Types Of Removable Partial Dentures Research Articles

Clinical evaluation of a one-piece polyetheretherketone removable partial denture fabricated using a novel digital workflow: A self-controlled clinical trial.

To explore the clinical application of one-piece polyetheretherketone (PEEK) removable partial dentures (RPDs) fabricated using a novel digital workflow and to evaluate their weights and fits in vivo and patient satisfaction. Fifteen cases with posterior partially edentulous situations were selected, and each patient received two types of RPDs, including a novel digital workflow (test group) and a conventional workflow (control group). For the test group, one-piece RPDs were designed through three-dimensional (3D) methods by scanning stone casts and fabricated by milling PEEK discs. Each RPD was weighed. The gaps between the oral tissue and RPDs in each group were duplicated using a polyvinylsiloxane (PVS) replica and measured by 3D analysis. A visual analog scale (VAS) was used to evaluate the patient's satisfaction. Paired t-tests were used to compare the differences in the weight, the gaps of each RPD, and VAS values between the two groups. One-way analysis of variance tests was used to compare the differences in the gap among different components in each group. The RPD in the test group weighed less than that in the control group (p<0.01). No statistically significant differences in the gaps of denture bases and rests (p>0.05) were found between the two groups, but the gaps of major connectors in the test group were significantly smaller than in the control group (p<0.05). The VAS scores for comfortableness and masticatory efficiency were not significantly different between the two groups (p>0.05) but the scores for the aesthetic appearance of the clasps in the test group were significantly higher than that in the control group (p<0.05). One-piece PEEK RPDs manufactured using a novel digital workflow weighed less than conventional RPDs and exhibited a clinically acceptable internal fit. Although the aesthetic appearance of the PEEK clasps was superior to the control, there is still room for improvement.

Kepuasan pasien di jakarta barat terhadap gtsl nilon termoplastik

disorders, and aesthetic function. Partial tooth loss can be overcome by using removable partial dentures (RPD). There are various types of removable partial dentures, one of which is made of thermoplastic nylon. Objectives: To describe patient satisfaction using thermoplastic nylon-based removable partial dentures in West Jakarta. Materials and Methods: a descriptive observational study using a cross-sectional method. 109 Respondent participated in this study. A Validated quesionnaire containing 20 questions was given via Google forms to measure patient satisfaction. Results: 20 questions that have passed the validity and reliability tests, the results show that the age group that uses the most nylon thermoplastic RPD is 36-45 years (42.2%). There were more female respondents than female respondents (67.49%). Most of the denture use time is less than 1 year (56%). The highest distribution of tooth loss was a combination of anterior and posterior teeth (42.2%), front of the maxilla (23.9%), back of the mandible (21.1%), back of the maxilla (11.9) and the least was the front of the mandible (0.9%) ). As many as (1.8%) were dissatisfied, 12.8% were satisfied, and 85.3% were very satisfied with their thermoplastic nylon removable partial denture. Conclusion: 93 respondents were very satisfied with their thermoplastic nylon removable partial dentures.

Postinsertion adjustment appointments and their association with cast removable partial denture survival

Statement of problemSuccessful outcomes with cast removable partial dentures (RPDs) are dependent on adequate fabrication and adjustments at the delivery appointment. Evaluation of the number and frequency of postinsertion follow-up appointments helps determine whether the prosthesis continues to fit comfortably and whether function and esthetics continue to be satisfactory. Reports on the number of appointments and frequency and type of adjustments required for RPDs following insertion are sparse. PurposeThe purpose of this university-based population study was to determine the number of appointments and type of adjustments following RPD insertion and their association with patient demographics, type of RPD, and denture survival. Material and methodsThis retrospective clinical study examined the records of 257 patients at the University of Toronto, Faculty Dentistry, wearing 308 RPDs inserted between 2013 and 2014 with a 5-year follow-up. The outcome measures investigated included postinsertion appointments, type of adjustments, and denture survival. ResultsA total of 48.1% of the dentures (19.5% tissue supported; and 28.6% tooth supported) were maxillary, and 51.9% (34.7% tissue supported; and 17.2% tooth supported) mandibular. Most patients (68.9%) had 1 to 3 postinsertion appointments, with 78.6% having no major adjustments. Twenty-six dentures failed (failure rate 8.4%), with the failure-free time estimated at 4.58 years (95% confidence interval (CI) 4.42-4.73 years, Kaplan-Meier survival analysis). Failed dentures were significantly associated with more minor adjustments (Mean (M)=4.12, SD=3.90, Kruskal-Wallis (K-W) P=.027; OR=1.18; 95% CI 1.05-1.32, P=.006). More minor adjustments were needed for mandibular dentures (multivariable Poisson regression (MPR) P=.003) compared with maxillary dentures. More major adjustments were needed for maxillary dentures (MPR P=.030) compared with mandibular dentures. More minor and major adjustments were needed for dentures that were remade from within 5 years to beyond 10 years compared with first time denture wearers (MPR P<.001). Patients with musculoskeletal disorders required a significantly higher number of minor adjustments (M=3.67, MPR P<.001) and appointments (M=3.87, MPR P<.001) than those without these disorders. ConclusionsThe 5-year survival of RPDs following insertion was estimated at 91.6%. Most patients required 1 to 3 appointments after insertion. Mandibular RPDs required significantly more minor adjustments, and maxillary RPDs more major adjustments. More minor and major adjustments were needed for dentures that were remade at any time previously compared with first time denture wearers.

