Comparative Effects of Different Materials on Alveolar Preservation.

Objective: The purpose of this study was to compare different materials' effects on alveolar ridge preservation of postextraction sockets in anterior maxilla.

Materials And Method: In this prospective, single center, randomized, controlled clinical trial, healthy patients who needed one single anterior maxillary tooth extraction (including bicuspids) were selected. After a minimally traumatic extraction without complications, 44 patients were randomly allocated into 4 groups: 1) natural socket healing (blood clot), 2) xenograft and gingival free graft, 3) dense polytetrafluoroethylene membrane, and 4) platelet rich fibrin plugs.

Technique with Immediate Implant to Treat Horizontal Defects of the Alveolar Ridge: Analysis of Increased Thickness and Implant Survival.

Objective: To assess bone thickness augmentation and implant survival in ridges with horizontal atrophy managed through split crest technique with concomitant installation of dental implants.

Materials And Methods: Thirteen patients with maxillary bone atrophy underwent surgery and had their bone thickness assessed through cone beam computed tomography 6 months pre- and postoperatively. Comparative measurements of initial and final bone height and thickness were taken using Dolphin Imaging 11.

Three-Dimensional Planning and Surgical Technique for Modified Le Fort I and Le Fort III Osteotomy in Non-Syndromic Patients.

Total midface deficiency, to include the orbits, nose, zygomas, and maxilla, can occur in both syndromic and non-syndromic individuals. The treatment with combination of Le Fort III and I osteotomy could be used and it is few reported in the literature. The aim of the study is to present how technology can make the procedure for the correction of hypoplasia of the middle third more predictable and safer.

Mandibular Angle Contouring Using Porous Polyethylene Stock or PEEK-based Patient Specific Implants. A Critical Analysis.

Contour augmentation and mandibular angle modification surgery is becoming increasingly. The aim of this research is to compare technique and outcomes in augmentations done with standard implants or PEEK-based patient specific implants (PSI) in mandibular angle. Data from surgical planning, operative and post-operative of 6 months follow-up were revised for 21 patients who were submitted to facial surgery using a stock implant obtained from companies currently on the market or 3D implants created with CAD/CAM technology using PEEK 3D printing.

Comparison of two anorganic bovine bone in maxillary sinus lift: a split-mouth study with clinical, radiographical, and histomorphometrical analysis.

Background: Anorganic bovine bone (Bio-Oss®) has been extensively used for reconstruction of posterior area of maxilla in sinus lift procedure; however, a new graft material (Lumina-Bone Porous®), that has a different manufacturing process, has not been yet compared in clinical and histological terms. The manufacturing process of bovine bone graft is related to size and porosity of the particles, and this can change osteoconductive property of the material and bone formation. The use of Lumina-Porus® could improve bone formation, reduce the remaining particles of the biomaterial using a low-cost material.

Is Surgical Treatment Based on a 1-Step or 2-Step Protocol Effective in Managing the Odontogenic Keratocyst?

Purpose: The literature does not present any consensus on a uniform treatment plan for odontogenic keratocysts (OKCs) and does not provide adequate evidence for determining which modality is most effective in lowering morbidity or preventing recurrence. The purpose of this study was to compare the effectiveness of surgical treatment based on a 1- versus 2-step protocol.

Materials And Methods: The authors designed and implemented a retrospective cohort study and enrolled a sample of patients diagnosed with OKC from 1991 through 2018.

Comparative evaluation of different fixation techniques for sagittal split ramus osteotomy in 10 mm advancements. Part two: Finite element analysis.

Purpose: To evaluate three rigid, stable fixation methods for sagittal split ramus osteotomy (SSRO), using finite element analysis. The hypothesis is that a customized miniplate presents better stress concentration and distribution.

Materials And Methods: A 3D model of a hemimandible was created, and a 10-mm-advancement SSRO was simulated and fixed as follows: 3-DCP group - one custom miniplate fixed by eight screws; 4-H2P group - two miniplates of four holes each, fixed by eight screws; and 6-H2P group - two miniplates of six holes each fixed by 12 screws.

Comparative evaluation of different fixation techniques of the sagittal split ramus osteotomy in 10 mm advancements: Mechanical testing and screw insertion torque.

Purpose: To compare the mechanical characteristics of five techniques for the functionally stable fixation of simulated sagittal split ramus osteotomy with 10 mm of advancement and to evaluate the screw insertion torque.

Materials And Methods: Fifty polyurethane hemimandibles with sagittal split ramus osteotomy and containing an advancement of 10 mm fixed and distributed as follows: Customized 3D Plate Group: 1 customized 3D miniplate; 4-Hole Plate Group: 2 miniplates with 4 holes; 6-Hole Plate Group: 2 miniplates with 6 holes; Hybrid Group: 1 flat miniplate with 4 holes and 1 bicortical screw; and Bicortical Screw Group: 3 bicortical screws. We conducted a mechanical test using vertical linear loading with a displacement velocity of 1 mm/min on a universal testing machine and assessed the screw insertion torque using a digital torque wrench.

Comparison of instruments used to select and classify patients with temporomandibular disorder.

Unlabelled: The aim of the present study was to identify the relationship among instruments used to screen and diagnose temporomandibular disorders (TMD). A retrospective study was conducted using medical records of patients with temporomandibular disorder who had visited the institution for initial assessment between January and December 2015. Medical history and physical examination data were collected, particularly those focusing on the diagnosis of TMD and TMJ (temporomandibular joint) function.

Self-medication Among Myofascial Pain Patients: A Preliminary Study.

