Single complete dentureDR.HARSHA VARDHAN K.VSVSIDSThe prevalence of the condition where one edentulous arch opposesa natural or restored dentition is quite common. The primaryconsideration for a complete denture service is the preservation of thatwhich remains, a single conventional denture may be desirable when it isto oppose any one of the following:-11) Natural teeth that are sucient in number not to necessitate a !"edor removable partial denture.#) $partiallyedentulousarchinwhichthemissingteethhavebeenreplaced by a %&'.() $ partially edentulous arch in which the missing teeth will be) havebeen replaced by *&'.+) $n e"isting ,'.-ost commonly, it isthema"illaryarchwhichistheedentulousarch, the reason being that it is easier to retain, ma"illary, ,' in positionbecauseit is morestable, better toleratedbypatients andeasier tofabricate than mandibular dentures.DIAGNOSIS AND TREATMENT PLANNINGThe commonly cited long termgoal in prosthodontics is thepreservation of that which remains salient considerations are:-a) $cceptable interocclusal distanceb) .table/awrelationshipwith bilateral tooth contacts inretrudedclosure.c) .table tooth quadrant relationship, with a"ially directed forces.d) -ultidirectional toothcontactthroughoutasmall range0#mm)ofmandibular movements.These are the physiological characteristics seen mainly in dentatepatients but when only one arch is edentulous, unfavourable forcedistributions may cause adverse tissue changes. 1t is therefore, importantto identify some clinical changes and correct them.1. 2"tensivemorphologicchangesindenturefoundationresultinginarch relationship and occlusal plane discrepancies. #. 3aw relationship e"tremes. (. 2"cessively displaceable denture displacing tissues.1) *outine morphologic changes occur following e"tractions leading to asmaller ma"illa than in the dentulous state. Thus, creating a hori4ontaldiscrepancybetweenarches anteriorlyandposteriorly. This ma5es itdicult to direct the occlusal forces to the denture bearing areas as thesupport is at a distance from the tooth contact..olution: *eversehori4ontal overlapor crossbiteplacement of arti!cialteeth. 'isadvantage: .uch a solution is not possible for anterior defect due tothe esthetic impact on the lip because of such tooth positions. #) 2"cessively displaceable tissues:-ainproblemhereisoneof di6erential supportcapabilityof thesame load. The forces of occlusion are resisted by the mucoperiosteum,2which allows some movement of denture base by virtue of its resiliency.7ut when movement of denture under load is great in one area than other dislodgement.These tissue changes ultimately lead to what is called as the singledenture syndrome in which patient compliances of loose or tiltingdentures and on e"amination damage to the mucosa and ridge resorptioncan be observed. -anagement includes treatment with reliners and tissueconditioners which temporarily cure the problem but the cycle of trauma,resorption and looseness continues.Thepatient becomesdissatis!edandedentulousridgecontinuesgetting resorbed. I! Single M"#ill"r$ %.D. oppo&ing n"tur"l m"ndi'ul"r teet(-ore commonly seen than the single mandibular ,'is singlema"illary ,'.The number of mandibular considerations should include 1stmolarsandanterior in,lass1 and11 /aw. 1n,lass111 8anteriorsandpremolars.Theocclusal formof natural teethact asguidesfortheocclusalform of arti!cial teeth.1n most situations it is the cusp form but if naturalteeth are present than monoplane teeth can be used. %or acceptable aesthetics:-1. *eposition mandibular anterior teeth orthodontically#. $lter the clinical crowns by grinding or with restoration(. 7alanced occlusion in ,* and not eccentric restoration II! Single m"#ill"r$ %D oppo&ing m"ndi'ul"r "rc( )it( *#edpro&t(e&i&III! Single m"#ill"r$ %D oppo&ing m"ndi'ul"r "rc )it( RPD. 2specially completing edentulous ma"illae and partially edentulousand mandible with only anterior teeth remaining is a common situation combination syn. THE SINGLE %OMPLETE MA+ILLAR, DENT-RE-ay be opposing all or some of mandibular natural dentition. 'iculties encountered in such situations can be due to:- a) -alposed or supraerupted teeth in lower ma5ing it di6er to achievea harmonious balanced occlusion.b) Thepositionof mandibularanteriorteethmayma5etheestheticand phonetic placement of ma"illary anterior teeth dicult withoutintroducing anterior interference in eccentric functional movement. c) $nother problem is that of abrasion of arti!cial teeth if acrylic resinused or of natural teeth if porcelain arti!cial teeth are used. 3Di"gno&i& "nd Tre"tment Pl"nning1) The !rst method was originally described by .wenson 019:+).The ma"illary and mandibular casts are mounted on the articulatorusingaprovisional ,*recordat anacceptablevertical dimension. $ma"illary base is made and the denture teeth are set, if they are seen tointerfere with the lower teeth, this areas are mar5ed on the cast and thenatural teeth are modi!ed using this cast as the guide. 1f moremodi!cation are required the procedure can be repeated once themodi!cation are satisfactory the denture is prepared for a try-in.11) -ethod by ;ur5stas 019: