Cemented Single Crown Retention on Dental Implants: An In Vitro Study

2017 ◽  
Vol 30 (2) ◽  
pp. 133-135 ◽  
Author(s):  
Stefan Rues ◽  
Melissa Fugina ◽  
Peter Rammelsberg ◽  
Stefanie Kappel
Keyword(s):  
Dental Implants ◽  
In Vitro Study ◽  
Vitro Study ◽  
Single Crown

The Relationship Between Time of Re-Tightening and Preload Loss of Abutment Screws for Two Different Implant Designs: An In-Vitro Study

2019 ◽  
pp. 0000-0000
Author(s):  
Giuseppe Varvara ◽  
Bruna Sinjari ◽  
Sergio Caputi ◽  
Antonio Scarano ◽  
Maurizio Piattelli
Keyword(s):  
Dental Implants ◽  
Randomized Clinical Trials ◽  
In Vitro Study ◽  
Acrylic Resin ◽  
Vitro Study ◽  
Standardized Protocol ◽  
Single Crown ◽  
Mechanical Factors ◽  
Abutment Screw

The loosening of an abutment screw is one of the most frequent complications in implant-prosthetic rehabilitation, especially for single crown cemented prostheses. This complication is due to several mechanical factors, including: type of connection, abutment-screw geometry, settling effects, and cyclical load. The purpose of the present in-vitro study was to compare and associate different times of re-tightening with reductions in preload losses. We evaluated 40 internal hexagon dental implants and 40 external hexagon dental implants, with their related abutment screws. The implants were embedded in acrylic resin in cylindrical polyvinyl chloride tubes (diameter, 26 mm; height, 20 mm). The abutments were fixed to the implants with screws to an initial torque of 35 Ncm using a digital torque meter with decimal precision. The two different types of connection were randomly divided in four subgroups of 10 samples each. One subgroup was used as control. The test groups underwent re-tightening to the same initial torque at increasing times from initial torque application for tightening of the abutment screws, to their re-tightening at 2 min, 5 min, and 10 min. The re-tightening time of 2 min shows significantly reduced preload loss. Randomized clinical trials are strongly required to provide clinicians with a beneficial standardized protocol of re-tightening that can be applied in routine clinical practice.

Biofilm formation on dental implants with different surface micro‐topography: An in vitro study

2019 ◽  
Vol 30 (8) ◽  
pp. 725-734 ◽  
Author(s):  
Patricia Bermejo ◽  
María Carmen Sánchez ◽  
Arancha Llama‐Palacios ◽  
Elena Figuero ◽  
David Herrera ◽  
...  
Keyword(s):  
Dental Implants ◽  
Biofilm Formation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Micro Topography

Human fetal osteoblast behavior on zirconia dental implants and zirconia disks with microstructured surfaces. An experimental in vitro study

2015 ◽  
Vol 27 (11) ◽  
pp. e144-e153 ◽  
Author(s):  
Rafael Arcesio Delgado-Ruíz ◽  
Gerardo Gomez Moreno ◽  
Antonio Aguilar-Salvatierra ◽  
Aleksa Markovic ◽  
Jose Eduardo Mate-Sánchez ◽  
...  
Keyword(s):  
Dental Implants ◽  
In Vitro Study ◽  
Vitro Study ◽  
Microstructured Surfaces

An advanced navigational surgery system for dental implants completed in a single visit: An in vitro study

2015 ◽  
Vol 43 (1) ◽  
pp. 117-125 ◽  
Author(s):  
Sung-Goo Kim ◽  
Woo-Jin Lee ◽  
Sam-Sun Lee ◽  
Min-Suk Heo ◽  
Kyung-Hoe Huh ◽  
...  
Keyword(s):  
Dental Implants ◽  
In Vitro Study ◽  
Vitro Study ◽  
Single Visit

scholarly journals Accuracy of digital bitewing radiographs with and without applying horizontal tube shift in the diagnosis of residual excess cement around dental implants: An in vitro study.

2021 ◽  
Vol 10 (1) ◽  
pp. 1-8
Author(s):  
Zahra Dalili Kajan ◽  
◽  
Hamid Neshandar Asli ◽  
Negar Khosravifard ◽  
Maryam Bidvand ◽  
...  
Keyword(s):  
Dental Implants ◽  
Sensitivity And Specificity ◽  
In Vitro Study ◽  
Horizontal Tube ◽  
Diagnostic Value ◽  
Vitro Study ◽  
Radiographic Method ◽  
Radiographic Technique

Purpose: This study was designed to evaluate the diagnostic value of digital Bitewing (BW) radiographs with and without horizontal tube shift in detecting Residual excess cement (REC) on the proximal and non-proximal surfaces of implant restorations. Material and Methods: Eight mandibular models were fabricated with two implants placed on each side in the premolar and first molar positions. Excess cement was applied to either proximal or non-proximal surfaces of the restorations intentionally during the process of crown cementation. BW radiographs with and without applying horizontal tube shift were acquired. Three maxillofacial radiologists were asked to determine the presence and location of REC in the radiographs. Sensitivity and specificity of the radiographic technique were assessed according to the restoration surface that contained REC. Results: Sensitivity of BW radiographs was 100% for the detection of REC on the proximal surfaces and 41-18, 80% on the non-proximal surfaces. Specificity of the technique was 85.71%-100% for the proximal surfaces and 75-94. 12% for the non-proximal areas. Specificity of the radiographic method was generally greater than its sensitivity for the non-proximal surfaces while in the proximal areas, the two variables had quite similar values. Conclusion: Digital BW radiography is generally more useful for detection of REC on the proximal surfaces. Higher specificity of this technique for the bucco-lingual surfaces suggests more reliability of the negative diagnoses in the non-proximal areas.

Sign in / Sign up

Export Citation Format

Share Document