Newton Sesma

• PhD
• Professor (Assistant) at University of São Paulo-School of Dentistry

Objectives This case report describes a digital workflow that integrates restorative and surgical planning through the design and fabrication of a multifunctional guide to optimize outcomes in the treatment of combined lesions. Clinical Considerations Gingival recessions frequently occur alongside non‐carious cervical lesions (NCCLs), forming comb...

Purpose This study aimed to assess the influence of magnetic resonance imaging (MRI) protocol on the decision‐making for the positioning of dental implants in edentulous arches in comparison to planning based on cone beam computed tomography (CBCT). Materials and Methods One phantom was scanned with CBCT and two MRI protocols (T1‐ and T2‐weighted)...

Objective The aim of this report is to present the complete workflow of 3D virtual patient for planning and performing implant surgery with magnetically retained 3D‐printed stackable guides. Clinical Considerations A 3D‐printed stackable system was proposed based on bone, dental, and facial references. Initially, a 66‐year‐old male patient was dig...

Purpose To evaluate the accuracy of magnetic resonance imaging (MRI) for jawbone assessment compared to reference-standard measurements in the literature. Materials and methods An electronic database search was conducted in PubMed, EMBASE, Scopus, Web of Science, and the Cochrane Library in June 2022, and updated in August 2023. Studies evaluating...

Objectives: Natural restorations combine digital workflow and shell technique to create CAD/CAM restorations with the form and texture of natural teeth. This case report describes an interdisciplinary digital workflow combined with CAD/CAM natural restorations to achieve the naturalness of an anterior rehabilitation. Clinical considerations: A 3...

The purpose of this study was to assess the feasibility of SEMAC + VAT to reduce artifacts induced by dental implant-supported restorations, such as its impact on the image quality. Dental-implant supported restorations were installed in a dry mandible. Magnetic resonance scans were acquired on a 3-Tesla MRI system. Artifact suppression (SEMAC + VA...

Background: A 3D virtual patient can be obtained using implant planning systems aligning the digital radiographic and surface datasets. Furthermore, it can be utilized for diagnostic and planning purposes and as a communication tool. Augmented reality and additive manufacturing can improve communication between clinicians and patients, especially i...

This chapter covers the main digital workflow techniques currently used in the field of prosthodontics and restorative dentistry. Dental technologists who become computer‐aided design (CAD) technicians can usually also help to integrating the different steps of digital restorative dentistry. Intraoral scanning can be limited by mouth opening, size...

Objectives The purpose of this systematic review was to search in literature in which severity unintended effects are caused by dental materials in magnetic resonance imaging (MRI), such as to evaluate whether these artifacts hamper the diagnosis in the head and neck region. Materials and Methods Clinical studies showing the severity of artifacts...

This dental technique describes a novel cost-effective workflow for integrating mandible kinematics into a static virtual patient. Computed tomography data are segmented and merged with intraoral surface scans and a target tracking video reproducing the mandible movements. A 4-dimensional dynamic virtual patient is created by using an open-source s...

Objective The present case report describes digital approaches to plan an orthodontic and periodontal rehabilitation at the anterior esthetic zone. Clinical Considerations A young patient attended to the dental practice with esthetic concerns. The facially driven digital planning showed the need of an interdisciplinary treatment to improve smile h...

Statement of problem: Facial scanning systems have been developed as auxiliary tools for diagnosis and planning in dentistry. However, little is known about the trueness of these free software programs and apps for facial scanning. Purpose: The purpose of this in vitro study was to evaluate the trueness of 3D facial scanning by using Bellus3D an...

The esthetic rehabilitation of anterior ridge defects and the achievement of patient satisfaction has become major clinical challenges for dentists and technicians. Poor diagnosis and treatment planning are frequently associated with multiple surgical procedures which fail to meet patient expectations. The loss of hard and soft tissues in esthetic...

