feldspar and Jaw--Edentulous--Partially

This article is part of a randomized clinical trial on different treatments in the shortened dental arch (SDA). It focused on the abutment tooth prognosis with cantilevered fixed dental prostheses (CFDPs).. Sixty-two patients with a bilaterally SDA up to the first or second premolar in the mandible or maxilla were evaluated. In 57 of 124 quadrants, second premolars were replaced by a CFDP (cantilever group). In the remaining 67 quadrants, a natural second premolar was present and thus no need for a CFDP was given (non-cantilever group). Patients were recalled annually up to 5 years.. The mean observation period was 56.3 months (min. 3.0, max. 76.2, SD 16.1). Kaplan-Meier survival rates concerning tooth loss and tooth fracture were 93.9%/94.0% in the cantilever group and 91.9%/92.8% in the non-cantilever group. Differences between both groups were not significant. The survival rate concerning loss of retention of CFDP retainers was 92.1% in the cantilever group.. After 5 years of clinical service, CFDPs for the replacement of the second premolar showed no negative impact on the abutment tooth prognosis.. Cantilevered fixed dental prostheses present a viable treatment option in the shortened dental arch without compromising the medium-term abutment tooth prognosis.

Topics: Adult; Aluminum Silicates; Bicuspid; Cuspid; Dental Abutments; Dental Arch; Dental Porcelain; Denture Design; Denture Retention; Denture, Partial, Fixed; Follow-Up Studies; Gold Alloys; Humans; Jaw, Edentulous, Partially; Mandible; Maxilla; Metal Ceramic Alloys; Potassium Compounds; Survival Rate; Tooth Fractures; Tooth Loss; Treatment Outcome

Few scientific reports regarding the success of complete mouth partial fixed dental prostheses frameworks fabricated with zirconia are available, especially when dental implants serve as the abutments. A complete mouth reconstruction with zirconia frameworks veneered with feldspathic porcelain is reported involving a 65-year-old white woman who presented with partial edentulism and an unrestorable remaining dentition. After examination, 14 implants were planned (8 in the maxillary arch and 6 in the mandibular arch), and implant-supported zirconia framework screw-retained partial fixed dental prostheses (ISZPFDPs) were fabricated and made in sections for easier retrievability and management. No major complications were encountered during follow-up appointments at 6-month intervals for 4 years. However, minor fractures of the veneering ceramic were noted 4 years after placement. The ISZPFDPs were well accepted by the patient and had a favorable outcome in terms of patient acceptability and success, despite some complications.

Topics: Aged; Aluminum Silicates; Computer-Aided Design; Dental Implants; Dental Materials; Dental Porcelain; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Dental Veneers; Denture Design; Denture, Partial, Fixed; Female; Follow-Up Studies; Humans; Jaw, Edentulous, Partially; Mandible; Maxilla; Patient Satisfaction; Potassium Compounds; Surface Properties; Treatment Outcome; Zirconium

Ectodermal dysplasia (ED) is a hereditary disorder characterized by the abnormal development of specific tissues and structures of ectodermal origin. This clinical report describes the multidisciplinary approach to the diagnosis and treatment of a 24-year-old patient with partial expression of ED. The treatment plan used dental implants to support fixed prostheses and ceramic restorations to establish acceptable esthetics and provide function.

Topics: Aluminum Silicates; Anodontia; Crowns; Dental Implantation, Endosseous; Dental Implants; Dental Porcelain; Dental Prosthesis, Implant-Supported; Dental Veneers; Denture, Partial, Fixed; Ectodermal Dysplasia; Esthetics, Dental; Humans; Jaw, Edentulous, Partially; Male; Mouth Rehabilitation; Patient Care Planning; Patient Care Team; Potassium Compounds; Vertical Dimension; Young Adult

