Load bearing capability of three-units 4Y-TZP monolithic fixed dental prostheses: An innovative model for reliable testing

In this work, three-units monolithic fixed dental prostheses (FDPs) have been analysed and a novel model for reliable testing has been proposed. Such model is based on a new design of the polymeric base of the FDP, realised via additive manufacturing (AM) - a solution that conveys at the same time quick manufacturability, low cost, custom-ability, and design freedom. By means of this new model, the load-bearing capability of three-units monolithic FDPs has been thoroughly tested; in particular, three different analyses were performed: (i) analytical with a beam-like model, (ii) numerical, using non-linear three-dimensional Finite Elements (FE) models and (iii) experimental, by static bending test. The FDPs considered in this work were manufactured using a fourth-generation zirconia, namely 4Y-TZP. The findings demonstrated the undoubted advantages of the new base configuration, which minimized the effect of the base (which as a matter of fact is absent in in-vivo conditions) on the stress state of the connectors in the FDPs, and increased the repeatability and reliability of the experimental bending tests, able to determine the load bearing capability of the 4Y-TZP FDPs

Long-term short implants performance: Systematic review and meta - Analysisofthe essential assessment parameters

Lack of standard criteria in the outcome assessment makes it difficult to draw conclusions on the clinical performance of short implants and, under these circumstances, determine the reasons for implant failure. This study evaluated, through a systematic review of the literature and meta-analysis, the essential parameters required to assess the long-term clinical performance of short and extra-short implants. Electronic databases (Pubmed- MEDLINE, Cochrane Library Database, Embase, and Lilacs) were searched by two independent reviewers, without language limitation, to identify eligible papers. References from the selected articles were also reviewed. The review included clinical trials involving short dental implants placed in humans, published between January 2000 and March 2014, which described the parameters applied for outcome\u2019s measurements and provided data on survival rates. Thirteen methodologically acceptable studies were selected and 24 parameters were identified. The most frequent parameters assessed were the marginal bone loss and the cumulative implant survival rate, followed by implant failure rate and biological complications such as bleeding on probing and probing pocket depths. Only cumulative implant survival rate data allows meta-analysis revealing a positive effect size (from 0.052 (fixed) to 0.042 (random)), which means that short implant appears to be a successful treatment option. Mechanical complications and crown-to-implant (C/I) ratio measurement were also commonly described, however, considering the available evidence; no strong conclusions could be drawn since different methods were used to assess each parameter. By means of this literature review, a standard evaluation scheme is proposed, being helpful to regiment further investigations and comparisons on future studies

IMPIANTO POST-ESTRATTIVO IMMEDIATO DEL DENTE SINGOLO NEL SETTORE ESTETICO: ANALISI DEI FATTORI DI RISCHIO E CRITERI DI SELEZIONE DELLE COMPONENTI PROTESICHE

L'eccellenza estetica implanto-protesica dell'elemento singolo nella regione estetica e' una delle procedure cliniche piu' complesse anche per gli operatori esperti.Con questo lavoro ci proponiamo di evidenziare alcuni passaggi chiave nella gestione implanto-protesica del monoimpianto post-estrattivo immediato

Estetica in protesi fissa: traslucenza e opacità

Vedasi l'allegat

FIXED IMPLANT REHABILITATION PASSIVATED WITH OVERDENTURE ATTACHMENTS: PRELIMINARY RESULTS

THE PURPOSE OF THIS PROSPECTIVE CLINICAL STUDY WAS THE EVALUATION OF THE RELIABILITY OF FIXED IMPLANT SUPPORTED FULL-ARCH REHABILITATIONS PASSIVATED BY A NEW TYPE OF ATTACHMENT BUILT ORIGINALLY FOR THE OVERDENTURE PROSTHESIS (RHEIN83 EQUATOR PROFILE ATTACHMENT

PROSPECTIVE CLINICAL EVALUATION OF RHEIN83 EQUATOR PROFILE FIXED IMPLANT REHABILITATIONS

Objectives: The purpose of this prospective clinical study was the evaluation of the reliability of implant supported full-arch rehabilitations with the innovative Rhein83 Equator Profile Attachment. The evaluation regard: patient's satisfaction, number of technical passages, prosthetic complications, survival rates. Methods: The 10 participating patients (3 males, 7 females, mean age 68±10years) with implant rehabilitations retained by innovative Rhein83 Equator Profile Attachment participated in this clinical study. From 5 to 7 implants were placed in edentulous arch. Fixed Provisional rehabilitations are loaded immediately. Fixed Definitive rehabilitation was realized 6 weeks after implantation.Patients' satisfaction was evaluated with a questionnaire with a VAS from 1 to 5. Survival rates and prosthetic maintenance procedures or complications were also recorded during the follow-up period. Results: Patient satisfaction was 4,42±0,40. The number of technical passages and time of realization resulted significantly reduced compared to conventional procedures. During a mean observation time of 12±2 months no implant was lost and no periimplantitis occurred (100% survival rate). Maintenance: No prosthetic complication occurred. Conclusion: Within the limitations of this study, it can be concluded that the number of technical passages and time of realization significantly reduced plays a significant role on overall patient satisfaction with implant fixed rehabilitation. This new type of attachment appears to be promising

New findings in the diagnosis and treatment of primary angle-closure glaucoma

Glaucoma is the second cause of blindness worldwide. In the next years, approximately one-fourth of all glaucoma cases will be angle-closure types. Older age, female sex, and Asian ethnicities are described risk factors as well as shorter axial length, shallow anterior chamber depth, lens position, and thickness. New findings suggest iris volume and choroidal thickness to have a key role in the mechanisms of angle closure. Classical clinical conditions are acute, intermittent, and chronic forms. Ultrasound biomicroscopy and anterior segment optical coherence tomography contribute to a better understanding of the mechanisms of angle closure, helping the ophthalmologists in the diagnosis and treatment. The therapy includes laser iridotomy, argon laser peripheral iridoplasty, lens extraction, goniosynechialysis, filtering surgery, drainage implant, and cyclodestruction

EVALUATION OF PATIENT'S SATISFATION WEARING INNOVATIVE RHEIN83 EQUATOR IMPLANT OVD

Objectives: The purpose of this prospective clinical study was the evaluation of satisfaction of patients treated with an implant supported overdenture with the innovative Rhein83 Equator Profile Attachment. The evaluation regard: comfort, retention, stability, ability to chew(function), prosthetic complications, survival rates. Methods: The 10 participating patients (4 males, 6 females, mean age 68\ub110years) wearing mandibular implant overdentures retained by innovative Rhein83 Equator Profile Attachment participated in this clinical study. From 2 to 3 implants were placed in edentulous mandible. Prosthetic rehabilitation was realized 6 weeks after implantation. Patients' satisfaction was evaluated with a questionnaire regarding: comfort, ability to chew (function) with a VAS from 1 to 5. Survival rates and prosthetic maintenance procedures or complications were also recorded during the follow-up period. Results: Comfort: it passed from 1,28\ub10,44 before treatment to 4,37\ub10,51 after. Ability to chew: it passed from 2,1\ub10,83 before treatment to 3,78\ub10,74 after. During a mean observation time of 12\ub13 months no implant was lost and no periimplantitis occurred (100% survival rate). Maintenance: No loose abutment or fractured tooth occurred, while 1 relining was necessary. Substitution of the resilient component is made routinely every year. Conclusion: Within the limitations of this study, it can be concluded that implant retention may play a significant role on overall patient satisfaction with implant overdenture. This new type of attachment appears to be promising