overshot bite brands

Photo 5 (top left): Mandibular incisor crowding typical of class I malocclusion. Photo 6 (top right): Class II brachygnathia overjet. Photo 7 (bottom left): Class II prognathia underbite. Photo 8 (bottom right): Ulcerated mandibular gingiva from maxillary canines.

The way teeth align with each other is termed occlusion. Normal occlusion in most medium and long-nosed breeds consists of the upper (maxillary) incisors just overlapping the lower (mandibular) incisors (scissor bite). (See Photo 1.) The lower canine should be located equidistant between the last (lateral) incisor and the upper canine tooth (Photo 2). The premolar tips of the lower jaw should point between the spaces of the upper jaw teeth (Photos 3 and 4).

Malocclusion refers to abnormal tooth alignment. Overbite (overshot, class two, overjet, mandibular brachygnathism) occurs when the lower jaw is shorter than the upper (Photo 6). There is a gap between the upper and lower incisors when the mouth is closed. The upper premolars are displaced at least 25 percent toward the front when compared to the lower premolars. An underbite (undershot, reverse scissor bite, prognathism, class 3) occurs when the lower teeth protrude in front of the upper jaw teeth (Photos 7, 8) If the upper and lower incisor teeth meet each other edge to edge, the occlusion is an even or level bite (Photo 11). When the upper and lower incisors do not overlap or even meet each other when the mouth is closed, the pet has an open bite . Anterior crossbite occurs when the canine and premolar teeth on both sides of the mouth occlude normally, but one or more of the lower incisors are positioned in front of the upper incisors (Photo 12). Anterior crossbite is the most common malocclusion, is not considered genetic or hereditary and is correctable. Posterior crossbite occurs when one or more of the premolar lower jaw teeth overlap the upper jaw teeth. This is a rare condition that occurs in the larger-nosed dog breeds. A wry mouth or wrybite occurs when one side of the jaw grows longer than the other. Lingually displaced mandibular (base narrow)canines occur when the mandibular canine teeth protrude inward causing penetrating damage to the upper palate. This condition is due to either persistent primary teeth or a too-narrow mandible and can usually be corrected through an orthodontic appliance (inclined plan) used to direct the teeth into normal occlusion. Rostrally deviated canine teeth occur when the maxillary or mandibular canine is directed forward and can usually be corrected by orthodontic movement, crown reduction or extraction.

Photo 9 (top left): Wry bite canine. Photo 10 (top right): Wry bite feline. Photo 11 (bottom left): Level bite. Photo 12 (bottom right): Anterior crossbite (maxillary left central incisor in reverse scissors occlusion).

Most people aren’t born with perfectly aligned teeth. Usually, slightly misaligned teeth don’t require any medical treatment. However, correcting an underbite, especially when it’s severe, can have big benefits.

This can reduce your risks of breaking a tooth and also painful symptoms of temporomandibular disorders, which are common with underbites. Some common treatments for underbite include:

Brushing and flossing your teeth regularly in addition to visiting a dentist for checkups and cleanings are important parts of treatment for healthy teeth. But those with an underbite or other dental issues must take special care of their teeth to prevent further damage and decay.

Medical treatment is the only way to truly correct an underbite and align teeth correctly. At the very least, medical treatment can improve the appearance of an underbite.

In less severe cases of underbite, a dentist may be able to use wire or plastic braces or other dental appliances to move the teeth into their correct place.

Removal of one or more teeth on the lower jaw may also help improve the appearance of an underbite if overcrowding of the teeth is contributing to the issue. A dentist may also use a grinding device to shave down or smooth teeth that are large or stick out.

The earlier an underbite is addressed, the better. If a child’s underbite is less severe, parents should wait until at least age 7 to seek corrective treatment such as braces. That’s when permanent teeth begin to erupt.

If your child has a severe underbite, especially if it’s caused by a birth defect such as cleft lip, early surgery may help. Talk to your child’s dentist and doctor to see what course of treatment they recommend.

Surgery has its risks and should only be used in children when underbite is interfering with their quality of life or ability to eat, breathe, or speak.

