Temporary Prosthesis Research Articles

Using the Nasopalatine Canal for Enhanced Distribution in Severely Atrophic Maxilla With Immediate Loading of Zygomatic Implants: An 8-Year Retrospective Cohort Study.

This study presents retrospective 8-year clinical performance data from a patient cohort treated with immediately loaded maxillary full prostheses supported by zygomatic implants combined with implants placed in the nasopalatine canal, as a treatment for severely resorbed edentulous ridges. A retrospective analysis was conducted on data of maxillary edentulous patients with severe bone atrophy. All of them received zygomatic implants in combination with an implant placed in the nasopalatine foramen and an immediately loaded fixed temporary prosthesis in the first 24 hours. The frequency of major and minor adverse events was presented according to the time of occurrence. Fifteen patients were included in the study, without cases of implant loss or sensitivity in the nasopalatine region were observed up to 8 years. Only 1 major complication was observed, whereas minor complications were more frequent. In conclusion, this 8-year follow-up study demonstrated that the nasopalatine canal can be considered a viable implant site, with no major risks, to improve biomechanics by enabling a polygonal distribution in severely atrophic maxillae treated with zygomatic implants and immediate loading.

Effects of build orientation angles on temporary prosthesis

Effects of build orientation angles on temporary prosthesis

Comparison of Various Surface Treatment Procedures on the Roughness and Susceptibility to Staining of Provisional Prosthodontic Materials.

Esthetically pleasing temporary prostheses are often necessary for extended periods in a variety of clinical scenarios. Adjustments to the occlusion or margins are commonly needed before cementing the temporary prosthesis. Therefore, it is clinically necessary to repolish the rough surface to avoid biological and esthetic issues associated with rough surfaces. The purpose of this in vitro study was to assess and compare the impact of various polishing protocols on the surface roughness and color stability of three resin materials used for provisional crowns. A total of 150 specimens were fabricated from auto-polymerizing polymethyl methacrylate, bis-acryl composite, and Methyl methacrylate-LC resin using a stainless steel mold. Each material group was divided into five groups (n = 10) based on the applied surface treatment: positive control group (G1): no roughening or surface treatment, Negative control group (G2): acrylic bur-roughened surface without any polishing, the different surface treatment groups of silicon carbide and aluminum oxide stone polishing (G3), diamond-coated rubber twist (G4), and Surface Glaze (G5). An optical profilometer was used to assess the surface roughness of all samples. After undergoing 6000 cycles of thermocycling followed by immersion in a coffee solution for 15 days at 37 °C, color parameters were measured using a spectrophotometer both before and after a storage period to evaluate color differences. A two-way ANOVA test with α = 0.05 significance level was carried out to determine the impacts of both the materials utilized and the polishing protocol. Among the three types of resin examined, the bisacryl group exhibited superior surface quality in positive control groups, while PMMA resin demonstrated higher polishability. The diamond-coated rubber twits resulted in lower Ra values of 0.36 (0.01) µm, 0.52 (0.11) µm, and 0.28 (0.05) µm for PMMA, BAMA, and MMLC resins, respectively. The application of photo-polymerized surface glaze led to a plaque accumulation threshold of 0.2 µm across all resin groups. The greatest mean color change occurred in the negative control group, indicating a propensity for more staining on rougher surfaces. The Bisacryl resin exhibited higher ΔE values, whereas PMMA showed better color stability. The lowest ΔE values were found when the surface glaze was applied to all of the provisional crown resins. Untreated Bisacryl resin exhibited the lowest Ra values, while PMMA resins demonstrated superior surface morphology after polishing. PMMA provisional crown resins showed increased resistance to staining. The use of surface glaze enhanced both smoothness and color stability on the surfaces.

Full mouth rehabilitation of a patient with Restorative Space Issues and loss of VDO by replacing maxillary arch with fixed prosthesis opposing a flexible removable partial denture in mandibular arch: A case report

Primary objective of full mouth rehabilitation is the restoring the teeth to optimal physiological and functional balance . Planning a comprehensive course of treatment for a number of missing teeth can be difficult, particularly when the vertical dimension (VD) of the occlusion is reduced. In this case report the sequential methodical interdisciplinary approach employed to treat multiple missing teeth with a loss of VD is described. The patient receives a temporary prosthesis by increasing the vertical dimension.A definitive reconstruction using a fixed prosthesis in the maxillary arch and mandibular ant region and a flexible partial denture in the mandibular arch was carried out following validation of the newly established restorative vertical dimension. A dentist can improve a patient's quality of life by providing functional harmony and aesthetic comfort through appropriate diagnosis and treatment planning

An Antibacterial-Loaded PLA 3D-Printed Model for Temporary Prosthesis in Arthroplasty Infections: Evaluation of the Impact of Layer Thickness on the Mechanical Strength of a Construct and Drug Release.

