Shlomo Matalon

Tel Aviv University | TAU · Department of Oral Rehabilitation

Objectives: Repeated abutment disconnection/reconnection may compromise the mucosal barrier and result in crestal bone level changes. The clinical significance of this phenomenon is not yet clear, as most studies on this topic are short-term. Therefore, the aim of the present study was to evaluate the influence of abutment disconnections and recon...

Little is reported about the prosthetic aftercare of implant-supported mandibular overdentures regarding the number of implants placed. The purpose of this study was to evaluate the prosthetic aftercare among edentulous patients restored with two vs. four mandibular implant-retained overdentures (MISOD). Forty-six consecutive edentulous patients tr...

Objectives To retrospectively assess implant and prosthesis survival and success and patient satisfaction in edentulous patients treated with soft-milled cobalt-chromium-ceramic full-arch screw-retained implant-supported prostheses (SCCSIPs) over a mean clinical follow-up period of 4 years.Materials and methodsTwenty-one edentulous patients, aged 4...

Two critical factors that influence the accuracy of an impression include the proper manipulation of the impression materials and the technique used to make the impression. The purpose of this study was to clinically evaluate the effect of different mixing techniques on the accuracy of vinyl polysiloxane (VPS) impressions by assessing metal framewo...

Background: Various parameters are known to affect the amount and type of mucosal thickening. The aim of this retrospective study was to investigate these effects through a survey of cone-beam computed tomography (CBCT) images. CBCT scans of 150 patients, which included the area of the MS and maxillary teeth (canine, first premolar, second premolar...

We assessed age-related excisional palatal mucoperiosteal wound closure in rats. A 4.2 mm diameter punch was used to create a secondary healing defect in the palate of Wistar rats. Study group—21, 18-month-old vs. control 21, 2-month-old males. The 2-dimensional area, maximum length and width of the soft tissue defect served as clinical outcome par...

Purpose: To compare the temperature changes during the setting process of two provisional crown materials, polymethyl methacrylate (PMMA)-based acrylic resin (Ac) and bis-acryl composite resin (Co), at the first thread surface of one-piece implants. Materials and methods: Twenty-two 3.3-mm-diameter one-piece implants were divided into two groups...

This study aimed to characterize the demographic and clinical features of underreported surgical ciliated cysts developing after sinus floor augmentation, based on a series of cases from our files and a systematic review of the literature. A series of five cases (four patients) of microscopically confirmed surgical ciliated cysts following sinus fl...

Background and objectives: Preservation of alveolar ridge contour following tooth extraction is important to allow for restoration with prosthetics and implants. Socket seal surgery was introduced more than two decades ago for preservation of the form, volume and bone quality of the postextraction ridge. The aim of this retrospective study was to a...

Purpose: This in vitro study was designed to compare bacterial adhesion to zirconia versus lithium disilicate crowns after artificial aging. Materials and methods: Seventy-five discs were tested in this study: 25 Cr-Co base metal discs (control), 25 zirconia discs, and 25 lithium disilicate discs. Each sample was polished and glazed appropriatel...

This study aimed to determine the bactericidal efficacy of sequential use of NaOCl pH 12 followed by acidified NaOCl pH 6.5, and compare it to that of either of these NaOCl solutions alone. E. faecalis biofilm was grown on standardized dentine specimens for four weeks. The specimens were randomly divided into four groups: (A) 4 min exposure to 0.9%...

This in vitro preliminary study investigated the attachment of Fusobacterium nucleatum and Porphyromonas gingivalis on titanium alloy healing abutments, which differed in their surface macro-morphology: one was groove-marked while the other was completely smooth. Altogether, twenty implant-healing abutments, ten of each macro-morphology, were evalu...

The rapid advancement of peptide and amino acid based nanotechnology offers new approaches for the development of biomedical materials. The utilization of fluorenylmethyloxycarbonyl (Fmoc)-decorated self-assembling building blocks for antimicrobial and anti-inflammatory purposes represents promising advancements in this field. Here, we present the...