To assess the influence of different crown-implant (C/I) ratios and implant dimensions on periimplant stress in the partially edentulous posterior mandible by 3-dimensional finite element analysis (FEA).. Two implants were placed in the second premolar and first molar regions of the mandibular model. The implants were then splinted with a 2-unit fixed bridge. The influence of 3 parameters (C/I ratio, implant length, and implant diameter) on periimplant bone stress was then analyzed by using FEA.. C/I ratios showed a direct relationship with periimplant bone stress, but the absolute height of the clinical crown had a much more significant influence. The implant length had less influence on the periimplant bone stress than the implant diameter. Lower stress values were detected in wide-diameter implants, even in scenarios involving long crowns.. Crown height is a more important factor affecting the periimplant bone stress than the C/I ratio for splinted implant-supported crowns. Two-unit fixed restorations with high C/I ratios may be successfully used with wide-diameter implants in the posterior mandible.

Topics: Aluminum Silicates; Bicuspid; Biomechanical Phenomena; Chromium Alloys; Computer Simulation; Crowns; Dental Implant-Abutment Design; Dental Implants; Dental Porcelain; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Denture, Partial, Fixed; Elastic Modulus; Finite Element Analysis; Humans; Image Processing, Computer-Assisted; Imaging, Three-Dimensional; Jaw, Edentulous, Partially; Mandible; Models, Biological; Molar; Potassium Compounds; Stress, Mechanical; Surface Properties

From diagnosis and treatment planning to the materials being used, technology is changing dentistry. New materials are providing dentists greater options for treatment, while technology is streamlining the workflow in the office and dental laboratory. Traditionally the creation of a long-span fixed partial denture was a labor intense project--from waxing up the prosthesis--to stacking of the porecelain. For larger frameworks, it was recommended for the dentist to bring in the patient in for a framework try-in. However, advances in both CAD/CAM technology and dental materials are revolutionizing the way dentistry is being done. The following describes the fabrication of a 10-unit full contour zirconia fixed partial denture completed in the pre-doctorate program at UTHSCSA Dental School.

Topics: Aluminum Silicates; Computer-Aided Design; Dental Impression Technique; Dental Materials; Dental Porcelain; Denture Design; Denture, Partial, Fixed; Esthetics, Dental; Female; Humans; Jaw, Edentulous, Partially; Mandible; Middle Aged; Patient Care Planning; Patient Satisfaction; Potassium Compounds; Technology, Dental; User-Computer Interface; Zirconium

To analyze the biomechanics of 3 designs of implant treatment for 3 teeth missing in posterior low arch quadrants.. A posterior portion of the human mandible missing 44, 45, 46 and three 4.1 × 10 mm threaded ITI implants with crowns were used to construct the finite element model. According to 3 implants being single, splinted or 2 implants support fixed partial denture (FPD) fixed in bone segments. Three implant support conditions were prepared with ANSYS 10.0. A load of 100 N was applied at the central fossa of the occlusal surfaces of the crowns at 45 degrees buccolingually along the triangular ridge of the buccal cusp. The von Mises stress and strain distributions in periimplant bone were observed.. The results demonstrated that the von Mises stress in the supporting bone of the 2-implant supported FPD significantly increased compared with that in the 3-implant replacement. Meanwhile, when 3 implants were splinted, only the median implant had a decreased and more homogenous stress distribution, and the other implants did not exhibit significant differences when splinted.. This study suggests that when space and cost permit, a 2-implant supported FPD should not be used, and 1 implant for each missing tooth being single is recommended.

Topics: Aluminum Silicates; Biomechanical Phenomena; Bite Force; Computer Simulation; Crowns; Dental Implants; Dental Materials; Dental Porcelain; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Stress Analysis; Denture Design; Denture, Partial, Fixed; Finite Element Analysis; Humans; Imaging, Three-Dimensional; Jaw, Edentulous, Partially; Mandible; Models, Biological; Patient Care Planning; Potassium Compounds; Stress, Mechanical; Titanium