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Menampilkan postingan dari November, 2008

Flapless Implant Surgery | OsseoNews Discussions on Dental Implants

Flapless Implant Surgery | OsseoNews Discussions on Dental Implants : "A volumetric scan is ideal but need not be essential provided you know your anatomy and make full use of whatever low tech but economical techniques that are available like what had been described. In many parts of the world, we may not have the scan and use of it may put it out of reach of almost everyone except the very affluent; not to mention a computer fabricated surgical stent. As it is many who need implants cannot afford them. Optimal technology suitable for the context especially the economy of the local people should be used together with a large dose of common sense. Dental implants are the best replacement of lost teeth. As such we should strive to bring its extraordinary life-changing benefits to as many people as possible. Having said that, we should continue to develop more and more accurate means, hightech or otherwise in order to place implants better and faster and more affordably."

Flapless Implant Surgery | OsseoNews Discussions on Dental Implants

Flapless Implant Surgery | OsseoNews Discussions on Dental Implants : "The whole surgical world is moving towards minimal invasive procedures. I believe flapless surgery or transmucosal placement or just making an incision big enough to do the osteotomy is the natural and sensible progression in implant surgery provided no extensive bone grafting is required. Popular rhetoric that it is blind is untrue. It is partially-blind because we have the benefit of models, bone-mapping, Xrays and imaging techniques that give us a pretty good idea of the bone morphology especially when you can eyeball it in vivo albeit covered with a layer of mucosa. Added on to the tactile palpating remote sensing of our supersensitive finger tips, we actually can “see” quite well without flapping and compromising the integrity of surrounding tissues. Flapless unless choiceless is the way to go."

Mini Implants for Long-Term Use? | OsseoNews Discussions on Dental Implants

Mini Implants for Long-Term Use? | OsseoNews Discussions on Dental Implants : "Mini-implants have the advantages of low cost, simple surgical placement and high versatility, have moderate success rates and are easy to insert when anatomic measurements are carefully considered. When failures are noted, retrieving the loosened one and/then inserting another mini-implant has little discomfort and is usually well accepted by patients. A vast majority of clinicians believe that implants not requiring surgical preparation have higher failure rates, while implants with better stability require flap surgeries for insertion and removal. Whereas conventional or modified oral implants have been shown to successfully serve as anchorage for orthodontic appliances, mini-implants failed to reach these high success rates. When the high failure rates of mini-implants are under evaluation two main factors have to be considered. The biomechanical loading of peri-implant bone as well as the time sche

FDA on Mini Implants | OsseoNews Discussions on Dental Implants

FDA on Mini Implants | OsseoNews Discussions on Dental Implants : "A well known one piece small dental dental implant or mini dental implant as some wants to call it is called “self-tapping threaded screws indicated for long-term intra-bony applications. Additionally, they ….. may also be used for inter-radicular transitional applications. These devices will permit immediate splinting stability and long-term fixation of new or existing crown and bridge installations, for full partial edentulism, and employing minimally invasive surgical intervention.” The quotation is taken clean from the FDA K031106 certification. Note that the term used is “self-tapping titanium threaded screws” and not “implants”. It seems that the FDA has to date decided that any threaded titanium screw that is of diameter 3mm and more is called an implant but anything below that is called a titanium threaded screw. However, its uses appear to be close to, if not equivalent to the uses of conventional implants

Mini Implant Systems | OsseoNews Discussions on Dental Implants

Mini Implant Systems | OsseoNews Discussions on Dental Implants : "I find the FDA specifications for an implant if true very strange if not arbitrary. Is 3mm a magic figure or what? Why not 2.5mm or 3.5mm or 2.88mm? If that is really their criteria, then on what rationale have they came out with the magic number of at least 3mm diameter before a dental implant is called a dental implant? Would have thought that adequate osseointegration should be the primary criteria and the rest should be merely complementary. Can somebody from the FDA or privy to their line of logic please enlighten. Thank you."

