The importance of correct diagnosis in complete dentures treatment.

A 68 years edentulous female, wearing unsuccessful complete dentures, was treated by making a new set of dentures. The main initial complains were unaesthetic teeth, excessive gums display, speech impairment and severe difficulties in mastication. With the patient's full collaboration and following sound established prosthodontics principles, a successful set of full dentures was provided. The main changes performed with the new set of dentures were: A. Provision of three millimeters interocclusal rest space between the vertical dimension while in occlusion and the vertical dimension of rest. B. The full anterior and premolars maxillary teeth and the incisal's third of the mandibular anterior teeth were displayed when patient was speaking, smiling and laughing. No artificial gums were displayed during any normal facial or oral activities. C. The occlusal plane was established after the selection of the anterior teeth. The plane was made parallel to the ala tragus (Camper's) line.

A forensic identification case and DPid - can it be a useful tool?

OBJECTIVE: The aim of this study was to show DPid as an important tool of potential application to solve cases with dental prosthesis, such as the forensic case reported, in which a skull, denture and dental records were received for analysis. MATERIAL AND METHODS: Human identification is still challenging in various circumstances and Dental Prosthetics Identification (DPid) stores the patient's name and prosthesis information and provides access through an embedded code in dental prosthesis or an identification card. All of this information is digitally stored on servers accessible only by dentists, laboratory technicians and patients with their own level of secure access. DPid provides a complete single-source list of all dental prosthesis features (materials and components) under complete and secure documentation used for clinical follow-up and for human identification. RESULTS AND CONCLUSION: If DPid tool was present in this forensic case, it could have been solved without requirement of DNA exam, which confirmed the dental comparison of antemortem and postmortem records, and concluded the case as a positive identification.

[The registration of false teeth and the others].

The quality control of false teeth should include the control for designing and processing. The registration of false teeth should emphasize particularly on the qualification of the makers, technology management, quality control and the labeling.

Stress analysis of a complete maxillary denture under various drop impact conditions: a 3D finite element study.

Complete maxillary dentures are one of the most economic and easy ways of treatment for edentulous patients and are still widely used. However, their survival rate is slightly above three years. It is presumed that the failure reasons are not only due to normal fatigue but also emerge from damage based on unavoidable improper usage. Failure types other than long-term fatigue, such as over-deforming, also influence the effective life span of dentures. A hypothesis is presumed, stating that the premature/unexpected failures may be initiated by impact on dentures, which can be related to dropping them on the ground or other effects such as biting crispy food. Thus, the behavior of a complete maxillary denture under impact loading due to drop on a rigid surface was investigated using the finite element method utilizing explicit time integration and a rate-sensitive elastoplastic material model of polymethylmethacrylate (PMMA). Local permanent deformations have been observed along with an emphasis on frenulum region of the denture, regardless of the point of impact. Contact stresses at the tooth-denture base were also investigated. The spread of energy within the structure via wave propagation is seen to play a critical role in this fact. Stress-wave propagation is also seen to be an important factor that decreases the denture's fatigue life.

Low dietary quality among older adults with self-perceived ill-fitting dentures.

OBJECTIVE: To examine dietary quality and nutrient intakes of participants wearing dentures with and without poor fit as determined by questionnaire and dental exam. DESIGN: Nutrient intakes, Healthy Eating Index (HEI) score, and serum nutrient values were examined among individuals wearing either adequate- or poor-fitting dentures and individuals who had at least 18 teeth. SUBJECTS/SETTING: Data was collected from 4,820 participants in the Third National Health and Nutrition Examination Survey ages 50 years and older with at least 18 teeth (n=3,207) or those wearing dentures (n=1,613), who responded to a questionnaire about denture fit and had their dentures evaluated by a dentist. STATISTICAL ANALYSES PERFORMED: Analysis of covariance and multivariate linear regression analyses were used to examine associations between individuals fully dentate, wearing good-or ill-fitting dentures, and nutritional status indicators. RESULTS: The group with self-perceived ill-fitting dentures compared with the group with natural teeth had significantly lower total HEI (66.5 vs 68.5 P<.002), vegetables (6.3 vs 6.8 P<.01), and variety scores (7.8 vs 8.2 P<.02); lower ascorbic acid (P<.009) and carotene intakes (P<.004). The group with self-perceived good-fitting dentures did not differ significantly from the dentate group. However, both groups wearing dentures had significantly lower serum levels of vitamins C and E, beta carotene, folate, lutein, and lycopene/zeaxanthin compared with the dentate group. APPLICATIONS/CONCLUSIONS: Dietary quality and intake of certain nutrients was poorer among the group with self-perceived ill-fitting dentures than among those wearing adequate dentures or those with natural teeth. Administering a simple questionnaire to patients about their perceptions of denture fit may be useful in identifying denture wearers at increased risk of dietary inadequacy.

