Undesirable undercut: other than that used to retain the RPDA removable partial denture (RPD) is a denture for a partially edentulous patient who desires to have replacement teeth for functional or aesthetic reasons and who cannot have a bridge (a fixed partial denture) for any reason, such as a lack of required teeth to serve as support for a bridge (i.e. distal abutments) or ...https://en.wikipedia.org › wiki › Removable_partial_denture
Desirable vs.
Undercuts exist because of natural tooth morphology and contours. Aligners rely on these naturally-occurring desirable undercuts for normal retention. Undesirable undercuts, however, are too retentive, making it difficult to remove impressions or aligners.
Retainers. Direct retainers are used to provide retention for the RPD; resisting the movement of the prosthesis away from the tissue surface. The terminal tip of a direct retainer (retentive clasp) passes below the height of contour (HOC) to engage a 0.01-inch or 0.02-inch undercut.
Undercut gauges
They are used to measure the extent of the undercuts on abutment teeth that are being used for clasp retention, usually there are available in three gauges: 0.01, 0.02, and 0.03 inch.
If the weld has undercut its entire length that did not exceed 1/32 in. deep, it's acceptable.
Any face shape can pull off an undercut, but the length of the remaining hair will be important in the same way it is for any cut.
“Growing out an undercut can seem like a challenge, but with a little bit of patience and time, it can definitely be achieved,” Rodriguez says. If you have really short hair and your undercut is a more subtle design, it should only take a few months to grow out.
Unprofessional Hairstyles You Should Definitely Avoid: Messy Bun. Provocative Undercuts.
Blocking out undercuts helps to aid the path of insertion. Some undercuts may need to be blocked out as they will interfere with the insertion of the Appliance. Undercuts exist because of natural tooth morphology and contours. Aligners rely on these naturally-occurring desirable undercuts for normal retention.
On turned parts an undercut is also known as a neck or "relief groove". They are often used at the end of the threaded portion of a shaft or screw to provide clearance for the cutting tool, and also referred to as thread relief in this context.
The word “undercut” has a negative connotation when used to undermine or dismiss someone. However; the term is used in construction to define the act of removing unstable sub grade or base course. The more technical term is Excavation Below Sub grade (EBS).
So what's the maintenance like for an undercut? It is recommended that you come in every two weeks for a touch-up. Two weeks is just about the time when the hair is grown out enough and the design isn't very easily distinguishable. Of course, as with all hairstyles, upkeep depends on hair type and texture.
If you want to ease your way into an undercut, keep it at 13- to 16-mm. For a bolder undercut, go for 6- to 10-mm. When you're trying an undercut for the first time, it's best to go for a longer cut. You can always go shorter, but you'll have to wait for your hair to grow out if you cut it too short to begin with.
High Maintenance Hairstyle #1: Undercut / Side Shave
While it looks suave when you step out of the salon, you'll start to see the growing sides after just a week. Men's hair is known to grow fast and require trims every month or so, but a short cut like this will require even more maintenance.
Historically, the undercut has been associated with poverty and inability to afford a barber competent enough to blend in the sides, as on a short back and sides haircut. From the turn of the 20th century until the 1920s, the undercut was popular among young working-class men, especially members of street gangs.
One reason for this defect is excessive current, causing the edges of the joint to melt and drain into the weld; this leaves a drain-like impression along the length of the weld. Another reason is if a poor technique is used that does not deposit enough filler metal along the edges of the weld.
Undercuts have been a trendy way to switch up your look for women. What is an undercut? It is when the side(s) and/or the nape of your neck is shaved or cut really low. You can also have designs added to your cut or even have it colored. Undercuts are popular and one of the reasons is due to the versatility.
Round face shapes benefit the most from Undercuts. The tight sides emphasise volume on top and elongate the face. An Undercut also provides an angular finish that can be accentuated with a hard Side Part.
The major benefit of an undercut is that there's less hair to deal with. Sure, you get a sweet look, but you don't have to opt for a ton of layers of hair to find it. The benefit here? Less hair = less weight.
Classic modern disconnected undercut. Basically, it's defined as closely shaven sides with long hair on top and no or minimal fade. In this case, I have enough for a side part and I have it in a very classic style that's more gentleman oriented from the 1920's and 30's.
Barbers have a sort of love-hate relationship with their clients bringing in photos. We love when you have a reference because we want to know exactly what kind of hairstyle you're looking for. But we hate when you bring in pictures that are totally unrealistic.