Abstract:
BACKGROUND:Alumina-toughened zirconia (ATZ) is a possible alternative material to titanium for oral implants. No data are available on the fracture strength of ATZ oral implants. PURPOSE:The purpose of this study was to examine one-piece implants made of ATZ ceramic under artificial loading conditions and to compare the fracture strength of these implants with implants fabricated from tetragonal zirconium dioxide poylcrystal (TZP)-A. MATERIALS AND METHODS:A total of 72 implants, 48 ATZ implants (groups A and B) and 24 TZP-A implants (group C), were investigated. A chamfer preparation at the implant heads was performed on all implants of groups B and C. Eight implants of each group underwent 1.2 or five million thermomechanical loading cycles in the chewing simulator (load value: 98 N). Further eight implants of each group were not cyclic loaded. Finally, the fracture strength of all implants was determined using a universal testing machine. RESULTS:No implant fractured during loading in the chewing simulator. All implants were placed in the universal testing machine to evaluate fracture strength. The mean fracture strength values±standard deviations for the implants without artificial loading were 1734±165 N (ATZ, no preparation), 1220±85 N (ATZ, with preparation), and 578±49 N (TZP-A, with preparation); 1489±190 N (ATZ, no preparation), 1064±121 N (ATZ, with preparation), and 607±57 N (TZP-A, with preparation) with 1.2 million loading cycles; and 1358±187 N (ATZ, no preparation), 1098±97 N (ATZ, with preparation), and 516±45 N (TZP-A, with preparation) with five million cycles. The ATZ implants showed significantly higher mean fracture strengths compared with the TZP-A implants. Modification of the implant head using diamond burs and increased loading time also led to a significant decrease in fracture strength. CONCLUSIONS:The ATZ implants showed an increased mechanical stability compared with the TZP-A. Modification of the implant head resulted in a decrease in fracture strength. However, within the limits of this in vitro investigation it can be concluded that ATZ implants will withstand functional loading over an estimated period of 20 years.
journal_name
Clin Oral Implants Resjournal_title
Clinical oral implants researchauthors
Kohal RJ,Wolkewitz M,Mueller Cdoi
10.1111/j.1600-0501.2010.01954.xsubject
Has Abstractpub_date
2010-12-01 00:00:00pages
1345-52issue
12eissn
0905-7161issn
1600-0501pii
CLR1954journal_volume
21pub_type
杂志文章abstract:OBJECTIVES:The aim of this manuscript is to provide a bone map that can be used as a general guide to determine the areas where miniscrews can be safely anchored. MATERIALS AND METHODS:Twenty-one computed tomographies (CTs) of maxilla and mandible were taken by the imaging centre ORTOSCAN and two measures were taken: ...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2007.01507.x
更新日期:2008-06-01 00:00:00
abstract:OBJECTIVES:To assess the relationship between smooth and roughened implant surfaces of straight and narrow configurations with respect to microdamage of the bone surface during placement of dental implants. MATERIALS AND METHODS:Straight and tapered, rough and smooth surface Nobel Biocare implants were placed into she...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2010.02024.x
更新日期:2011-06-01 00:00:00
abstract:AIM:This study sought to investigate dimensional changes to the alveolar bone following extraction and application of novel devices used for obturation of socket orifice (socket cap) and space maintenance in sockets with facial dehiscence (socket cage). MATERIAL AND METHODS:Six Macaca fascicularis had six teeth each r...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/clr.12521
更新日期:2016-01-01 00:00:00
abstract::The principle of guided tissue regeneration was applied in an attempt to generate bone to cover a subperiosteal implant. Titanium frame works, casted on individual impressions of the anterior surface of the tibia of 4 Copenhagen White rabbits, were stabilized to the tibia by microscrews, and half of them were covered ...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.1995.060303.x
更新日期:1995-09-01 00:00:00
abstract::The purpose of this study was to examine the healing potential and re-osseointegration in peri-implant infection defects adjacent to various implant surfaces. In 7 female Beagle dogs, a total of 41 titanium oral implants (ITI, Straumann, Waldenburg; Switzerland) with a sink depth of 6 mm (diameter 2.8 mm) were placed ...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.1999.100205.x
更新日期:1999-04-01 00:00:00
abstract::In the present multi-center study, non-submerged ITI implants were prospectively followed to evaluate their long-term prognosis in fully and partially edentulous patients. In a total of 1003 patients, 2359 implants were consecutively inserted. Following a healing period of 3-6 months, the successfully integrated impla...