Infections are one of the main complications in arthroplasties. These infections are difficult to treat because the bacteria responsible for them settle in the prosthesis and form a biofilm that does not allow antimicrobials to reach the infected area. This study is part of a research project aimed at developing 3D-printed spacers (temporary prostheses) capable of incorporating antibacterials for the personalized treatment of arthroplasty infections. The main objective of this research was to analyze the impact of the layer thickness of 3D-printed constructs based on polylactic acid (PLA) for improved treatment of infections in arthroplasty. The focus is on the following parameters: resistance, morphology, drug release, and the effect of antibacterials incorporated in the printed temporary prostheses. The resistance studies revealed that the design and layer thickness of a printed spacer have an influence on its resistance properties. The thickness of the layer used in printing affects the amount of methylene blue (used as a model drug) that is released. Increasing layer thickness leads to a greater release of the drug from the spacer, probably as a result of higher porosity. To evaluate antibacterial release, cloxacillin and vancomycin were incorporated into the constructs. When incorporated into the 3D construct, both antibacterials were released, as evidenced by the growth inhibition of Staphylococcus aureus. In conclusion, preliminary results indicate that the layer thickness during the three-dimensional (3D) printing process of the spacer plays a significant role in drug release.

Effects of Printing Angle and Post-Curing Time on the Color and Translucency of 3D-Printed Temporary Restoration.

In resins produced with a 3D printer, the printing parameters affect the properties of the restoration produced. This study examined the effect of the printing angle and post-curing time on the optical properties of temporary restorations. A total of 135 disk-shaped Formlabs temporary resins (10 × 2 mm) were produced at three different printing angles (0, 45, and 90 degrees) and post-cured for three different times (20, 40, and 60 min) (n = 15). Color and translucency measurements were taken for each group with a spectrophotometer (VITA Easyshade V). The ΔE values between printing angles and curing times influence each other. The highest color change was observed in the groups produced with a 90° printing angle. Considering the post-curing times, the highest color change was observed in the groups cured for 40 min. Increasing the curing time from 20 to 40 min decreases the translucency, whereas further increasing the curing time does not significantly affect the translucency. In terms of the impact on the translucency caused by the printing angles, 0° exhibited a lower translucency compared to other printing angles. During the 3D printing of temporary prostheses, both printing angles and post-curing times can affect their optical properties.

