What are Dentures?What are Dentures?• Dentures are artificial replacements for Dentures are artificial replacements for

your natural teeth. Dentures will replace your natural teeth. Dentures will replace your missing and/or unhealthy teeth. your missing and/or unhealthy teeth.

• Dentures are removable. Complete Dentures are removable. Complete dentures are usually made of an acrylic dentures are usually made of an acrylic resin, while partial dentures are made from resin, while partial dentures are made from a combination of acrylic resin and metal.a combination of acrylic resin and metal.

• Dentures will restore your smile and Dentures will restore your smile and increase your chewing power.increase your chewing power.

Types of DenturesTypes of Dentures• The type of denture is based on the number of remaining The type of denture is based on the number of remaining

natural teeth. natural teeth. • Complete denturesComplete dentures cover the entire jaw and can be used cover the entire jaw and can be used

in place of your upper teeth, lower teeth or both. Complete in place of your upper teeth, lower teeth or both. Complete dentures consist of artificial teeth and gums. dentures consist of artificial teeth and gums.

• Partial denturesPartial dentures fit around remaining, healthy teeth. fit around remaining, healthy teeth. Partial dentures usually have artificial teeth and gums, Partial dentures usually have artificial teeth and gums, connected by a metal framework. Partial dentures are connected by a metal framework. Partial dentures are usually held in place by clasps that attach to the natural usually held in place by clasps that attach to the natural teeth. teeth.

• OverdenturesOverdentures fit over a few remaining teeth, roots or fit over a few remaining teeth, roots or dental implants. These structures give the denture stability. dental implants. These structures give the denture stability. To fit an overdenture, the natural teeth and roots usually To fit an overdenture, the natural teeth and roots usually need to be reshaped to fit in the denture.need to be reshaped to fit in the denture.

What exactly is an What exactly is an overdenture?overdenture?• An overdenture is a An overdenture is a

complete or partial complete or partial denture supported denture supported by by mucoperiosteum mucoperiosteum and prepared teeth and prepared teeth or roots.or roots.

Reasons that make Reasons that make overdentures popularoverdentures popular1.1. Improved methods of Improved methods of tooth tooth

conservationconservation and endodontics and endodontics2.2. Better Better hygienehygiene measures measures3.3. Less expensiveLess expensive than dental implants than dental implants 4.4. More number of teethMore number of teeth retained even retained even

at old ageat old age5.5. Improved standardsImproved standards of dental of dental

materials and technologymaterials and technology

Steps of overdenture Steps of overdenture constructionconstruction1.  Conventional 1.  Conventional

preparations are made preparations are made for root cap for root cap post post copingscopings..

2.  Full arch impressions 2.  Full arch impressions are taken so that the are taken so that the male posts may be male posts may be paralleled in the wax up.paralleled in the wax up.

3.  Models and dies are 3.  Models and dies are prepared and copings prepared and copings waxed.waxed.

Steps of overdenture Steps of overdenture constructionconstruction4.  Plastic male posts are 4.  Plastic male posts are

shortened to the desired shortened to the desired length from the gingival. length from the gingival.

5.  Lute the plastic male 5.  Lute the plastic male posts to the waxed posts to the waxed copings using parallel copings using parallel multiple attachments to multiple attachments to establish the best path establish the best path of insertion in relation to of insertion in relation to the configuration of the the configuration of the ridge and tissue ridge and tissue undercuts.undercuts.

6.  Sprue and cast the 6.  Sprue and cast the male plastic patterns. male plastic patterns.

Steps of overdenture Steps of overdenture constructionconstruction7.  Cover copings and 7.  Cover copings and

attachments with O-Rings in attachments with O-Rings in place with plaster, stone, or place with plaster, stone, or silicone putty. Set-up, try-in silicone putty. Set-up, try-in and finish in a normal way. and finish in a normal way.

8.  The dentist seats the denture.  8.  The dentist seats the denture.  The space created by the The space created by the stone or plaster over the stone or plaster over the copings during processing will copings during processing will allow the denture to seat allow the denture to seat without contacting the copings without contacting the copings or the attachments.or the attachments.

9.  The dentist allows the patient 9.  The dentist allows the patient to wear the denture for several to wear the denture for several days until the denture is well days until the denture is well seated and most adjustments seated and most adjustments have been made and the have been made and the patient is comfortable. patient is comfortable.

