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Journal of the Mechanical Behavior of... Jul 2021To measure the pressure distribution on the oral mucosa in vitro by comparing the pressure distributions under a complete denture and that of an implant overdenture.
PURPOSE
To measure the pressure distribution on the oral mucosa in vitro by comparing the pressure distributions under a complete denture and that of an implant overdenture.
MATERIALS AND METHOD
Anatomically accurate models and conventional Class I complete denture (CD) were produced and subjected to cyclic loading using a 100 N vertical centric and unilateral masticatory load with the universal testing machine (Instron 3369). Four miniature pressure sensors were positioned at four different locations in the intaglio surface of the denture and recorded pressure at 100 Hz frequency measured during a 10-cycle load at 1 Hz. Testing was repeated in different clinical combinations; CD vs. single implant overdentures (1-IOD), CD vs. two, three and four implant overdentures (2-IOD, 3-IOD vs. 4-IOD). The pressure profile (kPa) of complete dentures were measured and compared to the implant overdenture combinations. Collected data was statically analysed using SPSS and one-way analysis of variance.
RESULTS
The highest mean pressure was observed in CD group, with the mean mandible buccal ridge pressure value of 212.82 kPa ± 136.9 due to its surface area. There were no statistically significant differences between the group combinations (p = 0.146) but between various locations in the mean pressure recorded across the five denture/overdenture combinations.
CONCLUSION
CD experienced large pressure values on mandibular denture. 1-IOD demonstrated the most pressure in comparison to CD where with an increase in the number of implants used, it transformed the denture from being pure-borne mucosa to an implant overdenture, providing support and distributing the pressure amongst the implants.
Topics: Dental Implants; Denture, Overlay; Humans; Mandible; Mucous Membrane
PubMed: 33894527
DOI: 10.1016/j.jmbbm.2021.104531 -
Zhonghua Kou Qiang Yi Xue Za Zhi =... Dec 2021Many randomized controlled clinical trials have reported that implant overdentures provided edentulous people with better retention, stability, and masticatory... (Review)
Review
Many randomized controlled clinical trials have reported that implant overdentures provided edentulous people with better retention, stability, and masticatory performance than conventional complete dentures did. The design of implant overdentures for edentulous jaws should be based on comprehensive consideration of factors such as anatomic structure, alveolar bone resorption, inter-arch distance, choice of implant number/distribution and suprastructure. During the clinical procedure, timing of attachment connection, choice of impression technique, methods of maxilla-mandibular relationship registration, wax-up try-in, and prostheses delivery should be determined according to the type of implant overdentures. The appropriate choices and conduction of the above-mentioned procedures can guarantee the long-term success of the prostheses. This review elaborates on the clinical significance, treatment design, key steps in clinical procedure of implant overdenture, and summarizes follow-up and maintenance following denture delivery.
Topics: Denture, Overlay; Humans
PubMed: 34915647
DOI: 10.3760/cma.j.cn112144-20210925-00434 -
The International Journal of... 2021To report changes in denture satisfaction and oral health-related quality of life (OHRQoL) in edentulous patients treated with two-implant mandibular overdentures (IODs)... (Randomized Controlled Trial)
Randomized Controlled Trial
PURPOSE
To report changes in denture satisfaction and oral health-related quality of life (OHRQoL) in edentulous patients treated with two-implant mandibular overdentures (IODs) over a follow-up of 8 to 10 years.
MATERIALS AND METHODS
This is a follow-up of a previous study carried out between 1997 and 2005. The patients were originally randomly divided into one group receiving IODs and another group who had their conventional mandibular dentures relined (RCD group). The RCD group was offered and received IODs at the 2-year follow-up. The participants completed a self-administered questionnaire containing demographics, 15 variables related to denture satisfaction, and 20 questions from the Oral Health Impact Profile (OHIP-20). Changes over time were analyzed using multilevel linear models for denture satisfaction and multilevel ordinal regression analyses for OHIP-20 variables. Comparisons between groups were analyzed using Mann-Whitney U test for ordinal and t test for metric data.
RESULTS
Disregarding patients who passed away during follow-up, the 29 responders represented a response rate of 76%. The degree of denture satisfaction and the OHIP-20 scores remained high and stable in the IOD group over the 10-year observation period for all but one variable. The same factors showed only a modest improvement in the RCD group for the first 2 years; however, during the subsequent 8 years of the observation period (after receiving IODs), denture satisfaction and OHIP-20 scores improved to the same level as the original IOD group.