A NEW TEMPORARY TRAINING PROSTHESIS FOR PEOPLE WITH TRANSTIBIAL AMPUTATION: A TECHNICAL NOTE

BACKGROUND: While waiting to receive a prosthesis, individuals with amputations could benefit from using a temporary training prosthesis to expedite the rehabilitation process and prepare them for subsequent walking with their prosthesis. OBJECTIVES: To design and build a temporary training prosthesis for people with a transtibial amputation. METHODOLOGY: Various temporary training prostheses were designed and simulated using SolidWorks software, followed by fabricating and testing multiple prototypes. Initial tests were conducted on five able bodied subjects without amputation to evaluate comfort, ensure the prototype functioned as intended, and to refine the design. The final prototype design had no weight-bearing on the residual limb end and required the person to wear a shrinker or silicone liner. FINDINGS: SolidWorks simulations showed that the device could tolerate up to 200 kg load. Subjective feedback indicated that body weight is primarily supported by the thigh section, while partially utilizing the patellar tendon and tibial flares. The thigh section can be shifted 5 cm up or down and 2.5 cm to the front or back from the knee joint center (to enhance knee stability or function). Additionally, the thigh angle can be adjusted to 0, 5, 10, or 15 degrees to accommodate hip flexion contracture. The shank section width is adjustable and can be shifted up or down based on the residual limb shape. All five able-bodied participants successfully walked with the non-amputee version of the temporary prosthesis prototype and the device withstood walking, sitting, and standing loads. CONCLUSION: An adjustable temporary training prosthesis was successfully designed, and pilot tested by five able-bodied individuals. Future testing will involve five experienced prosthetic users before conducting trials with individuals with a new transtibial amputation. Layman's Abstract A novel temporary training prosthesis was developed for individuals with new transtibial amputations while they await the healing of their residual limb and the receipt of a prosthesis. Utilizing SolidWorks computer-aided design software, various designs were explored, and rigorous testing was conducted to ensure durability and functionality. Adjustable features were incorporated to accommodate different body shapes and sizes. Initial testing on five people without amputations confirmed device effectiveness in supporting walking, sitting, and standing. Next, performance will be assessed on five experienced prosthetic users before proceeding to trials with individuals with a new transtibial amputation. This temporary prosthesis aims to expedite rehabilitation, enabling people to regain mobility and independence more efficiently. Article PDF Link: https://jps.library.utoronto.ca/index.php/cpoj/article/view/43034/32865 How To Cite: Gholizadeh H, Baddour N, Dudek N, Lemaire E.D. A new temporary training prosthesis for people with transtibial amputation: A technical note. Canadian Prosthetics & Orthotics Journal. 2024; Volume 7, Issue 1, No.2. https://doi.org/10.33137/cpoj.v7i1.43034 Corresponding Author: Hossein Gholizadeh, PhD, CP (Canada)Department of Mechanical Engineering, University of Ottawa, Ottawa, Canada.E-Mails: hgholizadeh@uottawa.ca, gholizadeh87@yahoo.comORCID ID: https://orcid.org/0000-0001-5847-7985

A scoping review of postoperative early rehabilitation programs after dysvascular-related amputations.

After amputation, people face challenges including wound healing and decreased functional mobility. Early mobilization in acute hospital care has proved safe, improved function, and sped discharge. Still, loss of a leg complicates standing and early mobilization after amputation. Approaches to early mobilization and rehabilitation after amputation surgery have not been widely studied. To map the evidence regarding early postoperative mobilization after dysvascular amputation. Specific aims included identifying research designs and populations, describing rehabilitation approaches, and identifying gaps within the literature. Scoping review following PRISMA-Sc guidelines. The a priori scoping review methodology conducted in June 2022 with English language and 20-year limits used the OVID Medline, OVID Allied and Complementary Medicine Database, Cumulative Index to Nursing and Allied Health Literature, Cochrane databases, and Journal of Prosthetics and Orthotics archive. Reviewer pairs used Covidence software to screen for inclusion (subjects with major lower limb dysvascular amputations, seen immediately postoperatively for hospital-based rehabilitation) with decisions by concurrence. Data for best practice scoping reviews were synthesized for analysis. Two hundred ninety-six citations were screened, 13 full texts reviewed, and 8 articles included: 2 cohort studies, 3 case-control studies, 2 single-group interventional studies, and 1 case study. There were no randomized control trials or prospective comparison group trials. Few studies were identified regarding acute rehabilitation after major lower extremity amputation. The limited evidence in this review suggested that early mobilization in the days after amputation was safe with or without use of temporary prostheses, although further research is certainly warranted.

Aesthetic outcomes of different materials for delayed, single-tooth restorations for immediately placed implants. A randomized controlled clinical trial

ObjectivesThe aim of this study is to compare the aesthetic outcomes of metal porcelain (C), lithium disilicate (T1) and porcelain-layered zirconium (T2) immediate implant-supported single crowns in the anterior maxilla. Materials and methodsForty-five immediate dental implants were provided for 45 patients that required the extraction of a single tooth in the anterior maxilla. A temporary prosthesis was provided at 8 weeks after placement followed by the final prosthesis at 24 weeks post-implantation. The patients were randomly allocated into 3 groups: 15 patients in the control group (C) received a metal-porcelain restoration, 15 patients (T1) received a lithium disilicate (LD) restoration and 15 patients (T2) received a porcelain-layered, zirconium (Z) restoration. Pink (PES) and White (WES) esthetic scores, radiographic bone levels, periodontal parameters and patient's esthetic satisfaction using a visual analogue scale (VAS) were evaluated at the time of final restoration placement (t0) and at 12-months post-loading (t12). ResultsNo implants were lost during the duration of this study. Statistically significant higher WES and VAS scores (p < 0.05) were recorded in T1 vs C and T1 vs T2 groups respectively. Similar radiographic bone levels and periodontal parameters were recorded in all groups. ConclusionWithin the limitations of this study, it was concluded that T1 restorations provided better WES outcomes when compared to C restorations and better VAS scores when compared to T2 restorations at 12 months post-loading. Besides, different material interphases did not have an impact in PES, bone levels or periodontal parameters. Clinical relevanceThere is limited data comparing aesthetic outcomes of implant supported single crowns made of different ceramic materials based on accepted and comparable indexes and the evaluation of the patient's perspective regarding these aesthetic outcomes.