If your top teeth overlap your bottom teeth, you have an overbite and you may want to consider overbite correction.In the field of dentistry, an overbite is determined by how much your teeth overlap or how many of your upper teeth cover your lower teeth. An overbite is a completely normal occurrence. Nearly everybody has one. But, when your overbite is too small or too large, you may encounter problems. One problem is when your overbite is distinct. This results in what orthodontists call a deep bite. This type of bite may cause problems like pain, excessive wear, and aesthetic issues. If you do have a problematic overbite though, not to worry, overbite correction for adults is not difficult with the help of orthodontics.

The average overbite is around 2 – 4mm. This is a normal range and both your upper and lower teeth will be aesthetically appealing. If your overbite is smaller, your lower teeth will be more noticeable.  When there is a significantly reduced overbite or none at all, it’s referred to as an anterior open bite. With an anterior open bite, there’s usually a gap between your upper and lower teeth when your jaws are closed.

Some patients feel that this isn’t very attractive. If your overbite is increased, fewer of your lower teeth will show. In severe cases, this can lead to wear of your lower teeth or even trauma to the gums on the back of your upper central incisors.

Most overbites are the result of heredity or genetic factors. As our teeth grow when we’re children, they randomly emerge from your gums. They stop growing once they hit the adjacent teeth. It is this randomness that causes overbites and malocclusions, and it’s very common.

To make things worse, overbites can be exacerbated by early childhood habits like thumb sucking. Sucking your thumb puts pressure on your upper teeth. In turn, this forces them forward and places pressure on your lower jaw, forcing your jaw backward.

This type of overbite occurs when your teeth aren’t properly aligned. In such cases, your lower jaw may be well balanced with your upper jaw, but the misalignment of your teeth causes your lower jaw to force back towards your neck. Typically, nonsurgical treatments work well for this type of overbite correction for adults.A Skeletal Overbite

With this type of overbite, your lower jaw is too small to fit your upper jaw. As a result, the upper rows of teeth push forward over your small jaw. Skeletal overbites usually require surgical solutions to realign the jaw.

Correcting an overbite may just be a matter of wanting to enhance your appearance and smile. But you need to remember that if an overbite goes uncorrected, it can cause a range of dental and health problems.

For instance, overbites make speech difficult. As a result, you might suffer a speech impediment, or you may overcompensate when articulating certain words. An overbite can also make chewing difficult and in severe cases, result in gum damage. This happens when your lower front teeth come into contact with the gum line in the back of your upper front teeth. The upper teeth strike the gum line, resulting in your gums receding. Damaged gums equal tooth loss and gum disease.

What’s more, an overbite can result in tooth wear and damage, and even sleep apnoea. Jaw pain is another consequence of an uncorrected overbite. Misaligned jaws can lead to chronic jaw pain and even headaches, contributing to the development of Temporomandibular Joint Disorder (TMD).

Typically, a dentist will refer you to an orthodontist for overbite correction. Overbites tend to be easier to treat in children, since a child’s jaw is still developing, however overbite correction for adults is quite common.

For teens, overcrowded teeth is the most common problem. But for adults with an overbite, it is the lack of early preventative treatment that leads to more severe symptoms associated with overbites. When you seek treatment, your orthodontist will examine the area and create a treatment plan that may last for two or more years depending on the severity of your overbite.

Your orthodontist will start with x-rays, to determine what kind of overbite you have and the relationship between your jaw and teeth. From here, they will develop a treatment plan.

Over time, more options have become available to treat adult overbites. No matter which option you select, it’s always important to seek professional orthodontic advice first.

There are several alternatives available for overbite correction for adults. The right one for you will depend on the severity of your overbite, your budget and how long your treatment will take.

To find out which overbite correction will work for you, book a consultation at Medland Orthodontics either at our Brisbane clinic or Gold Coast practise today.

An underbite (undershot jaw, sow mouth, monkey mouth) is a case in which the lower jaw (mandible) protrudes out further than the upper jaw (maxilla), causing the lower teeth to protrude forward. It may result from a congenital defect (common in miniature breeds), or from injury or trauma to the lower jaw. An undershot is a situation in which the nipping teeth dont meet but the cheek teeth do. A true underbite involves abnormal occlusion of the cheek teeth too, and the development of overgrowth of unopposed teeth.

