Telescopic Prosthesis Research Articles

Application of polyether ether ketone in obturator telescopic prosthesis fabrication: A case report

Introduction. The retention, stability, and plaque resistance of the obturator prosthesis significantly impact the improvement of the patient?s quality of life. The aim of this paper was to draw attention to the benefits of telescopic obturator prostheses made of polyether ether ketone (PEEK). Case report. We present an approach to the telescopic obturator fabrication using PEEK as the material of choice for the primary and secondary telescopic crowns, which are an integral part of the framework, in a 65-year-old patient with partial maxillectomy. The positioning of the teeth was made with a silicone key, and the featuring of the gingival part of the prosthesis was performed by a composite. Conclusion. PEEK is a polymer with good mechanical and chemical properties besides being bio-compatible. An obturator prosthesis made of this material does not incur enormous fabrication costs, and its satisfactory functionality contributes to the improvement of patients? lives.

Rehabilitación mediante prótesis telescópica en un paciente periodontalmente comprometido

Rehabilitación mediante prótesis telescópica en un paciente periodontalmente comprometido

Telescopic Hybrid Denture Prosthesis with Anterior Metal Ceramic Crowns

While restoring patients with poor oral hygiene, it is mandatory to consider the self-cleansing ability of the prosthesis to reduce...

Full arch fixed prostheses vs. full arch telescopic-retained retrievable prostheses both supported by implants and natural tooth abutments in periodontally treated patients: Results at 15 years.

BackgroundThe clinical outcome of full arch fixed prostheses vs. full arch telescopic-retained retrievable prostheses supported by implants and natural tooth abutments in periodontally treated patients has been reported by few studies, with controversial results. The objective of this study was to evaluate long-term (15 years) complications of abutment teeth and dental implants in periodontally treated patients, rehabilitated with full arch telescopic-retained retrievable prostheses (TRP)s vs. full arch fixed prostheses (FP)s supported by teeth and implants.Material and MethodsAfter active periodontal therapy (non-surgical and surgical), and implant placement (replacement of hopeless teeth and in edentulous sites), 18 patients were rehabilitated in both dental arches with full arch TRPs, and 17 patients were rehabilitated with full arch FPs. Patients were annually recalled for technical and/or biological complications monitoring.ResultsDuring the 15-year observation period, 29 of 164 (17.6%) implants failed in the TRP group and 26 of 152 (17.1 %) implants in the FP group. Due to progression of periodontal disease, endo-perio untreatable lesion and caries, 22 of 233 abutment teeth were extracted (8.1) % in the TRP group and 23 of 221 (10.4%) abutment teeth were extracted in the FP group. Difference in implant failures and abutment teeth loss between the two groups were found not statistically significant (p >0.05). Poisson regression analysis showed that in both groups, factors such as smoking habits, FMBS>20, number of pockets >6 mm, mean bone loss, and bone loss/age, contribute to tooth and implant failure (p<0.05).ConclusionsIn this clinical study, in periodontally treated patients, full arch telescopic-retained retrievable prostheses, and full arch fixed prosthesis, supported by teeth and implants presented comparable long-term results of tooth loss and implant failure, if regular periodontal therapy is implemented. Key words:Periodontal disease, implants, tooth-implant connection, telescopic prosthesis, fixed prosthesis.

Effect of Unilateral Mandibular Implant-Tooth Supported Telescopic Prosthesis on the Supporting Structures (In Vitro Study)

Effect of Unilateral Mandibular Implant-Tooth Supported Telescopic Prosthesis on the Supporting Structures (In Vitro Study)

A Simple Technique for Accurate Transfer of Secondary Copings in a Tooth-Supported Telescopic Prosthesis.

Residual ridge resorption is a rapid, progressive, irreversible, and inevitable process of bone resorption. Long-standing teeth and implants have been shown to have maintained the bone around them without resorption. Thus, overdenture therapy has been proven to be beneficial in situations where few remaining teeth are present. In addition to the various advantages seen with tooth-supported telescopic overdentures, a few shortcomings can also be expected, including unseating of the overdenture, increased bulk of the prosthesis, secondary caries, etc. The precise transfer of the secondary telescopic copings to maintain the spatial relationship, without any micromovement, remains the most critical step in ensuring the success of the tooth-supported telescopic prosthesis. Thus, a simple and innovative technique of splinting the secondary copings was devised to prevent distortion and micromovement and maintain its spatial relationship.

Most na teleskopima oblikovan s mogućnošću preinake fiksno-mobilnog nadomjestka: prikaz slučaja

This clinical report describes a fixed maxillary telescopic dental prosthesis (FTDP) employing milled base metal copings and a metal superstructure veneered with composite resin, for the restoration in a periodontally compromised patient with uncontrolled diabetes. The telescopic prosthesis framework design incorporated occlusal rest seats in key positions along the arch in case of future posterior tooth loss, in order to be converted to fixed - removable combination prosthesis. The mandible was restored with a conventional fixed ceramo-metal dental prosthesis.

