A New System for Choosing the Form and Size of Complete Denture Anterior Teeth

Introduction: In the absence of pre-extraction records, the choice of the size an form of anterior complete denture teeth can be extremely subjective. Several clinical and statistical parameters are usually used for choosing the correct size and form of the complete denture anterior teeth. Clinical Innovation: The technique consists of a system that allows the dentist to choose and, if necessary, easily change the dental mold during maxillomandibular recording session. The unique feature of the system is that six teeth of each mold are represented by veneers, which are connected to each other on the lingual surface by a fiber that allows each veneer some degree of movement. Discussion: This…

Stabilità cromatica di resine per protesi fissa provvisoria sottoposte a immersione in soluzioni pigmentanti.

Retention strength of ball-attachment titanium post for removable partial denture or overdenture

Aim: To evaluate the retention of an endodontic titanium post with a spherical head for removable partial denture or overdenture attachment according to surface treatment type. Methods: Sixty healthy single-rooted teeth, sectioned at the enamel/cementum junction, were treated endodontically and steadily fixed in the embedding acrylic resin. The titanium posts were subdivided into four groups: control, no surface treatment (Ctrl); posts with macro-retentive grooves (MR); air abrasion of the post surface (AB); and posts with macro-retentive grooves and air abrasion of the post surface (MR+AB). The posts were luted in the root canal using self-adhesive dual resin cement. Pull-out testing was p…

Gingival displacement using diode laser or retraction cords: A comparative clinical study.

PURPOSE: To compare two systems used for conditioning the gingival sulcus and exposing the finish line before the final impression for a fixed denture: retraction cords and diode laser. METHODS: All subjects participating in the study had healthy gingival and periodontal status before intervention for fixed prosthesis. 74 abutments for complete crown restoration were randomly divided into two groups for displacing the gingival sulcus before the final impression: gingival retraction cords (RC) and diode laser (DL). The height of the clinical crowns was measured by a blinded examiner in three points of the buccal surface (mesial, midline and distal) at four different times: after tooth prepar…

Resistenza alla frattura di quattro materiali per protesi fissa provvisoria: valutazione comparativa in vitro.

Scopo del presente lavoro è stato quello di analizzare la resistenza alla frattura di quattro resine del commercio (Jet Kit, Duralay, Protemp 3 e Systempt C&B), usate per la fabbricazione di protesi parziali provvisorie fisse. Sono stati realizzati venti provini sperimentali di dimensioni standardizzate seguendo le istruzioni dei fabbricanti, suddivisi in quattro gruppi, uno per ciascuno dei quattro materiali testati. Cinque provini di ogni materiale sono stati inseriti in una macchina tipo T.E.M.A, bloccati tra due bracci, uno superiore ed uno inferiore, attraverso un sistema simile a quello di una morsa. La resistenza determinata dai provini sulla trazione esplicata dalla velocità di allo…

Approccio clinico ai nuovi portaimpronta monouso.

Fatigue resistance of fiber post and cement/build-up materials.

Objectives:The purpose of this study was to evaluate the fatigue resistance to cycling loading of teeth restored with fiber post and different build-up systems. Methods: Forty human, sound single-rooted teeth were selected and stored in 0.02% thymol solution. The crowns were removed by cutting the teeth at the cement-enamel junction, thereafter endodontic treatment was performed using the vertical condensation technique. The roots were partially embedded in epoxy resin and randomly assigned to four groups. The specimens were restored with the same type of quartz fiber posts (DT Light Post, RTD, Grenoble, France), but different cements and build-up systems were used: 1)All-Bond2+C&B Cement+B…

Prosthetic rehabilitation of a young patient affected by Ectodermal Dysplasia with the new Eclipse Resin System

Ectodermal dysplasia is a genetic disease caused by incorrect development of the epidermis and cutaneous adnexa (for example hair, nails and sweat glands). It is often associated with skeletal and dental development anomalies. The main clinical manifestations of these syndromes are hypotrichosis, hypohydrosis and hypodontia or anodontia. Polymethyl methacrylate (PMMA) is still the most frequently used material in denture bases, but it can lead to irritation, inflammation and allergic reactions in the oral mucosa, due to the release of residual monomers. This clinical report describes a case of Hypohydrotic Ectodermal Dysplasia, rehabilitated with removable dentures made with a new monomer-f…