A dog underbite is a dental or skeletal condition characterized by lower teeth that extend outward farther than the upper front teeth. This condition is also called a Class-3 malocclusion.

Malocclusion in dogs causes an abnormal alignment of the teeth, which results in an abnormal bite. A dog whose lower jaw is protruding and with the bottom teeth sticking out when at rest is known as an underbite dog.

We will focus on “class 3 malocclusions,” also known as an underbite. This condition happens when the lower jaw teeth protrude forward relative to the upper jaw teeth.

Dental is probably the number one cause of malocclusion in dogs. Dental underbites occur when one or a couple of teeth are abnormally positioned within a normal facial skeletal structure, says Dr. Santiago Peralta, assistant professor of veterinary dentistry and oral surgery at Cornell University College of Veterinary Medicine (CUCVM).1

Dental underbite commonly happens when a baby tooth fails to fall out and is still present when a permanent tooth erupts. This causes crowding among teeth. Thus the abnormal position and underbite look in your dog.

This cause of underbite on dogs is the easiest to correct. According to Sacramento Veterinary Dental Services, the extraction of the primary teeth (interceptive orthodontics) should be performed as soon as possible to correct the problem.2

Skeletal underbite in dogs may be more problematic than dental.An abnormal mouth bone structure may cause the canine teeth or maxillary incisors to make abnormal contact with the gums causing severe distress and damage to your pup’s teeth and gums. This could fasten the rapid onset of periodontal disease.

“[A dog underbite] will be acquired, whether because something happened during gestation or something happened during growth and development. The condition can develop due to an infection, trauma, or any other event that may alter maxillofacial [face and jaw] growth.”

A dog underbite may also be caused by jaw fractures that don’t heal properly. Trauma to the face and jaw caused by bites, accidents, or getting hit by a car can cause your dog to develop an underbite.

Fortunately, most dog underbites do not require any treatment. If the underbite is not causing damage to a dog’s mouth (i.e., preventing chewing or swallowing), there may be no need for treatment.

1. Movement of secondary teeth passive or active force applied to teeth to correct their position or eruption angle to create a more comfortable bite.

Any dog breed can develop an underbite. However, Class 3 malocclusions (dog underbite) are more common in brachiocephalic dog breeds, like Pugs and Bulldogs. However, an underbite can appear in any dog breed.

Most malocclusions are genetic. It’s important to have your dog’s bite evaluated for non-symmetrical jaw growth by a professional, especially if your dog is brachycephalic.

Upon examination, your vet should recommend treatment if necessary. In some cases, underbites don’t cause any irritation and are nothing to worry about. Be sure to request a dental radiograph (X-rays) for your pet. This will help identify most oral diseases in dogs.

Orthodontic treatments for dogs with underbites vary in price depending on the condition, the number of teeth involved, rounds of anesthesia, among other factors. The treatment cost of malocclusion in dogs usually fluctuates between $1,500 and $4,000, according to PetMD.

Underbite in puppies may sometimes be corrected using braces. However, extraction and filling can also be applied. Treatment options for a puppy with underbites will vary depending on the type of malocclusion your pet faces, age, health status, and other factors.

Just like adult dogs, puppies with underbites are prone to health issues. If your dog has an underbite, seek medical attention to determine if your puppy’s underbite is detrimental to his health.

An underbite is permanent and generally does not get worse with age. Dogs with underbites do not have many problems. However, the main issue you may encounter is that the teeth align and rub against each other and create a wound within the gums or hard palate.

Switching from hard to soft dog food is advised when living with a dog with an underbite. Some dogs with underbites tend to have trouble chewing their food. Nom Nom fresh dog food is a great alternative to aid when this happens and to put less stress on your dog’s teeth when eating his food.

