[C. Christensen, Danish dentist and educator] A gap occurring in the natural dentition or between the opposing posterior flat occlusal rims when the mandible is protruded (posterior open bite). It can lead to instability in full dentures unless compensating curves are incorporated into the dentures.
How can you avoid Christensen phenomenon in complete dentures?
The space that occurred between the upper and lower posterior teeth is called Christensen phenomenon. In order to avoid this phenomenon the curves Spee and Wilson must be constructed.
What is bilateral balanced occlusion?
Bilateral balanced occlusion is observed when simultaneous contacts achieved in both centric and eccentric positions. Non-balanced occlusion is seen when teeth do not occlude in simultaneous contacts.
What is Realeff effect?
This characteristic feature of mucosa is due to its resilient nature which Hanau has described as “Realeff” or resiliency like effect. Mechanical or pathological reasons cause fibrous changes in residual ridge, making it resilient it is more commonly seen in mandibular resorbed ridges and maxillary anterior ridges.What is Pound's triangle?
He recommended that the lingual surfaces of mandibular posterior denture teeth should occupy an area bounded by two lines originating from the mesial surface of the mandibular canine and extending posteriorly to the lingual and buccal aspect of the retromolarpad. This area has been called Pound triangle (5, 8, 9).
What is closest speaking space?
The space between the teeth during casual repetition of the sound “s.” It is considered the closest relationship of the occlusal surfaces and incisal edges of the mandibular teeth to the maxillary teeth during function and rapid speech.
What is neutral zone in prosthodontics?
The neutral zone is that area in the potential denture space where the forces of the tongue pressing outward are neutralized by forces of the cheeks and lips pressing inward.
What is bull rule dentistry?
If interferences exists in the working side reduce either the “Maxillary buccal cusps lingual inclines or the Mandibular lingual cusps buccal inclines.” This is called B.U.L.L. rule.What is combination syndrome?
Combination syndrome (CS) is a dental condition that is commonly seen in patients with a completely edentulous maxilla and partially edentulous mandible with preserved anterior teeth.
What is a resilient liner?Resilient liners are soft and elastic materials that have proved to be an excellent clinical adjunct in the management of patients with chronic denture soreness and have also found a wide range of applications in the field of maxillofacial prosthesis.
Article first time published onWhat is Neutrocentric occlusion?
Neutrocentric concept[2,4,6] In 1954, De van formalized guidelines for using flat teeth in his “Neutrocentric concepts,” which stated flat occlusal surfaces should have: Flat planes in all directions with no inclination at all in respect to the underlying denture foundation.
What is CR position?
Nowadays centric relation is defined as a musculoskeletal stable position, with the condyles forward, as far upward as possible, centered transversely and with the articular disc properly interposed.[1,4–10] Centric relation (CR) is a musculoskeletal position, anatomically determined, repeatable and reproducible [10].
What is Bennett angle?
Bennett angle is the angle. formed between the sagittal. plane and the average path. of the advancing condyle as. viewed in the horizontal plane.
What is eccentric occlusion?
eccentric occlusion occlusion of the teeth when the lower jaw has moved from the centric position.
What is pound technique?
This is a special denture construction technique developed by my mentor, Dr. Earl Pound for treating patients who have trouble wearing dentures. It requires construction of a set of “treatment dentures” that are used to return the patient’s oral tissues to health and reestablish a comfortable and functional occlusion.
What is obturator in dentistry?
An obturator is a device that fills a gap created by surgical resection. If the soft palate is removed (or, for that matter, part of the hard palate), an obturator can be used to facilitate separation of the oral and nasal cavities.
Is proximal plate an indirect retainer?
The proximal plates, adjacent to the edentulous areas, also provide indirect retention. although it is customary to identify the entire assembly as the indirect retainer, it should be remembered that the rest is actually the indirect retainer united to the major connector by a minor connector.
Where is neutral zone?
A neutral zone is a delimited zone bordering at least one of the states that has agreed to set up a neutral territory. This has occurred in the past and/or present for: Neutral Ground (Louisiana), a disputed area between Spanish Texas and the United States’ newly acquired Louisiana Purchase, from 1806 to 1821.
What is Gothic arch tracing?
Traditionally, a device known as a Gothic arch tracer has been used to record mandibular movement in the horizontal plane. It consists of a recording plate attached, to the maxillary teeth and a recording stylus attached to the mandibular teeth.
What is freeway space?
The interval between the upper and lower teeth when the mandible is in the physiologic rest position is commonly known as the freeway space. … The freeway space is now generally recognized as a normal and necessary feature of normal occlusal function.
How much is closest speaking space?
The position of the line when the patient says yesss…. Notice that the distance from the line to the incisal edge of the s sound is about 1mm. A new line is drawn at the incisal edge position that is repeated during the s sound. This is called the closest speaking line.
What is Kelly's syndrome?
Kelly’s theory suggests that negative pressure within the maxillary denture pulls the tuberosities down, as the anterior ridge is driven upward by the anterior occlusion. The functional load will then direct stress to the mandibular distal extension and cause bony resorption of the posterior mandibular ridge.
What is a spoon denture?
A maxillary provisional removable dental prosthesis, without clasps, whose palatal resin base resembles the shape of a spoon. The resin base does not contact the lingual surfaces of the teeth and is confined to the central portion of the palate.
What is denture stomatitis caused by?
Denture stomatitis (or oral stomatitis) is usually caused by candida — a type of fungus (yeast). It’s normal to have small amounts of candida in your mouth.
What is anatomical crown?
The anatomical crown is all of the tooth that is covered with the enamel. Then the clinical crown is a portion of the anatomical crown that is visible. The clinical crown is the part of the tooth that you see when you look in the mouth.
What is a Richmond crown?
Richmond crown is a single-piece, post-retained crown with a porcelain facing designed to function as bridge retainer. Richmond crown is not a post and core system but it is customized castable post and crown system as both are single unit and casted together.
How many roots do permanent maxillary molars have?
Most previous studies on maxillary molars have reported that these teeth usually have three roots and four canals since an extra canal is often found in the mesiobuccal root. Other anatomical variations in the form of an extra C-shaped canal have also been reported in distobuccal and palatal roots.
What is tissue conditioning dental?
What Is It? Tissue conditioning allows us to help your gums out while they are still healing, while allowing you to wear your denture pieces. Often, tissue conditioning consists of a soft insert into your dentures that rests on your gums when you put your dentures in.
What is resilience simple?
Resilience is the ability to withstand adversity and bounce back from difficult life events. Being resilient does not mean that people don’t experience stress, emotional upheaval, and suffering. … Resilient people tap into their strengths and support systems to overcome challenges and work through problems.
Why does Christensen's phenomenon occur?
[C. Christensen, Danish dentist and educator] A gap occurring in the natural dentition or between the opposing posterior flat occlusal rims when the mandible is protruded (posterior open bite). It can lead to instability in full dentures unless compensating curves are incorporated into the dentures.
What is denture granuloma?
” The denture granuloma is a similar lesion to the fibro−epithelial polyp, modif- ied by the morphology of the tissues and by the nature of the irritant”(6). Hyper- plastic soft tissue is often found in the ede- ntulous mouth near the periphery of dent- ures or under their fitting surface(7−9).