Cutting efficency of a new diamond bur for tooth preparation

Objectives: The aim of this study is to compare the cutting efficiency of a recently introduced diamond bur (314.S-6878.016, Komet Brasseler) for tooth preparation with its conventional variant (314.6878.016). Both burs have the same diameter, profile and diamond grains (160µm), but the 6878 have a polygonal section at the cutting portion level; this is claimed to have a percussion effect which can improve the hard tissue removal. Materials and methods: four burs from each type have been selected. Tablets made of human tooth fragments embedded in epoxy resin (4 to 1 w/w ratio) were used as test specimens. Their abrasion resistance is about 14% higher than that of the dentin. The burs were m…

Efficacy and safety of an intraoral electrostimulation device for xerostomia relief: a multicenter, randomized trial.

Objective To evaluate the efficacy and safety of an intraoral electrostimulation device, consisting of stimulating electrodes, an electronic circuit, and a power source, in treating xerostomia. The device delivers electrostimulation through the oral mucosa to the lingual nerve in order to enhance the salivary reflex. Methods The device was tested on a sample of patients with xerostomia due to Sjogren's syndrome and other sicca conditions in a 2-stage prospective, randomized, multicenter trial. Stage I was a double-blind, crossover stage designed to compare the effects of the electrically active device with the sham device, each used for 1 month, and stage II was a 3-month open-label stage d…

Condizioni di edentulia e necessità di trattamento protesico in un campione di popolazione della città di Palermo

Disinfezione per immersione di due elastomeri: valutazione dell’efficacia di due disinfettanti e relative variazioni dimensionali

The role of antibiotic prophylaxis in reducing bacterial contamination of autologous bone graft collected from implant site

The aim of this study was to evaluate if antibiotic prophylaxis reduces the bacterial contamination of bone particles collected directly from the burs used for implant site preparation. Thirty-four patients underwent the surgical procedures for a total of 34 implant sites. One 1 gr. tablet of amoxicillin + clavulanic acid was given to the test group 12 hours and 1 hour before the surgery. The control group did not take antibiotic prophylaxis. Bone particles were collected and centrifuged. The suspensions were subjected to serial dilutions and each dilution was examined twice using a spatulation technique in Trypticase Soy Agar (TSA), in Sabouraud Dextrose Agar, and in Mitis Salivarius Agar …

Condizioni di edentulismo e necessità di trattamento protesico in un campione della popolazione adulta della città di Palermo

The aim of this study was to evaluate the level of edentulousness and the prosthetic treatment need in a sample of the over 18-year-old inhabitants of Palermo (Italy). A stratified sample of 385 subjects (183 female and 202 male) was taken to represent the population of the city. Each subject included in the study was examined to record the level of edentulousness (complete edentulousness, partial edentulousness, intact dentition) and the level of denture wearing. Requirement for repair of dentures was recorded according to the marginal fitting for fixed dentures, and to the extension, stability and retention for removable dentures. Complete edentulousness of one or both arches was present …

Candida pararugosa isolation from the oral cavity of an Italian denture wearer

Candida pararugosa was first isolated from human feces, but after the initial description no further recovery from humans has been reported. During a study on oral Candida colonization in denture wearers living in Palermo (Italy), we isolated C. pararugosa from a 61-year-old woman without signs of oral candidosis. This constitutes, to the authors' knowledge, the first isolation of C. pararugosa from the oral cavity. After six months, colonization by C. pararugosa persisted, suggesting that this species could be a component of the normal oral microbiota. The identification procedure we used could be useful in elucidating the epidemiology of C. pararugosa and for establishing its clinical sig…

Restauro post-endodontico con perni in fibra di quarzo: nota preliminare.

Tooth-implant connection in removable denture.

When the patient cannot be rehabilitated with a fixed denture, or when he does not succeed in adapting to a traditional removable denture, a possible alternative solution consists in the use of a limited number of implants, placed in strategic positions in the arches of the patient, and subsequently connected to their residual teeth. The aim of this review is to evaluate the progress made on connections between teeth and implants in removable denture, to analyze their advantages and disadvantages and to compare the survival rate, both of the teeth and of the implants used as abutments, present in the various studies taken into examination, with the aim of being able to evaluate the effectiv…

Surface treatments for titanium implants

The implant surface is considered one of the most important factors for osteointegration. A factor that proved to be crucial for a better, faster osteointegration is surface roughness. It has been widely shown that an increase in roughness corresponds to a better microretention between implant and bone macromolecules. Titanium surface can be prepared with different techniques in order to obtain an optimal degree of surface roughness, an increase of TiO2 thickness, or even to create a coating of osteoconductive material. This article describes the most widely used and investigated techniques to modify a titanium implant surface: Addition techniques: titanium oxide layer thickening, TPS (Tita…

Resistance to disinfection of a polymicrobial association contaminating the surface of elastomeric dental impressions.