Aim and objective: This case report presents the integration of a digital facially driven prosthetic plan to the computer-assisted implant planning for rehabilitation of edentulous arches. Background: Diagnosis of edentulous arches is hampered by the lack of intraoral references. However, a digital facial profile analysis facilitates the treatme...

Objective: The aim of this report is to present an interdisciplinary approach with novel concepts to virtually plan and achieve esthetics and function. Clinical considerations: Despite the advancements in the digital workflow applied to restorative dentistry, the final outcomes are commonly not similar to initial planning. To overcome this major...

Statement of problem A consensus on the accuracy of additively manufactured casts in comparison with those fabricated by using conventional techniques for fixed dental prostheses is lacking. Purpose The purpose of this systematic review was to determine the accuracy of additively manufactured casts for tooth- or implant-supported fixed dental pros...

A method is presented for obtaining a virtual 4-dimensional patient that replicates the intended esthetic treatment. The process involves facial and intraoral scanning to acquire records and software manipulation to enable a virtual waxing of the smile. Once the digital design is complete, patient information can be merged to generate an animated v...

Objective Despite all advantages provided by the digital workflow, its application in clinical practice is still more focused on device manufacturing and clinical execution than on treatment planning and communication. The most challenging phases of treatment, comprehensive planning, diagnosis, risk assessment, and decision‐making, are still perfor...

The present clinical report describes the rehabilitation of a patient diagnosed with ectodermal dysplasia performed by an interdisciplinary team in a comprehensive approach aided by digital technology. The complexity of the treatment was related to predictability regarding timing and the type of approach. The patient was referred for treatment beca...

New digital tools facilitating data acquisition, team communication, computer-assisted diagnostics, and treatment planning as well as the design and fabrication of restorations, guides, stents and devices in general have fundamentally altered key clinical and laboratory steps. The number of new technologies and the amount of new equipment used toda...

Objective To assess whether digital workflow gives better results than the conventional one in the single implant crowns, when analyzing the impression time, patient preference, time‐efficiency, and adjustment time. Material and methods MEDLINE, Embase, and Cochrane were searched and supplemented via hand search up to June 19, 2019. Only clinical...

Different digital tools have been used in clinical practice to assist in the planning and rehabilitation of patients. Some applications (apps) and software programs used in esthetic planning allow simulation of the smile design, improving communication between patients and professionals. Nonetheless, they are usually difficult to use, time-consumin...

Purpose: New solutions need to be developed for cases in which implants that were placed years ago are now presenting prosthetic complications. A conical head screw design for a single-tooth abutment was developed to preserve the initial applied torque. The aim of this study was to assess the preload maintenance of different screw design sets (a c...

Purpose: To perform a systematic review on studies assessing clinical outcomes in patients rehabilitated with complete-arch fixed implant-supported prostheses according to the time of loading. Materials and methods: Data obtained from patient and clinical outcomes, as implant failure, success rate, survival rate, biological complications, techni...

The aim of this study was to investigate the effects of the use of an occlusal splint on postural balance considering the occlusal splint as a device for treating temporomandibular joint disorder. A randomized, controlled, prospective clinical trial was conducted. The research group consisted of 49 patients (36 as test group and 13 as control group...

Changing the occlusal vertical dimension (OVD) has been one of the most controversial issues of restorative dentistry. The modification of the OVD may be indicated whenever it is necessary to harmonize dentofacial esthetics, provide space for planned restorations, and improve occlusal relationships. The OVD should not be considered an immutable ref...

The purpose of this study was to compare the accuracy of stereolithographic casts with those obtained using conventional implant impressions. An epoxy resin model containing dental implants was used as master model. Dental casts (n=10) were fabricated through both conventional and digital implant impressions. The conventional casts (CC), stereolith...

Statement of problem: The accuracy of the virtual images used in digital dentistry is essential to the success of oral rehabilitation. Purpose: The purpose of this systematic review was to estimate the mean accuracy of digital technologies used to scan facial, skeletal, and intraoral tissues. Material and methods: A search strategy was applied...