When it comes to dog treats for dogs with underbites, consider these soft-baked dog treats by Merrick or American Journey’s soft chewy dog treat. You also want to provide a soft chewing dog toy like Chuckit! Roller Dog Toy. Its textured chenille fabric is gentle on dogs’ mouths.

This helps promote fresher breath and cleaner mouth reducing the chances of periodontal disease, which is more common in dogs with underbites and present in 80% of dogs have by age 3. No toothbrush required.

Finally, dogs with underbites often develop excessive tartar and calculus build-up. Hence, it’s also a good idea to target the build-up of plaque and tartar with a Dental Formula Water to leave your dog’s teeth and gums in tip-top condition.

A dog’s bite typically sets at ten months old. It is unlikely that an underbite will improve on its own at this point. However, there is a chance that your dog’s underbite can worsen due to poor oral hygiene and neglecting the condition.

Most dogs that show underbite symptoms as a young puppy will likely have a dog underbite for the rest of their lives. This misalignment can sometimes self-correct as your dog develops, but if your dog is genetically predisposed, it is highly unlikely for this to happen. Dog underbite can be corrected through surgery and braces in some cases.

Genetics, accidents, dental or skeletal problems can lead to underbites in dogs. In some breeds, underbites are the result of intentional breeding practices. Breeders breed underbite dogs specifically to engineer the type of jaw structure of a bulldog or a boxer.

An underbite malocclusion can be considered normal and healthy as long as the dog can chew and eat solid food comfortably and their bite is functional. Some breeds of dogs, usually flat-faced or brachycephalic, are naturally born with underbites. These breeds have been genetically bred to have a lower jaw that is slightly longer than the upper.

Bulldogs have brachycephalic skulls, which means their faces are pushed inward. As a result, the upper jaw is usually shorter than the lower — underbite. In some bulldogs, the underbite is minor, while in others, it is extreme that they find eating difficult.

As a responsible underbite dog parent, you need to be proactive in checking your dog regularly for any developments that could cause substantive health and dental issues so they can live a long and healthy life by your side.

If you plan to adopt or buy a genetically predisposed underbite dog, you need to understand and meet the special care and potential treatment requirements of such a sog.

Granted, a perfectly aligned set of pearl whites is sought-after for a million-dollar smile in the human world. However, in the doggy world, having a canine malocclusion or underbite (misaligned teeth) is the least of their worries.

Depending on a pooch’s breed, an underbite is particularly regarded as the standard or could be a hereditary abnormality, which may usher in difficulties in eating, among other problems.

Nonetheless, knowledge is power! In this guide, we’ll explore the ins and outs of a dog underbite, including the causes, cost, and treatment. Knowing this can aid in the minimization of problems and curb the reoccurrence of irregular bites in bloodlines.

It describes a skeletal or dental condition characterized by the lower teeth protruding farther than the upper front teeth. A dog underbite is also known as a Class-3 malocclusion. In addition to creating an appearance in the face and mouth that closely resembles a bulldog, malocclusion triggers abnormal teeth alignment, which causes an irregular bite.

A pooch with a protruding lower jaw and bottom teeth sticking out when at rest is referred to as an underbite dog. Before we delve into whether or not underbite on pooches can be rectified, it’s essential to understand what causes it and its variations.

It’s probably the top cause of malocclusion in pooches. Dental underbite occurs when one or a few teeth are irregularly positioned within a regular facial skeletal structure. As puppies grow, they begin losing their milk teeth that are gradually substituted by the permanent ones.

However, in some instances, a puppy’s baby teeth don’t fall. Consequentially, they interfere with the permanent teeth that end up growing crookedly due to the lack of ample space. In relatively undershot bites, the incisors are the only teeth that contribute to the misalignment.

Nonetheless, the dental cause of a dog underbite is the easiest to rectify, provided that interceptive orthodontics (the extraction of primary teeth) is performed as soon as possible.

In some dog breeds, an underbite is a cherished quality that is part of the norm. For instance, pugs, boxers, Pekingese, and bulldogs are renowned for their brachycephalic features. In this scenario, an abnormal mouth bone structure may result in the maxillary incisors or teeth making irregular contact with the gums. Consequentially, this leads to adverse distress and damage to your canine’s gums and teeth.