The aim of this study was to evaluate the ability to resist disinfection of a polymicrobial association contaminating the surface of dental impressions obtained with two different elastomers: a polyether (Impregum) and an addition-polymerized silicone (Elite). Impressions were contaminated with a mixture of three biofilm-forming microorganisms (Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans) and disinfected immediately after contamination, or after microbial layers were allowed to develop during a six-hour storage. Two commercial disinfectants were tested: MD 520 containing 0.5% glutaraldehyde and Sterigum Powder without glutaraldehyde. Residual contamination was recover…

Infiltrazione marginale di tre diversi sistemi di cementazione per inlay in composito: Analisi comparativa in vitro.

Analisi in vitro della quantità di tessuti duri asportati in seguito a preparazioni coronali in protesi fissa

Stabilità cromatica di resine per protesi fissa provvisoria: valutazione comparativa in vitro.

Implant overdentures: recommendations and analysis of the clinical benefits.

Due to the progress made in implantology, in recent years the interest in prosthetic rehabilitation in edentulous mouths using overdentures has increased considerably. Indications to the treatment of implant supported overdenture could be classified in three groups: the first group consists of younger members of the elderly population who have an edentulous upper jaw rehabilitated with a conventional complete denture but experience discomfort with it and therefore desire a stable prosthesis and greater comfort in the mouth; the second group, for which the use of implant overdentures is recommended, consists of older patients who require greater stability from a complete mandibular denture; …

Effetto sulla formazione della placca batterica di alcuni chewing gum sugar-free. Indagine comparativa in vivo.

Viability and integrity of cell present in particulate bone collected during the preparation of the implant site: a preliminary study

Aim: The aim of this study was to evaluate viability and integrity of cells (Osteoblasts and Osteocytes) present in the particulate bone (Bone Chips), obtained during the preparation of the implant site. Methods: Four patients aged between the IV and the VI decade presenting edentulous areas class III of Cawood and Howell were selected. All patients suffering from systemic and oral diseases and smoking were excluded. The surgeries were performed with the conventional technique, full-thickness flap, and the implant sites were prepared with large coils calibrated burs mounted on surgical micromotor at a speed of 600 rpm and external irrigation of saline solution previously cooled . The partic…

The effects of sugar-free chewing gums on dental plaque regrowth: a comparative study

Abstract Sugar-free chewing gum has been claimed to be a useful means of reducing dental plaque accumulation. The incorporation of additives, such as enzymes, abrasives and divalent metal ions, into gum formulations might improve their antiplaque activity, particularly at the buccal and lingual surfaces of the teeth. Objectives The aim of this study was to investigate the plaque inhibitory effects of three sugar-free chewing gums each containing lactoperoxidase (LP), micro granules of silicon dioxide (SD), and zinc gluconate (ZG). Methods The study was an observer-masked, randomized cross-over design balanced for carryover effects, involving 12 healthy volunteers in a 4-day plaque regrowth …

Analisi sperimentale comparativa in vitro della citotossicità di quattro tipi di resine per basi proteiche per protesi mobile.

Introduction of a system for choosing and placing the anterior teeth of complete dentures.

Valutazione delle caratteristiche di assorbimento delle resine proteiche mediante un metodo RGB

Permanence of Modifications in Oral Microcirculation in Ex-Smokers.