CONCLUSION
The positive effect on denture satisfaction and OHRQoL of edentulous patients treated with two-implant mandibular overdentures remained unchanged 8 to 10 years after treatment.
Topics: Dental Implants; Dental Prosthesis, Implant-Supported; Denture Retention; Denture, Complete, Lower; Denture, Overlay; Follow-Up Studies; Humans; Mandible; Oral Health; Patient Satisfaction; Personal Satisfaction; Quality of Life
PubMed: 33616561
DOI: 10.11607/ijp.7521 -
Nigerian Journal of Clinical Practice May 2019The effect of oral rehabilitation on the oral perception of implant-supported overdenture patients is a concern. This study evaluated the effects of the attachment type...
AIM
The effect of oral rehabilitation on the oral perception of implant-supported overdenture patients is a concern. This study evaluated the effects of the attachment type and palatal coverage on oral perception and patient satisfaction in maxillary implant-supported complete denture patients.
SUBJECTS AND METHODS
The correlation between oral perceptual ability (OPA) and patient satisfaction in three groups was investigated. Group I consisted of dentate individuals (n = 40), Group II consisted of maxillary implant-supported complete denture patients with bar attachments and palatal coverage (n = 12), and Group III of maxillary implant-supported complete denture patients with magnetic attachments and palatal coverage (n = 14). In addition, implant-supported maxillary overdentures with bar attachments, with (Group II; n = 12) and without (Group IV; n = 18) palatal coverage, were examined in terms of patient satisfaction and OPA. The relationship between OPA and patient satisfaction was assessed with the Turkish version of the Oral Health Impact Profile-14 (OHIP-TR-14) satisfaction survey. To compare oral sensory function among the groups, tactile awareness and pressure awareness were assessed.
RESULTS
There was no significant difference in OHIP-TR-14 scores between Groups II and III. In addition, there was no correlation between oral tactile function and patient satisfaction in Groups II and III. For patients with maxillary bar-retained implant-supported overdentures, palatal coverage did not affect the correlation between OPA and patient satisfaction, lateral pressure threshold, or tactile thickness threshold.
CONCLUSION
According to the results of the study, whether maxillary implant-supported overdentures were made with a bar- or magnetic-type retainer, and whether bar-retained implant-supported overdentures had an open or closed palate did not affect the correlation between patient satisfaction and oral perception.
Topics: Dental Prosthesis, Implant-Supported; Denture Retention; Denture, Complete; Denture, Overlay; Female; Humans; Male; Maxilla; Middle Aged; Palate; Patient Satisfaction; Surveys and Questionnaires; Touch Perception
PubMed: 31089022
DOI: 10.4103/njcp.njcp_14_19 -
The Journal of Contemporary Dental... Apr 2018Patients present with malocclusions in the form of bilateral open bite with functional and esthetic challenges. These are particularly so whereby these are acquired...
Patients present with malocclusions in the form of bilateral open bite with functional and esthetic challenges. These are particularly so whereby these are acquired through growth anomalies that create a change in the occlusal status whereby a patient has to adapt to the challenge of the occlusal change. While surgical intervention is a considered option to correct such changes, not all patients are willing to endure the consequences of this intervention and as such this report presents a conservative minimally invasive approach. This clinical report demonstrates a nonsurgical approach in the management of a patient with bilateral metabolically active condylar hyperplasia. The patient presented with a bilateral open bite with occlusal contacts only present on her second molars. The severity of the open bite was reported to be recently progressing and getting worse. This condition had impaired her chewing function and quality of life over an 8-year period. Bone scintigraphy was performed and metabolically active bilateral condylar hyperplasia was diagnosed. The patient refused surgical intervention and instead a conservative overlay denture was prescribed, which successfully restored her function and esthetics. Removable overlay dentures can be a relatively simple and effective treatment option for patients presenting with newly acquired bilateral open bites to give a functional and esthetic outcome. This clinical report shows the conservative management of bilateral condylar hyperplasia with a simple removable overlay appliance. The occlusion has stabilized and the patient functions well. Bone scintigraphy, Condylar hyperplasia, Open bite, Overlay denture.
Topics: Denture, Overlay; Female; Humans; Hyperplasia; Mandibular Condyle; Middle Aged; Open Bite; Radionuclide Imaging
PubMed: 29728554
DOI: No ID Found -
Evidence-based Dentistry Dec 2017Data sourcesData sources Medline, Embase and the Cochrane Central Register of Controlled Trials (CENTRAL).Study selectionRandomised control trials (RCTs), cohort study...
