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PubMed2001

The dental student as a technician: preclinical and clinical laboratory programs in fixed prosthodontics.

PURPOSE: A 2-part survey of United States dental schools was conducted. The first part of the survey was published in 1998 and determined the curricular structure, techniques taught, and materials used in predoctoral fixed prosthodontics courses. The purpose of the second part of the survey was to ascertain the delegation of laboratory procedures in preclinical and clinical fixed prosthodontic programs. MATERIALS AND METHODS: The survey was mailed to the course directors of predoctoral fixed prosthodontic programs at 53 US dental schools. Of these, 42 schools returned the completed survey, resulting in a response rate of 79%. RESULTS: Results from this survey show that certain laboratory procedures in preclinical and clinical fixed prosthodontics are completed by dental laboratories (either in-house or commercially available laboratories). CONCLUSIONS: For the preclinical programs of fixed prosthodontics, there is more student involvement in the completion of laboratory procedures in the dental schools surveyed. In clinical fixed prosthodontic programs, there is a high emphasis on patient care and less on laboratory techniques that can be delegated to laboratory technicians.

Crowns↗

PubMed2006

[Regenerative medical therapy and prosthodontics].

The relation between prosthodontics and regenerative medical therapy was taken up as a theme at symposiums in the 112th and 113th scientific meeting of Japan Prosthodontic Society. In this article, these two symposiums are summarized, and academic conference presentations in the scientific meeting of Prosthodontic Society and the content of scientific papers published in the past 21 years are listed by theme, and how the academic society members had worked on themes such as basic medical research and regenerative medical therapy are verified. As a result, it is clarified that reports on biological research and research of regenerative medical therapy carried out from the prosthodontic viewpoint have increased in recent years. However, reports concerning biological findings on dental implants have not increased. It is shown that we have to think about the future direction again regarding the relations with recent regenerative medical therapy. In addition, the necessity of regenerative medical therapy in prosthodontic studies in the future is discussed including some personal opinions. The theme on which we have worked to date is not necessarily far from regenerative medical therapy, and research in the prosthodontic field will contribute to the development of regenerative medical therapy greatly if we appropriately adopt its concept and techniques. I hope that this article will have a good influence on the direction of research of academic society members, especially young members in the future.

Dental Implants↗

PubMed2006

[Skills Improvement Seminar for Submitting Articles to the Prosthodontic Research & Practice Journal. Part I. Guidelines for manuscript submission].

In the scientific meetings of the Japan Prosthodontic Society, many high-level research presentations are given, and yet a large proportion of the presentations have not been published. Since 2002, the Japan Prosthodontic Society has published PRP (Prosthodontic Research & Practice), which is the official English journal of the Society, to introduce scientific data of research in the field of prosthodontics internationally. PRP will be published quarterly from 2006. The editorial committee of the Japan Prosthodontic Society tries to give advice to authors, and to publish the prepublication paper in the PRP journal not as a rejection but as a correction. In order to give members of the Japan Prosthodontic Society a better understanding of the PRP journal, we held a Skills Improvement Seminar for Submitting Articles to the PRP at the 114th scientific meeting (Niigata) and the local branch scientific meetings. This paper summarizes the first half of the seminar and describes the editing work of PRP.

Guidelines as Topic↗

PubMed2004

Incidence of tooth loss and prosthodontic dental care: effect on chewing difficulty onset, a component of oral health-related quality of life.

OBJECTIVES: To quantify incidence of tooth loss, prosthodontic dental restoration, and chewing difficulty onset and the effect of tooth loss and prosthodontic restoration on chewing difficulty onset. DESIGN: A prospective cohort study of oral health and related behaviors with in-person interviews and clinical examinations conducted at baseline and 24 months. Telephone interviews were conducted every 6 months between these sessions. SETTING: A community-based sample of four counties in north Florida. PARTICIPANTS: Eight hundred seventy-three persons who had at least one tooth and were aged 45 and older at baseline. MEASUREMENTS: Persons were queried regarding onset of chewing difficulty, an important component of oral health-related quality of life (OHRQoL). The chewing index of Leake, with minor revision, was the primary outcome of interest. Tooth loss was measured using direct clinical examination. Dental care use was reported during each interview. RESULTS: Approximately 22% of participants reported tooth loss during follow-up. Fixed prosthodontics (crowns and bridges) was the most common form of new prosthodontic treatment. People who reported tooth loss were 2.7 times more likely to report chewing difficulty onset than people without tooth loss (P<.001). Having fewer occluding pairs of teeth at baseline was significantly associated with an increased probability of chewing difficulty onset. People who received removable prosthodontic treatment were much less likely to report chewing difficulty onset than people who did not (P<.01). CONCLUSION: Incident tooth loss and removable prosthodontic restoration strongly predicted chewing difficulty, an important component of OHRQoL.