Background: The aim of this study was to assess the long-term effects of smoking and to investigate the permanence of this damage to the oral microcirculation. Material/Methods: We recruited 75 patients and divided them into 3 groups: group 1 was composed of 25 healthy non-smokers, group 2 was composed of 25 healthy current smokers, and group 3 was composed of 25 healthy ex-smokers. Video-capillaroscopic examination was performed on all patients. The video-capillaroscopic investigation was performed on patients in sitting position, always with the same light source, at the same room temperature (23°C), in the morning, with the same operator (GAS), and was repeated many times for every area …

Effect of endodontic treatment on fatigue resistance of fiber posts bonding

Objectives: The aim of this study is to evaluate the effect of the endodontic treatment on the fatigue resistance of endodontic post adhesive interfaces. Materials and methods: 50 single-rooted human teeth have been severed at the cement-enamel junction and randomly assigned to 5 groups receiving different endodontic treatments as follows: 1) distilled water + gutta-percha (control); 2) NaOCl 5% + gutta-percha and Pulp Canal Sealer EWT (Kerr); 3) NaOCl 5% + gutta-percha and Top Seal (Dentsply-Maillefer); 4) NaOCl 5% and EDTA 10% (alternatively) + gutta-percha and Pulp Canal Sealer EWT; 5) NaOCl 5% and EDTA 10% (alternatively) + gutta-percha and Top Seal. Subsequently, Light-Post DT #2 quart…

Intraoral electrostimulator for xerostomia relief: a long-term, multicenter, open-label, uncontrolled, clinical trial

Objective A previous sham-controlled multinational study demonstrated the short-term efficacy and safety for xerostomia treatment of an intraoral device that delivers electrostimulation to the lingual nerve. The objective of this study was to test the hypothesis that those beneficial effects would be sustained over an 11-month period. Study Design The device was tested on a mixed sample of 94 patients with xerostomia in an open-label, uncontrolled, prospective multicenter trial. Statutory outcome assessments were done at 5th, 8th, and 11th months and analyzed by multiple comparisons. Results Improvements achieved at month 5 from baseline were sustained throughout the follow-up period for th…

Disinfezione di impronte rilevate in elastomero: valutazione dell’efficacia del sistema Dürr-Hygojet

Preliminary study about the efficiency of diode laser compared with retraction cords used for exposing the finishing lines of dental abutments before the optic impression

Lesione ulcerativa della mucosa orale: diagnosi di un caso clinico.

Le stomatopatie possono avere manifestazioni cliniche differenziabili, ma in alcuni casi sono sovrapponibili. In quest’ultima evenienza la diagnostica differenziale ha un ruolo di primo piano al fine di giungere ad una corretta diagnosi e quindi ad un corretto management terapeutico. Da questo punto di vista le classificazioni delle stomatopatie devono consentire un percorso diagnostico razionale. I metodi classificativi non vanno considerati come meri elenchi ma devono consentire ai clinici un linguaggio comune ed un algoritmo diagnostico ragionato e quindi corretto. Gli autori presentano un suggestivo caso clinico di lesione ulcerativa della mucosa orale che a prima impressione poteva ind…

The effect of immersion disinfection procedures on dimensional stability of two elastomeric impression materials

The aim of this study was to determine the effect of immersion disinfection procedures on the dimensional stability of two elastomeric impression materials. Impressions of a stainless steel die were made with polyether (PE) and with additionpolymerized silicone rubber (PVS). The test specimens underwent disinfection treatment by immersion in two commercially available solutions containing quaternary ammonium compounds (Sterigum Powder, SP) and glutaraldehyde plus an amino derivative (MD520, MD), respectively. The impressions were measured at 4 different time points: before any disinfection treatment (T0); after the first disinfection (T1); 6 hours after the first disinfection (T2); after th…

Resistenza a fatica di tre diversi sistemi di cementazione per inlay in composito.

L'occlusione nelle riabilitazioni protesiche implantologiche: revisione della letteratura e concetti attuali

Inserendo degli impianti all'interno dell'osso mascellare, si crea un sistema biologico impianto-osso, che reagisce alle forze occlusali in modo differente da come reagisce un dente naturale sul quale è ancora presente il legamento parodontale. Pertanto, una riabilitazione implantoprotesica va progettata in modo che essa non comporti un sovraccarico occlusale, in quanto quest'ultimo è spesso una delle cause riconosciute di perdita di osso periimplantare, di fallimento dell'impianto e/o del complesso impianto-protesi. Il sovraccarico occlusale generato da progetti occlusali incongrui, oppure da cantilever estesi. o da interferenze nei movimenti eccentrici della mandibola, o parafunzioni, può…

Riabilitazione protesica totale in paziente allergico al metil-metacrilato: caso clinico.