Jose Reis

Egaz Moniz School of Health and Science · Oral Rehabilitation

The fracture of anterior teeth in children and adolescents is a common injury. When most tooth structure is compromised and the broken fragment is not recovered, its restoration can become rather complex to both dentist and dental technician. Restoration of single anterior elements is one of the most demanding challenges in fixed prosthodontics. Th...

Objective: Study of the dimensional stability of three addition silicones after steam autoclave sterilization. Method: For this study, addition silicones were used in an automatic mixing machine, Pentamix 2 (3M ESPETM): Express Penta H (3M ESPETM), Affinis System 360 (Coltène/Whaledent), Aquasil Ultra Heavy Regular – Smart Wetting Impression Ma...

Objective: The aim of this study was to evaluate the quality of the apical seal in teeth with a single root canal performed by undergraduate dental student's (4th year, Juniors) carrying out their first post cementantion at Instituto Superior de Ciências da Saúde Egas Moniz, Portugal, School of Dentistry. Method: 106 teeth were obturated using gu...

Dental implants are widely used in replacing missing teeth. However, some problems may occur such as screw loosening or screw fracture which lead to implant failure. In this regard, it is of utmost importance to analyse some of the factors that affect the primary stability and consequently the osseointegration of dental systems. In the present stud...

Background: Classify and quantify the wear of the implant and abutment interface simulating a loose screw situation. Methods: Nine external connection titanium implants were split into 4 groups: Group A (no hexagon titanium abutment), Group B Titanium abutment (with hexagon) (n=3), Group C Zirconia abutment with hexagon (n=3) and Group D mix abutme...

Polyhydroxyalkanoates (PHAs) are promising biopolymers as an alternative to traditional synthetic polymers due to their biodegradability and biocompatibility. The PHA market is blooming in response to the growing demand for biodegradable and environmentally friendly plastics. These biopolyesters are produced and degraded by a variety of microorgani...

Achieving color match between natural teeth and restorative materials is crucial in dentistry. Factors such as the light source, brightness, and opacity influence tooth color, determined by light absorption and scattering within the material. Advances in CAD/CAM systems have enhanced prosthodontic treatments, particularly with new temporary materia...

The color match between natural teeth and restorative materials is critical in dentistry for achieving aesthetic outcomes. Various factors such as light source, brightness, opacity, and visual perception influence teeth color. The intrinsic color of dental structures is determined by light absorption and scattering within the tooth material. Recent...

The purpose of this study was to evaluate the color changes of feldspathic ceramics CEREC Blocs (Dentsply Sirona, Milford, DE, USA) when cemented with different luting agents, while varying the ceramic thickness. Seventy ceramic discs of feldspathic ceramic (A2 shade) were obtained with 0.5 and 0.8 mm thicknesses. Seventy composite discs (A3 shade)...

(1) Background: The shade of resin-based materials and ceramic thickness influence the optical color of laminate restorations. The purpose of this study is to evaluate—in vitro—the effect of resin-based cement shade and ceramic thickness on fluorescence of feldspathic laminate veneers; (2) Methods: 180 samples of feldspathic ceramic A2 shade with t...

Objective The purpose of this study is to evaluate the color changes of lithium disilicate ceramics when cemented with different brands of cement by varying the thickness of the ceramic. Materials and Methods Forty ceramic discs, shade A2, were fabricated with 0.5 and 0.8 mm thickness. Forty composite resin discs, shade A3, were also produced. The...

A papila ou gengiva interdentária quando íntegra constitui um importante atributo na arquitetura do sorriso tendo também funções fisiológicas e anatómicas. O incompleto preenchimento da ameia cervical pela papila dá origem aos chamados triângulos negros gengivais. Estes, podem causar problemas fonéticos e estéticos além de propiciar a acumulação de...

Objectives: Our goal is to evaluate the effect of lactic acid exposure on the surface of a composite resin Methods: Samples of Filtek TM Z250 (n=48) were randomly distributed into four groups (n = 12) with two solutions, 5 mL artificial saliva (group A and B) or lactic acid (pH=4) (Group C and D). For Group C and D the protocol followed an 8 hour i...