Data sourcesData sources Medline, Embase and the Cochrane Central Register of Controlled Trials (CENTRAL).Study selectionRandomised control trials (RCTs), cohort study or case control studies involving prosthetic treatment where the outcomes included change in intakes of macronutrients (ie proteins, fats and carbohydrates) and/or micronutrients (eg vitamins and calcium) and/or indicators for nutritional status were considered.Data extraction and synthesisTwo reviewers independently screened the studies, with one reviewer abstracting data for checking by a second reviewer. Risk of bias was assessed independently by two reviewers using the Cochrane risk of bias tool. A fixed effects model was used to estimate the weighted mean difference (WMD) and 95% CI for change in body mass index (BMI), albumin and serum vitamin B12 between overdenture and conventional denture six months after treatment.ResultsEight studies (six RCTs and two prospective cohort studies) involving a total of 901 patients were included in a narrative synthesis. Three RCTs (322 patients) contributed to a meta-analysis suggesting no significant difference in change in BMI between an overdenture and conventional denture six months after treatment WMD= -0.18 kg/m2 (95%CI; -0.52 to 0.16), and no significant difference in change in albumin or vitamin B12 between the two treatments.ConclusionsThe modifying effect of overdenture treatment on nutritional status might be limited. Further studies are needed to evaluate the effectiveness and efficacy of denture treatments.
Topics: Calcium, Dietary; Denture, Overlay; Humans; Prospective Studies; Vitamin B 12; Vitamins
PubMed: 29269818
DOI: 10.1038/sj.ebd.6401273 -
The Journal of Prosthetic Dentistry Feb 2021The clinical performance of implant-retained overdentures (IODs) with plastic bar clips made of different materials in the same design and dimensions may vary according...
STATEMENT OF PROBLEM
The clinical performance of implant-retained overdentures (IODs) with plastic bar clips made of different materials in the same design and dimensions may vary according to the patient's daily home care procedures. However, information about the effects of denture cleaning solutions on the retention of Hader bar clips is lacking.
PURPOSE
The purpose of this in vitro study was to evaluate the retention of Hader bar clips made of different polymers after being soaked in denture cleaning solutions.
MATERIAL AND METHODS
Ninety Hader bar clips made of polyamide (PA, n=30), polytetrafluoroethylene (PTFE, n=30), and polyetherketoneketone (PEKK, n=30) materials were tested. Two multiunit abutments were screwed onto the implant analogs and embedded into an acrylic resin block in a standardized position. The digital scanning of the abutments was acquired, and the bar patrix of each material system milled from a cobalt-chromium (Co-Cr) alloy disk by using computer-aided design and computer-aided manufacturing (CAD-CAM). After the milled bar patrices were screwed onto abutments and the metal housings of the bar clips were embedded into acrylic resin blocks, they were connected passively at the same angulation to a universal testing machine. The initial retention values of all Hader bar clips were measured, and each material system was divided into 3 subgroups (n=10) before soaking in the cleaning solutions: distilled water (DW), 5% sodium hypochlorite (NaOCl), or sodium bicarbonate-sodium perborate (SBSP). Each material was soaked for the equivalent of 3 months of clinical use. The final retention values of each Hader bar clip were measured. The data were statistically analyzed by using a 2-way analysis of variance (ANOVA), the Tukey honestly significant difference (HSD) test, and the paired sample t test (α=.05).
RESULTS
The 2-way ANOVA showed that the denture cleaning solution, the clip material, and their interactions led to significantly different retention values (P<.001). A decrease was observed for the retention values of all test groups after soaking in the cleaning solutions (P<.05). No retention was observed for the PTFE clips after soaking in the 5% NaOCI solution.
CONCLUSIONS
The denture cleaning solutions negatively affected the retention of Hader bar clips, regardless of the type of solution and clip material. The 5% NaOCI solution not only decreased the retention of PTFE clips but also completely degraded it. It is recommended that 5% NaOCI solution be avoided for the daily care of IODs with PTFE clips.
Topics: Dental Prosthesis, Implant-Supported; Dental Stress Analysis; Denture Retention; Denture, Overlay; Humans; Surgical Instruments
PubMed: 33198989
DOI: 10.1016/j.prosdent.2020.09.026 -
International Journal of Implant... Dec 2022To assess the implant and prosthesis survival rates, the clinical, radiographical and patient-related outcome measures, and the masticatory performance of maxillary...
PURPOSE
To assess the implant and prosthesis survival rates, the clinical, radiographical and patient-related outcome measures, and the masticatory performance of maxillary overdentures supported by two implants in patients with an atrophic maxilla.