A New Full Digital Workflow for Fixed Prosthetic Rehabilitation of Full-Arch Edentulism Using the All-on-4 Concept.

(1) Background: Recent digital workflows are being developed for full-arch rehabilitations supported by implants with immediate function. The purpose of this case series is to describe a new digital workflow for the All-on-4 concept. (2) Methods: The patients were rehabilitated using the All-on-4 concept with a digital workflow including computerized tomography scanning, intra-oral scanning, and CAD-CAM production of the temporary prosthesis, with the 3D printing of stackable guides (base guide, implant guide, and prosthetic guide). The passive fit of the prostheses and the time to perform the rehabilitations were evaluated. (3) Results: The digital workflow allowed for predictable bone reduction, the insertion of implants with immediate function, and the connection of an implant-supported prosthesis with immediate loading. The time registered to perform the full-arch rehabilitations (implant insertion, abutment connection, prosthesis connection) was below 2 hours and 30 min. No passive fit issues were noted. (4) Conclusions: within the limitation of this case series, the digital workflow applied to the All-on-4 concept using stackable base-, implant-, and prosthetic guides constitutes a potential alternative with decreased time for the procedure without prejudice of the outcome.

Short and Extra Short Dental Implants in Osseous Microvascular Free Flaps: A Retrospective Case Series.

There is limited information regarding implant and prosthetic survival after osseous microvascular free flap (OMFF). This case series aims to describe the placement of short and extra short implants in osseous microvascular free flaps to support prostheses, and present an up to 40-month retrospective follow-up. Short and extra short dental implants were placed in six fibula free flaps (FFF) and in two microvascular deep circumflex iliac artery (DCIA) flaps. In total, 27 short and extra short dental implants have been placed into two different types of free flaps. Kaplan-Meyer (K-M) survival analyses were performed to evaluate the survival and success outcomes of implants and prostheses. Out of the eight patients reconstructed with free flap, five were rehabilitated with prostheses, one patient has a temporary prosthesis, and two patients are in the process of prosthetic rehabilitation. Twenty-seven implants were followed up for up to 40 months, and K-M analyses showed 100% implant survival probability (95% confidence interval: 100%), while the implant success probability was 91.0% (95% confidence interval: 68.6-97.7%). Short and extra short dental implants placed in OMFF presented high survival and success rates in a retrospective case series after up to 40 months.