Aged↗

PubMedDate not supplied

Mandibular overdentures: comparative evaluation of prosthodontic maintenance of three different implant systems during the first year of service.

PURPOSE: This prospective study evaluated the prosthodontic maintenance requirements during the first year of service of mandibular overdentures supported by two unsplinted implants using three different implant systems. MATERIALS AND METHODS: Seventy-two patients randomly allocated to three equal groups were each provided with a conventional complete maxillary denture and a mandibular overdenture supported by two unsplinted implants. A different implant system was used for each group (Steri-Oss, ITI, or Southern Implants), and their prosthodontic maintenance requirements were compared, primarily for the patrix and matrix. Additional maintenance categories recorded included any type of overdenture fracture, reline or remake of the overdenture, and maintenance of the maxillary denture. RESULTS: Sixty-eight percent of the patients, regardless of implant system, required prosthodontic maintenance in the first year, most commonly for the matrices. The Southern Implants matrices required less maintenance than those of Steri-Oss or ITI (P < .05). Additional overdenture maintenance was required by 28% of patients, irrespective of implant system. When all categories of prosthodontic maintenance were combined, there were no differences between implant groups. Evaluation of overall prosthodontic success using six-field tables revealed statistically significant differences between the three implant systems, with more ITI and Steri-Oss patients than Southern Implants patients requiring overdenture retreatment (repair). CONCLUSION: During the first year of service, the matrix maintenance requirements of Southern Implants were significantly lower than those of the ITI or Steri-Oss groups; this was reflected in the number of retreatment (repair) categories recorded. Although the three systems did not differ significantly for overall prosthodontic maintenance, both the Steri-Oss and the ITI titanium matrices showed problems of clinical significance.

Aged↗

PubMed2000

Assessment of MEDLINE search strategies for randomized controlled trials in prosthodontics.

PURPOSE: The purpose of this study was to evaluate the sensitivity, specificity, and precision of MEDLINE search strategies for detecting randomized controlled trials (RCTs) in prosthodontics. MATERIALS AND METHODS: A list of RCTs was obtained by hand-searching the International Journal of Prosthodontics, Journal of Prosthetic Dentistry, and Journal of Prosthodontics published between 1988 and 1997. RCTs identified served as the "gold standard" with which different MEDLINE search strategies were compared. Subject headings, keywords, MEDLINE checktags, publication types, and combinations thereof were used, and their results were compared with the "gold standard". RESULTS: Sensitivity ranged from 9% to 67%, specificity was at least 96% for all searches, and precision ranged from 22% to 59%. The most productive searches were by publication type clinical trial and publication type randomized controlled trial. Combining search terms did not improve sensitivity for detecting RCTs published in prosthodontic journals (p > .10). CONCLUSION: These findings support the need for more detailed reporting of trial methodologies to facilitate accurate indexing of prosthodontic articles in MEDLINE.

Humans↗

PubMed2005

[Epidemiology on the relationship between 8020 and clinical prosthodontics].

The tooth conditions of Japanese people have improved year by year, and it may be possible to achieve 8020 in the near future. On the other hand, over 40% of people had experienced prosthodontic treatment including dentures and bridges between the age of 45-54, and about 80% between the age of 65-74. Therefore, the rate of people who have a prosthodontic crown in their mouth are thought to be higher even in the young population. Prosthodontic treatment is important for recovering from severe defect of caries or for controlling occlusal trauma derived from malocclusion. However, it is difficult to manage prosthetically treated teeth for a long time in the oral environment because their treatments have been done for those who still have the risk of missing teeth. In this report, the relationship between achieving 8020 and prosthodontic treatment is discussed with the results of a study on extraction causes and the risks of prosthetically treated teeth. The results showed that the main cause of extraction of prosthetically teeth was periodontal disease, that 74.1% of the prosthetically treated teeth were non-vital, and that the prevalence of root fracture was different between vital and non-vital. These findings suggested that the comparison of the cause of missing teeth, especially, the risk of missing prosthodontically treated teeth, should be discussed after the standardization of periodontal conditions.