With the irresistible shorter jaws and pushed-in faces that a multitude of people find adorable, the gap into which the teeth erupt is restricted, ushering in a malocclusion. Given that skeletal underbite in pooches is significantly more problematic than dental causes, this leads to the rapid development of periodontal disease.

Typically, a dog’s lower and upper teeth intersect in a ‘scissor bite’ when the jaw is closed. However, some scenarios arise whereby the lower teeth stick out in front of the upper ones causing a reverse scissor bite. Genetic causes of a dog underbite are seen in long and medium-muzzled pooches.

At times, the case of a dog underbite is acquired from the inappropriate tugging and chewing during the delicate stage of teething. Puppies then develop bite issues whereby their growing teeth shift from their initial position.

Dogs with adverse undershot bites may experience challenges in chewing. Furthermore, their soft tissues get damaged. At times, the undershot bite is adverse enough to require tooth extraction or orthodontic treatment.

Inform your vet immediately you spot the development of an underbite in your puppy. Early intervention can make all the difference in curbing more adverse issues.

However, it’s more prevalent in certain breeds than others. Although small dog breeds with underbite are the most common, boxers and other larger breeds are also susceptible. Here are a few examples:

If your dog has an underbite and you’re scratching your head wondering whether it can be rectified, fret not, as the answer is yes! The good news is most dog types of underbite don’t call for any treatment if it’s not interfering with the chewing and swallowing process.

Untreated underbite causes more than off-kilter smiles. As you may have guessed, dogs with malocclusion are susceptible to a wealth of health risks, as outlined below. It ushers in a life of discomfort for your beloved canine companion.

Granted, pooches with an underbite smile are as adorable as they come. However, this condition can trigger adverse oral problems, so it’s in the best interest of your pet to act as quickly as possible. If your pooch is exhibiting any of the symptoms mentioned above, we recommend visiting your local vet as soon as you can. They’ll then check for signs of infection and pain.

Upon examination, the vet will recommend treatment if need be. At times, an underbite doesn’t cause irritation, which should put you at ease. Nonetheless, ensure you request a type of X-ray known as a dental radiograph for your pet. It will easily pinpoint most oral ailments in dogs.

If you’re curious as to how much you’ll have to pay to correct your pup’s underbite, keep in mind that the orthodontic treatments vary based on various factors. They include the specific underbite condition, rounds of anesthesia, and the number of teeth involved. Typically, the price ranges from $1500 to $4000, after which your pet will need to visit the vet biweekly or weekly to monitor the progress.

Underbite in young dogs can be rectified using braces. Nonetheless, filling and extraction can also be applied. The treatment alternatives for a puppy with an underbite vary based on the type of malocclusion involved, their health status, and age.

As is the case with adult dogs, a puppy with an underbite is susceptible to health problems. If you notice an underbite, we recommend seeking medical attention to determine if it’s detrimental to their health. If you’re wondering whether your puppy will grow out of the underbite, the truth is, although it’s possible, the chances are slim to none if it’s genetic.

Symptomatic dog underbite can gain from early treatment and care to prevent eating challenges and pain, among other complications. With that being said, here’s a breakdown of a few ways to care for a pooch with an underbite.

We recommend switching from hard to soft food when residing with a pup with an underbite. After all, it’s a no-brainer that a dog underbite causes chewing problems.

A dog with an underbite typically develops excessive calculus and tartar. As such, targeting this build-up with dental formula water will keep your pooch’s gums and teeth in excellent condition.

While a dog underbite isn’t necessarily a problem, it’s undoubtedly a cause for concern. Turning a blind eye can usher in a boatload of health adversities for your pup, and that’s the last thing you need.

Therefore, as a responsible dog owner, you should be proactive in taking the steps we’ve discussed to pinpoint and treat an underbite for your pet to live a long, healthy, and happy life right by your side. Moreover, you need to exercise vigilance when it comes to planning regular checkups to monitor your pup’s health.