Comparison of the impact of two types of removable partial dentures on the periodontal health of the remaining teeth: A prospective clinical study.

To evaluate and compare the impact of two removable partial dentures (acrylic removable partial denture [ARPD] and metallic removable partial denture [MRPD]) on periodontal tissues of the remaining teeth in the first 12 months of denture use. This prospective clinical study included 40 patients, of which 20 received ARPDs, 20 received MRPDs, nine in the maxilla, and 11 in the mandible each. The patients were 45-65 years old; 24 were females, and 16 were males. Patients' demographic details, clinical indicators of periodontal complications, and biochemical measurement of Hs-C-reactive protein (CRP) and alkaline phosphatase (ALP) were considered. One-way analysis of covariance and Friedman were used to measure the differences in clinical periodontal parameters between the two types of dentures. The significant findings were: Plaque index (PLAQ) scores for abutment teeth were higher in MRPD wearers (mean = 12.15) than ARPD wearers (mean = 10.45), whereas ARPD users had significantly higher mean bleeding on probing (BOP) values (mean = 1.5) than MRPD users (mean = 0.00); mobility of abutment teeth showed no significant differences; timeline comparisons showed a significant increase in the percentage of nonabutment teeth mobility in ARPD users (p = .028) compared with MRPD users over the same follow-up period (p = .102). For a short-term period of 1 year, periodontal and mobility parameters have no significant impact on the abutment and nonabutment teeth of ARPD and MRPD users. Moreover, biochemical markers (CRP and ALP) for periodontal inflammation exhibited no significant difference in both types of dentures.

A comparative evaluation of masticatory efficiency and satisfaction with different types of removable partial dentures: a pilot crossover randomized study

Aims: This study evaluated the subjective experience of masticatory performance and masticatory efficiency in partially edentulous patients rehabilitated with three different types of removable partial dentures (RPDs). Materials and methods: This was a crossover randomized study, which was carried out at the prosthodontics clinic of the University of Ghana Dental School clinic. Sixteen patients requiring RPDs but had never worn one before were consecutively recruited for the study. Three different RPDs [i.e., cobalt chromium, acrylic, and thermoplastic resin (iFlex)] were fabricated for each patient. Masticatory efficiency was assessed using a singlesieve method after chewing raw carrots. The subjective experience of masticatory performance was also assessed using a questionnaire after 1 week of using each denture. Results: The cobalt-chromium denture recorded the highest masticatory efficiency (31.4%), and the iFlex denture recorded the lowest (27.9%). Subjectively, the cobalt-chromium denture was ranked as the denture they were most satisfied with when chewing with the least being the acrylic denture. Conclusion: Despite the fact that the iFlex, flexible denture had an overall appeal, where effective chewing is of great concern to prospective RPD patients, the cobalt-chromium denture may have a slightly better advantage.

