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Thread: Got PMMA yesterday.
- 08-30-2012 #51
Sperm travels through the urethra which is encapsulated by the CS which in turn is wrapped by the tunica, and the PMMA is way far from there don't worry
- 08-30-2012 #52
- 08-30-2012 #53
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- Aug 2012
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- 8
thank you bb and sorry if my comment sounded mean irish, the moderator told me it was not a nice thing to say
Last edited by Beyond Small !; 08-30-2012 at 07:07 PM.
- 08-30-2012 #54
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- Jan 2010
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- 302
Small,you have made 7 posts. Each one is cynical or vacuous, not humorous. Please stop!
- 08-30-2012 #55XitemeMGuest
- 08-30-2012 #56XitemeMGuest
About PMMA from Wiki
Poly(methyl methacrylate) - Wikipedia, the free encyclopedia
Poly(methyl methacrylate) (PMMA) is a transparentthermoplastic, often used as a lightweight or shatter-resistant alternative to glass. It is sometimes called acrylic glass. Chemically, it is the synthetic polymer of methyl methacrylate. The material was developed in 1928 in various laboratories, and was first brought to market in 1933 by the Rohm and Haas Company, under the trademark Plexiglas.[4] It has since been sold under many different names, including Lucite and Perspex.The often-seen spelling poly(methyl 2-methylpropanoate) with -an- is an error for poly(methyl 2-methylpropenoate), based on propenoic acid.
PMMA is an economical alternative to polycarbonate (PC) when extreme strength is not necessary. Additionally, PMMA does not contain the potentially harmful bisphenol-Asubunits found in polycarbonate. It is often preferred because of its moderate properties, easy handling and processing, and low cost, but behaves in a brittle manner when loaded, especially under an impact force, and is more prone to scratching than conventional inorganic glass.
Medical technologies and implants
- PMMA has a good degree of compatibility with human tissue, and can be used for replacement intraocular lenses in the eye when the original lens has been removed in the treatment of cataracts. This compatibility was discovered in WWII RAF pilots, whose eyes had been riddled with PMMA splinters coming from the side windows of their SupermarineSpitfire fighters – the plastic scarcely caused any rejection, compared to glass splinters coming from aircraft such as the Hawker Hurricane.[28] Historically, hard contact lenses were frequently made of this material. Soft contact lenses are often made of a related polymer, where acrylate monomers containing one or more hydroxyl groups make them hydrophilic.
- In orthopedic surgery, PMMA bone cement is used to affix implants and to remodel lost bone. It is supplied as a powder with liquid methyl methacrylate (MMA). When mixed these yield a dough-like cement that gradually hardens. Surgeons can judge the curing of the PMMA bone cement by pressing their thumb on it. Although PMMA is biologically compatible, MMA is considered to be an irritant and a possible carcinogen. PMMA has also been linked to cardiopulmonary events in the operating room due tohypotension.[29] Bone cement acts like a grout and not so much like a glue in arthroplasty. Although sticky, it does not bond to either the bone or the implant, it primarily fills the spaces between the prosthesis and the bone preventing motion. A disadvantage of this bone cement is that it heats up to 82.5 °C while setting that may cause thermal necrosis of neighboring tissue. A careful balance of initiators and monomers is needed to reduce the rate of polymerization, and thus the heat generated. A major consideration when using PMMA cement is the effect of stress shielding. Since PMMA has a Young's modulus greater than that of natural bone, the stresses are loaded into the cement and so the bone no longer receives the mechanical signals to continue bone remodeling and so resorption will occur.[30]
- Dentures are often made of PMMA, and can be color-matched to the patient's teeth & gum tissue. PMMA is also used in the production of ocular prostheses, such as the osteo-odonto-keratoprosthesis.
- In cosmetic surgery, tiny PMMA microspheres suspended in some biological fluid are injected under the skin to reduce wrinkles or scars permanently.
- A large majority of white Dental filling materials (i.e. composites) have PMMA as their main organic component.
- Emerging biotechnology and Biomedical research uses PMMA to create microfluidic lab-on-a-chip devices, which require 100 micrometre-wide geometries for routing liquids. These small geometries are amenable to using PMMA in a biochip fabrication process and offers moderate biocompatibility.
- Bioprocess chromatography columns use cast acrylic tubes as an alternative to glass and stainless steel. These are pressure rated and satisfy stringent requirements of materials for biocompatibility, toxicity and extractables.
- 09-07-2012 #57
How is your EQ? I know you said you had sex 48 hours after the operation, but was it harder to get it up and "maneuver" it? I would think a suddenly larger penis would be tougher to make stick up as hard as it used to however with time the body could adapt. Curious for your response, Irish
BPEL: 6.7-8.57" NBPEL: 6.3-8.25"
MEG: 5.9-6.5" HeadEG: 5.4-6.25" BEG: 6.25-7"
CI:1.5 -2.5
Flaccid: 5"x4.75" -> 6.25"x5.375" for +63% volume
275ml-435ml in 3 years, 6 months(active 2 years) for +58% volume
6.7x5.9 - 8.57x6.5 or bigger than 9/10x49/50 - 2999/3000x1666/1667
- 09-08-2012 #58
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Deleted
Last edited by Padawan787; 09-08-2012 at 07:44 PM. Reason: deleted because of overwhelming stupidity
- 09-08-2012 #59
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- 09-08-2012 #60
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- Jan 2010
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Thanks for responding, Irish. Thought the cynics had chased you off.
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