A solid bar splint for open-tray implant impression technique.
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Acrylic Resins↗
Biomedical subjects
Robert F Wright
Publications and source records attributed to Robert F Wright.
Accurate location of postpalatal seal area on the maxillary complete denture cast.
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Denture Bases↗
Osseointegrated craniofacial implants in the rehabilitation of orbital defects: an update of a retrospective experience in the United States.
STATEMENT OF PROBLEM: Since their introduction, craniofacial implants have been used in prosthetic rehabilitation of facial defects. The literature, however, indicates marked variability in outcomes using implants for the retention of orbital prostheses. PURPOSE: A multicenter report updating the experience in the United States with the use of craniofacial implants for prosthetic rehabilitation of orbital defects is presented. MATERIAL AND METHODS: Surveys were sent to clinicians at 25 centers where maxillofacial prosthetic treatment is provided to obtain retrospective data regarding patients who completed implant-retained orbital prosthetic rehabilitation. Data on implant placement location, radiation treatment history, and use of hyperbaric oxygen therapy were collected and assessed in relationship to implant survival over time. The Kaplan-Meier life table and Wilcoxon analyses (alpha = .05) were used to assess the significance of the findings. RESULTS: Ten centers responded, providing data suitable for statistical analysis on 153 implants placed to retain 44 orbital prostheses and followed for a mean period of 52.6 months. Forty-one implant integration failures occurred during this follow-up period, resulting in an overall integration survival rate of 73.2%. No significant relationship was found between radiation treatment history, hyperbaric oxygen therapy history, or implant placement location and implant survival. Individual responses revealed large variability between reporting centers in treatment outcomes. CONCLUSION: Craniofacial implants may offer marked benefits in the prosthetic rehabilitation of orbital defects when compared to conventional adhesive retention designs. However, questions remain regarding long-term predictability and the impact specific factors may have on treatment outcomes. Insufficient data is currently available from which to draw statistically meaningful conclusions. The establishment of a national database designed to acquire adequate data to assess treatment outcomes is recommended.
Adolescent↗
Effect of implant size and shape on implant success rates: a literature review.
Understanding and using biomechanical theories that effect endosseous implant design may improve the performance of implants in varying load conditions and allow the clinician to better apply this information with potentially improved success rates. The following article presents information from English peer-reviewed journals identified by a Medline search covering the years from 1974 through 2004, and attempts to integrate information available in the dental literature and address current controversies and issues in selecting diameter, length, and shapes of dental implants.
Biomechanical Phenomena↗
Shortened dental arch: a review of current treatment concepts.
It is generally assumed that dentition has ceased to be a predominant selection factor in the process of human evolution. With differentiation and reintegration of the human species, gross differences in the morphology and physiology of the stomatognathic system have become apparent. Variability and adaptation of this system have proven that deviations from what may be considered ideal are not pathologic but may, in fact, prove to be a range of normality in this general pattern of evolution. The treatment of patients according to inflexible postulates may be detrimental to the individual patient and the concept of a variable and patient-specific optimal dentition should be considered, especially in the context of the shortened dental arch.
Animals↗
In practice evaluation of a denture adhesive using a gnathometer.
PURPOSE: This study measured the extent to which the performance of a maxillary complete denture can be improved with the use of a denture adhesive. This in-practice evaluation assessed both a quantitative measure (force until dislodgement), without and with the adhesive, and patients' perception regarding the use of adhesive. MATERIALS AND METHODS: A total of 194 patients (77 men, 117 women) who wore maxillary complete dentures were tested for denture performance both without and with denture adhesive. A simple gnathometer was used. Patient perceptions were also assessed by a questionnaire and analyzed for denture performance as well as the effects on speaking and chewing, fit and comfort, and perceived confidence. RESULTS: There was a 63.4% improvement in bite force dislodgement with the use of a denture adhesive. A total of 79.2% of the patients perceived better denture performance (bite force dislodgement) with adhesive use. A total of 55.7% perceived an improvement in speaking and chewing. A total of 56.2% noticed the fit and comfort were better. A total of 63.9% responded that they had improved confidence. CONCLUSIONS: Use of a denture adhesive can improve the incisal (or protrusive) biting force for patients who wear a maxillary complete denture. Subjectively, the patients reported an improved perception of denture performance and that the use of adhesive provided greater confidence when using the prosthesis.
Aged↗
The U.S. infant formula industry: is direct-to-consumer advertising unethical or inevitable?
Throughout their history, U.S. based infant formula companies have promoted their products as though they required a prescription. This form of marketing is called "ethical" promotion, which focuses on gaining a physician to parent recommendation for a brand of infant formula. Until Nestle's entry into the U.S. infant formula market in 1988, there was little direct-to-consumer promotion of infant formula. This article provides a background on the history of infant formula practices in the United States and then focuses on a descriptive model to explain how mothers' make their infant formula selection. Finally, we offer suggestions for the "ethical" marketers of infant formula.
Advertising↗
Use of stereolithographic templates for surgical and prosthodontic implant planning and placement. Part I. The concept.
Surgical and prosthodontic implant complications are often an inadvertent sequelae of improper diagnosis, planning, and placement. These complications pose a significant challenge in implant dentistry. Presented in this article is a technique using a highly advanced software program along with a rapid prototyping technology called stereolithography. It permits graphic and complex 3D implant simulation and the fabrication of computer-generated surgical templates. These templates seat directly on the bone and are preprogrammed with the individual depth, angulation, and mesio-distal and bucco-lingual positioning of individual implants as planned during the 3D computer simulation.
Computer Simulation↗
Use of stereolithographic templates for surgical and prosthodontic implant planning and placement. Part II. A clinical report.
Eight implants were placed in the posterior part of the mandible using computer-generated stereolithographic templates. Preoperative implant simulation was done on a 3D computer model created by reformatted computerized tomography data. The surgeon and the prosthodontist positioned the simulated implants in the most favorable position addressing all concerns with regard to anatomy, biomechanics, and esthetics. The length and diameter of each implant along with the angulation/collar of abutments required for a screw-retained prosthesis were determined. Stereolithographic templates were then fabricated by incorporating the precise spatial position of the implants within the bone as previously planned during the computer simulation. The templates were fabricated to seat directly on the bone and were stable. The first template was used to complete osteotomies with a 2-mm twist drill followed by the second template for the 3-mm drill. Implants were placed and allowed to integrate for 4 months. After second-stage surgery, the definitive abutments were torqued into place followed by insertion of the definitive screw-retained prostheses. Dimensions of all implants and abutments were the same as planned during the computer simulation.
Aged↗