Some microorganisms are associated with the formation and deposition of pigmentation on dental surfaces, and its localization, intensity and recurrence persistence can introduce aesthetic disorders. Carbamide peroxide is a bleaching agent that also presents antimicrobial properties. This case report addresses a ten-year clinical follow-up, showing...

Aim The aim of this systematic review was to compare the survival rate and the marginal bone loss between short implants (≤7 mm) placed in the atrophic area and longer implants placed in the augmented bone area of posterior regions of maxillaries. Methods Electronic search using three databases was performed up to May 2017 to identify Randomized C...

Statement of problem: Patients prefer to be rehabilitated as soon as possible if the risk of implant failure is not increased. However, whether immediate loading of single implants is riskier than early loading is not clear. Purpose: This systematic review and meta-analysis investigated whether the immediate loading protocol has more clinical di...

Purpose The purpose of this study was to evaluate the behavior of mandibular canines acting as abutment teeth and indirect retainers of a Kennedy class II according to different designs: lingual rest and lingual rest associated with a reciprocal arm. Materials & methods A resin cast with two simulated canine teeth was made in Ni-Cr alloy, represen...

Introdução: Devido à preocupação com a influência da topografia da resina na retenção mecânica de microrganismos na superfície da prótese, este trabalho se propõe analisar e discutir o desempenho de quatro marcas comerciais de resinas resilientes para uso clínico, quanto à lisura superficial e sua exotermia. Métodos: Foram preparadas 80 amostras de...

Statement of problem: Limited evidence is available comparing digital versus conventional impressions from the point of view of patient preference. Purpose: The purpose of this systematic review was to identify and summarize the available literature related to patient-centered outcomes for digital versus conventional impression techniques. Mate...

Background: Despite the existence of several studies validating the use of narrow diameter implants, most of them are based on pure Ti alloys. There is few clinical evidence of the success of TiZr narrow diameter implants (TiZr NDIs) regarding survival rate (SR) and marginal bone loss (MLB). Purpose: The aim of this review was to systematically...

Background: Chemical modifications of the dental implant surface that improve the wettability result in a faster and better osseointegration. Purpose: The aim of this randomized clinical trial was to evaluate the implant stability quotient (ISQ) of implants with similar designs, treated with 2 surfaces, sandblasted acid-etched (SAE) and hydrophi...

Statement of problem: The internal and marginal adaptation of a computer-aided design and computer-aided manufacturing (CAD-CAM) prosthesis relies on the quality of the 3-dimensional image. The quality of imaging systems requires evaluation. Purpose: The purpose of this in vitro study was to evaluate and compare the trueness of intraoral and ext...

Medical and dental histories, clinical examination, study models, and photographs provide the data for a proper diagnosis and the treatment plan for esthetic dentistry. However, they do not offer all the information necessary to analyze the smile and create harmony with the lips and face without excessive intraoral adjustments. Dentolabial paramete...

The aim of the present study was to perform a software-assisted radiographic assessment of the effect of platform-switching on marginal bone loss (MBL) around dental implants. Forty patients requiring a dental implant in non-grafted partially edentulous mandibles were enrolled and categorized into implants receiving a platform-matched abutment (con...

Harmony among the teeth, lips, and facial components is the goal of prosthodontic treatment, whether performed by conventional or digital workflow methods. This clinical report describes a facial approach to planning computer-guided surgery and immediate computer-aided designed and computer-aided manufactured (CAD-CAM) interim complete-arch fixed d...

The process of tooth loss throughout life, associated with severe occlusal wear, may pose a challenge in the rehabilitation of partially edentulous arches. In these cases, many therapeutic procedures are necessary because each tooth must be restored to obtain the correct anatomical contour and recover the occlusal vertical dimension (OVD). A remova...

