scholarly journals Surrounding Tissue Response to Surface-Treated Zirconia Implants

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 30 ◽  
Author(s):  
Yohei Iinuma ◽  
Masatsugu Hirota ◽  
Tohru Hayakawa ◽  
Chikahiro Ohkubo
Keyword(s):  
Soft Tissue ◽  
Tetragonal Zirconia ◽  
Collagen Fibers ◽  
Tissue Response ◽  
Surrounding Tissue ◽  
Contact Ratio ◽  
Bone Response ◽  
Soft Tissue Attachment ◽  
Tissue Attachment ◽  
Zirconia Implants

Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP), which are partially stabilized zirconia, have been used for fabricating dental implants. This study investigated the soft tissue attachment, the collagen fiber orientation to zirconia at different surface conditions, and the bone response using implantation experiments in animals. The zirconia implant surfaces were treated with ultraviolet irradiation (UV), a combination of large-grit sandblasting and hydrofluoric acid etching (blastedHF), and a combination of blastedHF and UV (blastedHF+UV). The surface treated with blastedHF and blastedHF+UV appeared rough and hydrophilic. The surface treated with blastedHF+UV appeared to be superhydrophilic. Subsequently, tapered cylindrical zirconia implants were placed in the alveolar sockets of the maxillary molars of rats. The bone-to-implant contact ratio of blastedHF and blastedHF+UV implants was significantly higher than that of the non-treated controls and UV-treated implants. The four different surface-treated zirconia implants demonstrated tight soft tissue attachments. Perpendicularly oriented collagen fibers towards zirconia implants were more prominent in blastedHF and blastedHF+UV implants compared to the controls and UV-treated implants. The area of the soft tissue attachment was the greatest with the perpendicularly oriented collagen fibers of blastedHF+UV-treated implants. In conclusion, blastedHF+UV treatment could be beneficial for ensuring greater soft-tissue attachment for zirconia implants.

Comparing the Responses of Osseous Versus Soft-Tissue Metastases of Renal Cell Carcinoma to Receptor Tyrosine Kinase Inhibitors and Immunotherapy

Kidney Cancer ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 151-158
Author(s):  
Katherine Yuxi Tai ◽  
Jad M. El Abiad ◽  
Carol D. Morris ◽  
Mark Christopher Markowski ◽  
Adam S. Levin
Keyword(s):  
Renal Cell Carcinoma ◽  
Soft Tissue ◽  
Cell Carcinoma ◽  
Receptor Tyrosine Kinase ◽  
Renal Cell ◽  
Kinase Inhibitors ◽  
Tissue Response ◽  
Bone Response ◽  
Soft Tissue Response ◽  
Receptor Tyrosine Kinase Inhibitors

BACKGROUND: Checkpoint inhibitors and receptor tyrosine kinase inhibitors (RTKIs) have changed the standard of care for metastatic renal cell carcinoma (mRCC). Anecdotal evidence suggests these therapies may be less effective for treating bone than soft-tissue metastases. PURPOSE: We performed a retrospective review evaluating the relative clinical responses in soft-tissue and bone metastases in patients undergoing therapy using RTKIs and anti-programmed death-1 (PD-1) agents for mRCC. METHODS: Of the 2,212 patients in our institutional cancer registry with renal cell carcinoma (1997–2017), 68 (82 disease courses) were identified with measurable bone and soft-tissue metastases treated with RTKIs and/or PD-1s. Extent of metastasis was quantified at the time of therapy initiation (baseline) and at 3 months, 6 months, and 1 year. Changes in disease status were categorized as complete response, partial response, stable, mixed, or progression of disease according to RECIST v1.1 and MD Anderson criteria. These categories were further organized into “response to treatment” or “evidence of progression” to generate a generalized linear effects model with soft-tissue response as the independent variable and bone response as the dependent variable. Alpha = 0.05. RESULTS: Soft-tissue response correlated with bone response at 3 months (76 disease courses, p = 0.005) and 6 months (48 disease courses, p = 0.017). Of the patients with controlled soft-tissue disease, only 14 (19%) and 15 (32%) had progression in bone at 3 and 6 months, respectively. CONCLUSION: Contrary to anecdotal reports, osseous metastases do not appear to respond worse than soft-tissue metastases to treatment with these agents.

Soft Tissue Attachment of a Filamentous Carbon-Absorbable Polymer Tendon and Ligament Replacement

1981 ◽  
Vol &NA; (160) ◽  
pp. 268???278 ◽  
Author(s):  
JAMES ARAGONA ◽  
JOHN R. PARSONS ◽  
HAROLD ALEXANDER ◽  
ANDREW B. WEISS
Keyword(s):  
Soft Tissue ◽  
Filamentous Carbon ◽  
Ligament Replacement ◽  
Soft Tissue Attachment ◽  
Tissue Attachment

Soft tissue attachment on sol–gel-treated titanium implants in vivo

2007 ◽  
Vol 19 (3) ◽  
pp. 1283-1290 ◽  
Author(s):  
H. Paldan ◽  
S. Areva ◽  
T. Tirri ◽  
T. Peltola ◽  
T. C. Lindholm ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Sol Gel ◽  
Titanium Implants ◽  
Soft Tissue Attachment ◽  
Tissue Attachment

scholarly journals In Vivo Investigation of Soft Tissue Response of Novel Silver/Poly(Vinyl Alcohol)/ Graphene and Silver/Poly(Vinyl Alcohol)/Chitosan/Graphene Hydrogels Aimed for Medical Applications – The First Experience

2018 ◽  
Vol 68 (3) ◽  
pp. 321-339 ◽  
Author(s):  
Tijana Lužajić Božinovski ◽  
Danica Marković ◽  
Vera Todorović ◽  
Bogomir Prokić Bolka ◽  
Ivan Milošević ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Vinyl Alcohol ◽  
Subcutaneous Tissue ◽  
Tissue Response ◽  
Surrounding Tissue ◽  
Poly Vinyl Alcohol ◽  
Medical Applications ◽  
Capsule Thickness ◽  
Soft Tissue Response

Abstract In this paper, we have shown for the fi rst time the soft tissue response of novel silver/ poly(vinyl alcohol)/graphene (Ag/PVA/Gr) and silver/poly(vinyl alcohol)/chitosan/ graphene (Ag/PVA/CHI/Gr) nanocomposite hydrogels aimed for medical applications. These novel hydrogels were produced by in situ electrochemical synthesis of silver nanoparticles in the polymer matrices as described in our previously published works. Both Ag/PVA/Gr and Ag/PVA/CHI/Gr, as well as controls Ag/PVA, Ag/PVA/CHI and commercial Suprasorb©hydrogel discs, were implanted in the subcutaneous tissue of rats. Implants with the surrounding tissue were dissected after post-implantation on days 7, 15, 30 and 60, and then processed for histological examination. The tissue irritation index (TIrI) score, according to ISO 10993-6, 2007, as well as the number of leukocytes in the peri-implant zone and connective tissue capsule thickness were examined. The results show that each TIrI score, the leukocyte number around the implanted materials and capsule thickness gradually decreased during the observation period. At the endpoint of follow-up, the Ag/PVA/CHI/Gr implant was surrounded with a thinner capsule, while both the TIrI score and the number of leukocytes of the peri-implant zone were greater compared to the Ag/PVA/Gr implant. Despite the observed differences, we can conclude that our in vivo experiment suggested that both novel hydrogels were biocompatible and suitable for medical use.

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