scholarly journals Mobility of B.C.T. Dental implants inserted by one and two-phase surgical method: An experimental study

2006 ◽  
Vol 63 (10) ◽  
pp. 867-872
Author(s):  
Novak Stamatovic ◽  
Smiljana Matic ◽  
Zoran Lazic ◽  
Zoran Tatic
Keyword(s):  
Dental Implants ◽  
Titanium Implants ◽  
Phase Method ◽  
Average Weight ◽  
Crucial Importance ◽  
Two Phase ◽  
Term Survival ◽  
Surgical Method ◽  
The Difference

Background/Aim. Achievement of the osseointegration of dental implants is of crucial importance for their long-term survival. One of the factors that influence the osseointegration is a surgical method of implantation. The outcome of osseointegration can be evaluated on the basis of implant mobility in bone. The aim of this study was to investigate and compare the mobility of B.C.T. dental titanium implants inserted to experimental animals using an one and two-phase method. Methods. The investigation was performed using a split-mouth design on nine dogs, male german shephards, average age of 3.5 years and average weight of 32 kg. Extractions of the third and fourth lower premolars were performed under intravenous (i.v.) anaesthesia with 5% ketamine chloride. Eight weeks after the extractions, the implants, diameter of 4.5 mm each, with four threads 13.7 mm long, were inserted. Eighteen implants were inserted one side of the jaw using a one-phase method, and another 18 implants were inserted contralaterally using a two-phase method. Three months after the implantation, the implant mobility was evaluated. Three measurements were performed with a Periotest device, and average values were calculated. The implant mobility was classified according to the Periotest scale in four groups of Periotest values (PTV) and compared. A total of 36 implants were inserted in 9 experimental dogs. The PTV ranged from -7.666 to + 50. Results. According to the Periotest scale, 14 one-phase implants (78%) were classified into the 0 group of PTV, and 4 one-phase implants (22%) in the 3rd group. Thirteen two phase implants (72%) were classified in the 0 group, and 5 implants in the 3rd group of Periotest scale. The difference in the average values of PTV between the two methods was 0.879 which was not statistically significant. Conclusion. This study showed that the method of implant insertion had no influence on the implant mobility, i.e. satisfactory osseointegration could be achieved by both methods. Further clinical parameters, as well as pathohistological and histomorphometric ones, have to be evaluated in order to assess better outcome of a particular method.

scholarly journals A Literature Review Study on Atomic Ions Dissolution of Titanium and Its Alloys in Implant Dentistry

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 368 ◽  
Author(s):  
Sammy Noumbissi ◽  
Antonio Scarano ◽  
Saurabh Gupta
Keyword(s):  
Dental Implants ◽  
Metal Ion ◽  
Titanium Implants ◽  
In Vitro Studies ◽  
Ion Release ◽  
Term Survival ◽  
Metal Ion Release

This review of literature paper was done in order to conduct a review of the literature and an assessment of the effects of titanium implant corrosion on peri-implant health and success in the oral environment. This paper evaluates and critically reviews the findings of the multiple in-depth in vivo and in vitro studies that are related to corrosion aspects of the titanium and its alloys. A literature survey was conducted by electronic search in Medline and studies that were published between 1940 and August 2018 were selected. The search terms used were types of corrosion, corrosion of titanium implants, titanium corrosion, metal ion release from the titanium implants, fretting and pitting corrosion, implant corrosion, peri implantitis, and corrosion. Both in vivo and in vitro studies were also included in the review. The search and selection resulted in 64 articles. These articles were divided on the basis of their context to different kinds of corrosion related to titanium dental implants. It is evident that metal ions are released from titanium and titanium alloy dental implants as a result of corrosion. Corrosion of implants is multifactorial, including electrical, chemical, and mechanical factors, which have an effect on the peri-implant tissues and microbiota. The literature surveyed showed that corrosion related to titanium and its alloys has an effect on the health of peri-implant soft and hard tissue and the long term survival of metal dental implants. It can be concluded that presence of the long-term corrosion reaction along with continuous corrosion leads to the release of ions into the peri-implant tissue but also to a disintegration of the implant that contribute to material fatigue and even fracture of the abutments and implant body or both. This combined impact of the corrosion, bacterial activity, chemical reactions, and functional stresses are to be looked at as important factors of implant failure. The findings can be used to explore the possible strategies of research to investigate the biological impact of implant materials.

scholarly journals Comparison of the Primary Stability of Porous Tantalum and Titanium Acetabular Revision Constructs

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1783
Author(s):  
Nicholas A. Beckmann ◽  
Rudi G. Bitsch ◽  
Mareike Schonhoff ◽  
Klaus-Arno Siebenrock ◽  
Martin Schwarze ◽  
...  
Keyword(s):  
Relative Motion ◽  
Clinical Implication ◽  
Primary Stability ◽  
Titanium Implants ◽  
Acetabular Revision ◽  
Acetabular Defect ◽  
Implant Survival ◽  
Porous Tantalum ◽  
The Difference