Lastly, without a shadow of a doubt, all pooches are worthy of equal care and love. However, we don’t recommend seeking out dog breeds that are susceptible to an underbite (regardless of how adorable they are) unless you can provide the much-needed care that includes hefty vet bills if complications crop up.

I debated on where to go next, but at the end of the day the most widely used fishing tool has to be an overshot. Some will say why not a spear? Well if you must ask, always go with the strongest fishing tool you can run to catch the fish. And if you run a spear, never plug the I.D. of your fish by breaking it off. Done with that!

The info that follows has been taken from the manuals published on overshots. I realize that paper manuals are a thing of the past, yes, yes at one time fishing tool hands carried massive catalog brief cases full of reference material. Now you have the luxury of your laptop loaded with information. If you have never sat down and read an overshot manual, now might be a good time.

The overshot is highly versatile and efficient tool. There are several different types of overshots, however each overshot is designed to engage a specific size of tubing, pipe, coupling, tool joint, drill collar or smooth OD tool.

The original overshot was developed by Bowen Oil Tools, which is now part of NOV. One thing I will point out is that in the catalogs you will see more than one assembly number for a given OD of Overshot, this came about due to the two locations developing their own variations. I found this information on NOV’s website and thought it was interesting to share.

Bowen™ became a leader in innovation with the creation of the first overshot, the Series 150, in 1935. This tool set the standard for fishing equipment, and the quick acceptance of the tool assured the company partners that their business would be successful. The company continued to create new products, building a reputation for their well tool design and construction.

Currently there are several manufacturers of overshots, NOV (Bowen), Rubicon (Logan) and Applied Oil Tools (Gotco). These overshots are designated by a series number as follows:Series 10 - Sucker Rod Overshot

Overshots may be identified by one of the following, known as “type”:Full Strength (FS) - engineered to withstand all pulling, jarring and torsional strain

The basic overshot (from top down) consists of a top sub, a bowl, grapple, control, and a guide. In addition to the basic components, some overshots (Series 10 and 150) can be dressed with either a:Spiral grapple used if the fish diameter is near the maximum catch of the overshot, or a

The Series 150 Overshot features the ability to packoff on the fish. When the circulating packoff is not used, the fluid circulates down the drillpipe, aroundthe top outside of the fish, through the slip or grapple assembly, around the guide shoe and up the annulus.

When the circulating packoff is used, the annular space between the top outside of the fish and the inside of the lower part of the overshot is packed off, diverting the fluid flow down into the fish, making it easier to release and recover the fish. Packoffs usually are not high pressure devices but will often withstand sufficient pressure to establish circulation through the fish. Third party high pressure packoffs are available from various sources.

The extension can be installed between the top sub and the bowl of the Series 10, 70, and 150 overshots. It is used to extend the overshot bowl to:Allow the grapple to catch farther down on a fish that may be necked down at the top by having been pulled in two, or latched by an overshot and released several times, or to

A stop ring must be used where a fish OD reduces immediately below the catch area to allow the grapple to bite on full-size pipe.Example - catching a Hydril upset or EUE collar. If the upset of collar should pass completely through the grapple, the overshot may not be releasable.

The Series 10 Sucker Rod Overshot is designed to engage and recover sucker rods, couplings, and similar items from inside tubing strings.Basket grapples are recommended for fishing for hardened and ground boxes (Sucker Rod Box).

The Series 20 Sucker Rod Overshot is a short catch tool which provides a means for engaging the exposed portion of a fish too short to be engaged with a Series 10 overshot.Uses basket grapples only

The Series 70 Short Catch Overshot is designed to engage the exposed portion of a fish too short to engage with Series 150 overshots.Uses basket grapple only

The Series 150 Releasing and Circulating Overshot is used to engage, packoff, and retrieve twisted-off lost tubing, drillpipecoupling, tool joint, casing or other similar fish.

A right hand wicker grapple converts a normal right release overshot to left hand release. This grapple is used where you expect to apply excessive right hand torque to release a packer, safety joint, etc. Note: Overshot will have to be released by left hand rotation.