Reproducibility of an assessment scale of denture quality.

Assessment of denture quality is important in prosthetic research. The aim of this investigation was to determine the intra- and interexaminer reliability of denture quality assessment. Three groups of patients with full maxillary and mandibular dentures and two dentists participated. The patients in group 1 (n = 195) were examined by the two dentists independently, in group 2 (n = 35) twice by one of the dentists and in group 3 (n = 20) twice by the other dentist. A denture quality scale was constructed containing nine variables. The internal consistency (coefficient alpha) of this scale was 0.60. The intra- and interexaminer reliability was between 0.59 and 0.86. For individual items of this scale these values were between 0.22 and 1.00.

Product quality and the dental surgeon.

Never has the word 'quality' been used so much as it is today. We are continually lectured about the need for quality, quality in what we make, what we buy, in services we give, quality of our environment, even quality of life. The meaning of the word is broadly the same and yet in detail it can mean a lot of different things--or even nothing at all.

The integration of technical services into dental restorative procedures.

A protocol for improved dentist-laboratory relations is presented. The mutual responsibilities and obligations of dentist and technician are outlined. Each step of the procedure is developed and projected at the level of case planning and diagnostic wax-up.

Provision of removable denture prosthesis at a university teaching hospital in Kenya.

OBJECTIVE: To compile an audit of removable denture prosthesis fabricated for patients attending a teaching clinic. DESIGN: A retrospective analysis. SETTING: Division of Prosthetic Dentistry, Faculty of Dental Sciences, University of Nairobi, Nairobi, Kenya. METHOD: Clinical records of the patients attended to in the prosthetic teaching clinic from 1993 to 1997 inclusive were analysed to extract information regarding the quality of clinical notes and the pattern of provision of prostheses. RESULTS: A total of 817 patients were provided with dentures of whom 602 were provided with complete upper and lower dentures. Single complete dentures were fabricated for 18 patients and 197 patients had partial dentures fabricated. CONCLUSION: While the number of prostheses provided may be in conformity with the unit resources, clinical notes were found to have significant omissions for which recommendations have been suggested.

Alloys for crown and bridgework.

The requirements of alloys for metal-ceramic crowns and bridgework are examined. The functional requirements and manipulative behaviour and cost of cheaper alternatives to high gold alloys are discussed. All types use--high gold, reduced gold, silver palladium and base metal--appear to function satisfactorily in the mouth. Nickel and beryllium do not appear to be health hazards. Dental laboratory procedures and materials must be chosen to suit the type of alloy employed, although all alloy types appear suitable for crown and bridgework. The cost of alloy must be carefully examined in the context of total cost to the patient, and the use of alternatives to gold alloys in many cases may not warrant the required changes to laboratory procedures, but the saving is real, and can make permanent restorations available to greater proportion of the community.

[Prosthetic management following submucous vestibuloplasty]. / Die prothetische Versorgung nach submuköser Vestibulumplastik.

20 patients who had been treated with a submucous maxillary vestibuloplasty were examined 1 to 3 years postoperatively. The postoperative result of surgery and the prosthetic conditions were evaluated according to fixed criteria by a maxillofacial surgeon and a prosthodontist. From the prosthetic point of view, the postoperative result was good in 15 cases, sufficient in 2 cases and, due to false diagnoses, unacceptable in 3 cases. 13 patients were completely satisfied by the postoperatively inserted dentures, 6 were only partially satisfied and 1 person was dissatisfied. Although 13 patients were satisfied, only 10 dentures were without significant defects.

[Hydrogen peroxide, chloramine T and chlorhexidrine in the disinfection of acrylic resin]. / Woda utleniona, chloramina T i dwuglukonian chlorheksydyny jako srodki do odkazania tworzywa akrylowego.