Bone grafting provides ideal conditions to the patient′s rehabilitation with dental implants. In addition, prototyped tridimensional models allow the surgical procedure to be simulated and enable important anatomic structures to be visualized. To present a bone defect rehabilitated with xenogenic bone preshaped on a stereolithographic model and the...

This systematic review and meta-analysis aimed to evaluate the survival rate of ceramic and resin inlays, onlays, and overlays and to identify the complication types associated with the main clinical outcomes. Two reviewers searched PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials for articles published between 1983 through Ap...

Objective: The aim of this review was to update the literature with regard to the digital methods available by CEREC Chairside system to register and design the occlusion, to report their efficacy and technical innovations in the field of Restorative Dentistry. A search strategy was performed using the key-words: "virtual articulator," or "CAD-CAM...

There is no consensus on whether incisal coverage is a risk or a protective factor in preparations for ceramic veneers. The aim of this systematic review and meta-analysis was to evaluate the survival rates of preparation designs for ceramic veneers with and without incisal coverage. Primary clinical studies with the following characteristics wer...

Aim: To systematically assess the current dental literature comparing the accuracy of computer-aided implant surgery when using different supporting tissues (tooth, mucosa, or bone). Material and methods: Two reviewers searched PubMed (1972 to January 2015) and the Cochrane Central Register of Controlled Trials (Central) (2002 to January 2015)....

The digital smile design is a practical diagnosis method that can assist the clinician to visualize and measure dentogingival discrepancies. This clinical report aims to present the associated steps, from the diagnosis of the alterations diagnosis through to the final aesthetic result. A 37-years-old female patient presented as her main complaint t...

Purpose: The aim of this study was to perform a systematic review and meta-analysis based on clinical trials that evaluated the main outcomes of glass-ceramic and feldspathic porcelain laminate veneers. Materials and methods: A systematic search was carried out in Cochrane and PubMed databases. From the selected studies, the survival rates for p...

Purpose: The aim of this study was to perform a systematic review and meta-analysis based on clinical trials that evaluated the main outcomes of glass-ceramic and feldspathic porcelain laminate veneers. Materials and Methods: A systematic search was carried out in Cochrane and PubMed databases. From the selected studies, the survival rates for porc...

Introduction: The progressive bone loss at the neck of dental implant is a clinical concern since it affects the maintenance of dental aesthetics. The current study evaluated the influence of insertion depth, prosthetic connection, and type of loading on the stress distribution around dental implants, using photoelastic evaluation. Materials and...

The process of tooth loss throughout life associated with severe occlusal wear may pose a challenge in the rehabilitation of partially edentulous arches. In these cases, many therapeutic procedures are necessary because each tooth must be restored to obtain the correct anatomical contour and recover the occlusal vertical dimension (OVD). A removabl...

Various types of dental preparations for laminate veneers have been proposed,depending on factors such as the properties of the ceramic material, remaining dental structure color, need for altering the dental contour, laboratory fabrication technique, and occlusal relationships. Clinical observations of successes and failures associated with the de...

The aim of this in vitro study was to evaluate, using the photoelastic analysis method, the stress distribution in mandibular bone surrounding a bar-clip overdenture when 2 implant angulations were simulated. Two mandibular photoelastic models were manufactured, with 2 implants embedded in the interforaminal region: model 1 - PAPI, a photoelastic a...

Complete dentures acts as a reservoir for microbial colonization, which may lead to systemic infections. Microwave irradiation has been used as an efficient method of denture disinfection. Even though current methods eliminate denture-base microorganisms, a recurrence rate of denture stomatitis (DS) is still observed among denture-wearing patients....

The aim of this study was to evaluate whether the introduction of a device, resulting from the combination of an o'ring attachment with an orthodontic implant (o'ring ortho implant, O'ROI), to affix the surgical template of CAD/CAM-guided implant surgery contribute to minimizing the deviations in the position and inclination of implants at the time...