Purpose: To assess the clinical performance of the complete rehabilitation of a series of patients with bruxism treated by teeth- and implant-supported veneered and non-veneered zirconia restorations with an increased vertical dimension of occlusion (VDO). Methods: Ten patients with bruxism, aged 62-70 years, were treated with 108 veneered and 1...

Background: The overall success and predictability of dental implant treatment hinge on the primary stability, direct bone-to implant contact formation, and quantity and/or quality of residual bone. Pulsed electromagnetic field has been reported to increase bone regeneration in various clinical situations. Therefore, it was hypothesized that devic...

Objectives: A lack of appropriate adhesiveness is one of the biggest problems in restorative dentistry today and the main cause of microleakage. This is especially true in pediatric dentistry where moisture control is more difficult to achieve. Glass ionomer restorative materials increase adhesion and decrease microleakage given their chemical adh...

SureFil SDR is a flowable resin-based composite that allows a single incremental bulk placement. The marginal seal of SureFil SDR at the gingival margins of class II restorations located apical to the cemento-enamel-junction (CEJ) has not been adequately evaluated compared to those located occlusal to the CEJ. Forty class II cavities were prepared...

Purpose: The objective of this study was to assess whether long-term implant survival rates and bone loss in patients with moderately controlled type 2 diabetes is similar to the rates reported in the nondiabetic population. Materials and methods: This retrospective observational study utilized patient medical records from a general practitioner...

Objective: To use a modified direct contact test (DCT) to evaluate the bacterial growth on 3 commercially available implants. Materials and methods: Streptococcus salivarius growth was tested on 1 machined surface and 2 commercial rough surface implants. Seven implants from each group were fixed to the cover of a 96-well microtiter plate. Bacter...

Aim: This study investigated strain levels during and after implant insertion, and during and after simulated mastication, in splinted and nonsplinted restorations with different occlusal schemes. Materials and methods: Fresh bovine bone resembling type I jawbone was collected. Strain gauges were placed at each implant's neck, one horizontally a...

The present study was based on the screening of procedures and materials used by dentists in constructing complete removable dental prostheses, considering their professional background and years of experience. Questions arose regarding differences and similarities within the local dental society, of which approximately 75% were trained in European...

The purpose of this work is to evaluate changes in temperature of one-piece titanium implant surface during the setting of acrylic resin temporary crowns and to correlate thermal changes to implant diameter. Thirty-Three one-piece implants (ARRP, Alpha-Biotec) were divided into 3 groups according to diameter size (G1=3 mm, G2=3.3 mm, G3=3.6 mm). Im...

Denture adhesives are widely used in dentistry. The growth of Candida albicans on the denture base is common on both jaws, particularly in elderly patients. A strong correlation has been found between the growth of Candida albicans and dentures, potentially leading to denture stomatitis. Recent studies show that the addition of chlorhexidine diacet...

Introduction: The success of implant-supported restorations is dependent on proper treatment planning, effective communication within the clinical team, and the use of appropriate methods and materials in the dental laboratory. The objective of this study was to determine collaboration trends between dentists and laboratories and to assess the com...

A retrospective evaluation of 24 subjects treated with one-piece (1P) (n = 34) and two-piece (2P) (n = 38) implants placed in contralateral mandibular premolar locations was conducted. Cumulative implant survival was 100% following a 5-year (range = 59.9-72.3 months; mean = 63.1 months) postrestoration monitoring period. Bone loss (P = .1952) and p...

Aim: The aim of this study was to present the implant macrostructure effect on marginal bone loss using 3 dental implant thread designs with differences in thread pitch, lead, and helix angle. All implants used were sourced from the same company and had the same microstructured surface. Materials and methods: This is a nonrandomized, retrospecti...

Aim: To compare the efficacy of the XP-endo Finisher file (XP) (FKG Dentaire, La Chaux de Fonds, Switzerland) to that of passive ultrasonic irrigation (PUI) and conventional syringe and needle irrigation (SNI) in the removal of calcium hydroxide paste from an artificial standardized groove in the apical third of root canals. Methodology: Sixty-e...