Mini Implant Systems | OsseoNews Discussions on Dental Implants

Mini Implant Systems | OsseoNews Discussions on Dental Implants : "What is a transitional and what is a provisional and what is an implant and what are their differences? I guess a transitional and a provisional is synonymous and by definition means something temporary until something permanent can be placed. Its probably something like a temporary resin-acrylic bridge until a permanent ceramic bridge is placed.Though nowadays we are seeing more and more composite bridges which last a long time. What do we call them then…..long term use composite bridges? In the mentioned case the transitionals as they grow stronger and more lasting are gradually morphing into permanents! Or should we call them pretenders to the throne? If what Todd says is true, he has at least 2000 fixed crowns and bridges masquerading as permanents for the last 3 to 6 years.Are they now still transitional, longterm, temporary or permanent? Who is the authorised guardian of these terms? Maybe as professionals, w

Mini Implant Systems | OsseoNews Discussions on Dental Implants

Mini Implant Systems | OsseoNews Discussions on Dental Implants : "Mini implants are at the same stage of developement that conventional implants were in the 80’s. I have been doing mini’s for 6 years the reason being I realized that conventional implants can only help about 20% of my patient population. Like conventional implants I started slow and went to Victor Sendex’s course where I saw the true potential for these implants. Like with all implants you need to work back from the prosthetics. I have used 3 systems and have found that Intra-Locks MDL(2.0 and 2.5) and Milo(3.0) provide me with the versality to do single units, partial denture retention and the old stand by full denture retention. They are also most useful in the bail out case. Mini implants are the DUCT TAPE of implant dentistry. They have helped me salvage cases that I could have not done any other way and not have the patient declair bankrupcy. Intra-Lock is the only system that has looked beyond denture retent

Mini Implant Systems | OsseoNews Discussions on Dental Implants

Mini Implant Systems | OsseoNews Discussions on Dental Implants : "Yap. A hollow tube is stronger than a solid tube provided you do not screw something into it intimately so much so that it is not just resisting forces from without but it is also fighting a third column of forces within that is persistently trying to force it to explode, and that is why one of the main drawbacks of 2 piece implants is connecting screw failure! A 1 piece solid implant of 2.5mm diameter is on measure still more advantageous to a 3mm diameter hollow implant with a screw tight inside trying to push it apart. So, maybe the FDA may begin to see the light and pontify down the magic number below 3mm as long as it is not hollow. By the way, whether Pluto is a planet or not depends on whether you are a faithful nolstalgic traditionalist or a sort of a curious gungho advancing experimentalist determined to improve and simplify things.Elegance should not be complicated but simple yet functional."

Mini Implant Systems | OsseoNews Discussions on Dental Implants

Mini Implant Systems | OsseoNews Discussions on Dental Implants : "I was first introduced to dental implantology in 1968 by Dr. Leonard Linkow, while doing a post graduate program working in the department of Prosthodontics at the Hebrew University in Jerusalem Israel. Dr. Linkow demonstrated his concepts of placing different shaped titanium fixtures into the existing residual jaw bone ( an assortment of “blades”, screws,endosteal stabilizers, intramucosal inserts, subperiosteal frames,and even a coined titanium “Star of David” into the jawbone of a rabbi, ; and he called them all dental implants. An artificial device that can be embedded into the jawbone and protrude into the oral cavity such to support a tooth or teeth is, in my humble estimation, a dental implant. I can understand the point of view of the FDA to place a value on the engineering specifications of the strength of a fixture, and decide that anything less than 3mm in diameter is not strong enough to be considered a

Mini Dental Implants: Extensive Debate | OsseoNews Discussions on Dental Implants

