Factors Affecting Retention Of Denture Health And Social Care Essay

Factors Affecting Retention Of scale Health And Social C atomic number 18 probestableness is the prevention for home plate shank to move in a horizontal direction and from sliding front or back and stance to side.It is more important in lower have it away plateful.If the ridge is high and broader than there allow be better stability.Support is the ability of shell to move vertically towards the arch.It is provided by gums and buccal vestibule in inframaxillary arch mend in maxillary arch palate helps to incite crustal plate.In graze to subscribe grievous support photographic plate rims should be larger. magnificence OF COMPLETE DENTURENow a days.the dietary habits of the people increases demand of using shell as the tooth decay or loss whitethorn conk as a result of careis,periodontal destruction and un escortled diabetes.In order to achieve achievement in treatment, almost of the matters should be considered.In complete shell,the attitude and pauperization of t he patient should be evaluated.The dentist should know about the patients problem and demands and memory in mind try to meet expectations.The whole procedure in the fabrication of complete denture including problems in retention,support and stability of denture mustiness be explained to the patient.After this the dentist must work with the patient to get success in matters such as speech,mastication,esthetics and neuromascular control.By solving pateints complain positively,dentist can satisfy the patient and even train the patient to solve their problems in future.At perish,it is the calling of dentist to in institute patient that the success of complete denture depends on the detectance of denture at home as well as heavy(a) regular visits to dentist.FACTORS AFFECTING RETENTION OF DENTUREANATOMICAL FACTOR (DENTURE baby carriage AREA)Retention also depends on the size and quality of denture fashion battleground.The retention increases as the increase in size of denture pushchair region.Maxillary denture bearing area is 24 sq.cm and mandibular denture bearing area is slight(prenominal) 14 sq.cm. So mandibular denture has less retention than maxillary denture.http//www.drchetan.com/wp-content/uploads/2010/04/maxilla-mandible-denture-bearing-area.pngDr. Chetan Objectives of Impression making in complete denture 2010ROLE OFIMPRESSION MAKING FOR RETENTIONThe impression of complete denture is a very important step.The impression of the upper and lower jaw the outskirt of ridges,post dam area,recording of retromylohyoid fossa and recording of the depression of coronoid process in upper impression is important in to form good retentive denture.The break of meander during impression making is also important in this regard. duty period of the meanders also affect the retention. Those tissues which were displaced during impression making can rebound while using dentures, leading to loss of retention. Dr. Chetan 2010.ATMOSPHERIC PRESSUREThe atmospher ic thrust is considered to have some usage in complete denture retention.It is precisely workable when there is lower pressure chthonian the denture and front man of vaccum.The vaccum is created by applying pull which increase the volume amidst denture prat and on a lower floorlying tissue to maintain seal around some area for lower pressure to be constant.Thus the retention is produced beca make delectation of of pull and displacement.Some times the right(a) seal of acrylic to mucosa is not formed and some the opposite factors are indispensable. Thus, all parts of the system of denture and wearer are undetermined to the atmospheric pressure, and the hydraulic nature of the soft tissue means that, under expecting conditions this will be transmitted into the region betwixt denture and tissue hydrostatically. Under normal conditions as there is no pressure oddment and no static retaining index so the atmospheric pressure has no bearing on retention. (B. W. Darvell,and R. K. F. Clark.)ADHESIONAdhesion is the physical interaction amongst two unlike molecules with iodine another.In denture it is mainly applicable among the expectoration and the denture base material(acrylic resin).The closer the coat of denture and spittle,the affixation is increased.The affixation is more if contact angle is less.The wetting of saliva is more on oral examination mucosa than on denture base.thus adhesion also depends upon the pastelikeness of saliva.The thin layer binds more effectively than thickset only if filamentous saliva whitethorn have some advantage especially resisting incline into piazza between denture base and mucosa,this is negated if the film formed is thick in first place.COHESIONThis is a physical attraction of standardised molecules with each other and occur in saliva layer.If the saliva is less,there is attach reduction in cohesive force.This means if the larger the aerofoil area of denture base,there are more chances of cohesiv e force will act.These forces are less effective than cohesive forces.The formation of bubbles in saliva will also decrease retention.http//www.drchetan.com/wp-content/uploads/2010/04/retention-factors-impression.pngDr. Chetan Objectives of Impression making in complete denture 2010SURFACE TENSIONIt is the difficulty to seprate two well adapted muster having thin film of liquid between turn ups which is due cohesive forces occur at surface of liquid.It is like to the forces which causes the liquid to rise in capillary tubing tube. These forces are increased when the denture base is close to the mucosal surface.The fondle the palate,difficult to displace the denture as compared to high palate.WETTABILITYWhen a solid surface is wetted by liquid ,its retention increases .Some of the strength is required to break the adhesion between them.It there is no or less wetting,the less force is needed for the sepration of denture from saliva and there is lack of retention.Although,the acry lic is wetted by water but as the saliva is rich in proteins and mucoplysaccharides form a strong bond and create a more wettable surface.If the surface is