FEATURES OF THE USE OF DENTAL SPLINTS FOR COMPLETE DISLOCATION OF TEETH

Among dental injuries, complete dislocation of a tooth has a prevalence of 1.2 to 14.8% in the permanent dentition, and is defined as a complete displacement of the tooth from the socket with rupture of the fibers of the periodontal ligament. Among the teeth, the upper central incisors are most often affected. Among children aged seven to eleven, boys are more susceptible to this type of injury than girls. This is mostly associated with industrial and auto traumatism and sports activities, protrusion of front teeth, open bite, etc. In such cases, the severity of the damage is higher, the more pronounced the tooth protrusion.&#x0D; The purpose of the study: comparison and analysis of clinical data on the use of rigid and semi-rigid dental splints after tooth replantation under the conditions of its complete dislocation and immobilization time.&#x0D; We conducted a retrospective study of the medical records of 65 outpatient dental patients with complete dislocation of a tooth on the basis of the Poltava Regional Center of Stomatology Dental Clinical Polyclinic.&#x0D; In 26% of cases, a semi-rigid splint was used for 7-10 days, which was fixed with composite resin and a steel wire with a diameter of 0.02 cm. With rigid fixation, a higher degree of bone tissue regeneration in the periodontal space was observed in 57.5% of cases. According to our data, it was established that in relation to dental splints, semi-rigid nylon splints were used in 62% of cases, steel wire in 9%, and restorative material in 18%. According to the received data on the processing and preparation of the tooth for replantation and immobilization, physiological solution is the most suitable medium for storage (62.4%), the ideal extraalveolar time period was 25-27 minutes (58.5%), while the teeth were in a dry place within 10 minutes after storage in physiological solution. Due to the presence of serious inflammatory root resorption, which demonstrates a connection with the periodontal tissue associated with increased tooth mobility, in 27.6% of cases an intervention regarding extraction, use of a temporary prosthesis, followed by prosthetics with adhesive materials is chosen. Autotransplantation is used in 12.9% of cases and is positioned as an alternative for replacing missing incisors. However, this method has limitations, as the root of the donor tooth must be 2/3 formed, in addition to anatomical problems, where approximately 60% of autografted teeth are dissimilar in appearance in terms of asymmetric gingival width or color mismatch.&#x0D; When evaluating pulp and periodontal tissue regeneration for permanent teeth, the best results were observed with the use of platelet-rich plasma, especially for incisors, with separation after more than 8 hours of extraoral storage of the tooth and delayed replantation. The obtained data allow us to state that several factors can influence the success of replantation: the duration of the injury, the extra-alveolar period of permanence, means of preservation, contamination, manipulation and condition of the extracted tooth, the type of splint used and the time of application.&#x0D; Conclusion. Based on a retrospective analysis of medical records and literature data, it can be stated that after replantation, the use of a splint is mandatory to ensure immobilization of the teeth in the initial period, which is necessary for the restoration of the periodontal ligament.

Clinical Applications of 3D-Printed Polymers in Dentistry: A Scoping Review.

The aim of this scoping review is to categorize 3D-printing applications of polymeric materials into those where there is evidence to support their clinical application and to list the clinical applications that require a greater evidence base or further development before adoption. An electronic search on PubMed, EMBASE, Scopus (Elsevier), and Cochrane Library databases was conducted, including articles written in English and published between January 2003 and September 2023. The search terms were: ((3D printing) OR (3-dimensional printing) OR (three dimensional printing) OR (additive manufacturing)) AND ((polymer) OR (resin)) AND (dent*). Case reports, in vitro, in situ, ex vivo, or clinical trials focused on applications of 3D printing with polymers in dentistry were included. Review articles, systematic reviews, and articles comparing material properties without investigation on clinical application and performance/accuracy were excluded. The search provided 3,070 titles, and 969 were duplicates and removed. A total of 2,101 records were screened during the screening phase, and 1,628 records were excluded based on title/abstract. In the eligibility phase, of the 473 full-text articles assessed for eligibility, 254 articles were excluded. During the inclusion phase, a total of 219 studies were included in qualitative synthesis. There is lack of clinical evidence for the use of 3D-printing technologies in dentistry. Current evidence, when investigating clinical outcomes only, would indicate non-inferiority of 3D-printed polymeric materials for applications including diagnostic models, temporary prostheses, custom trays, and positioning/surgical guides/stents.

The Scalloped Surgical Guide as an Alternative to Flat Bone Reduction Guide in Full-arch Implant Restoration.

The goal of this clinical report was to present an alternative to traditional flat bone reduction guides, using a custom-designed 3D printed guide according to the future gingival margin of the planned dentition. A 61-year-old female with concerns regarding her smile appearance was presented. The initial examination revealed excessive gingival show accompanied by excessive overjet. The dentition was in a failing situation. The proposed treatment plan, relying on the sufficient amount of bone and keratinized tissue, consisted of re-contouring of the alveolar ridge and gingiva and placement of six implants and a FP-1 prosthesis after extraction of all remaining maxillary teeth. Digital smile design was completed, and a fully-digitally-guided surgery was planned. This consisted of utilizing three surgical guides. Starting with the fixation pin guide and continuing with the scalloped hard and soft tissue reduction guide and finally, the implant placement template. Following the surgery, the patient received a temporary restoration and on the 4-month follow-up, a new poly-methyl meta-acrylate temporary prosthesis was delivered. The patient's 7-month follow-up is presented in the paper. The report of this triple-template guided surgery indicated that digital 3D planning is a considerably predictable tool to properly establish and evaluate future occlusal plane, smile line, and lip support. Scalloped guides seem to be an excellent alternative to conventional bone reduction guides since they require less bone removal and improve patient comfort during surgery.

