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Ear, Nose, & Throat Journal Mar 2020
Topics: Aged, 80 and over; Dental Prosthesis; Female; Foreign-Body Migration; Glottis; Humans; Medical Illustration; Postoperative Complications
PubMed: 30955371
DOI: 10.1177/0145561319840156 -
Journal of Prosthodontic Research Feb 2021To critically review the literature using mini-implants for prosthetic rehabilitation of growing patients and to analyze the survival rates and clinical behavior of... (Review)
Review
PURPOSE
To critically review the literature using mini-implants for prosthetic rehabilitation of growing patients and to analyze the survival rates and clinical behavior of mini-implants.
STUDY SELECTION
Controlled clinical trials and case reports published in English, from January 2006 to October 2018, in a peer-reviewed journal in PubMed, Scopus, LILACS, and Cochrane Library databases. Studies using mini-implants for prosthetic rehabilitation in growing patients were included. Articles reporting mini-implants with a diameter greater than 3 mm, recruitment of adult participants, use of implants with other purposes than prosthodontic rehabilitation, and with a follow-up period shorter than 1 year, were excluded from the analysis. The selection was performed independently by two reviewers.
RESULTS
The selection resulted in the inclusion of eight articles. Although the studies presented heterogeneous protocols and follow-ups (varying from 1 to 8 years), only one case of failure was reported, which corresponded to crown displacement. All rehabilitation procedures were performed in the anterior region using mini-implants with different diameters (1.3-2.9 mm) and lengths (9-14 mm). The prosthetic rehabilitation included individual crowns and/or overdentures.
CONCLUSIONS
Mini-implant prosthetic rehabilitation seems to be a viable and promising option for provisional rehabilitation of growing patients, since it seems to preserve the bone structure while restoring function and esthetics until growth ceases, when then mini-implants can be replaced by standard implants.
Topics: Adult; Crowns; Dental Implants; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Denture, Overlay; Humans
PubMed: 32938858
DOI: 10.2186/jpr.JPOR_2019_338 -
CoDAS Jul 2019To evaluate the self-perception of the food conditions of elderly users of dental prosthesis, in order to verify the interference that dental prosthesis has in their...
PURPOSE
To evaluate the self-perception of the food conditions of elderly users of dental prosthesis, in order to verify the interference that dental prosthesis has in their feeding.
METHODS
The present study counted with 60 elderly, participants of the Centro de Convivência Nair Ventorin Gurgacz (Community Center), aged between 60 and 88 years old. All participants answered to a questionnaire elaborated by the researchers and the Geriatric Oral Health Assessment Index (GOHAI).
RESULTS
The elderly who participated in this study, mostly women, used a bimaxillary removable prosthesis for over 30 years; although they classified their nutrition as "good" and did not present preference for specific food consistency, they frequently felt pain while chewing. The average score of the GOHAI was 29.73, considered "low", the index dimension with worst score was physical function, that includes eating, speaking and swallowing. No relation was observed between time of use of dental prosthesis, age and the GOHAI scores.
CONCLUSION
The elderly rarely complaint about discomfort or embarrassment on feeding, however, they present an average lower than expected in the GOHAI index, which indicates that, although they do not report it, many deteriorations, that seem to be natural may be happening and may be the cause of worst quality of life.
Topics: Aged; Aged, 80 and over; Brazil; Cross-Sectional Studies; Deglutition; Dental Prosthesis; Eating; Female; Food; Geriatric Assessment; Humans; Male; Mastication; Middle Aged; Oral Health; Quality of Life; Self Concept; Surveys and Questionnaires
PubMed: 31314861
DOI: 10.1590/2317-1782/20182018080 -
Advances in Clinical and Experimental... Oct 2018Elastic dentures are prostheses made of thermoplastic material. This category includes: nylons, acetals, acrylicpolymers, and acrons. Elastic prostheses have been... (Review)
Review
Elastic dentures are prostheses made of thermoplastic material. This category includes: nylons, acetals, acrylicpolymers, and acrons. Elastic prostheses have been recognized for several years; however, their propertiesare constantly being modified. In the opinion of the majority of patients, elastic prostheses are comfortable,handy and long-lasting. Elastic dentures are a good choice for esthetic reasons. They may be recommendedfor patients who do not accept clasps in framework dentures, but cannot afford dentures supported withprecise elements or implant-based fixed appliances. Such dentures can be applied in masticatory organrehabilitation in patients with increased absolute reflexes, especially retching. Furthermore, such features likesize, construction weight or material plasticity and smoothness are considered to be advantages of thermoplasticmaterials. Elastic dentures are the only removable appliances for patients allergic to metal or acrylic.They are better tolerated by patients with an uneasy prosthetic base or with systemic diseases, e.g., diabetes,who are more susceptible to the traumatic activity of the hard plate of traditional dentures made of acrylicmaterial. Adaptation time is shortened and the number of necessary corrections is reduced. Hygiene rulesas well as follow-up visits terms must be strictly obeyed.