journal_title:Clinical oral implants research
pub_type: 杂志文章,多中心研究
doi:10.1034/j.1600-0501.1997.080302.x
更新日期:1997-06-01 00:00:00
abstract:INTRODUCTION:Available literature suggests there is a transient drop in implant stability from approximately week 0 to week 3-4 as a result of peri-implant bone remodeling as it transitions from a primary, mechanical stability to a secondary, biological stability. Research investigating the influence of macro-thread de...
journal_title:Clinical oral implants research
pub_type: 杂志文章,随机对照试验
doi:10.1111/clr.12945
更新日期:2017-10-01 00:00:00
abstract:OBJECTIVES:The aim of this clinical study was to evaluate long-term outcomes of implant therapy in a cohort of immunosuppressed renal transplant patients compared with a matched control group. MATERIAL AND METHODS:Pharmacologically immunosuppressed renal transplant patients received dental implant treatment between 20...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/clr.13437
更新日期:2019-06-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to compare changes at the marginal bone level adjacent to implants placed with flapless surgery and flap surgery during a stress-free healing period. MATERIAL AND METHODS:Seven hundred and eighty-five implants were placed in 417 patients with a flapless approach and 459 implants...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2010.01961.x
更新日期:2010-12-01 00:00:00
abstract::Treatment with denture for edentulous people is highly important for maintaining quality of life. However, its effect on the brain is unknown. In this experimental study, we hypothesized that dental prosthesis can recover not only the physical condition of mastication system but also the regional brain activity. We ev...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2005.01171.x
更新日期:2005-12-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the effect of the topical application of melatonin compared with collagenized porcine bone grafts to accelerate bone formation 2 months after their insertion in tibiae rabbits. MATERIAL AND METHODS:Twenty New Zealand rabbits weighing 3,900-4,500 g were used. Twenty colla...
journal_title:Clinical oral implants research
pub_type: 杂志文章,收录出版
doi:10.1111/clr.12364
更新日期:2015-04-01 00:00:00
abstract:OBJECTIVES:To investigate the effect of treated periodontitis on implant outcomes in partially edentulous individuals compared with periodontally healthy patients. MATERIAL AND METHODS:Longitudinal studies reporting on implant survival, success, incidence of peri-implantitis, bone loss and periodontal status, and on p...
journal_title:Clinical oral implants research
pub_type: 杂志文章,评审
doi:10.1111/clr.12684
更新日期:2016-07-01 00:00:00
abstract::For certain surgical procedures (e.g. placement of implants), an accurate localisation of the mandibular canal is of utmost importance to avoid injuries to the neurovascular bundle. The aim of the present study was to evaluate, on human fresh cadavers (n = 6), the accuracy of conventional spiral tomography for the loc...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.2001.012003230.x
更新日期:2001-06-01 00:00:00
abstract::This paper reports on a 7-year life table analysis on ITI titanium plasma-sprayed (TPS) and sandblasted and etched (SLA) implants placed in a private practice and loaded for at least 1 year. In 236 patients, 528 (264 TPS and 264 SLA) implants were placed, 351 (66.5%) implants rehabilitated the posterior region and 71....
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2004.00978.x
更新日期:2004-04-01 00:00:00
abstract::It has been postulated that the wound healing in a closed submerged location is one of the prerequisites for osseointegration of dental implants. The purpose of the present study was to evaluate the tissue integration of intentionally non-submerged titanium implants inserted by a one-stage surgical procedure. 100 ITI ...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.1990.010105.x
更新日期:1990-12-01 00:00:00
abstract:OBJECTIVES:This in vitro study describes and characterizes a developed novel method to produce coatings on Ti. Hydrophobic coatings on substrates are needed in prosthetic dentistry to promote durable adhesion between luting resin cements and coated Ti surfaces. In implant dentistry the hydrophobic coatings on a Ti impl...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2012.02504.x
更新日期:2013-06-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to explore effects of implant macrodesign and diameter on initial intraosseous stability and interface mechanical properties of immediately placed implants. MATERIAL AND METHOD:Mandibular premolars of four fresh-frozen human cadavers were extracted. Ø 4.1/4.8 mm ITI TE, Ø 4.1 ...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2004.01099.x
更新日期:2005-04-01 00:00:00
abstract:OBJECTIVES:The aim of the present systematic review was to analyze the survival and complication rates of zirconia-based and metal-ceramic implant-supported single crowns (SCs). MATERIALS AND METHODS:An electronic MEDLINE search complemented by manual searching was conducted to identify randomized controlled clinical ...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/clr.13306