Background: Self-medication has been reported as an option which people choose to relieve the suffering of conditions that cause pain, however, this could delay the correct diagnosis and therapy.

Objective: The aim of the present study was to determine the prevalence of self-medication among patients with Temporomandibular Disorder (TMD), and to analyze correlations with the severity of the disease.

Methods: A prospective study was conducted with patients who had been diagnosed with TMD.

Condylar Hyperplasia in a Monozygotic Twin Girl: An Argument About Etiology.

The diagnosis of unilateral condylar hyperplasia (UCH) requires a combined assessment consisting of clinical, radiological, and histopathological examination. The etiology of this condition is unknown. The purpose of this study is to report a rare case of UCH in a monozygotic twin.

Evaluation of Failed Implants by Metallographic and Energy Dispersive X-ray Analysis.

Objective: To evaluate the microscopic structure and chemical composition of titanium dental implants removed from patients with implant failure.

Materials And Methods: Thirty-eight dental implants removed from 29 patients between January 2012 and September 2014 were studied by metallographic analysis, and 7 of these implants were also studied by energy-dispersive x-ray (EDX) analysis. Medical records of these patients were examined.

Mechanical evaluation of the use of conventional and locking miniplate/screw systems used in sagittal split ramus osteotomy.

Objectives: The aim of this study was to compare the mechanical resistance of four different osteosyntheses modeled in two different sagittal split ramus osteotomy (SSRO) designs and to determine the linear loading in a universal testing machine.

Materials And Methods: An experiment was conducted with 40 polyurethane hemimandibles. The samples were divided into two groups based on osteotomy design; Group I, right angles between osteotomies and Group II, no right angles between osteotomies.

Stability of the prosthetic screws of three types of craniofacial prostheses retention systems.

Objectives: This study aimed to evaluate the stability of prosthetic screws from three types of craniofacial prostheses retention systems (bar-clip, ball/O-ring, and magnet) when submitted to mechanical cycling.

Materials And Methods: Twelve models of acrylic resin were used with implants placed 20 mm from each other and separated into three groups: (1) bar-clip (Sistema INP, São Paulo, Brazil), (2) ball/O-ring (Sistema INP), and (3) magnet (Metalmag, São Paulo, Brazil), with four samples in each group. Each sample underwent a mechanical cycling removal and insertion test (=0.

Retention and Mechanical Behavior of Attachment Systems for Implant-Retained Auricular Prostheses.

Objective: Auricular prostheses are artificial substitutes for facial defects. The retention of these has often been a problem. This study aimed to evaluate the mechanical behavior of 3 retained auricular prosthetic connections when submitted to a mechanical cycling test.

Comparative Evaluation of Condylar Volume Between Patients With Unilateral Condylar Hyperplasia and Class III Dentofacial Deformity.

Purpose: To compare the condylar volume of patients with unilateral condylar hyperplasia (UCH) with that of patients with a Class III skeletal relation.

Materials And Methods: Twenty cone-beam computed tomograms of patients were analyzed. Images were divided into 2 groups: 10 from patients with transverse asymmetry of the face and 10 from patients with a Class III facial deformity.

Removal of a Solitary Synovial Chondromatosis of the Temporomandibular Joint Using Arthroscopy.

The diagnosis of synovial chrondromatosis of temporomandibular joint (TMJ) requires a combined assessment consisting of clinical, radiologic, and histopathologic examinations. The purpose of this study is to report in 1 patient the removal of a single large cartilaginous nodule floating in the upper joint compartment using arthroscopy. A 30-year-old woman was referred to our department complaining about pain in preauricular area and restricted mouth opening.

Characteristics of Maxillofacial Trauma Among Alcohol and Drug Users.

The aim of the current study was to identify and compare the characteristics of maxillofacial trauma in alcohol and drug users with those of nonusers. A retrospective study was conducted using the medical records of patients treated for facial trauma between April 1999 and March 2012 at the Maxillofacial Surgery Division of the Piracicaba Dental School. The data were analyzed by descriptive analysis, binary logistic regression, and correlational analysis using SPSS 18.

Development of a Titanium Plate for Mandibular Angle Fractures with a Bone Defect in the Lower Border: Finite Element Analysis and Mechanical Test.

Objectives: The aim of the present study was to develop a plate to treat mandibular angle fractures using the finite element method and mechanical testing.

Material And Methods: A three-dimensional model of a fractured mandible was generated using Rhinoceros 4.0 software.

What is expected from a facial trauma caused by violence?

Objectives: The aim of this retrospective study was to compare the peculiarities of maxillofacial injuries caused by interpersonal violence with other etiologic factors.

Material And Methods: Medical records of 3,724 patients with maxillofacial injuries in São Paulo state (Brazil) were retrospectively analyzed. The data were submitted to statistical analysis (simple descriptive statistics and Chi-squared test) using SPSS 18.

Piezosurgery in Bone Augmentation Procedures Previous to Dental Implant Surgery: A Review of the Literature.

The piezosurgery has been used with increasing frequency and applicability by health professionals, especially those who deal with dental implants. The concept of piezoelectricity has emerged in the nineteenth century, but it was applied in oral surgery from 1988 by Tomaso Vercellotti. It consists of an ultrasonic device able to cut mineralized bone tissue, without injuring the adjacent soft tissue.

[Psychosocial aspects in the rehabilitation of patients with anophthalmic socket: implications of the use of ocular prosthesis].

Unlabelled: Facial integrity is a condition which interferes in the daily life of the individual. The loss of an eyeball has psychological impact, requiring adaptation. Interventions such as prosthetic repair seem to lead to emotional and behavioral change.