Topics: Acrylic Resins; Dental Prosthesis; Denture Design; Humans
PubMed: 30063127
DOI: 10.17219/acem/70044 -
The International Journal of... 2020Oral cancer treatment involving the maxilla and/or mandible often results in esthetic and functional deficits that can diminish the patient's quality of life. As a...
Oral cancer treatment involving the maxilla and/or mandible often results in esthetic and functional deficits that can diminish the patient's quality of life. As a result, expeditious reconstruction of the defect and dental rehabilitation is desirable. Dental rehabilitation shortly after reconstruction with an osteocutaneous free flap and resection prosthesis is a persistent challenge for patients with oncologic defects where immediate dental rehabilitation is not a possibility. Additionally, conventional prosthesis fabrication techniques are impractical or impossible due to postoperative anatomical changes and limitations in clinical armamentarium. To address these limitations, a technique and a novel implant-supported prosthetic workflow for the oncologic patient were developed to provide interim dental rehabilitation for such clinical situations. This article describes the prosthesis fabrication technique, reports short-term outcomes, and evaluates patient-reported quality-of-life outcomes using the FACE-Q Head and Neck Cancer Module.
Topics: Dental Implantation, Endosseous; Dental Implants; Dental Prosthesis, Implant-Supported; Fibula; Free Tissue Flaps; Humans; Mandibular Reconstruction; Quality of Life
PubMed: 33151192
DOI: 10.11607/prd.4675 -
BMC Oral Health Nov 2022Many clinical studies have reported the high success rate of the All-on-4 concept. In the present study, we aimed to compare the stress distribution with different...
BACKGROUND
Many clinical studies have reported the high success rate of the All-on-4 concept. In the present study, we aimed to compare the stress distribution with different tilted distal implants and cantilever lengths in an All-on-4 system using the two-dimensional photoelastic method and to establish the All-on-4 implant photoelastic model by computer-aided design (CAD) and rapid prototyping (RP). METHODS: The data of the human edentulous mandible were acquired by computed tomography (CT). Three human edentulous mandible All-on-4 implant models with different distally inclined implant holes were fabricated using Mimic, Geomagic Studio software, and a light solidifying fast shaping machine. Then the final photoelastic models were established through the traditional method. Each of the three models had four NobelSpeedy Replace implants between the interforaminal regions. The two posterior implants were placed 0, 15, and 45 degrees distally before the mental foramen. The four implants were splinted by wrought cobalt-chromium alloy frameworks. Each of the three photoelastic models was submitted to a 150 N vertical load at five points on the framework: the central fossa of the mandibular first molar, and 0 mm, 5 mm, 10 mm, and 15 mm of the cantilever length. The stress produced in the models was photographed with a digital camera, and the highest value of the stressed fringe pattern was recorded.
RESULTS
The All-on-4 implant photoelastic model established by CAD and RP was highly controllable and easy to modify. The position and inclination of implants were accurate, and the frameworks could be passively emplaced. The stress values were higher around a single tilted implant compared with the distal implant in All-on-4 with the same inclination. The 0-degree distal implant and 45-degree distal implant demonstrated the highest and lowest stress when loading at the central fossa of the mandibular first molar, respectively. With the same inclination of distal implant, the peri-implant bone stress increased as the length of cantilever increased.
CONCLUSION
The method of establishing the All-on-4 implant photoelastic model by CAD and RP was highly controllable, convenient, fast, and accurate. The tilted implants splinted in the fully fixed prosthesis with reduced cantilever lengths did not increase the stress level compared with the vertical distal implants.And this illustrated that the influence of cantilever on stress distribution was greater than the influence of implant inlination.
Topics: Humans; Dental Prosthesis, Implant-Supported; Dental Stress Analysis; Dental Prosthesis Design; Dental Implants; Stress, Mechanical; Mandible
PubMed: 36335327
DOI: 10.1186/s12903-022-02520-8 -
Journal of Prosthodontic Research Apr 2023This study aimed to assess patients' expected burdens before treatment and their perceived burdens after the surgical and prosthodontic procedures of mandibular... (Randomized Controlled Trial)
Randomized Controlled Trial
PURPOSE
This study aimed to assess patients' expected burdens before treatment and their perceived burdens after the surgical and prosthodontic procedures of mandibular overdenture treatment and to evaluate factors influencing patients' perceptions.