Objectives: Practicing sports places the human body at constant risk of injury. The most vulnerable and less protected body area is the face, thus, a greater risk for orofacial injury exists, being the most common: dental injuryThe aim of this study was to evaluate dental injury in young basketball players and the use of protective mouthguards. Met...

Objectives: To evaluate the effect of resin-based luting agenton the fluorescence on feldspathic ceramics with different thickness. Methods: Feldspathic ceramic (CEREC Blocs) discs, A2, with thicknesses of 0.5 and 0.8 mm were obtained (n=180). Resin composite discs (Filtek Supreme XTE, A3 Body) were prepared using a resin former, according to the m...

Objectives: Patients that develop reflux of stomach contents have an unusual exposure of the oral tissues to hydrochloric acid, leading to dental erosion and to the degradation of restorative dental materials. Our goal is to evaluate the effect of hydrochloric acid exposure on the surface of a composite resin. Methods: 48 samples of Filtek TM Z250...

Objectives: Evaluate the prevalence of parcial edentulism among a goup of patients of the Egas Moniz Dental Clinic, according to Kennedy classification, age, gender, and prosthodontic treatment. Methods: All clinical charts (240) of the prosthodontic clinic between September 2014 and June 2015 were evaluated and characterized by: age, sex, Kennedy...

Oral rehabilitation success depends upon the accuracy and dimensional stability of the impressions. The purpose of this study is to evaluate the dimensional changes of a first impression type VPS (Vinyl Polysiloxane) (Imprint™ 4 Preliminary Penta™ Super Quick, 3M ESPE™, St Paul, MN, USA). 10 samples were obtained from this silicone with an automati...

In this work, the effect of the exposure to acids that are usually present in the mouth environment on the tribological behavior of restorative dental microcomposites is evaluated. A commercial microcomposite widely used in dentistry (Filtek Z250) and a strong and a week acid that are part of the mouth environment (hydrochloric and lactic acid, res...

Introduction: Lactic acid concentration in the blood and saliva increases during physical exercise, leading to dental erosion and the degradation of restorative dental materials. Our goal is to evaluate the effect of lactic acid exposure on the surface of a composite resin Materials and methods: 16 discs were made from Filtek ™ Z250. Every disc wa...

Introduction: Multiple factors like age, gender and sociocultural factors contribute to tooth loss(1,2,3). Despite improved healthcare,37% of the Portuguese population has more than 6 teeth missing (4). With the exception of the study by Carneiro (1) carried out in Oporto, and Forjaz (5) there is a lack of Portuguese studies that address this issue...

Introduction: Practicing sports places the human body at constant risk of injury. The most vulnerable and less protected body area is the face, thus, a greater risk for orofacial injury exists, being the most common: dental injury [1 Ranalli DN. Sports dentistry and dental traumatology. Dental Traumatology. 2002;18(5):231–236.[Crossref], [PubMed],...

Introduction: Ceramic veneers color is determined by the color and thickness of the ceramic, the cement and dental substrate color [1 Cubas GBA, Camacho GB, Demarco FF, et al. The effect of luting agents and ceramic thickness on the color variation of different ceramics against a chromatic background. European Journal of Dentistry. 2011;5:245–252.[...

Loosening and fracture of implanted dental crowns is a consequence of relative micromovements between the zirconia abutment and the titanium alloy of the implant, in a biochemical aggressive environment. Thus, it is important to establish the in vitro tribological testing conditions that better mimics such environment. The present work aims to eval...

Objective: Oral rehabilitation success is enhanced by an accurate and reproducible final impression. The purpose of this study is to evaluate the dimensional changes of a polyether and addition silicone subjected to disinfection and/or sterilization after a long storage period. Material and methods: Ninety samples were obtained from polyether Impre...

O tipo de edentulismo relaciona-se com diversos fatores segundo vários estudos de prevalência. Em Portugal não encontramos muitos estudos que abordem esta temática. Um estudo deste tipo pode ser interessante e motivar estudos mais aprofundados. Caracterizar os desdentados parciais numa amostra de doentes da Clínica. Consultados os processos dos doe...