Bone marrow mesenchymal stem cells' (BM-MSCs) role in multiple myeloma (MM) pathogenesis is recognized. Recently, we have published that co-culture of MM cell lines with BM-MSCs results in mutual modulation of phenotype and proteome (via translation initiation (TI) factors eIF4E/eIF4GI) and that there are differences between normal donor BM-MSCs (N...

Statement of problem: Different insertion and loading protocols have been used to implement implant therapy; the consequences of these methods are unclear. Purpose: The purpose of this retrospective study was to compare the long-term outcomes of different implant insertion and loading protocols on crestal bone loss. Material and methods: This...

Objective: Vital tooth preparations may cause irreversible thermal damage to the pulp. The manufacturing techniques of dental burs may decrease heat production and minimize the risk of overheating and trauma to the dental pulp. Strauss (Raanana, Israel) has introduced "premium" diamond burs, claiming superior efficiency and longevity. We sought to...

Purpose: To compare time-dependent outcome of immediately loaded 1-piece (1P) implants with delayed loaded 1P and 2-piece (2P) implants. Materials and methods: A cohort of 33 patients divided into 3 groups: group A, 13 patients, 49 immediately placed and loaded 1P implants; group B, 11 patients, immediately placed and delayed loaded 1P implants;...

Objectives: Evaluate the antibacterial properties of three commercial collagen membranes for guided bone regeneration (GBR). Method and materials: BioGide®, OsseoGuard®, and CopiOs® membranes were tested for antibacterial properties against Streptococcus sanguinis, Staphylococcus aureus, and Staphylococcus epidermidis using a direct contact test...

Objective: The purpose of the present study was to evaluate the antimicrobial properties of four provisional cements with the addition of Chlorhexidine diacetate (CHDA). Method: The Direct Contact Test (DCT) and confocal scanning microscopy were used to evaluate the antimicrobial properties of: Rely X Temp NE, Temp Bond NE, FreeGenol, Cem-Implant...

Objective: The purpose of this study was to examine the antibacterial properties of temporary filling materials in contact with anaerobic bacteria commonly found in the root canal system. Method: The direct contact test (DCT) was used to evaluate the antibacterial properties of IRM, Coltosol, and Systemp inlay, in contact with Actinomyces Viscosu...

Introduction: Implants thread designs mainly affect insertion torque and primary stability. Occlusal forces transmitted by the threads to the adjacent bone contribute to bone load as well. Little is known on the long term results of these forces on bone loss. Objective: To compare bone loss around three thread designs of dental implants with the...

Objective: Type II Diabetes Mellitus is one of the reasons for early bone loss around dental implant. One of the optional consequences for this phenomenon is the insertion protocol that was applied for implant placement. The aim of this study is to compare if early bone loss related to different insertion protocols. Method: This is a non-randomiz...

Objective: Provisional cementation allows clinician to evaluate the aesthetic and functionality of prosthetic restorations, provisional or final. Marginal leakage of the cement can cause secondary carious and/or inflammation of the supporting tissues. Therefore anti-bacterial properties of provisional cements are desirable. The purpose of this...

Interim and definitive restorations cemented with interim cements for a prolonged interval are susceptible to bacterial infiltration and caries formation. The purpose of this in vitro study was to evaluate the long-term fluoride release and solubility of aged ZnO-based interim cements enriched separately with 0.4% NaF and SnF2. Four different brand...

Structured AbstractObjectives To investigate the ability of orthodontic cements to regain their antibacterial effect after aging for 1 month, followed by 2 weeks of fluoride ‘recharging’ through daily fluoride rinse.Materials and Methods Four orthodontic cements were tested: composite resin-based materials (Transbond XT and Transbond Plus), a conve...