The purpose of this study was to evaluate the failure rates of porcelain laminate veneers (PLVs) and the influence of clinical parameters on these rates in a retrospective survey of up to 12 years. Five hundred eighty laminate veneers were bonded in 66 patients. The following parameters were analyzed: type of preparation (depth and margin), crown l...

This article evaluates the long-term clinical performance of porcelain laminate veneers bonded to teeth prepared with the use of an additive mock-up and aesthetic pre-evaluative temporary (APT) technique over a 12-year period. Sixty-six patients were restored with 580 porcelain laminate veneers. The technique, used for diagnosis, esthetic design, t...

The aim of this in vitro study was to evaluate, using the photoelastic analysis method, the stress distribution in mandibular bone surrounding a bar-clip overdenture when 2 implant angulations were simulated. Two mandibular photoelastic models were manufactured, with 2 implants embedded in the interforaminal region: model 1 - PAPI, a photoelastic a...

The present study evaluated the interchangeability of prosthetic components for external hexagon implants by measuring the precision of the implant/abutment (I/A) interface with scanning electron microscopy. Ten implants for each of three brands (SIN, Conexão, Neodent) were tested with their respective abutments (milled CoCr collar rotational and n...

Purpose: To evaluate the influence of sex, implant characteristics, and bone grafting on the survival rate of dual acid-etched (DAE) implants. Materials and methods: Patients treated with internal-hex DAE implants for single tooth replacement in a military dental clinic between January 2005 and December 2010 were included in this study. Clinical...

Objective: The purpose of this research was to evaluate the load transmission on support structures surrounding a bar-clip overdenture using photoelastic and finite element analysis when two implants positions are simulated. Method: Two photoelastic mandible were manufactured with two implants each one, positioned in interforaminal region: AFIP,...

Objective: This study aims to analyze the general characteristics and quality of web pages related to dental implants, obtained from the "most searched" and "most relevant" keywords found on the most popular search engine, Google. Method: Websites were identified using the search engine Google and the most relevant and searched keywords according...

Objective: The aim of this 5-year retrospective clinical study was to evaluate the failure rates of implants installed in the anterior and posterior region of maxilla and mandible. Method: One thousand and twenty patients (809 men and 211 women, aged between 19 and 75 years) received a total of 2130 dental implants. The implants were installed...

This in vitro study evaluated the temperature of dentures after different microwave irradiation protocols. Two complete dentures (one maxillary and one mandibular denture) were irradiated separately 4 times for each of the following 5 protocols: dentures immersed in water (G1- 6 min, G2- 3 min); dentures kept dry (G3- 6 min); dentures placed in the...

This study evaluated the fracture strength of teeth restored with bonded ceramic inlays and overlays compared to sound teeth. Thirty sound human maxillary premolars were assigned to 3 groups: 1- sound/unprepared (control); 2- inlays and 3- overlays. The inlay cavity design was Class II MOD preparation with an occlusal width of 1/2 of the intercuspa...

This study evaluated, in vivo, the efficacy of a denture glazing material (Palaseal) in modifying plaque colonization of dentures. Ten subjects were selected and received maxillary temporary partial removable dentures, with complete acrylic palatal coverage. The right half of the fitting surface of the denture bases were glazed with Palaseal, where...

RESUMO A colonização de fungos e bactérias nas bases de resina acrílica é um dos fatores responsáveis pela estomatite protética, uma das lesões mais prevalen- tes da mucosa bucal. Este estudo se propôs a ava- liar, in vivo, a limpeza de próteses totais imersas em um produto enzimático, por meio de análises micro- biológicas e imagens de microscopia...

A colonização de fungos e bactérias nas bases de resina acrílica é um dos fatores responsáveis pela estomatite protética, uma das lesões mais prevalentes da mucosa bucal. Os métodos empregados para dificultar o acúmulo de microorganismos na prótese usando meios mecânicos e/ou químicos, não tem apresentado resultados satisfatórios. Dentre os químico...