Paulo João Maurício

Instituto superior de ciências da saúde · Prosthodontics

Introduction Despite the improvement in oral health care, tooth loss, for reasons associated with caries or periodontal disease, continues to be a reality in our population [1 Mehta JD, Joglekar AP. Vertical jaw relations as a factor in partial dentures. J Prosthet Dent. 1969;21(6):618–625.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]...

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...

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.[...

Introduction: The biggest challenge in the area of Temporomandibular Dysfunction and pain is the establishment of a classification system that is internationally valid and reliable. The RDC/TMD [1 Le Resche L, Fricton J, Nd M. Research diagnostic criteria, A. Axis I;: Clinical TMD conditions. In Le Resche L, Dworkin S. (eds). Research diagnostic cr...

Objective: The objective of this study was to determine the sealing ability of different root canal cement: resin AH Plus®, calcium hydroxide Sealapex®, and eugenol zinc oxide Pulp Canal Sealer® by measuring the apical penetration of a dye. Methods: One hundred straight single-canal teeth were biomechanically prepared to 0.5 mm of the apical forame...

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...

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...

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...

entrada > congresso > congresso omd 2015 > apresentações científicas > alteração dimensional de dois silicones de adição Alteração Dimensional de Dois Silicones de Adição Póster de investigação em materiais dentários por Sara Lisboa Santos; Francisco Martins; Fernanda Saraiva; María del Carmen Machuca Portillo e Paulo Durão Maurício Póster> Investi...

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: 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...

Objective: To evaluate in vitro the bond strength (μTBS) between a new resin-nano- ceramic material (RNC) and the restorative material, using different surface treatments. Method: Twelve samples of the RNC Lava Ultimate (3M ESPE-Seefeld, Germany) were randomly divided into three groups according to their surface treatment: (G1) Application of the S...

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);...

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...

Objectives: Determine the diferences in IDS when is used clorhexidine (CHX), and analise microtensile bond strenght to dentin and RelyX Ultimate (3M ESPE, St. Paul, MN, USA) and RelyX Unicem (3M ESPE, St. Paul, MN, USA). Methods: Twenty freshly extracted human molars were divided into ten groups of two teeth. The groups were: G1A ( RelyX Ultimate...

A Reabilitação de peças dentárias numa zona anterior é um desafio para qualquer Médico Dentista. A estética é o principal objectivo a alcançar, mas as implicações protéticas tornam-se mais difíceis de contornar quanto menor for o número de peças a Reabilitar. Doente do sexo masculino, com 33 anos de idade, compareceu na consulta com descelamento da...

Objective: The aim of this study is to describe the palatal mucosa microbial flora of individuals with complete mucous-supported dentures, before and after introduction of an oral hygiene protocol. Methods: We observed 120 outpatients at Egas Moniz Dental Clinic, 60 of them complete denture wearers. Each patient was clinically examined and exclusiv...

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...

As cerâmicas dentárias, com uma série de características intrínsecas desejáveis, apresentam-se como um dos principais materiais na ciência e arte da reconstrução dentária. Nos últimos anos a zircónia tem sido o foco principal de interesse por apresentar melhores propriedades mecânicas e elevado nível de biocompatibilidade, em relação a outras cerâm...

To investigate regional shear bond strength to lateral walls of ceramic inlays in occlusal and occlusoproximal cavities using etch-and-rinse and self-adhesive resin cements and a glass-ionomer luting agent. IPS e.max Press ceramic inlays were made in 50 Class I and 50 Class II standardized cavities in intact extracted human molars and divided into...

Objective: Compare the push-out bond strength of fiber post (Rebilda Post®, Voco, Cuxhaven) luted with resin cement (Rebilda DC®, Voco, Cuxhaven) in different root thirds (cervical, middle,apical) after 24 hour storage and six months storage with core. Methods: twenty human anterior teeth extracted for periodontal reasons were decoronated and endo...

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...

Objectives: The aim of this study was to evaluate “in vitro” the regional bond strength using Push-out test, after 24 hours and six months of storage, in different thirds of the root canal (cervical, middle and apical), after endodontic treatment and glass fiber posts Voco® luted with self adhesive Voco® and resin cement core•X™ flow, (Dentsply Cor...

https://iadr.confex.com/iadr/pef08/techprogram/abstract_111011.htm

To compare regional bond strength in different thirds of the root canal, among glass fiber-reinforced (FRC) endodontic posts luted with different cements, using the push-out test. Sixty extracted human anterior teeth were endodontically treated with gutta-percha and AH Plus sealer. The crown portion was removed, and a dowel space was prepared. Prep...

Using the push-out technique, this study compared the influence of different composite insertion techniques in Class I cavities on the regional shear bond strength to lateral walls. Standardized Class I cavities were prepared on the occlusal surface of 60 freshly extracted third molars, which were randomly assigned to one of five groups (n = 10). T...