Objectives: A controversy exists as to the need to eliminate the smear layer during root canal treatment. Leaving a layer devoid of bacteria in place may enable entombment of bacteria hidden in the dentinal walls, and prevent them from repopulating the root canal system. Pro-Argin based on 8% arginine and calcium carbonate was introduced to treat d...

Objective: The purpose of the study was to evaluate the antimicrobial properties, under anaerobic conditions, of four provisional cements, from three different groups, with the addition of Chlorhexidine diacetate (CHDA). Method: The Direct Contact Test (DCT) was used to evaluate the antimicrobial properties of: Rely X Temp NE, Temp Bond NE, FreeGe...

Sodium hypochlorite (NaOCl) and calcium hydroxide (Ca[OH]2) have tissue dissolution capacity. The aim of this study was to evaluate the potential effect of dentin on their tissue dissolution capacity in a novel dentin model. Dentin models were prepared from 25 freshly extracted human molar teeth; the crowns were separated from the roots, and a rect...

Two phase oil-water mouthwash has been previously shown to efficiently bind oral microorganisms, relying on their cell surface hydrophobicity. The aim of the present in vitro study was to test the cetylpyridinium chloride (CPC) retention and volatile sulfide compounds (VSCs) adsorption abilities of the oil droplets created by mixing of a two phase...

Objective: Provisional cemented restorations often function for extended periods of time in the oral cavity. During this period, the prepared teeth are endangered by provisional-cement washout and secondary caries. The purpose of this study was to evaluate the solubility and water-sorption of 5 types of cements with and without mixing of fluoride...

Objective: Effective polymerization of the composite is essential to obtain long term clinical success. However there are many variables that affect the amount of light energy absorbed at the different layers of the composite. In the present study we examined the different light intensity of LED and QTH and the microhardness of two nanocomposite in...

Objective: In vitro comparison of heat generated during tooth preparation by various diamond burs. Method: Two sets of three “Premium”(PR) and "Standard" (ST) diamond burs were applied on 48 extracted human teeth with intrapulpal thermocouple to measure the temperatures simultaneously during the trial. Eight trials for each bur. The compariso...

Objective: During the last decade, developments in composite resin restorative materials enhance facilitate the procedure; reducing manipulation and chair-side time. Surefil SDR was introduced as flowable resin composite claiming it would allow a 4mm bulk placement in one layer /. The objective of this study was to compare the marginal seal of the...

Objective: The purpose of this study was to survey the efficiency of dental curing lights in dental practices in Israel. Method: 200 curing lights from 124 dental practices throughout Israel were checked using radiometers for the light intensity, IR and UV radiation. Two radiometers were used to measure light intensity of quartz-tungsten-halogen...

Objectives: An in vitro study was performed to evaluate the influence of the centripetal restoration technique on marginal micro leakage with gingival wall located in enamel and in dentin/cementum in comparison to the incremental technique. Methods: Four groups of 14 extracted human molars were prepared with Mesio-occlusal or disto-occlusal cavit...

Objectives: Temporary restorative materials (TRMs) often rapidly lose their dimensional stability and antibacterial properties after exposure to humidity and bacterial infection. Quaternary ammonium polyethyleneimine (QPEI) nanoparticles (NP) are long-lasting, stable, biocompatible, and nonvolatile antibacterial polymers. In the present study, we...

Objective: To test three noneugenol provisional cements (TempBond NE, RelyX Temp NE, and Freegenol) for their antibacterial properties and to test the hypothesis that addition of fluoride varnish confers antibacterial properties on these provisional cements without compromising their tensile strength. Method and materials: A total of 576 cylindr...

INTRODUCTION: Sutures are a vital part of nearly every surgical procedure designed to close and stabilize wound margins consequently allowing undisturbed wound healing. AIM: The aim of this study was to evaluate in vitro antimicrobial effect of 4 commonly used sutures. MATERIALS AND METHODS: The Direct Contact Test was used to evaluate the antibact...