High Pressure Packoff Assemblies:The High Pressure Packoff Assembly is an accessory to the Series 150 Overshots. It is used when high pressure circulation to the fish is required. It consists of a packoff sub with packing and packing rings and is installed between the top sub and bowl of the overshot. By running the packoff sub above the bowl, this design prevents the application of high internal pressures to the overshot bowl. The design of the High Pressure Packoff Assembly allows pressures two to three times the standard overshot packoff to be applied to the fish.

This information comes directly from the NOV manual for the Wide Catch Overshot. This is probably the first and only change to this common tool I know of in my career.

The Wide Catch Overshot provides the strongest tool available to externally engage, pack-off, and pull a fish that has been significantly worn. This tool has similar rugged design features and construction as the industry standard, Bowen Series 150 overshot, with the ability to interchange the Bottom Guide with the full range of existing components used with the standard Bowen Series 150 overshot.

In service, the Wide Catch Overshot (WCOS) takes a positive grip over a large area of fish and is capable of withstanding heavy pulling, torsion, and jarring strains without damage to the tools or the fish.

The WCOS has been designed to significantly increase the catch range of the OD of the fish to be caught, compared to the standard overshot. This enables a greater opportunity for a successful fishing operation in a reduced number of trips, thus reducing overall intervention costs for the operator. In addition to the large catch range, the WCOS has the ability to seal across very large extrusion gaps at both standard and high pressure and provide full circulation through the fish, should it be required.

Connections between the Top Sub/Bowl and Extension Sub have been designed to create a seal. This will prevent the connection from washing out should the overshot be required to be flowed through for a long period of time. In order to lock the Top Sub/Extension Sub to the Bowl from backing off during operation, set screws have become standard and will gall the threads should the connection break free.

The operation of all overshots is identical. The exception being that the Series 150 carries a packoff which provides circulation through the fish. First, determine that the overshot is properly assembled and dressed with the proper size grapple. Make up the overshot on the fishing string (normally it is run connected to the bottom of the bumper sub) and run it into the well. As the top of the fish is reached make sure circulation has been established to clear overshot ID of any plugging. Lower the overshot onto the top of the fish with no rotation at first. A 5,000 pound set down weight will be sufficient to engage the grapple. While lowering the overshot over the top of the fish watch for pressure build up, shut off pumps if any pressure build up is noticed. Should any back pressure be noticed, release the back pressure to allow the grapple to engage the fish. By elevating the string it can be determined, if the grapple went over and engaged the fish. If unable to work overshot over top of fish without rotation, then slowly rotate the fishing string to the right and gradually lower the overshot over the fish. Combined rotation and lowering over top of the fish are important to keep the grapple in the release position. This provides the maximum clearance between the grapple and fish. While lowering the overshot over the top of the fish, watch for torque build up and an increase in pump pressure. A pump pressure build up indicates the overshot has gone over the top of the fish thereby reducing the flow area. Stop rotation (continued rotation could dull the wickers of the grapple) enabling the grapple to set. Allow the right hand torque to slack out of the string and then pull on the string by elevating the string to set the grapple.

To release from the fish, bump down, then simultaneously rotate to the right and slowly elevate the fishing string. It is best to have a clean fishing top before running the overshot.

It appears that once evolution set jerboa bones on the path toward fusing together, they overshot the optimum amount of fusing—the structure that best dissipated stresses from jumping and landing—to become fully bonded.

Parrot mouth is the most common form of overshot jaw — this means the upper jaw is relatively longer than the lower jaw. Occasionally the reverse is true, producing a syndrome known as sow mouth.

Lastly, thewry mouth. It is a rare condition that mainly affects large-nose breeds. A crooked mouth or a wry bite happens when one side of the jaw is more significant.

In other cases, puppies can grow out of these incorrect bites. Wait until ten months old. If it’s not fixed then, going to the vet would be your first choice.

Treatments include tooth extraction, crown height reductions, or spacers. Remember to research breeders, as dogs with incorrect bites should not be used for breeding.

Problems can occur if a Chihuahua has a moderate to extreme undershot or an overshot jaw. With minor misalignment, not much will need to be done though the teeth will need to be monitored.