METHODS
Data were collected from 47 participants enrolled in a randomized clinical trial comparing mandibular overdentures retained by one or two implants. A 20-item questionnaire measured on a four-point Likert scale covering the surgical and prosthetic treatment procedures was used to assess the patients' perception of the procedural burdens before (expected burdens) and immediately after (experienced burdens) each procedure. Operators' perceptions of intercurrences associated with the procedures were also assessed as an independent variable.
RESULTS
Low levels of perceived burdens were observed both before and after treatment. The mean overall scores of 1.65 ± 0.46 and 1.53 ± 0.33 for expected and experienced burdens, respectively, indicated that most items ranged between "not burdensome at all" and "somewhat burdensome." Significant differences between expected and experienced burdens were found for eight items (P < 0.001). Considering the treatment stages, expected burdens scored higher in the pre-surgical, surgical, and prosthetic stages and lower in the post-surgical phase than experienced burdens. Overall, the experienced burdens were significantly affected by the expected burdens (P < 0.001) and operator's perceived burdens(P = 0.045).
CONCLUSIONS
Treatments were associated with low levels of perceived burdens related to surgical and prosthodontic procedures and were highly correlated with the expected burdens before treatment. However, patients tend to overestimate the expected burdens before treatment, especially for surgical procedures.
Topics: Humans; Denture, Overlay; Dental Implants; Patient Satisfaction; Denture, Complete, Lower; Jaw, Edentulous; Mandible; Dental Prosthesis, Implant-Supported; Denture Retention; Treatment Outcome
PubMed: 35786572
DOI: 10.2186/jpr.JPR_D_21_00343 -
The Journal of Prosthetic Dentistry Jan 2023Despite the broad clinical application of zirconia for fixed implant-supported prostheses, evidence of long-term performance is sparse.
STATEMENT OF PROBLEM
Despite the broad clinical application of zirconia for fixed implant-supported prostheses, evidence of long-term performance is sparse.
PURPOSE
The purpose of this retrospective study was to evaluate the long-term clinical and radiographic outcomes of zirconia-based partial and complete screw-retained implant-supported zirconia fixed dental prostheses (ISZFDPs).
MATERIAL AND METHODS
Records of patients treated with dental implants and ISZFDPs between December 2004 and June 2017 were screened. Eligible study participants, according to inclusion criteria, were contacted and invited to undergo clinical and radiographic examinations. Outcomes were evaluated as implant and prosthetic survival rates, prosthetic success rate, complications, marginal bone level (MBL) change, and soft tissue condition. Along with the effects of zirconia prosthesis type and level, the effects of implant type and connection, type of loading, and follow-up on MBL were tested with a generalized linear effects model (GLEM) (α=.05).
RESULTS
A total of 118 patients were identified, of whom 20 (16.9%) were not available for clinical examination for various reasons. Ninety-eight participants (mean age 60.7 ±11.7 years) with 337 implants were included, of which 176 (52.2%) had been immediately loaded. A total of 111 ISZFDPs (96 zirconia connection and 15 titanium base) were investigated: 24 complete ISZFDPs with a zirconia connection (12.9 ±0.97 dental units, minimum 12, maximum 14), 72 partial with a zirconia connection (3.11 ±1.12, minimum 2, maximum 7), 15 partial with a titanium base (3.62 ±1.02, minimum 2, maximum 5). Forty ISZFDPs had been in function for ≥10 years (36%), 38 for 5 to 9 years (34.2%), and 33 for 2 to 4 years (22.8%). The mean follow-up time was 7.2 ±3.4 years. No zirconia fractures were identified. Two implants and 2 ISZFDPs failed, with chipping being the most common complication (13.5%). The implant survival rate was 99.4%, and the prosthetic survival rate was 98.2%. The cumulative prosthetic success rate was 91.9%. MBL change was -0.18 ±0.59 mm. Thirteen implants were treated for peri-implantitis (3.8%), and 9 for mucositis (2.7%), but presented healthy peri-implant soft tissues at the follow-up examination. A significant difference was found between the implant-level and abutment-level prostheses (P=.013), with less marginal bone loss observed in ISZFDPs delivered at the implant level.