Long term clinical outcome of dental implants placed in a patient with Singleton–Merten syndrome

PatientsSingleton–Merten syndrome is an extremely rare autosomal dominant condition with less than 10 reported cases in the literature. It is characterized by abnormal aortic calcifications and dental abnormalities. The goal of this case report is to discuss the abnormal oral clinical features and the modified treatment protocol that was used in order to achieve osseointegration of dental implants in a patient having abnormal bone density and bone turnover associated with Singleton–Merten Syndrome. DiscussionFollowing extraction of the remaining teeth, titanium implants (Friadent GmbH, Mannheim, Germany and Straumann®, Basel, Switzerland) were placed in the upper and lower jaw of the patient. The upper jaw which was treated with dental implants, received a bar supported implant retained prosthesis and the lower jaw an implant retained telescopic prosthesis. The patient was regularly followed up for the past 13 years during which, clinical and radiological evaluation of osseointegration was undertaken. All the loaded implants showed clinical and radiographic evidence of osseointegration. With a follow up of 13 years after insertion of the first implant, the patient reported functioning well with no complications. ConclusionThe treatment with dental implants in the extremely rare Singleton–Merten syndrome patients is a reasonable treatment option to rehabilitate maxillofacial aesthetics and establish normal function of the jaws.

Minimal Invasive Circumferential Management of Thoracolumbar Spine Fractures.

Introduction. While thoracolumbar fractures are common lesions, no strong consensus is available at the moment. Objectives. The aim of this study was to evaluate the results of a minimal invasive strategy using percutaneous instrumentation and anterior approach in the management of thoracolumbar unstable fractures. Methods. 39 patients were included in this retrospective study. Radiologic evaluation was based on vertebral and regional kyphosis, vertebral body height restoration, and fusion rate. Clinical evaluation was based on Visual Analogic Score (VAS). All evaluations were done preoperatively and at 1-year follow-up. Results. Both vertebral and regional kyphoses were significantly improved on postoperative evaluation (13° and 7° versus −1° and −9° P < 0.05, resp.) as well as vertebral body height (0.92 versus 1.16, P < 0.05). At 1-year follow-up, mean loss of correction was 1°. A solid fusion was visible in all the cases, and mean VAS was significantly reduced form 8/10 preoperatively to 1/10 at the last follow-up. Conclusion. Management of thoracolumbar fractures using percutaneous osteosynthesis and minimal invasive anterior approach (telescopic vertebral body prosthesis) is a valuable strategy. Results of this strategy offer satisfactory and stable results in time.

Prosthodontic rehabilitation of non-syndromic oligodontia case with telescopic prosthesis

Oligodontia is the congenital absence of six or more permanent teeth excluding the third molars. Oligodontia of permanent dentition is a rare occurrence. Preservation of the remaining deciduous dentition in such situations is important for both functional and esthetic rehabilitation of the patient. This case report describes the rehabilitation of a 16 year old male with oligodontia of permanent teeth treated by an interdisciplinary team of Prosthodontist, paedodontist and orthodontist. Endodontic treatment of all the remaining deciduous dentition was done. Vertical dimension of deciduous dentition occlusion was assessed. Full mouth single piece porcelain fused to metal telescopic prosthesis for maxillary and mandibular arch was planned with minimal increase in vertical dimension of occlusion. Telescopic prosthesis provided excellent retention, stability, esthetics and stress equalization on the remaining deciduous dentition. Maintenance of oral hygiene procedures was simplified for the adolescent with the telescopic prosthesis. Preservation of remaining deciduous dentition and fabrication of a telescopic prosthesis in this patient provided an effective aesthetic and functional rehabilitation for the patient.

Surgical and implant‐supported fixed prosthetic treatment of a patient with ectodermal dysplasia: a case report

Ectodermal dysplasia (ED) is a hereditary disorder that affects ectodermal structures. The main clinical oral manifestations of ED include oligodontia and deficient alveolar ridges. This case report presents the oral rehabilitation of a 15-year-old female patient who never received an accurate diagnosis or appropriate dental care. Treatment included a combination of surgical intervention, a maxillary tooth-supported fixed detachable telescopic prosthesis, and an implant-supported mandibular fixed partial denture. The results showed a significant improvement in the esthetics, function, and psychological status of the patient. This article stresses the importance of appropriate care in providing an acceptable quality of life for patients with ED.