Dental implants are in general made of titanium, since this material promotes a stable and functional connection between the bone and the surface of the implant. Efforts produced during the chewing cycles may interfere with this union, affecting the process of osseointegration and eventually compromising the stability of the implant.

Introduction: According to the OMD Oral Health Barometer in 2015, 37% of the questioned have more than 6 missing teeth. Several prevalence studies indicate that the type of tooth loss is associated with several factors. In Portugal we didn´t find many studies that address this issue. We consider that this study can be interesting and motivate furth...

Introduction In contrast to the high success rates of osseointegration (95% to 97%), mechanical complications are still common in implant dentistry (reported to be as high as 44.9%) Mechanical complications such as screw loosening, screw fracture, and framework fracture. Objectives Evaluate the wear of the implant-abutments interface after a torsio...

Introduction: Oral rehabilitation with implants is quite common nowadays, as well as the prevalence of periodontal disease in patients seeking this type of rehabilitation.It becomes important to evaluate the success rate of implant placement in periodontal patients. Objective: Compare the success of rehabilitation with dental implants in patients w...

Introduction Dental impressions play a key role in clinical practice, and it is crucial to know the impact of disinfection or sterilization in it. The success of oral rehabilitation depends on the accuracy and reproducibility of the oral impressions [1,2,3]. The addition silicones and polyethers tend to be used most frequently due to it's physical...

Introdução: O sucesso da reabilitação oral depende de vários factores, entre os quais estabilidade dimensional e a reprodução detalhada das impressões. Objectivo: Estudar as alterações dimensionais de um poliéter submetido a desinfecção e esterilização após um período de armazenamento de seis meses. Materiais e Métodos: Das amostras previamente obt...

Objectives: To classify and quantify the wear of the implant and abutments interface after a rotational test that simulates a loose abutment situation. Methods: 5 implants, 1 no hex titanium abutment, 2 hex titanium abutment, 2 hex Zirconia abutment and 5 titanium screws were studied. Prior to testing the rotational freedom for each pair was acc...

Objectives: To classify and quantify the wear of the implant and abutments interface after a rotational test that simulates a loose abutment situation. Methods: 5 implants, 1 no hex titanium abutment, 2 hex titanium abutment, 2 hex Zirconia abutment and 5 titanium screws were studied. Prior to testing the rotational freedom for each pair was access...

Interferometria laser em medicina dentária

Introduction: Removable partial dentures are used to rehabilitate oral function, esthetic and phonetics after teeth loss. Objectives: Make a profile study of the patient and the prosthodontic treatment of the Oral Rehabilitation Clinic I of the Dental Medicine Master Program of the Instituto Superior de Ciências da Saúde Egas Moniz. Material and Me...

Objective: Study the dimensional changes on gypsum casts poured with 2 addition silicones and a polyether, after the impressions were steam autoclave sterilized and stored. Method: 2 commercial brands of addition silicones and a polyether were used in an automatic mixing machine, Pentamix 2 (3M ESPETM): Aquasil Ultra DECATM Monophase (Dentsply);...

Objectives: Measure the bond strength of cement with the push-out test in different root thirds (cervical, middle and apical) at 24h and at 6 months with and without restoration and with different cements. Methods: 90 monoradicular teeth, crowns were cut and endodontic treatment was made. The canal preparation was made with a calibrated drill syste...

Objectives: Measure the bond strength of cement with the push-out test in different root thirds (cervical, middle and apical) and evaluate the type of fracture produced at 6 months with or without a restoration. Methods: 20 monoradicular teeth, crowns were cut and endodontic treatment of the root (AH plus® Dentsply De Trey, Germany and gutta-perch...

Objectives: Measure the bond strength of cement with the push-out test in different root thirds (cervical, middle and apical) and evaluate the type of fracture produced at 24 h and at 6 months. Methods: 20 monoradicular teeth, crowns were cut and endodontic treatment of the root (AH plus® Dentsply De Trey, Germany and gutta-percha Kerr, Germany) w...