Κυριακή 1 Ιανουαρίου 2023

Single‐retainer all‐ceramic resin‐bonded fixed dental prostheses: Long‐term outcomes in the esthetic zone

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Abstract

Objectives

To present an update on the concept of cantilevered single-retainer all-ceramic resin-bonded fixed dental prostheses (RBFDPs) first presented 25 years ago in the Journal of Esthetic Dentistry.

Overview

The initially presented case of the concept was followed clinically over 26 years and is presented along with two additional clinical long-term cases using varying methods to obtain an esthetic and hygienic ovate pontic design. Veneered alumina and zirconia ceramic (3 mol% yttria–tetragonal zirconia polycrystalline ceramic; 3Y-TZP) was used and bonded with a phosphate monomer containing luting resin after 50 μm alumina particle air-abrasion at 0.25 MPa pressure. The restorations replacing incisors did not debond and soft tissues in the pontic area were maintained over 26 years.

Conclusions

Cantilevered single-retainer all-ceramic RBFDPs today made from veneered 3Y-TZP zirconia ceramic can be considered a standard of care for the replacement of single incisors and provide an excellent esthetic outcome with a long-term preservation of soft tissues in the pontic area.

Clinical Significance

Bonding nonretentive oxides ceramics such as alumina and zirconia ceramic with phosphate monomer containing luting resins after alumina particle air-abrasion is durable over decades. This proves that bonding to zirconia ceramic is not of any problem when adequate methods are used. Single-retainer zirconia ceramic RBFDPs maintain soft tissues in the edentulous area of single missing incisors and often deem implants unessential for this indication.

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Soft tissue esthetics around immediately provisionalized delayed implants with and without connective tissue graft: A randomized clinical trial pilot study

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Abstract

Objective

Evaluate the peri-implant soft tissue esthetics following a single, immediately provisionalized, delayed implant with/-out subepithelial connective tissue graft (SCTG).

Material and Methods

The eligible patients were randomized into two groups. Immediate provisionalization was performed with (test group: SCTGG) or without SCTG (control group: NGG). The soft tissue esthetics was assessed by Pink Esthetic Score (PES) and Mucosal Scarring Index (MSI), at 6 and 12 months, following final implant restoration.

Results

The SCTGG, compared to NGG, yielded a 0.2 increased PES at 12 months (95% confidence interval (CI): −1, 1.4) and a 0.2 decreased MSI score (95% CI −0.9, 0.5) with no statistically significant differences in PES and MSI between both groups (p > 0.05).

Conclusion

Soft tissue grafting around immediately provisionalized delayed implants could exhibit comparable results to immediate provisionalization alone in terms of peri-implant soft tissue esthetics using PES and MSI (ClinicalTrials.gov Identifier: NCT03770975).

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Neurotization of the radial forearm free flap improves swallowing outcomes in hemiglossectomy defects

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Abstract

Background

We examined the effect of free tissue neurotization on speech and swallowing outcomes for patients undergoing reconstruction of hemiglossectomy defects with a radial forearm free flap (RFFF).

Methods

A retrospective study was performed in patients with oral cavity squamous cell carcinoma undergoing a hemiglossectomy and reconstruction with a RFFF. Functional outcomes including nutritional mode, range of liquids and solids, and speech understandability were analyzed 1-year post-treatment.

Results

Eighty-four patients were included in this analysis, 41 of whom had neurotized flaps (49%). No significant differences in demographic or clinical variables were seen between the neurotized and non-neurotized groups. On multivariate analysis controlling for BMI, flap area, and N-classification, patients with neurotized flaps were significantly more likely to have normal range of liquids and solids and less likely to have a G-tube.

Conclusions

Neurotization of RFFF reconstructing hemiglossectomy defects results in decreased G-tube dependence and improved range of liquids and solids.

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Role of mechano-sensitive non-coding RNAs in bone remodeling of orthodontic tooth movement: recent advances

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Orthodontic tooth movement relies on bone remodeling and periodontal tissue regeneration in response to the complicated mechanical cues on the compressive and tensive side. In general, mechanical stimulus regu...
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Managing Oromandibular Hardware Failure after Free Flap Surgery

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Semin Plast Surg
DOI: 10.1055/s-0042-1760289

Hardware failure after oromandibular reconstruction using free tissue transfer can delay additional therapies directed at cancer treatment and prevent patients from returning to normal oral function. Understanding and strict adherence to principles of rigid fixation is critical in preventing complications. Early surgical intervention for hardware exposure as well as utilization of locoregional flaps may prevent the need for more ex tensive revision surgery.
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Thieme Medical Publishers, Inc. 333 Seventh Avenue, 18th Floor, New York, NY 10001, USA

Article in Thieme eJournals:
Table of contents  |  Abstract  |  Full text

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Stereotactic Partial Breast Irradiation: What Does the Future Hold?

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imageBreast irradiation has evolved significantly over the last several decades. Accelerated partial breast and stereotactic breast irradiation have evolved as strategies to reduce irradiated volumes, preserve appropriate oncologic control, and improve cosmetic outcome. The sequencing and/or combination of stereotactic partial breast irradiation with novel systemic agents is of great interest to the oncologic community. Here we explore the landscape of modern trials and opine on the future of partial breast irradiation.
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Weekly Symptom Profiles of Non‐hospitalized Individuals Infected with SARS‐CoV‐2 During the Omicron Outbreak in Hong Kong: A Retrospective Observational Study from a Telemedicine Centre

alexandrossfakianakis shared this article with you from Inoreader

Abstract

Background

Omicron BA.2.2 is the dominant variant in Hong Kong outbreak since December-31 2021. There is no study reporting the weekly symptom profile after infection.

Methods

In this retrospective study, participants who tested positive for SARS-CoV-2 after December-31 2021 and registered in the telemedicine system between March 14-May 6 2022 were analysed.

Findings

Among registered 12950 self-quarantined COVID-19 positive patients, 11776 symptomatic patients were included for weekly symptom profile analysis. 4718 (40.1%) patients reported symptoms in the first week after positive test, 2501 (21.2%) in the second week, 1498 (12.7%) in the third week, 1048 (8.9%) in the fourth week, and 2011 (17.1%) in over four weeks. Cough was the most common symptom in all participants. Patients in the first week had higher odds of reporting fever (0.206, 95% CI 0.161-0.263, p<0.001) and sore throat (0.228, 95% CI 0.208-0.252, p<0.001). Patients in over 4 weeks had a higher odds of reporting fatigue (1.263, 95% CI 1.139-1.402, p<0.001). Further, having at least two vaccine doses linked to lower odds of having fever (0.675, 95% CI 0.562-0.811, p<0.001), but not associated with the presence of cough and fatigue. Diabetic patients had higher odds of reporting diarrhea (1.637, 95% CI 1.351-1.982, p<0.001).

Conclusion

Symptoms from omicron infection may last for more than four weeks and symptom profiles vary from week to week. Vaccination and comorbidity affect the symptom profiles.

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