treated by any material may be adsorbed by saliva so may not help in providing good retention.SURFACE ROUGHNESSIf the surface roughness is increased ,the adhesion between saliva and denture is also improved.GRAVITYIt is only appied when the denture is resting on mucosa under its own weight.In order to hold the denture gravitational force should be raised but in case of upper denture it may result in lack of retention and dropping of denture as person wearing denture face in descending(prenominal) position.The lower denture is only few grams in mass and change magnitude it can be resulted in fatigue of the jaw carrying load and may contribute to temporomandibular joint problems.VISCOSITYThe viscosity of saliva plays an important role in a sepration of two surfaces after the force is use.The viscosity of saliva is not under cont rol and is time dependent.The viscous material is recyclable in denture retention to some extent as slipstream of it with time can reduce efficacy.SEATING FORCEAfter the inserting denture in oral cavity ,a pressure or force is applied to get retention. The instantaneous effect will be to confirm the thinnest executable saliva film and so the best result is caused by the viscous retardation of displacement. This must also be achieved at the expense of some displacement of the supporting soft tissue, and if this created a better fit, it would not last long as that tissue rebounded elastically. (B. W. Darvell, and R. K. F. Clark)PERPHERAL SEALIn order to get good retention denture base is closely attach to the oral mucosa with a thin film of saliva between them .The severance of this may result in loss of retention. This can occur on the springs of denture because the endeavor of tissue here is under the control of musculature.so a layer of saliva should be maintained at the exte rnal surface of denture.If the flange of denture is thin and the tissues is at rest, the saliva flows rapidly between the tissue surfaces ,flange and then to the fitting surfaces will result in the weak displacement of denture.If the space between denture flange and tissue is narrow,there is speechless and even flow of saliva and the good retention of denture.The dimension of the flange of denture should promote the proper movement of muscle and overlying tissues without displacing denture base. If extension of denture is too far in the sulcus than the muscular movement can result in displacement of denture along with sulcus ulceration.If it is less extended into sulcus there is less retained saliva and the loss of retention.The upper denture is extended as far as possible but not on the soft palate.This shows that the posterior seal is not present.It is obtained if the displaced tissue also move with the denture during function.This can be done by making post dam area by creating raised grooves on posterior surface.BuccalComplianceLow pressureNarrow spacefor viscous flowSurface tension(B.W Darvell and R.K.F CLARK The Physical Mehanism Of Complete Denture Retention2000)ORAL AND FACIAL MASCULATUREThe normal movement of oral and seventh cranial nerve musculature can also provide retention,if the denture work in harmony with the muscles.The flanges of upper denture slope outwards and upwards in way that the action of buccinator muscle helps to shoes the denture.During incision,forces acting anteriorly on the denture is may tend to tip the denture and posterior border of denture move downwards because posteriorly the base of tongue may respond forces which occur anteriorly on denture.In case of lower denture,the buccal flange move outward and downward from the teeth so that the buccinators propely seat the denture.The lingual flange slopes towards floor of mouth helping the tongue to rest against it.The distal end of flange rests in retro mylohoid fossa to mai ntain peripheral seal and to prevent displacement of denture against lateral forces. occlusiveThe placement of artifical teeth and arch form should me maintain in the same postion as that of natural teeth so that they will work in a harmony with musculature.The teeth is then better to place in a neutral zone.In order to get balance occlusion the utmost number of teeth should be in contact with eachother.After the insertion of denture,high occlusal vagrant should be removed to enhance the efficacy and retention of denture.MECHANICAL AND opposite FACTORS AFFECTING RETENTIONThe under cut which is present on one side of the ridge helps in retention but bilateral under should be surgically corrected as they cause difficulty in retention of denture.The use of denure adhesives and pastes also improve the retention of denture.The magnets and suction magnetic disk also play an important role in this regard.Now a days,the use of suction disc is prohibited as continuous use of denture with suction disc affect the palate and may result in oroantral communication.The continuous use of denture in diabetic patient may loss retention due to bone resorbtion.Thus relining or rebasing of denture is required to increase retention.In pshycomotor patient retention of denture is a problem which is solved by proper counselling of patient. A training device is make in combination with an exercise program to teach muscle control for retention of a mandibular denture. It consists of a shellac record base which is connected with string to an extraoral spring balance scale. The patient is guided to use the tongue, cheek and lip muscles for denture retention. The patient is then instructed to displace the position record base by pulling on the scale. The increase in measurements on the scale show good resistance to displacement of the denture base.( Escoe R 1989)REFRENCES1.Escoe R. Psychomotor patient training to enhance retention of complete dentures. (1989) May-Jun2(3)243-4.2. Dr. Ch etan. Objectives of Impression making in complete denture( 2010).3. Terry Weber.Comfortable Dentures Need Support, Stability and Retention.4. David M. Roessler. Complete denture success for patients and dentists(2003).5. B. W. Darvell, and R. K. F. Clark, The physical mechanisms of complete denture retention(2000).