Implantable miniature telescope: Lessons learned

Background The Implantable Miniature Telescope (IMT™) is a telescopic prosthesis that, combined with the optics of the cornea, constitutes an intraocular magnifying system. It is indicated for use in patients with stable, nonfoveal sparing, bilateral, stable, age-related macular degeneration (end-stage) with associated scotomas. The telescope prosthesis is implanted in only one of the patient's eyes. In this way, the implanted eye provides improved visual acuity, and the nonimplanted eye continues to provide peripheral vision for ambulation. Two hundred seventeen patients with end-stage AMD were enrolled in a prospective, multicenter, open-label trial (IMT-002) beginning in 2003. The implanted eye was the worse eye for most patients based on a selection rule set by the U.S. Food and Drug Administration (FDA) protocol; however, in most cases (90%), visual acuity improvement goals were met with the device. This report will retrospectively look at 2 selected patients implanted at the Emory Eye Center in Atlanta as part of that trial to derive lessons for subject and eye selection criteria. Case Reports Two cases were selected to represent patients' levels of functional success and satisfaction. Determination of their visual and functional outcome at 1-year postimplantation was based on best-corrected visual acuity and the National Eye Institute Visual Functioning Questionnaire 25-Item quality-of-life survey. Four years after implantation, 1 patient continued to use the telescope prosthesis eye for all visual activities; the other patient did not perceive any benefit from the device and continued to primarily use the fellow nonimplanted eye. The benefit of the telescopic prosthesis was most likely accounted for by the level of visual acuity in both eyes postimplantation and eye dominance. Conclusion Proper eye selection chosen for implantation with the telescope prosthesis appears to be an important if not critical factor in determining patient satisfaction for visual processing and functional success. Based on the author's experience with the IMT, optometrists can aid the multidisciplinary team by preoperatively determining which eye, if implanted, offers the optimal potential functional benefit for appropriate candidates.

陶材前装コーヌスクローネ用合金に関する研究 第１報 多目的用金合金の焼付強度

Multi-purpose gold alloys (Degunorm, Degudent LTG) were investigated as casting metal for conical double-crown telescopic prosthesis. Bond strength between porcelain and metal was compared to conventional ceramo-metal system. In addition, bond strength with some four treatments was also examined. The results were as follows:1. Bond strength of multi-purpose gold alloy with its original low-fused porcelain was similar to those of conventional dental porcelain-fused metal.2. Bond strength of Degunorm painted bonding agent after sandblasting showed the highest value under all test conditions in this study.3. According to SEM observation, body-opaque interface after firing was definite. However, bondingopaque interface was not distinguishable.4. The values of Vickers hardness (Hv) for body, opaque and bonding porcelain were 712, 325 and 468respectively.5. Particle size of opaque porcelain was approximately 50 pm, and was coarser than that of bonding porcelain.6. Leucite was detected in all of porcelain powders before firing. However, the leucite peak of body powder drawn in the X-ray diffraction chart was not obviously steep because it was amorphous.

ポーセレン前装コーヌステレスコープ用合金に関する研究 第５報 鋳造条件の違いが鋳造性および陶材焼付強度に及ぼす影響について

ポーセレン前装コーヌステレスコープ用合金に関する研究 第５報 鋳造条件の違いが鋳造性および陶材焼付強度に及ぼす影響について

ポーセレン前装コーヌスクローネ用合金に関する研究 第４報 チタン含有コバルトクロム合金へのＺｒ添加による物理的性質，焼付強度について

To develop porcelain-facing alloys for conical double-crown telescopic prosthesis, several alloys were manufactured by adding 0.5%, 1.0%, 1.5% Zr to a Co-Cr alloy containing 2% titanium.Physical and mechanical properties and the bond strength of these alloys were examined to investigate the optimal amount.The following results were obtained:1. Oxidation at the melting point of the alloy were reduced by the addition of Zr.2. The value of Vickers hardness were reduced by the addition of Zr.3. The value of contraverse strength and elastic constant were reduced by the addition of Zr.4. The bond strength was increased by the addition of 0.5% Zr, and the optical value was obtained at 1, 050° under reduced pressure.5. The optimal additional amount was 0.5% for porcelain-facing alloys for conical double-crown telescopic prosthesis.6. The bond strength was increased by the addition of Zr, because the form of Cr2Co3and CoO at the oxide layer were restrained.

ポーセレン前装コーヌス・テレスコープ用合金に関する研究 第３報 Ｔｉ含有Ｃｏ‐Ｃｒ合金への微量元素添加による物理的性質，焼付強度

To develop porcelain-facing alloys for conical double-crown telescopic prosthesis, we manufactured several alloys by adding one of four elements (Zr, B, V, and W) to the Co-Cr alloy containing 2% titanium. The physical and mechanical properties and the bond strength of these alloys were examined.As the result, the following were obtained:1. The addition of boron markedly lowered the melting point of the alloy. It is difficult to use boron in the porcelain-facing alloy.2. The addition of wolfram adversely affected the physical and mechanical properties of the alloy.3. The addition of zirconium caused no marked change in the physical or mechanical properties of the alloy.4. The addition of vanadium altered the tensile strength of the alloy, without markedly affecting any other property of the alloy.5. The addition of all 4 elements reduced oxide formation.6. The structure of the cast alloy was altered by the addition of B; however, it was not possible to presume any relationship between this change and the physical or mechanical properties.7. The bond strength was elevated by the addition of zirconium (in particular when fusing porcelain to metal at 1, 050°C under reduced pressure).This change was accompanied by improved desquamation.