Adequate primary stability of the acetabular revision construct is necessary for long-term implant survival. The difference in primary stability between tantalum and titanium components is unclear. Six composite hemipelvises with an acetabular defect were implanted with a tantalum augment and cup, using cement fixation between cup and augment. Relative motion was measured at cup/bone, cup/augment and bone/augment interfaces at three load levels; the results were compared to the relative motion measured at the same interfaces of a titanium cup/augment construct of identical dimensions, also implanted into composite bone. The implants showed little relative motion at all load levels between the augment and cup. At the bone/augment and bone/cup interfaces the titanium implants showed less relative motion than tantalum at 30% load (p < 0.001), but more relative motion at 50% (p = n.s.) and 100% (p < 0001) load. The load did not have a significant effect at the augment/cup interface (p = 0.086); it did have a significant effect on relative motion of both implant materials at bone/cup and bone/augment interfaces (p < 0.001). All interfaces of both constructs displayed relative motion that should permit osseointegration. Tantalum, however, may provide a greater degree of primary stability at higher loads than titanium. The clinical implication is yet to be seen

Long-term Survival of Straumann Dental Implants with TPS Surfaces: A Retrospective Study with a Follow-up of 12 to 23 Years

2015 ◽  
Vol 18 (3) ◽  
pp. 480-488 ◽  
Author(s):  
Stephan T. Becker ◽  
Benedicta E. Beck-Broichsitter ◽  
Christian M. Rossmann ◽  
Eleonore Behrens ◽  
Arne Jochens ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Dental Implants ◽  
Term Survival ◽  
Long Term Survival

scholarly journals Surface enlargement of a new arterialised venous flap by the surgical delay method

2014 ◽  
Vol 71 (6) ◽  
pp. 547-553 ◽  
Author(s):  
Mikica Lalkovic ◽  
Jefta Kozarski ◽  
Ljubomir Panajotovic ◽  
Milan Visnjic ◽  
Dragan Djurdjevic ◽  
...  
Keyword(s):  
Experimental Model ◽  
Experimental Models ◽  
Control Group ◽  
Average Weight ◽  
Surgical Delay ◽  
Surgical Method ◽  
Rabbit Ear ◽  
Group A ◽  
The Difference ◽  
Venous Flap

Background/Aim. The delay method is a surgical, pharmacological and combined method that includes two or more time separated phases, which gives bigger flap surface. In our research we explored the possibility of flap surface enlargement in a new arterialised venous flap (AVF) on an experimental rabbit ear model by the delay surgical method. The aim of this research was to establish vitality surface of our AVF and to maintain the difference in flap vital surface between AVF flaps, with or without performing the delay surgery method. Methods. We used both ears of ?Big Chinchilla? rabbits in 10 experimental male animals, divided into two groups, average weight 3-3.5 kg, and average age 8-10 months. In the first (experimental) group, a venous flap was arterialised by our method. In the second (control) group, the venous flap was arterialised 14 days after the delay surgical method. AVF surface was measured on the 1 and 14 days by the method of trapezoid rule. Results. Vital surface on our AVF experimental model was bigger than 87% of elevated flap surface after the delay surgical method. Vital surface on AVF without delay on our experimental model was bigger than 30% of elevated flap surface (p < 0.001). Conclusion. Analysis of previous experimental models on the rabbit ear, non-delayed and delayed (to enlarge flap surface) led us to conclusion that previously created experimental models of non-delayed AVF are hemodynamically negative. Our experimental non-delay AVF model is hemodynamically more positive than previously created models of non-delay AVF and provides better conditions for AVF survival and enlargement of vital flap surface of elevated flap. On the other hand, surgical delay method significantly enlarges vital surface of AFF.

scholarly journals Risk Assessment in Long-term Survival Rates of Dental Implants: A Prospective Clinical Study

2018 ◽  
Vol 19 (5) ◽  
pp. 587-590 ◽  
Author(s):  
Rizwan Mokashi ◽  
Punkit S Sudan ◽  
Anand M Dharamsi ◽  
Rinkee Mohanty ◽  
Archana L Misurya ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Clinical Study ◽  
Dental Implants ◽  
Survival Rates ◽  
Prospective Clinical Study ◽  
Term Survival ◽  
Long Term Survival

scholarly journals Virtual interpolation of discrete multi-objective programming solutions with probabilistic operation

2011 ◽  
Vol 22 (4) ◽  
pp. 379-389
Author(s):  
Ricardo C. Silva ◽  
Edilson F. Arruda ◽  
Fabrício O. Ourique
Keyword(s):  
Probability Distributions ◽  
Phase Method ◽  
Second Phase ◽  
Pareto Optimal ◽  
Two Phase ◽  
Term Operation ◽  
Multi Objective ◽  
Multi Objective Programming ◽  
Objective Programming

This work presents a novel framework to address the long term operation of a class of multi-objective programming problems. The proposed approach considers a stochastic operation and evaluates the long term average operating costs/profits. To illustrate the approach, a two-phase method is proposed which solves a prescribed number of K mono-objective problems to identify a set of K points in the Pareto-optimal region. In the second phase, one searches for a set of non-dominated probability distributions that define the probability that the system operates at each point selected in the first phase, at any given operation period. Each probability distribution generates a vector of average long-term objectives and one solves for the Pareto-optimal set with respect to the average objectives. The proposed approach can generate virtual operating points with average objectives that need not have a feasible solution with an equal vector of objectives. A few numerical examples are presented to illustrate the proposed method.

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