The effectiveness of 3% h drogen peroxide, 5% chloramine T and 0,5% chlorhexidine gluconate solutions in disinfection of acrylic resine plates massively infected with oral flora was analysed. The acrylic resine plates used for investigations, were infected in vitro with mixed salivary flora characterized by small numbers of yeast-like fungi (1st group), or great number of these microorganisms (2nd group). Infected plates were exposed to solutions of analysed disinfectants during various time periods. After rinsing or inactivation of disinfectant residues, acrylic plates were put into bacteriological medium and incubated during 7 days period in 37 degrees C. The results of this study indicated the effectiveness of acrylic plates disinfection to be dependent on used disinfectant, time of exposition, and microorganisms present on the surface of acrylic resine. The solutions of disinfectants were less active in the cases of plates infected with material containing great numbers of yeast-like microorganisms. Among analysed disinfectants 0,5% solution of chlorhexidine was characterized by most effective and rapid activity, whereas 3% solution of hydrogen peroxide was found to be the least effective.

[The stomatologic polishing machine ShM-03]. / Shlifmashina stomatologicheskaia ShM-03.

Herein is introduced a new machine dedicated to the treatment of the metal dentures, ceramics and hard alloys, which allows the patient's treatment in Stomatological Polyclinics. The design of the major parts of the machine--treatment unit and electronic control unit are described. Herein are described in details operation instructions, interlocks information of the unit that allows to extend the life of the motor and of some other electric circuit devices. The advantages of this new machine compared to the alternative Soviet manufactured unit are marked here. Introduction of this machine into production will help to introduce chromium-Cobalt alloys, ceramics and other materials of the heightened hardness into dental prostheses practice.

[Prosthesis treatment of nursing home residents. New prosthesis preparation or improvement of existing one?]. / Prothetische behandeling van verpleeghuisbewoners. Nieuwe prothese vervaardigen of de bestaande verbeteren?

From a clinical point of view one should show restraint in preparing new dentures for elderly people. It is advised to improve existing dentures. This research project shows that both treatments in elderly, somatically handicapped, nursing home residents do not diminish their complaints and dissatisfaction. Obviously, they are best served by a problem-centred treatment.

[Simulation of pigmented mucosa in complete dentures: development of an oral pigment index]. / Simulatie van de gepigmenteerde mucosa in gebitsprothesen: ontwikkeling van een classificatie.

In the non-Caucasian population the skin and oral tissues show pigmentation to a variable degree, but much more than in Caucasian. When a person becomes edentulous, the tissues containing oral pigmentation disappear. The patient's ethnic background gives no information to predict the characteristics of individual oral pigmentation; other sources have to be found. The mucosal pigmentation of 106 non-Caucasian, dentate people in Amsterdam and Los Angeles was investigated; a classification-chart of oral pigmentation with six types was designed. This tool makes it possible to help patient, dentist and dental technician to choose an accurate simulation of the contour of oral pigmentation in a denture. It is recommended to document the individual pigmentation before extractions are performed.

Implementation of a laboratory quality assurance program: the Louisville experience.

Remakes, or the refabrication of dental prostheses, can occur as a result of inherent inaccuracies in both clinical and laboratory procedures. Because dental schools manage large numbers of predoctoral dental students with limited familiarity and expertise as related to clinical prosthodontic techniques, it is likely these schools will experience an elevated incidence of laboratory remakes and their ramifications. The University of Louisville School of Dentistry, not unlike other dental schools, has experienced remakes associated with both fixed and removable prosthodontic procedures. Limitations in faculty standardization and variable enforcement of established preclinical protocols have been identified as variables associated with the high percentage of remakes documented. The purpose of this study was to introduce the implementation of a new multidepartmental quality assurance program designed to increase consistency and quality in both information provided to commercial dental laboratories and the prostheses returned. The program has shown to be advantageous in terms of cost-effectiveness and treatment outcomes. A statistically significant decrease in remake percentages has been recorded from inception of this program in December 2010 until December 2012. Furthermore, this program has resulted in more consistent communication between the dental school and commercial dental laboratories, among faculty members, and between faculty and students.

A forensic identification case and DPid - can it be a useful tool?

Abstract Objective The aim of this study was to show DPid as an important tool of potential application to solve cases with dental prosthesis, such as the forensic case reported, in which a skull, denture and dental records were received for analysis. Material and Methods Human identification is still challenging in various circumstances and Dental Prosthetics Identification (DPid) stores the patient's name and prosthesis information and provides access through an embedded code in dental prosthesis or an identification card. All of this information is digitally stored on servers accessible only by dentists, laboratory technicians and patients with their own level of secure access. DPid provides a complete single-source list of all dental prosthesis features (materials and components) under complete and secure documentation used for clinical follow-up and for human identification. Results and Conclusion If DPid tool was present in this forensic case, it could have been solved without requirement of DNA exam, which confirmed the dental comparison of antemortem and postmortem records, and concluded the case as a positive identification.