METHODS
In this case series, 15 consecutive patients who were eligible for maxillary implant overdenture therapy, but who had insufficient bone volume to place at least four implants and were unwilling to be treated with reconstructive surgery were asked to participate. After giving consent, participants received two implants in the maxilla under local anaesthesia. After 3 months of osseointegration, a maxillary overdenture with palatal coverage and solitary attachments was fabricated. Implant and overdenture survival, marginal bone level change, clinical outcome measures, masticatory performance and patient-related outcomes were evaluated at baseline and 1 year after overdenture placement.
RESULTS
Fourteen out of 15 participants completed the follow-up period of 12 months. Implant and overdenture survival rate were 89.3% and 85.7%, respectively. Change in marginal bone level (- 0.5 ± 0.7 mm), change in probing depth (0.0 ± 1.0 mm), and clinical outcomes were favourable. Masticatory performance and patient-related outcomes improved significantly compared to baseline. Complications were minimal.
CONCLUSIONS
Within the limitations of this study, it can be concluded that patients with extreme resorption of the maxilla that are unwilling to be treated with reconstructive surgery, benefit from two-implant maxillary overdentures retained by solitary attachments in terms of improved masticatory functioning and denture satisfaction. However, they have relatively high risk of implant loss.
TRIAL REGISTRATION
UMCG Trial Register (RR201900060), registered 22 January 2019.
Topics: Humans; Jaw, Edentulous; Denture Retention; Dental Prosthesis, Implant-Supported; Dental Implants; Denture, Overlay; Atrophy
PubMed: 36484878
DOI: 10.1186/s40729-022-00460-0 -
The Journal of Contemporary Dental... Jan 2020This study aimed to evaluate and compare the effect of locator attachment and ball and socket (BS) attachment on the peri-implant and periabutment supporting structures... (Randomized Controlled Trial)
Randomized Controlled Trial
OBJECTIVE
This study aimed to evaluate and compare the effect of locator attachment and ball and socket (BS) attachment on the peri-implant and periabutment supporting structures on clinical pocket depth and gingival index in cases of limited interarch spaces in mandibular Kennedy class I implant-supported removable partial overdentures.
MATERIALS AND METHODS
A comparative clinical trial was conducted among twenty partially edentulous patients aged 30-60 years. The study participants were randomly divided into two study groups based on the attachment system used: group I - locator attachment, and group II - BS attachment. Two implants were positioned in the 1st or 2nd molar area following the two-stage surgical protocol. Evaluation of the peri-implant and periabutment supporting structures was done at the time of overdenture insertion and after 6, 12, and 18 months by measuring the pocket depth and gingival index. Inter- and intragroup comparisons were done using independent-samples test and paired-sample test respectively. < 0.05 was considered statistically significant.
RESULTS
It was observed that there was a statistically significant increase in the pocket depth around the implant as well as the abutment in both groups at 6, 12, and 18 months when compared to baseline. Intergroup comparison for pocket depth and gingival index revealed nonsignificant results. However, the values were higher in the BS group.
CONCLUSION
The locator attachment group had lower, though statistically not significant, pocket depth and gingival index scores around both the dental implant and the natural abutment as compared with the BS attachment.
CLINICAL SIGNIFICANCE
Gingival health surrounding dental implant attachments is very crucial for the long-term success of dental implant, this could help the clinician to select the proper design for implant attachment underneath the over denture prosthesis.
Topics: Adult; Dental Implants; Dental Prosthesis, Implant-Supported; Denture Retention; Denture, Overlay; Humans; Mandible; Middle Aged
PubMed: 32381804
DOI: No ID Found -
Journal of Prosthodontics : Official... May 2021This technical report describes a workflow to fabricate an implant overdenture via digital duplication of an interim complete removable dental prosthesis and additive...
This technical report describes a workflow to fabricate an implant overdenture via digital duplication of an interim complete removable dental prosthesis and additive manufacturing (3D printing). An edentulous patient was provided with an interim maxillary denture after implant placement. After 4 months of healing, the existing interim denture was scanned, duplicated via 3D printing, and used to make the final impression, record the maxillomandibular interocclusal relationship, and transfer the esthetic information to the definitive implant overdenture. The framework of the implant overdenture was digitally designed and manufactured using a direct metal printing (DMP) system. This digital duplication workflow facilitated the implant overdenture fabrication with favorable clinical outcomes.
Topics: Computer-Aided Design; Dental Implants; Dental Prosthesis, Implant-Supported; Denture, Overlay; Esthetics, Dental; Humans; Printing, Three-Dimensional
PubMed: 32656819
DOI: 10.1111/jopr.13225