PERSPECTIVE OF DENTAL PROFESSIONALS TOWARDS USE OF CAST PARTIAL DENTURE IN NEPAL

Background: With increase in treatment options for rehabilitation of partially edentulous patients, the use of cast partial denture in clinical practice as well as teaching curriculum has been decreased. The objective of this study was to evaluate the perspective of dental professionals towards use of cast partial denture in Nepal. Methods: The study consisted of nine close-ended questions regarding the use of cast partial denture by dental professionals in clinical practice throughout Nepal. The weblink of the questionnaire were shared via E-mail to dentists practicing in Nepal, to obtain a response of 350. Statistical analysis was done using SPSS version 26. Results: The study showed that the most preferred choice of rehabilitation was fixed partial denture by all dental professionals around 52.6% of , 60% of prosthodontists and 48.9% by other specialist dentists.The least preferred choice was Removable partial denture about 16.6% by general dental practitioners, 18.5% by prosthodontists and 13.3% by other specialist dentists.Among the different types of removable partial dentures, acrylic partial denture was the most preferred one and the primary reason for not recommending cast partial dentures by the dental professionals was too complicated procedure to be carried out. Nevertheless, majority of the dentists were in favor of giving more importance for teaching cast partial dentures in graduation curriculum. Conclusions: The study concluded that the use of cast partial denture is declining in clinical practice in Nepal due to the complicated procedure of fabrication and esthetic concern. Therefore, there is a need to emphasize the significance of teaching of cast partial dentures in graduation curriculum.

The effect of two different types of removable partial dentures on chewing activity and muscle efficiency.

Background and objectives: Cobalt chromium removable partial denture has been in use for years and despite of the advantages that cobalt chromium provides, it has many disad‐ vantages. In the recent years flexible removable partial denture has been introduced to dentistry with many advantages over cobalt chromium removable partial denture . The purpose of this study was to evaluate the effect of cobalt chromium and flexible removable partial denture on chewing activity and muscle efficiency. Methods: Ten patients were selected, all of them had completely edentulous maxilla and Kennedy Class I partially edentulous lower arch. eight male and two females with their ages ranging from 45 to 60 years. For each patient, an upper complete denture and two lower removable partial dentures (cobalt chromium and flexible) were constructed. Once the dentures were completed, muscle efficiency with the use of Electromyography and chew‐ ing activity by sieving method was performed in scheduled visits. Statistical analysis of data was achieved by means of (SPSS 25). And performing (independent sample T test, one‐way anova test, and multiple comparison Tukey test). Results: The chewing activity test, revealed a statistically significant difference (P&lt; 0.05) between first and fourth visit concerning the flexible partial denture and improvement of chewing, for the cobalt chromium removable partial denture although there was improve‐ ment of chewing but it was not significant. Regarding the muscle efficiency test, this test revealed that there was no major significance between flexible and cobalt chromium re‐ movable partial denture and they are almost the same, but we can notice improvements of muscular efficiency specially in masseter muscle. Conclusions: Within the limitations of this study, it has been concluded that the muscle efficiency is improved within one month of insertion of both types of removable partial denture . Both flexible and cobalt chromium dentures increased muscle efficiency. Flexible removable partial denture increased chewing activity slightly better than cobalt chromium, while cobalt chromium was marginally better at chewing of hard food comparing to flexible denture.

Satisfaction and Complaints of Patients with Removable Partial Dentures: In Sample at Baghdad City, Iraq

Objective: This study examined patients’ complain regarding pain on eating, esthetic and speech problemsand gag reflex with various types of removable partial dentures (RPDs).Method: The study sample included 60 RPD wearers (36 females and 24 males) aged between (25-60)years old. Sex, age, occupation, any experience with previous RPDs, and the complaint with RPDs wererecorded. Data were analyzed using Chi-square test was applied for comparison among different variablesof oral complaints related to removable prosthesis; an independent a sample t-test was utilized. A P-value &lt;0.01 was the criterion for rejection of the invalid hypothesis.Results: the results show 60 patients, 16 (47.05%) were satisfied on acrylic and14 (77.77%) were satisfiedon flexible. And 6 (75%) were satisfied on metallic. The mean level of satisfaction among the three typesof RPDs was significantly different (P &lt; 0.01). In cases satisfaction between flexible and acrylic RPDswas significantly different. But, between either metal or acrylic, or metal and flexible RPDs no significantdifferences (P &lt; 0.01) were recognized.Conclusions: Within the limitations of this study, approximately half of cases that tooka removable partialdentures treatment were satisfied with it, showing that the quality of RPDs(in Iraq/Baghdad city) wassuitable for patients. Pain in eatingis the most common complaint that shows that dental treatments withRPDs should be provided with care when patients have pain in eating.