Objectives: The aim of this study was to evaluate the antibacterial properties of 3 resorbable Collagen membranes using the direct contact test (DCT). Methods: 6 samples of each of the following tested collagen membranes: BioGuide® (non-crosslinked porcine collagen membrane, OsseoGuard® (long fiber matrix bovine collagen membrane) and CopiOs® (Bo...

Objectives: Antibacterial orthodontic cements may be advantageous in prevention of carious lesions in the proximity of the orthodontic devices. The aim of this study was to investigate orthodontic cements ability to regain antibacterial effect after aging for 1month, followed by 2 weeks of fluoride "recharging" through daily fluoride rinse. Met...

Antibiotic resistance has prompted the search for new agents that can inhibit bacterial growth. We recently reported on the antibiofilm activities of nanosized ZnO and CuO nanoparticles (NPs) synthesized by using sonochemical irradiation. In this study, we examined the antibacterial activity of ZnO and CuO NPs in a powder form and also examined the...

Extravillous trophoblast cells (EVT) are major players in placental implantation. They differentiate in the villous cell column, invade to the uterus and remodel the uterine spiral arteries. Trophoblast and tumor cells have similar invasion mechanisms, share similar biochemical mediators (e.g. c-myc, MMP9) and growth-factors (e.g. VEGF). The mRNA o...

Crowns cemented on short implant abutments may have insufficient retention. The purpose of this study was to evaluate the effect of circumferential grooves on the retention of cemented cast copings on implant abutments. Sixty similarly-shaped implant abutments were divided into 4 groups (n=15): without grooves, with 1 groove, with 2 grooves, and wi...

Dentists are required to institute infectious control procedures. Dental impression materials possessing antimicrobial properties may aid in reducing the risk of cross contamination since impression materials might play a role as carriers. The purpose of this study was to evaluate the antimicrobial properties of four impression materials. Four impr...

  To test and compare the efficacy of five methods for the removal of root filling material and to test the hypothesis that radiographs fail to represent the real extent of remaining material on canal walls.   Fifty maxillary anterior single-rooted teeth with straight root canals were selected. The coronal third of each root canal was prepared with...

Objectives: To evaluate the antibacterial activity and Diametral Tensile Strength of three provisional aged-cements mixed with Duraphat- varnish (Colgate-Germany). Methods: The tested cements were: TempBond NE, (TBNE, Kerr-US), Freegenol (FG, GC-Japan) and Rely-X (RX, 3M-ESPE) with and without the addition of Duraphat. 12 disks-specimens (6 mm in d...

Cancer and pregnancy coincide relatively rarely, approximately 1 in 1,000 pregnancies [1,2]. However, the current trend of delaying pregnancy, accompanied by age-related increases in the incidence of many malignancies is expected to increase the incidence of pregnancy-associated cancer [1]. The most common malignancies associated with pregnancy are...

Pregnant women with breast cancer present with a more advanced disease compared with non-pregnant women. Nevertheless, breast cancer metastasis to the placenta is rare. Trophoblast/tumor implantations share the same biochemical mediators, while only the first is stringently controlled. We hypothesized that the same mechanisms that affect/restrain p...

To compare the thermal conductivity of two different composite materials, with five light-cure units, in a series of different material thicknesses and light source distances. Two commonly used resin composite restorative materials and three light emitting diodes (LED), one halogen, and one plasma arc lights were selected. The thermal conductivity...

Objectives: Dentists are exposed to a variety of allergens. Studies have claimed that this occupational hazard is underreported due to lack of awareness among professionals. The aim of the study was to estimate the frequency of allergy symptoms among Israeli dentists, to measure their awareness and precautionary measures. Methods: 450 anonymous que...

Pit and fissure sealants are widely used in the prevention of initial occlusal caries. The purpose of this study was to determine whether fluoride releasing pit and fissure sealants regain their antibacterial properties after rinsing with a fluoride solution. Helioseal F, Ultraseal XT, Dyract Seal, and GC Fuji TRIAGE were placed on the sidewalls of...