更新日期:2018-10-01 00:00:00
abstract::The aim of the present study was to compare three different systems for preparing platelet concentrates: two commercially available bed-side techniques (Curasan system and PCCS) and a procedure used routinely in transfusion medicine. Platelet concentrates were prepared from venous blood of 12 healthy male volunteers u...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.2002.130512.x
更新日期:2002-10-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to enhance the blood responses to titanium (Ti) surfaces used for dental implant application through the formation of a TiO2 nano-mesh surface layer produced by a fast electrochemical anodization treatment. MATERIAL AND METHODS:Electrochemical anodization treatments with different...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2010.02152.x
更新日期:2012-03-01 00:00:00
abstract:OBJECTIVE:The purpose of this prospective study was to evaluate one-stage dental implants clinically and radiographically after 10 years in function. MATERIAL AND METHODS:Twenty-five patients with a total of 68 implants [46 hollow screws (HS) and 22 hollow cylinders (HC)] who previously participated in 5-year prospect...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2007.01479.x
更新日期:2008-03-01 00:00:00
abstract:OBJECTIVES:To evaluate the effect of enamel matrix derivative in liquid form (EMD-liquid) as adjunct to grafting with natural bovine bone (NBB), on new bone formation and osseointegration in buccal dehiscence defects at dental implants. MATERIAL AND METHODS:In six beagles, 3 months after extraction of the mandibular p...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/clr.13512
更新日期:2019-10-01 00:00:00
abstract:BACKGROUND:Cement-retained fixed implant-supported restorations involve the risk of excess cement, which can associate peri-implantitis. In connection with routine therapy using a methacrylate cement (Premier Implant Cement, Premier(®) Dental Products Company, Plymouth Meeting, PA, USA) to retain fixed implant-supporte...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/clr.12173
更新日期:2014-07-01 00:00:00
abstract:OBJECTIVES:Zirconia powder in nanometers can be fabricated into inter-joined abutment of dental implant system with the injection shaping technique. This study was to detect the resistance of inter-joined zirconia abutment with different angle loading for clinical applications. MATERIALS AND METHODS:The inter-joined a...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2012.02539.x
更新日期:2013-11-01 00:00:00
abstract::In the literature intraoral periapical radiographs are commonly used for densitometric measurements of the mandible with implants. These films give detailed information of the implant and the surrounding bone. However, in extreme mandibular atrophy it can be difficult to obtain intraoral radiographs of adequate diagno...
journal_title:Clinical oral implants research
pub_type: 临床试验,杂志文章
doi:10.1034/j.1600-0501.2000.011005476.x
更新日期:2000-10-01 00:00:00
abstract:OBJECTIVES:The outcome of oral rehabilitation is usually monitored with clinical tests rather than by patient's perception of change. The aim of this study was to describe the objective measure and subjective perception of oral rehabilitation in patients with tooth agenesis. MATERIAL AND METHODS:The study included 129...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2008.01698.x
更新日期:2009-07-01 00:00:00
abstract::The present study describes the use of a degradable and a non-degradable material for guided bone regeneration. Forty rabbits were divided into 5 groups. Bicortical defects 15 mm in diameter were prepared in rabbit calvaria. A titanium microplate was placed over the defect to prevent collapse of the membrane. The calv...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.1998.090504.x
更新日期:1998-10-01 00:00:00
abstract::The purpose of the present in vitro investigation was to measure temperature changes at the implant surface when using pulsed CO2 laser in a simulated implant surface decontamination protocol. Six threaded titanium implants were placed in a fresh resected pig mandible. A 4 x 4 mm defect was created buccally to each im...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1034/j.1600-0501.1999.100107.x
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVE:Long-term success of dental implants depends on healthy peri-implant soft tissues and adequate bone levels. This prospective study aims to assess bone level changes around implants with internal conical connection and platform-switching abutments in the posterior mandible. MATERIAL AND METHODS:Adult patients...
journal_title:Clinical oral implants research
pub_type: 杂志文章,多中心研究
doi:10.1111/clr.12644
更新日期:2016-06-01 00:00:00
abstract:OBJECTIVES:To evaluate the effect of vertical and periosteal-releasing incisions (PRI) on the extension of the buccal flap in a trapezoidal flap design. MATERIAL AND METHODS:Thirty patients scheduled for implant surgery accompanied by bone augmentation were recruited. The amount of flap extension pulled with a minimal...
journal_title:Clinical oral implants research
pub_type: 杂志文章
doi:10.1111/j.1600-0501.2011.02244.x
更新日期:2012-08-01 00:00:00