COMPARING MAXIMUM BITE FORCE FOR DIABETIC PATIENTS WEARING TWO DIFFERENT TYPES OF REMOVABLE PARTIAL DENTURES: A RANDOMIZED CROSS-OVER STUDY

Objective: This study was carried out to compare themaximum bite Force of diabetic patients wearing two different types of removable partial dentures; heat cured acrylic and flexible denture base.The patients

Evaluation of Different Removable Denture Materials in Kennedy Class I Partially Edentulous Situation Mostafa Abosrie(1), Maged El saadawy (2) and Mohamed Aboshama(3) Codex

BACKGROUND: Although Cast Chromium Cobalt alloy has been the material of choice for fabricating Removable Partial Dentures (RPDs) but it has certain drawbacks. New material like the flexible Nylon based Super Polyamide has been introduced to overcome these drawbacks. The present study compared the above two materials for three clinical parameters. MATERIALS AND METHODS: The study was carried out on 15 patients, the selected cases were Kennedy Class I, with missing teeth first, second and third molars in each distal extension side. These fifteen patients received three RPDs; each one was used for six months. Three types of RPDs were made from different base materials; cobalt chromium alloy and thermoplastic denture base materials, (Group A): RPDs made of cast Cr-Co alloy incorporating RPI clasping system with denture base made of heat cured acrylic resin. (Group B): RPDs made of flexible nylon based super polyamide resin incorporating flexible circumferential clasps and denture bases made of flexible nylon, with metal occlusal rests. (Group C): RPDs made of flexible nylon based super polyamide resin. After insertion of each denture, their Clinical performances were evaluated periodically for six months for the following parameters (Gingival index, plaque index and pocket depth). RESULTS: Statistically significant results were obtained in favor of flexible RPDs, in the parameters of (Gingival index, plaque index and pocket depth).Both groups B and C showed less similar values for (Gingival index, plaque index and pocket depth). during usage’ with the incidence being slightly higher for patients wearing the cast RPDs (Group A). CONCLUSION: Based on the favorable results of this study, it can be summarized that the flexible RPDs is a viable alternative to cast RPDs in Kennedy class I partially edentulous situation in the short term.

Strain visualization of supporting tissues rehabilitated using two different types of removable partial dentures

Introduction/Objective. Current biomechanical analyses can provide full view of the strain induced by loading of various replacements to be used for prosthetic rehabilitation. The aim of this study was to analyze strain distribution of supporting tissues beneath two different types of removable partial dentures, commonly indicated in the conventional rehabilitation of partially edentulous patients. Methods. This in vitro study included two groups of experimental models composed of the mandibles (Kenedy Class 1) and two types of removable partial dentures. These models were exposed to occlusal loading and the digital image correlation method was used for strain visualization and strain measurement. Results. The highest strain was measured beneath the removable partial dentures, on the surfaces of bone adjacent to distal abutments and in the anatomical structure called the retromolar area. Strain values in the experimental models with clasp removable partial dentures ranged 0?10%. Strain values in the experimental models with attachment ? removable partial dentures ranged 0?2.3%. Conclusion. The findings showed that the attachment retaining removable partial dentures induced lower strain in the residual alveolar ridges. However, higher strain was detected in the marginal bone next to the abutment teeth.

Removable Partial Denture with dual path of insertion: clinical case report

Removable Partial Dentures (RPD) with dual path of insertion are designed to overcome conventional RPD esthetic limitations, through the use of proximal undercuts for rigid direct retainers. Therefore, dual path RPD is considered a variation of conventional RPD. This paper reports a clinical case where proper function as well as excellent esthetics were obtained with this type of RPD.

Removable partial dentures: Patient satisfaction and complaints in Makkah City, KSA.

ObjectiveTo assess the satisfaction level and complaints among patients using different types of removable partial dentures (RPDs) in Makkah city, KSA.MethodsIn this retrospective study, 551 patients who had received RPDs between February and December 2015 were contacted by telephone. One hundred patients responded, and 60 of them agreed to participate in the study. The participants were asked two questions to determine their satisfaction level and complaints with RPD usage, eating, communication, and aesthetics. Data were analysed statistically by chi-square, analysis of variance, and Scheffe's tests.ResultsOf 60 patients, 35% were very satisfied, 21.7% were satisfied and 23.3% were nearly satisfied. However, only 20% were not satisfied. There were no significant differences in mean RPD satisfaction among different age groups and between sexes (P > 0.01). There was a significant difference in satisfaction among RPD type (P < 0.01). However, no significant differences were recorded between either metal and acrylic, or acrylic and flexible RPDs (P < 0.01). As many as 26.7% of respondents complained of aesthetic problems, 16.7% complained of pain during mastication, 10% complained of gag reflex, and 8.3% complained of phonetic problems. However, the majority of respondents (38.3%) had no complaints.ConclusionThe majority of patients were satisfied with the quality of removable partial dentures treatment in Makkah city hospitals. Oral rehabilitation with RPDs should be applied with care when patients have high aesthetic demands.

