AIM To compare the retention force value alterations of four different types of implant overdenture attachments over various time intervals. MATERIALS AND METHODS 28 cuboidal blocks were fabricated using autopolymerising acrylic resin. Four of these were used as master blocks, one for each group. Master blocks for Group A and B contained an implant analog with ball abutment, for Group C contained a single piece implant with ball abutment and for Group D contained an implant analog with Locator abutment. Six blocks for each group were used as prosthetic blocks, which included the overdenture attachment to be studied. Prosthetic blocks for Group A contained nylon cap - clear attachments, Group B contained nylon cap - pink attachments, Group C …show more content…
The nylon cap and Locator attachments are made of plastic/nylon and O-ring attachments are made of silicone rubber. The high retention capability of the Locator system can be attributed to the dual retention characteristic of the Locator attachment system, which comprises of inner and outer aspect of the patrix, and titanium matrix linked to the implant. The mode of retention for these attachments is "frictional" and the "dimensional misfit between the slightly oversized nylon male insert and smaller diameter inner ring of the abutment". The greater cross section of the locator abutment increases surface area available for frictional contact between its components. Furthermore, the cylindrical profile of the component provides supplementary retention as the retentive areas are adjacent to parallel surfaces. The nylon cap attachment is an analog to the ball abutment and engages it from the undercut, while the O-ring is a doughnut shaped attachment. According to Petropolous et al, "the strain energy absorbed during insertion may be divided into elastic (recoverable) and plastic (permanent) components. If the deformation is elastic, no loss of retention is expected. If permanent deformation occurs, incomplete recovery occurs leading to rapid loss of retention." According to Craig,44 "a material that is momentarily submitted to stress below its yield strength returns to its original form without any internal or structural change. However, if this stress is repetitive as in a fatigue process, the material can suffer definitive
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Invisalign braces are frequently used in place of traditional metal braces because they are almost unnoticeable. Invisalign braces are clear which allows them to seamlessly blend in with your teeth. These braces need to be worn throughout the majority of the day in order for you to notice results. When you first begin to wear your Invisalign braces it will take a few days for your teeth to adjust to the fit and feel of the braces. This often results in pain and discomfort.
Death: a reality that rarely crosses people 's mind, with a major exception being when one crosses the threshold of an operating room. The operating room holds a special terror for both patients and their family members. For the patients, they must face the possibility that they could fall into an eternal slumber, and for the family members, they must recognize the fact that their beloved has a chance of not surviving. It is even more agonizing when a new procedure like the anterior approach hip replacement fails to uphold its reputation: one as a new, innovated technique meant to improve the quality of life, not destroy it. The mortality rate for the anterior approach hip replacement is far too devastating considering the fact that the posterior
Unfortunately, it appears that we are currently encountering more than usual difficulty in obtaining the necessary number of hospitals that are required the evaluation of our Extension Set 806-01, RE-0487 with the plastic slide clamp. Worrying about this, only seven hospitals in the group has now made the decision to perform an evaluation of this product and approximately nine or ten evaluation hospitals are required in order to achieve the purpose of assessing the functional use of the new plastic side clamp.
Prosthetic limbs consists of a fitted socket, an internal structure, knee cuffs and belts that are attached to the body. Prosthetics socks cushion the area of contact and realistic-looking skin. Prosthetic devices are lightweight because its material is made from plastic. Some parts of the limb are made of wood and rubber. One model of a prosthetic limb is the leg, which is made of layers of stockinet cloth.
A dental implant is a synethic tooth root which is place into the jaw to hold a bridge or tooth replacements. Who Are Dental Implants For? In general, dental implants are for anyone who has lost a tooth. However when it comes to getting one, it 's important that you have good health because some conditions can affect if they are in ideal for you such as smoking, alchcoholism, cancer as well as radiation of the jaw for example.
Names: ___Brooke Mento, Brianna Spencer, Megan Soucy___ Title: Bracing versus Adhesive Taping: What is the Best Prevention Strategy for Your Athletes? Introduction: Ankle injuries are the most commonly occurring athletic injuries in the world.
Orthodontics is the branch of dentistry that corrects teeth and jaws that are positioned improperly. Crooked teeth and teeth that do not fit together correctly are harder to keep clean, are at risk of being lost early due to tooth decay and periodontal disease, and cause extra stress on the chewing muscles that can lead to headaches, TMJ syndrome and neck, shoulder and back pain. Teeth that are crooked or not in the right place can also detract from one 's appearance. The benefits of orthodontic treatment include a healthier mouth, a more pleasing appearance, and teeth that are more likely to last a lifetime.
Are you looking for a straighter, whiter, less-gummy, or better-shaped smile? Our Charlotte, NC dental office offers a variety of cosmetic solutions that can help you look great and feel wonderful about yourself. Our cosmetic solutions can help you achieve the smile you have always dreamed about! Read on to learn more about each of our options.
. Overgrowth is not routinely seen in girls older than 8 years or boys older than 10 years.1,9 There is a little disagreement concerning the treatment of long bone fractures in children less than 5 years (POP cast) and adolescents older than 14 years (locked intramedullary nailing).13 Controversy persists regarding the age between 5 to 14 years, with several available options: external fixation, flexible stable intramedullary nails, plate fixation, and locked intramedullary nailing. Intramedullary nailing for treatment of fracture shaft of tibia is well known in children.
Nowadays, it is common to see people with braces in their teeth. You will note that a decade ago, it was relatively rare to come across a person with dental braces. However, times have changed. You will discover that in a group of one hundred individuals, one of them is wearing dental braces. Dental braces have become very essential nowadays.
The second specimen was AA 5052, which had low strength, but high ductility. The last specimen used was AA 6061, which has moderate strength and is highly resistant to corrosion. Procedure: To test each specimen, a tension test machine was used. Three specimens were tested: AA 2024, AA 5052, and AA 6061.
Meta-analysis of the accuracy revealed a mean error of 0.9 mm at the entry point (n = 1,530), 1.3 mm at the implant apex (n = 1,465), and a mean angular deviation of 3.5 degrees (n = 1,854) with a wide range in all measurements. "(Bornstein et al. 2014) In an approach to reduce the drawbacks of immediate implant placement and to gain the advantages of the computer guided implant placement, this study is proposed to compare between the accuracy of free hand and computer guided immediate implant placement.