Fit and Strength of a Three-Unit Temporary Prosthesis Made by Different Manufacturing Techniques: An In Vitro Study.

To compare the fit and fracture load of temporary fixed partial prostheses fabricated by means of a conventional direct technique, milling, or 3D printing. A maxillary right first premolar and molar were prepared on a Frasaco cast, which was then duplicated 40 times. In total, 10 provisional three-unit fixed prostheses (Protemp 4, 3M) were made using the conventional technique with a putty mold. The 30 remaining casts were scanned to design a provisional restoration using CAD software. A total of 10 designs were milled (CEREC MC X5/shaded PMMA Disk, Dentsply Sirona), while the other 20 were 3D printed with one of the two 3D printers (Asiga UV MAX or Nextdent 5100, C&B, Nextdent). Internal and marginal fit were examined using the replica technique. Next, the restorations were cemented on their respective casts and loaded until fracture using a universal testing machine. The location and propagation of the fracture were also evaluated. 3D printing demonstrated the best internal fit. Nextdent (median internal fit: 132 μm) was significantly better compared to the milled (median internal fit: 185 μm; P = .006) and conventional restorations (median internal fit: 215 μm; P < .001), while the fit of Asiga (median internal fit: 152 μm) was only significantly better than the conventional restorations (P < .012). The lowest marginal discrepancy was found for the milled restorations (median marginal fit: 96 μm), but this was only significant when compared to the conventional group (median internal fit: 163 μm; P < .001). The conventional restorations demonstrated the lowest fracture load (median fracture load: 536 N), which was only significant when compared to Asiga (median fracture load: 892 N; P = .003). Within the present in vitro study's limitations, CAD/CAM demonstrated superior fit and strength compared to the conventional technique.

Prototype importance for implant supported zirconia bridges: a case report

Biocompatible esthetic restorations are necessary in order to obtain successful results with implant therapy. Monolithic zirconia is a more recently offered option to PFM and zirconia-ceramic prosthesis. The optical properties of zirconia have been greatly enhanced, approaching those of ceramics, while the monolithic nature of the prosthesis reduces the chance of fracture or chipping and improves its structural properties. The major drawback of theses zirconia is mechanical and thermal problems that encountered when zirconia is exposed to hydrothermal aging due to the transformation of the metastable tetragonal zirconia into the monoclinic form. This case report describes 45 aged adult female patient with anterior maxillary mobile teeth, after clinical and radiographical examination, extraction and socket preservation were done at periodontal department, 6 months later implant installed and after 3 months of healing, the patient referred to prosthodontic department. Screw retained temporary prosthesis were fabricated, composite build up were done intraorally for the temporary prosthesis to achieve the esthetic and functional occlusion. Cement retained implant supported fixed prosthesis using monolithic zirconia were cemented and no occlusal adjustment is needed thanks to the adjusted temporary prosthesis which served as prototype for a zirconia bridge with functional occlusion.

All-on-4 Implants Supported Prosthesis with a Digitalized Approach: A Case Report of Maxillary Jaw Rehabilitation with a Temporary Prosthesis

In modern times, patients have a preference for fast treatment options and fixed restorations, particularly when compared to older patients. The field of fixed reconstructions on implants has witnessed significant advancements, providing a diverse array of treatment options for various situations. However, despite the numerous aesthetic and functional benefits, there is currently a lack of well-defined clinical guidelines regarding the ideal number of implants, loading type, and reconstruction methods. Although there are some existing recommendations, it is crucial to consider the influence of micro/macroscopic factors when determining treatment plans and surgical approaches for each unique case. In this specific case report, we describe the rehabilitation of the upper jaw of a 36-year-old patient. The treatment plan was devised with the objective of not only addressing the patient's immediate needs but also considering potential future requirements in the lower jaw. Special attention was given to the patient's existing dentition and possible risk factors. Furthermore, the plan included the utilization of a 3Shape intraoral scanner (Trios 3) device to digitally capture the impression phase. Additionally, careful consideration was given to the patient's current dentition and possible risk factors. Despite the widespread use of intraoral scanners in dental practice, their role remains somewhat limited due to insufficient significant results and the uncertainty that may arise when using them during surgical procedures. However, in this specific case report, the Trios 3Shape scanner showcased a high level of accuracy, resulting in streamlined workflow and reduced work time. Overall, the outcomes were satisfactory for both the patient and the dental team involved.