CONCLUSIONS
Zirconia-based screw-retained implant-supported prosthesis can be considered a reliable long-term treatment option for partial and complete edentulism. No zirconia fractures were experienced. Stable bone levels and low peri-implantitis rates were reported regardless of the ISZFDP type and level, implant type and connection, and type of loading.
Topics: Humans; Middle Aged; Aged; Retrospective Studies; Peri-Implantitis; Dental Implants; Titanium; Dental Restoration Failure; Bone Screws; Dental Prosthesis, Implant-Supported
PubMed: 34187699
DOI: 10.1016/j.prosdent.2021.04.026 -
Journal of Prosthodontic Research Jul 2022This clinical report describes treatment with a double-crown-retained removable dental prosthesis fabricated using an intraoral scanner (IOS) and computer-aided...
PATIENT
This clinical report describes treatment with a double-crown-retained removable dental prosthesis fabricated using an intraoral scanner (IOS) and computer-aided design/manufacturing technology (CAD/CAM). A 68-year-old female patient presented with complaints of missing maxillary right first and left second premolars. CAD/CAM technology was applied to plan treatment with a double-crown-retained removable dental prosthesis. The patient consented to this treatment option but did not want orthodontic treatment for the anterior crossbite of the right side. After the definitive preparation of the abutment teeth, the shape of the provisional restoration was adjusted to match the definitive prosthesis. An IOS was used to obtain digital scans of the provisional restoration, occlusion, antagonist arch, and prepared surface of the abutment teeth. First, the primary crowns were milled from cobalt-chromium alloy. Next, using an intraoral scanner, a pick-up impression of the primary crowns was performed, and the secondary crowns were designed, milled, and veneered. After delivery, the patient expressed satisfaction with the functionality, esthetics, and fit of the double-crown-retained removable dental prosthesis.
DISCUSSION
The surface of the primary crowns was coated with scan spray when the pick-up impression was made using the IOS. Practice is needed to achieve a thin and homogeneous coating with scan spray to improve reproducibility.
CONCLUSION
Double-crown-retained removable dental prostheses can be successfully fabricated using an IOS and CAD/CAM technology, resulting in patient satisfaction.
Topics: Aged; Computer-Aided Design; Crowns; Dental Prosthesis Design; Female; Humans; Reproducibility of Results; Technology
PubMed: 34853251
DOI: 10.2186/jpr.JPR_D_21_00127 -
Journal of Prosthodontic Research Apr 2024To evaluate the marginal adaptation and fracture resistance of three computer-aided design/computer-assisted manufacturing hybrid dental materials with different...
PURPOSE
To evaluate the marginal adaptation and fracture resistance of three computer-aided design/computer-assisted manufacturing hybrid dental materials with different occlusal thicknesses.
METHODS
Ninety single-molar crowns were digitally fabricated using a milled hybrid nanoceramic (Cerasmart, CE), polymer-infiltrated ceramic network (PICN, Vita Enamic, VE), and 3D-printed materials (Varseosmile, VS) with occlusal thicknesses of 0.8, 1, and 1.5 mm (10 specimens/group). Anatomical 3D-printed resin dies (Rigid 10K) were used as supporting materials. A CEREC MCX milling unit and a DLP-based 3D printer, Freeform Pro 2, were utilized to produce the crown samples. Before cementation, the marginal adaptation, absolute marginal discrepancy (AMD), and marginal gap (MG) were assessed using micro-CT scanning. After cementation with self-adhesive resin cement, fracture resistance was evaluated using a universal testing machine. The number of fractured crowns and the maximum fracture values (N) were recorded. Data were statistically analyzed using both one- and two-way ANOVA, followed by Tukey's honestly significant difference (HSD) test.
RESULTS
For all occlusal thicknesses, the VS crowns demonstrated the lowest AMD and MG distances, significantly different from those of the other two milling groups (P < 0.05), whereas CE and VE did not differ significantly (P > 0.05). All VS crowns were fractured using the lowest loading forces (1480.3±226.1 to 1747.2±108.7 N). No CE and 1 and 1.5 mm VE crowns fractured under a 2000 N maximum load.
CONCLUSIONS
All hybrid-material crowns demonstrated favorable marginal adaptation within a clinically acceptable range, with 3D printing yielding superior results to milling. All materials could withstand normal occlusal force even with a 0.8 mm occlusal thickness.
Topics: Dental Porcelain; Crowns; Materials Testing; Ceramics; Computer-Aided Design; Printing, Three-Dimensional; Dental Prosthesis Design; Dental Marginal Adaptation
PubMed: 37438119
DOI: 10.2186/jpr.JPR_D_23_00089