Aged↗

PubMed2006

[Skills Improvement Seminar for Submitting Articles to the Prosthodontic Research & Practice Journal. Part II. The manner to prepare and submit the scientific articles to English journal].

Over the last decade, research on prosthodontics has progressed and several academic associations and/or societies have been established. The number of journals published by the academic societies has increased. Prosthodontic Research & Practice (PRP), an official journal of the Japan Prosthodontic Society, was launched in 2002 and will be published quarterly from 2006. Most of the presentations in the scientific meetings of the Japan Prosthodontic Society have been buried, although the scientific quality and/or clinical values of some of them are relatively high. On the other hand, the reviewers of the scientific journal tend to review critically and severely, to maintain the quality of the journal. There are few review systems to improve the quality of the articles. Hence, the editorial board tries to make comments to improve the quality of submitted articles. This paper summarizes 'How to prepare scientific papers in English' as presented in the 'PRP Skills Improvement Seminar' at the 114th Scientific Meeting of the Japan Prosthodontic Society (Niigata).

Prosthodontics↗

PubMed2000

[The research of a multimedia consultative system for prosthodontics].

OBJECTIVE: To study how to develop the consultative multimedia system for prosthodontics facilitating the communication between the dentists and patients, using multimedia techniques. METHODS: The Founder Author Tools V2.1 was used to develop the consultative system in the Pwin95/98 environment. Many forms (such as the articles, pictures, sound and video) of the prosthodontic knowledge were edited in this system. RESULTS: The consultative multimedia system for prosthodontics was developed, and there were three main parts of the system: (1) the background of medical departments, (2) introductions of the medical specialists (including their photos and working time), (3) introducing the common acknowledge of prosthodontics. CONCLUSION: The visualization of the prosthodontic problems consulted by patients frequently can facilitate the communication between the dentists and patients and spare visit time. This system are welcome by the patients.

Communication↗

PubMed1982

Dental students' confidence in prosthodontics and attitudes toward the elderly.

Data were examined concerning dental students' confidence in removable prosthodontic treatment and their attitudes toward elderly persons before and after a ten-week clinical prosthodontic rotation. The Rosencranz and McNevin Aging Semantic Differential (SD) Scale was used to measure attitudes regarding the elderly; another SD was designed to measure confidence in removable prosthodontics. Both student's attitudes toward elderly persons and their confidence in carrying out removable prosthodontic treatment improved significantly after the rotation; the greatest improvement occurred when students treated patients of all ages. There was a significant relationship between confidence in performing removable prosthodontic treatment and clinical grades, but not didactic grades.

Aged↗

PubMed1991

Gingival enhancement in fixed prosthodontics. Part II: Microbiologic findings.

This study assessed the changes of the subgingival/marginal microflora during fixed prosthodontic procedures and evaluated the effect of adjunctive rinsing with 0.12% chlorhexidine on the subgingival/marginal microflora during fixed prosthodontic treatment. Thirty patients scheduled for fixed prosthodontics were randomly assigned to either rinsing with 15 ml of tap water b.i.d. (control) or rinsing with 15 ml of 0.12% chlorhexidine gluconate b.i.d. (experimental). Subgingival and marginal plaque was analyzed at baseline, before crown preparation (2 weeks), before crown cementation (5 weeks), and 2 weeks after cementation (7 weeks). The fixed prosthodontic procedures alone altered the subgingival and marginal microbiota toward a more health-associated flora. Adjunctive rinsing twice daily with 0.12% chlorhexidine had a significantly greater effect in reducing putative periodontal pathogens compared with the control regimen. This medication was a useful adjunct to regular oral hygiene during fixed prosthodontic procedures by permitting the establishment and maintenance of a microflora compatible with periodontal health.

Adult↗

PubMed2000

Prosthodontic considerations.