Fabrication of definitive complete-arch implant-supported fixed prosthesis in upper and lower completely edentulous patient using temporary prosthesis scan: a case report

Fabrication of definitive complete-arch implant-supported fixed prosthesis in upper and lower completely edentulous patient using temporary prosthesis scan: a case report

Порівняльний аналіз стану опорних тканин при використанні різних ортопедичних конструкцій для негайного навантаження на дентальних імплантатах при втраті зубів на одній із щелеп

Abstract. The use of fixed prosthetic structures supported by implants in case of partial or complete tooth loss remains relevant. Thanks to the use of intraoral welding of temporary prosthesis elements, the method of manufacturing temporary prosthetic structures has been integrated into the practice of prosthetic dentistry, which allows them to be fixed during dental implantation surgery. The aim of the study is to compare the condition of supporting tissues when using different orthopedic structures for immediate loading on dental implants in case of partial or complete loss of teeth in one of the jaws. For the comparative evaluation of different orthopedic structures on implants for immediate loading, temporary structures made of polymethyl methacrylate, composite structures reinforced with metal beams using intraoral welding, acrylic structures with dentures reinforced with a cast beam were selected. Computed tomography and orthopantomography were used to assess the condition of the bone tissue before implantation, 3 days and 1, 6, months after implantation. The study resulted in the following conclusions. Restoration of complete tooth loss in one of the jaws with fixed orthopedic composite structures reinforced with metal beams using intraoral welding is a promising method that allows to reduce the time of patient rehabilitation, the number of surgical stages and the trauma of the surgical stage of treatment. In this regard, soft and bone tissue trophism is less disturbed, which affects the subsequent osseointegration and functioning of implants. At the same time, the risks of bone resorption are minimized. Clinical evaluation of the tissues around the implants and X-ray analysis of the bone in patients with acrylic structures with set teeth reinforced with cast metal beams showed almost similar results. However, the technique involves additional surgical intervention, which negatively affects the trophism and healing of soft and bone tissues, increases the risk of complications, and extends the rehabilitation period. The use of temporary structures made of polymethyl methacrylate is less appropriate due to their less stable fixation, which can lead to inflammation of the soft tissues surrounding the implants and bone resorption. Key words: fixed structures, occlusal relations of the jaws, digital technologies, dental implantation.

Translucent monolithic zirconia titanium-supported FP1 full-arch prosthesis: A novel proof of concept to address esthetic, functional, and biologic challenges.

Despite the wide clinical use of translucent zirconia for full-arch implant prostheses, reduced flexural strength and fracture toughness compared with high-strength opaque zirconia needs to be addressed. A novel proof of concept for FP1 full-arch prosthesis featured by translucent monolithic zirconia and titanium framework was presented. Computer-guided implant planning and surgery were executed and digitally designed FP1 temporary prosthesis prefabricated. Implant and prosthetic placement were achieved with a set of three-dimensional (3D)-printed templates. Implants were immediately loaded. After 4 months intraoral optical scan was taken to record implant coordinates, soft tissue anatomy, and temporary FP1 prosthesis. A novel digital workflow was used to design and mill overlaying translucent zirconia and anatomically shaped titanium framework with a scalloped soft-tissue interface. Final FP1 prosthesis was assembled cementing zirconia jacket on titanium counterpart. Translucent zirconia supported by titanium framework can address esthetic and mechanical requirements of FP1 full-arch prosthesis, minimizing risk of fracture and providing a rigid and passive joint with supporting implants. The smooth and highly polished titanium surface with an anatomic design, tightly matching scalloped soft tissue interface, can limit food impaction, air and saliva leakage and contribute to overall biologic integration of FP1 full-arch prosthesis. Translucent monolithic zirconia featured with anatomically shaped titanium framework with scalloped transmucosal part, combining a pleasant esthetic outcome with increased flexural strength and fracture toughness, may be indicated to increase the clinical performance of FP1 full-arch prosthesis.