Mini Dental Implants: Extensive Debate | OsseoNews Discussions on Dental Implants : "Dear NikkiB, Your mum sounds like one of my patients. 4 mini implants were place on his lower ridge and his loose lower denture was fastened reversibly to the implants. Reversibly means that the denture can be fastened and removed at will for cleaning purposes. Generally, the existing dentures is used so that the patient need not have to get used to a new set of dentures. Once the patient is used to the implants, a new denture can be made if necessary. This particular patient was 82 years old. He was able to eat much better that very night. Hope your mum’s problem is solved soon. Mini implants are very forgiving in the sense that its easier to place than the conventional sized implants and if one fails, it can be removed easily and a new one placed immediately if necessary. warmest regards. Dr. kfchow"

Mini Dental Implants: Extensive Debate | OsseoNews Discussions on Dental Implants

Mini Dental Implants: Extensive Debate | OsseoNews Discussions on Dental Implants : "Branemark generally copied the size and the shape of the tooth in designing his first implant which is logical and made sense at the time. Everyone copied him after that without too much thought about the validity of his assumptions because it works. The question today is how much osseointegration is required to support a tooth say, the premolar in the mouth. The answer to this question will determine how big an implant should be and therefore will determine whether we should continue to make root sized implant fixtures or reduce and minimise its size optimally. How much osseointegration in terms of surface area and quality of bone attachment is required to support a premolar satisfactorily in a functioning dentition needs to be examined closely anew. Lets assume the quality of osseointegration is uniform for most interfaces between the bone and titanium surface. Therefore looking at just the surf

Late Facial Swelling After Implant Placement? | OsseoNews Discussions on Dental Implants

Late Facial Swelling After Implant Placement? | OsseoNews Discussions on Dental Implants : "Insufficient information to clinch a diagnosis. A thorough systemic and localised history and localised examination is necessary. Site of implants, pain, swelling etc. is essential. Anything is possible from sarcoma to just a simple delayed hematoma…. and even a blocked salivary gland. Having said that, it is usually just something common and local like infection or denture trauma or part of the healing process since it is an immediate post extraction placement of implants. Maybe a loose screw on the fixture? We need to approach with a comprehensive overview, considering all the details before zeroing on the diagnosis. Thoroughness is essential Cheers"

Possibility Implant Has Moved? | OsseoNews Discussions on Dental Implants

Possibility Implant Has Moved? | OsseoNews Discussions on Dental Implants : "Dear Anon, What happened is obviously an alien abduction. While doing an extreme MRI on it, it moved. Please double check with your patient. OK OK, I am just joking! It could be that after you placed the healing abutment, the patient accidentally bit on a hard piece of nut or some such thing that is hard and large which we sometimes insist on placing into our stoma in order to masticate and consume it. The hefty crunch was so hefty that it actually caused the bone to give way, but not the periosteum though…… and the whole implant moved 2mm. After that horrid experience, the patient decided to give it a prolonged and careful rest and ate on the other side most of the time and lo and behold, the implant reosseointegrated again in its new location. Over the extended time that you mentioned, the patient selectively forgot about it or chose not to mention it in case you blame him/she for any residual problem.

Drilled Too Deep when Preparing Hole for Implant Insertion: Should I Be Concerned? | OsseoNews Discussions on Dental Implants

Drilled Too Deep when Preparing Hole for Implant Insertion: Should I Be Concerned? | OsseoNews Discussions on Dental Implants : "Having 1 or 2 mm extra depth to your implant is okay provided it did not traumatised any vital structures like the sinuses or the idn or the linqual or labial plates. Even so, if the implant does not impinge excessively into these structures, the body’s unrivalled healing abilities will cover up our misdemeanour. Of course we should rely primarily on our skill and foresight via thorough treatment planning to avoid these misdemeanours and only rely on the bodiy’s built in smart healing powers as a failsafe device. If in doubt about sterility, it does no harm to cover the patient with antibiotics. Might be helpful to also advice the patient to take some yogurt for those few days and some days after to replace any good bacteria in the gut that may have been destroyed. Cheers."