A Survey of Prosthodontics Techniques Applied by Dental Practitioners in Sulaimani City

Background: Prosthodontic services have changed markedly due to an introduction of new materials, techniques and treatment options. The aim of this study were to identify the type of materials and the methods used by dental practitioners in their clinics to construct conventional complete dentures and to specify the type and design for removable partial dentures (RPDs); and to then compare them with those taught in dental schools. Materials and methods: A total of 153 dental practitioners in Sulaimani city completed a written questionnaire. The questionnaire included 19 questions regarding complete and RPDs fabrication. Results: Most of the practitioners provide complete dentures (81.6%) and RPDs (95.3%) in their clinics. Polyvinyl siloxane 38.4% and irreversible hydrocolloid 37.6% impression materials were most commonly used to make the preliminary and zinc oxide eugenol 52% for final impressions. The majority of participants did not disinfect their impressions (73.9%). In order to establish the vertical and centric relations, different methods were used. Many practitioners depend on dental technicians to determine the post-dum area (42.4%) and all of them faced different problems during fabrication of the complete denture. Acrylic RPDs were the main type of RPDs provided (89.7%), followed by flexible partial dentures (70.5%). The minority constructed cast metal RPDs (18.4%). Conclusions: Private practitioners did not perform most of the techniques nor use the procedures or materials that are being taught in dental schools. There is a need for continuing dental education programs for improving their clinical skills. Moreover reassessing of the prosthodontic curriculum of the related dental schools is required.

Incidence of partial edentulism and its relation with age and gender

Background and objective: This study aimed to determine the incidence of various partial edentoulism according to Kennedy’s classification of edentulous arches, modification areas, types of removable partial dentures (RPDs), selection of major connectors for RPDs and patterns of tooth loss in relation to the gender and age. Methods: The study was conducted in Hawler Medical University, College of Dentistry, Dep. of Prosthodontics, Erbil/Iraq. The data were collected from 963 patients aged 17-80 years of both genders. The survey was based on visual examination for determining the incidence of Kennedy’s classification, modification areas in relation to the age and gender, determining the cause of tooth loss and types of major connectors for RPDs. Results: Kennedy’s class III in both dental arches was the most dominant pattern at a frequency of 49.84%, with class IV being the least in number. Mandibular RPDs were more common than maxillary RPDs. With an increase in age, there was an increase in the Class I and Class II dental arch and a decrease in Class III and class IV in both arches. Gender had no significant relationship with distributions of RPD classification.The majority of the constructed RPDs were acrylic resin 881(91.49%) and only 82 (8.51%) were metal. Conclusion: Kennedy’s class III is the most common RPD in both dental arches. Gender had no effect on the prevalence of various Kennedy classes, while age has a significant effect.

Survey of partial removable dental prosthesis (partial RDP) types in a distinct patient population

Current demographic information on the number and types of removable partial dentures is lacking in the prosthodontic literature. This study was designed to investigate patterns of tooth loss in patients receiving removable partial dentures (RPDs) in eastern Wisconsin. Digital images (1502) of casts at 5 dental laboratories in eastern Wisconsin were collected. Any prescription requesting fabrication of a removable partial denture was photographed twice. The first photograph was made immediately upon arrival at the laboratory, while the second photograph was made immediately before being returned to the prescribing dentist for the first time. A calibrated investigator analyzed all the photographs for Kennedy Classification, type of RPD, major connector, and other details. Data were analyzed with descriptive statistics. Fisher's exact test was used to confirm repeatability. Kennedy Class I was the most common RPD with a frequency of 38.4%. More than 40% of prescriptions had no design input from the dentist. One in 3 RPDs used acrylic resin or flexible frameworks. One in 5 RPDs had no rests. The horseshoe major connector was the most common maxillary major connector, while the lingual plate was the most common in the mandible. RPDs remain a common prosthodontic treatment in this region. Non-metal RPD frameworks are a common treatment type and rarely include rests. These data indicate a changing partially edentulous patient population and a variable commitment to standard levels of prosthodontic care.

