Publications by authors named "Christophe Rignon-Bret"
Article Synopsis
- This study compares the shock absorption performance of custom-made mouthguards produced by 3D printing, industrial methods, and thermoforming using standardized impact tests.
- The results showed that 3D-printed mouthguards provide better shock absorption than thermoformed EVA mouthguards and have less thickness variation after repeated impacts.
- Overall, 3D-printed mouthguards offer practical benefits for sports while being cost-effective and more durable compared to traditional mouthguard options.
Purpose: To determine whether digital training improves conceptual skills acquisition for custom tray fabrication and tooth arrangement in the preclinical curriculum for complete denture fabrication.
Materials And Methods: A crossover design study compared third-year student grades after conventional (manual) and digital training. Half the students were trained with conventional techniques prior to digital, while the other half were trained with digital techniques prior to conventional.
Purpose: To assess the implant survival rate in mandibles reconstructed with free fibula flap after oral tumor resection after 1 year of prosthetic loading. A secondary objective was to compare immediate or delayed implant placement protocols in this population.
Materials And Methods: Electronic and manual searches were performed on different databases for controlled and prospective trials that indicated implant survival rate.
Statement Of Problem: Cleft lip and palate are the most frequent congenital anomalies of the face and are often linked with lateral incisor agenesis. The therapeutic decision on whether and how to replace the lateral incisors is not straightforward, and a decision-making tree is needed.
Purpose: The purpose of this systematic review was to evaluate the available literature reporting on treatments for the replacement of missing lateral incisors in cleft areas.
Introduction: Advances in CAD-CAM complete dentures open up opportunities in preclinical laboratory education. A cross-over study was conducted to assess the benefit of digital training in custom tray fabrication. Hypotheses were that digital training improved conceptual skill acquisition and that assessment of digital work helps in the discrimination of students' difficulty.
View Article and Find Full Text PDFPurpose: To determine the effect of scanning protocol, number of implants, and implant splinting on the accuracy of digital scanning in the edentulous arch.
Materials And Methods: A resin-based model of an edentulous mandible with six implants was scanned with a coordinate measurement machine as a reference and then with two intraoral scanner (IOS) systems (Trios 3 and Primescan). Ten scans were taken per IOS for three experiments, and each scan was compared to the reference data to evaluate trueness and precision.
Statement Of Problem: Maxillary bone resorption after multiple extractions can jeopardize the success of an immediate denture, but whether bone volume preservation techniques are effective is unclear.
Purpose: The purpose of this randomized controlled trial was to evaluate the efficacy of socket grafting with a xenogenic bone substitute in participants receiving maxillary immediate removable complete dentures in terms of bone volume preservation (height and width of the bone ridge).
Material And Methods: The study was a single-blinded, randomized controlled clinical trial with 2 balanced parallel arms.
Statement Of Problem: Scanning of completely edentulous arches remains a challenge because of the large surface to scan and the lack of anatomic indexes. Whether the presence of impression transfer copings with digital scanning provides enough markers for acceptable precision and clinical use has not been determined.
Purpose: The purpose of this systematic review was to assess the accuracy of digital scanning for complete-arch implant-supported restorations.
Purpose: This 10-year retrospective study aimed to report implant bone changes in completely edentulous patients after a mandibular immediate loading protocol using two ball attachments.
Materials And Methods: This study was initially designed as a prospective 1-year cohort study, then extended with a 10-year retrospective evaluation of implant bone change. In the first part of the study, 43 edentulous patients wearing satisfactory maxillary and mandibular dentures for at least 3 months were included.
Statement Of Problem: The success of single, anterior, implant-supported restorations relies on mechanical and esthetic outcomes. Titanium has been the most commonly used material for abutments, but zirconia is increasingly chosen for its appearance despite its unclear mechanical performance. Today, manufacturers market prefabricated, computer-aided design and computer-aided manufacturing (CAD-CAM) custom and zirconia abutments with titanium connections.
View Article and Find Full Text PDFArticle Synopsis
- This study investigates the use of bone substitute material to improve bone preservation after the extraction of last teeth and placement of maxillary immediate complete dentures.
- Thirty-four participants were randomly assigned to either a control group receiving standard immediate denture treatment or an experimental group where a xenograft material was added to the extraction sockets.
- The primary outcome measured was bone ridge height loss after one year, with secondary outcomes assessing width loss and the effectiveness of a new imaging technique for accurate evaluation.
Purpose: This study compared tissue three-dimensional (3D) displacements during the material setting phase of two maxillary impression tray-holding techniques: clinician manual pressure and patient occlusal pressure.
Materials And Methods: The resultant two maxillary casts for each of 10 edentulous patients were compared using an optical 3D measurement system.
Results: The junction between the hard and soft palates acted like a rotation center during impression making.
Oral rehabilitation of adult patients with cleft lip and palate is related to the severity of the anatomical and functional alterations that hamper the proper closure of the nasopharynx. The ideal treatment is closure by bone graft and orthodontics. However, when surgery is not possible or when the patient does not wish to undergo surgery, a palatal prosthesis may offer the best solution in most clinical situations.
View Article and Find Full Text PDFA simple technique is presented to make a multipurpose duplicate of the patient's complete denture to plan and fabricate a mandibular implant-retained overdenture. This duplicate serves 3 different functions. It can be used as a radiographic guide, surgical template, and custom tray adapted to the patient's occlusion.
View Article and Find Full Text PDFObjectives: The needs of seniors for oral health and aesthetics are growing, as are their demands for aesthetics. This large-scale study aims to identify the demand for aesthetics for a population aged over 55, and the influence of age and gender.
Methods: A 15-item questionnaire was placed on the web in partnership with a major magazine dedicated to seniors.
Statement Of Problem: Little is known about tissue displacement at the tissue/denture base interface during impression making.
Purpose: This study used a new 3-dimensional measurement system to analyze and compare 2 complete denture reline impression techniques (1 occluding and 1 digital) to determine which resulted in less displacement of the tissue/denture base interface during impression making.
Material And Methods: The experiment included 10 completely edentulous subjects.