The prosthodontic section of the 1997 ITI Consensus Conference in Vitznau, Switzerland, examined a broad spectrum of issues related to the prosthodontic phase of dental implant therapy. Topics included diagnosis and treatment planning, considerations for the use of ITI prosthodontic components, management of the partially edentulous patient, management of the edentulous patient, implant occlusion, and the use of narrow- and wide-body implants. The management of partially and totally edentulous patients will be discussed in separate papers. This paper is written so that each major consensus point discussed by the prosthodontic section is the first sentence of a paragraph. The remainder of each paragraph serves as background information or justification for the consensus statement. It should be noted that agreement on all points was reached by voting within the prosthodontic section. Many of the consensus statements were reached unanimously, while some were reached through compromise and split vote. Not all of the points presented here were presented to the plenum session on the final day of the conference.

Cementation↗

PubMedDate not supplied

Strategies to achieve fit in implant prosthodontics: a review of the literature.

PURPOSE: This paper reviews the literature on advanced strategies that attempt to improve fit in implant prosthodontics with reference to the concept of the "distortion equation." MATERIALS AND METHODS: The majority of the articles reviewed were either clinical or technique articles that advocated strategies to improve fit in implant prosthodontics. A limited number of retrospective and prospective clinical trial studies were included as they related to the topic. Reviewed articles were limited to those that addressed advanced strategies to improve fit. All of the scientific studies included in this review used an in vitro experimental design. The advanced strategies were categorized into methods that address intraoral indexing and methods that use the implant master cast. RESULTS: Relatively few methods have been scientifically proven to improve fit in implant prosthodontics. Most of the tested strategies still resulted in a slight misfit of the frameworks to the implant abutments/analogues. CONCLUSION: Multiple factors preclude that the concept of "passive fit" can be achieved in implant prosthodontics, even with the use of advanced strategies. The use of meticulous, accurate implant prosthodontic procedures and the appropriate use of advanced strategies continue to be the recommended means of achieving precise fit of the implant prosthesis to the intraoral abutments.

Animals↗

PubMed2001

Analysis of occlusal contacts in different types of prosthodontic appliances, Eichner classifications, presence RCP-ICP slide and the type of occlusion.

The aim of the study was to determine the number and the type of the occlusal contacts (strong, weak) with respect to the type of the prosthodontic appliance (fixed, removable, combined fixed-removable) and with respect to the Eichner classification in patients with their appliances being in a good function for a long time. The aim of the study was also to determine the number and the type of the occlusal contacts (strong, weak) with respect to the type of occlusion (canine guided, group function or balanced) and the presence of the RCP-ICP slide. A total of 440 patients with different types of prosthodontic appliances were examined for the antagonistic occlusal contacts using occlusal strips of 11 microm and 50 microm. The average number of occlusal contacts was 10.5 for the upper and 10.46 for the lower posterior teeth, approximately 5 on each side of the tooth arch. The results of the study suggest that the biggest number of occlusal contacts were recorded for the small span fixed appliances (2 on average), the greater span fixed and fixed-removable prosthodontic appliances exhibited 1.6 occlusal contacts, and the removable complete denture exhibited 1.2 contact per the tooth in the posterior region. The number of the hard occlusal contacts was significantly greater in fixed and fixed-removable prosthodontic appliances in comparison with the complete dentures (p < 0.05), while there was no significant difference between the prosthodontic appliances for the weak occlusal contacts (p > 0.05). The overall number of the occlusal contacts, as well as the number of the hard occlusal contacts was significantly greater in the Eichner class I cases (p < 0.05) in comparison with the Eichner classes II and III. The number of the weak occlusal contacts showed no significant differences with respect to the Eichner classification (p > 0.05). There was no significant difference in the number of occlusal contacts between the appliances with RCP-ICP slide and where ICP and RCP corresponded (p > 0.05).

Dental Occlusion↗

PubMedDate not supplied

The outcome of implant overdentures from a prosthodontic perspective: proposal for a classification protocol.