Multiple myeloma (MM) therapy is hindered by the interaction of the heterogeneous malignant plasma cells with their microenvironment and evolving drug resistance. We have previously shown that the membranal tetraspanins, CD81 and CD82, are under-expressed in MM cells and that their reintroduction causes massive non-apoptotic death. In this study, w...

The microgap at the tooth-restoration interface is inevitable and may allow bacterial penetration that could lead to failure. The purpose of this in vitro study was to assess the antibacterial potential of 4 flowable composite restorative materials. The antibacterial potential of Aeliteflo (Bisco), Filtek Flow (3M ESPE), Tetric Flow (Ivoclar Vivade...

The purpose of this study was to evaluate the antimicrobial effects of root canal sealers. The direct contact test (DCT) was used to assess the antibacterial properties of AH plus, Apexit Plus, Epiphany SE, and RoekoSeal when in contact with Enterococcus faecalis. The materials were examined immediately after setting and 1, 2, 7, and 14 days after...

Polymerized resin composites and nonpolymerized monomers are reported to accelerate bacterial growth. Furthermore, in vivo, resin composite restorations accumulate more plaque than other restorative materials. The purpose of this study was to test the hypothesis that bacteria-composite surface interaction causes changes in surface-topography. Resin...

Provisional crowns cemented with provisional luting agents are susceptible to washout, marginal leakage, and secondary caries when placed for a prolonged period. The purpose of this study was to examine the effect of incorporating chlorhexidine diacetate (antibacterial agent) into provisional cements on retention and marginal leakage of provisional...

To evaluate the effect of manual condensation versus a combination of manual and mechanical, or automatic, condensation on the gingival marginal seal of packable resin composite restorations. Two packable composites, Pyramid Dentin (Bisco Dental) and Filtek P-60 (3M Espe), were tested. The study consisted of 37 extracted caries-free human molars an...

Dental adhesives with antibacterial properties may reduce recurrent or secondary caries. The authors conducted a study to examine the immediate and long-lasting antibacterial properties of four self-etching adhesive systems. The authors used the agar diffusion test (ADT) and direct contact test (DCT) to measure the antibacterial properties of AdheS...

Statins inhibit 3-hydroxy-3-methylglutaryl coenzyme-A reductase, the rate-limiting enzyme of the mevalonate pathway, and are used successfully in the treatment of hypercholesterolaemia. Statins are contraindicated during pregnancy. Lately, we have shown that simvastatin has adverse affects on human first trimester placental explants' proliferation...

A new diagnostic method for detecting cavitated carious lesions in approximal surfaces with the aid of an ultrasonic caries detector (UCD) was tested for clinical use. The objective of this study was to evaluate the efficacy and clinical performance of the UCD system and to compare it with bite-wing radiography by using direct visual inspection dur...

Reactive oxygen and nitrogen intermediates, produced by the interaction of NO with partially reduced oxygen species, affect lung function and homeostasis in a variety of different ways. They act as signaling agents and play an essential role in pathogen killing. On the other hand, they may contribute to tissue injury by upregulating genes responsib...

Cements possessing antibacterial properties may reduce bacteria-induced fixed partial denture complications. The purpose of this study was to evaluate the antibacterial properties of 4 dental cements using the direct contact test (DCT) and the agar diffusion test (ADT). The ADT was performed using mitis salivarius agar plates. Each plate was evenly...

This was to evaluate the antibacterial properties of four different compomers, using direct contact test (DCT) and agar diffusion test (ADT). Compomers (Polyacid Modified Composite Resin) form a group of dental restorative materials which were developed in order to improve conventional glass-ionomer and are widely used by pediatric dentists in prim...

The purpose of this study was to investigate the antibacterial properties of temporary fillings. The direct contact test (DCT) was used to evaluate the antibacterial properties of Revoltek LC, Tempit, Systemp inlay, and IRM. These were tested in contact with Streptococcus mutans and Enterococcus faecalis. The materials were examined immediately aft...