Partiële kunststof plaatprothesen

An acrylic resin removable partial denture is distinguished from other types of removable partial dentures by an all-acrylic resin base which is, in principle, solely supported by the edentulous regions of the tooth arch and in the maxilla also by the hard palate. When compared to the other types of removable partial dentures, the acrylic resin removable partial denture has 3 favourable aspects: the economic aspect, its aesthetic quality and the ease with which it can be extended and adjusted. Disadvantages are an increased risk of caries developing, gingivitis, periodontal disease, denture stomatitis, alveolar bone reduction, tooth migration, triggering of the gag reflex and damage to the acrylic resin base. Present-day indications are ofa temporary or palliative nature or are motivated by economic factors. Special varieties of the acrylic resin removable partial denture are the spoon denture, the flexible denture fabricated of non-rigid acrylic resin, and the two-piece sectional denture. Furthermore, acrylic resin removable partial dentures can be supplied with clasps or reinforced by fibers or metal wires.

Pulpal blood flow changes in abutment teeth of removable partial dentures

The purpose of this study was to investigate the effect of tooth supported (TSD) and tooth-tissue supported (TTSD) removable partial denture wearing on pulpal blood flow (PBF) of the abutment teeth by using Laser Doppler Flowmeter (LDF). Measurements were carried out on 60 teeth of 28 patients (28 teeth and 12 patients of TTSD group, 32 teeth and 16 patients of TSD group) who had not worn any type of removable partial dentures before, had no systemic problems and were non smokers. PBF values were recorded by LDF before insertion (day 0) and after insertion of dentures at day 1, day 7 and day 30. Statistical analysis was performed by student t test and covariance analyses of repeated measurements. In the group TTSD, the mean values of PBF decreased statistically significantly at day 1 after insertion when compared with PBF values before insertion (p<0,01). There was no statistically significant difference among PBF mean values on 1st, 7th and 30th day. However, in the group TSD, there was no statistically significant difference among PBF mean values before insertion and on 1st, 7th and 30th day. In other words, PBF mean values in group TSD continued without changing statistically significant on 1st, 7th and 30th day.TTSD wearing may show negative effect on the abutment teeth due to decreasing basal PBF.

An evaluation of the effects of two distal extension removable partial denture designs on tooth stabilization and periodontal health

A 30-month follow-up study was conducted on 36 patients to evaluate the effects of the lingual plate as a major connector in distally extended removable partial dentures (RPDs) on tooth stabilization. At the same time, the study evaluated the effects of lingual plate-type RPDs and lingual bar-type RPDs on periodontal health. The most striking finding of the study was that, with the exception of gingival recession (GR), periodontal conditions improved with both types of RPDs. At the end of 30 months, there were significant differences in plaque index, GR and tooth mobility (TM) values between treatment groups (P < 0.05). Plaque accumulation was greater in the lingual plate treatment group; however, this did not result in periodontal breakdown. There were no statistically significant differences between treatment groups with respect to pocket depth, gingival index or attachment loss (P > 0.05). Moreover, patients treated with lingual plate-type RPDs demonstrated less TM when compared with patients treated with lingual bar-type RPDs at the end of 30 months follow-up. Overall study findings established that with adequate checks on oral and denture hygiene at regular intervals, patients with RPDs may even experience improved periodontal health. Moreover, the clinical interpretation of decreased TM observed in patients treated with lingual plate-type RPDs may be questionable as the plaque accumulation was greater in the lingual plate treatment group inspite of periodic recalls.

Stress distribution of abutments and base displacement with precision attachment- and telescopic crown-retained removable partial dentures.

Five types of removable partial dentures (two attachment dentures, two telescopic dentures and one clasp denture) were designed. The two attachment dentures were retained by the rigid-precision attachments with or without a stabilizing arm, and the two telescope dentures were retained with cone telescope crowns with or without cross-arch stabilization. The stresses acting on abutment teeth and denture bases and the movements of denture bases were investigated, and the influences of denture design were clarified. The stress acting on a terminal abutment tooth retained by a rigid-precision attachment or cone telescopic crown was larger than that acting on a terminal abutment tooth retained by a clasp. The attachment dentures tended to concentrate more stress at the terminal abutment tooth than did the telescopic dentures. The stress of denture base of an attachment denture and a telescopic denture was less than that of a clasp denture. There was no difference between the stresses of attachment and telescopic dentures. The displacement of the denture base tended to be less when the denture was designed with a rigid connection for the retainer and with cross-arch stabilization.