PURPOSE: This article proposes a classification protocol for reporting the outcome of implant overdentures. MATERIALS AND METHODS: Review of the literature pertaining to postinsertion prosthodontic procedures for maxillary and mandibular implant overdentures revealed a wide range in the terminology used and methods of reporting outcome, usually as a result of the use of varying designs among different implant systems. A need for comparative evaluation of the prosthodontic success of implant overdentures was identified. RESULTS: An existing classification protocol for implant-fixed prostheses containing six objectively defined fields was modified for implant overdentures. This new protocol, which also uses the descriptive fields of success, survival, unknown, dead, and retreatment (repair or failure), provides a method whereby postinsertion prosthodontic procedures and subsequent time to retreatment can be quantified regardless of design, method of attachment, or implant system. A ratio method for identifying prosthodontic treatment cost effectiveness of implant overdentures is included. CONCLUSION: This protocol could assist clinicians in their choices of implant overdenture therapy by providing accurate comparisons of varying implant overdenture systems and designs, and by identifying prosthodontic treatment cost effectiveness.

Clinical Protocols↗

PubMed1992

Orthodontic adjunctive treatment in fixed prosthodontics.

The purpose of this article has been to increase the restorative dentist's appreciation for the rationale justifying preprosthodontic orthodontic treatment. It has not been intended to identify all the specific indications for the use of orthodontic treatment to enhance prosthodontic treatment nor has it been intended as a reference to assist the restorative dentist in placing and using orthodontic appliances. Figure 12 illustrates a typical case in which the combination of orthodontic and prosthodontic treatment resulted in a more favorable outcome than prosthodontic treatment alone. When planning prosthodontic treatment, the dentist should embrace a dynamic view of tooth position and determine whether restorative treatment can be enhanced by tooth movement. Improved tooth position can eliminate potentially pathologic occlusion and create a healthier periodontal environment that is easier to maintain. In addition, it permits the dentist to place restorations that often require less natural tooth reduction during preparation, and that are more esthetic, functional, stable, and durable. Orthodontic treatment that accomplishes these benefits may be limited to a partial fixed appliance localized to one segment of an arch or require a more extensive fixed appliance. Much of this treatment can be accomplished by the interested restorative dentist. Addressing more comprehensive orthodontic problems in patients requiring prosthodontic care is best managed through a restorative dentist and orthodontist team approach to treatment.

Dental Stress Analysis↗

PubMed1992

Some factors influencing the quantity of prosthodontic treatment performed by general practitioners in public dental service.

For general dentists in public dental service, Orebro county, the numbers of artificial crowns, pontics, RPD:s and CRD:s produced in 1989 were studied in relation to some background factors. The dentist-related factors were: gender, time in profession, working time per week, and place of graduation. Factors related to dental clinics were: location of the clinic, general prosthodontic activity at the clinic. Multiple regression analyses were used. Two different patterns were found; one for fixed prosthodontics, another for removable prosthodontics. Prosthodontic activity at the clinic, the male sex, and (inversely) time in profession were significantly associated with high production of artificial crowns and pontics. The regression models for removable prosthodontics showed no significance.

Crowns↗

PubMed2004

Reappraising prosthodontic treatment goals for older, partially dentate people: Part II. Case for a sustainable dentition?

The second of this two-part series, on the theme of estimating prosthodontic treatment needs and goals for older, partially dentate people, examines the roles of patient-perceived functional impairment, treatment outcome and changing demographic profiles in influencing these goals. In contradistinction with the lack of compelling evidence for the basis of the traditional, morphologically-driven prosthodontic treatment strategy, the evidence that the assessment of treatment need should take greater account of individuals' felt oral functional concerns, and thereby assuming a more problem-oriented, outcomes-based approach to prosthodontic decision-making, is gaining strength. Furthermore, the current blueprint guiding prosthodontic planning and procedures cannot be exempt from the far-reaching changes in society brought about by new economic and social realities, and will need to transform itself in the light of new evidence. How these realities translate in a developing country context is not certain, but it is known that inequalities in access to, and the provision of healthcare are related to socio-economic factors, be they prevailing or of residual nature from past structural conditions. Such conditions adversely affect peoples' health status and add urgency to the pursuit of viable and appropriate management strategies. In the context of a reappraisal of current prosthodontic paradigms, the shortened dental arch concept is presented as a potentially compelling strategy for the appropriate management of the ageing, partially dentate patients in South Africa, whose access to healthcare is inequitable. Since dental and oral health status is variable, the management strategy highlighted here should be seen as one, albeit an important one, within a range of available options.

Adaptation, Physiological↗