the dosage in periodontal pockets. The concentration of myeloperoxidase seems significantly related to the increased presence of neutrophils into the deepest pockets
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