Steps of overdenture Steps of overdenture constructionconstruction10.  The dentist drills a 10.  The dentist drills a

hole from the lingual hole from the lingual of the denture through of the denture through to the void area to the void area around the around the attachment.attachment.

11.  The dentist decides 11.  The dentist decides whether the denture is whether the denture is to be immediately root to be immediately root supported or tissue supported or tissue resilient and to what resilient and to what degree.degree.

Benefits of overdenturesBenefits of overdentures1.1. Better supportBetter support due to PDL of due to PDL of

abutment teeth.abutment teeth.2.2. Improved retentionImproved retention by the use of by the use of

attachments.attachments.3.3. PreservationPreservation of alveolar bone. of alveolar bone.4.4. Masticatory efficiencyMasticatory efficiency more than more than

complete dentures.complete dentures.5.5. Psychological satisfaction.Psychological satisfaction.

Drawbacks…Drawbacks…1.1. Maintenance of Maintenance of good oral hygienegood oral hygiene is is

difficult.difficult.2.2. Increased lengthIncreased length of treatment. of treatment.3.3. UndercutsUndercuts around abutments pose around abutments pose

problems of insertion.problems of insertion.4.4. Lack of denture spaceLack of denture space leads to leads to

difficulty in placing denture teeth.difficulty in placing denture teeth.

Indications for overdenturesIndications for overdentures1.1. When few natural teeth remainWhen few natural teeth remain and the dentist thinks and the dentist thinks

that the patient will have difficulty adapting to a that the patient will have difficulty adapting to a complete denture.complete denture.

2.2. Maxillo-facial patients with cleft palateMaxillo-facial patients with cleft palate. Abutments . Abutments increase the stability and retention of overdenture and increase the stability and retention of overdenture and obturator.obturator.

3.3. When When remaining teeth are unsuitable for partial dentureremaining teeth are unsuitable for partial denture due to position, state or angulation of the crown.due to position, state or angulation of the crown.

4.4. If If mobile teethmobile teeth are present, overdentures act as a are present, overdentures act as a transition between partial and complete dentures.transition between partial and complete dentures.

5.5. In cases of In cases of extensive tooth wearextensive tooth wear, intentional reduction , intentional reduction and preparation of mutilated or shortened crowns is a and preparation of mutilated or shortened crowns is a logical form of treatment.logical form of treatment.

Steps of implant supported Steps of implant supported overdenturesoverdentures

Technological Technological advancementsadvancements

Magnets being used for retention

Technological Technological advancementsadvancements

Magnetic pins Complete overdentures with implants

Technological Technological advancementsadvancements

Metallic attachments

Studies involving Studies involving overdenturesoverdentures• Implant-retained mandibular overdentures versus Implant-retained mandibular overdentures versus

conventional dentures: 10 years of care and aftercareconventional dentures: 10 years of care and aftercareVisser A, Meijer JA Visser A, Meijer JA et alet al. . Int J Prosthodont Int J Prosthodont 2006; 2006; 19: 19: 271-278271-278

• These studies showed that These studies showed that Implant-supported overdentures Implant-supported overdentures reduce problems of lower denture retention and stabilityreduce problems of lower denture retention and stability, , but long-term follow-up studies on aftercare are lacking. but long-term follow-up studies on aftercare are lacking.

• There were no significant differences in mean times for There were no significant differences in mean times for prosthetic care and aftercare even including those subjects prosthetic care and aftercare even including those subjects with CDs who subsequently received ODs, but the initial OD with CDs who subsequently received ODs, but the initial OD groups took significantly more time for surgical care and groups took significantly more time for surgical care and aftercare.aftercare.

• The authors note that The authors note that patient satisfaction is greater with patient satisfaction is greater with ODs.ODs.

Studies involving Studies involving overdenturesoverdentures• Philosophies and principles of removable partial overdentures. Philosophies and principles of removable partial overdentures.

Dent Clin North Am. 1990 Oct;34(4):589-92 Dent Clin North Am. 1990 Oct;34(4):589-92

• Retention of remaining teeth for use as overdenture Retention of remaining teeth for use as overdenture abutments has been widely used in the discipline of complete abutments has been widely used in the discipline of complete denture therapy, but has frequently been overlooked as a denture therapy, but has frequently been overlooked as a means of enhancing removable partial denture therapy. There means of enhancing removable partial denture therapy. There are considerable advantages in are considerable advantages in retaining even severely retaining even severely compromised teethcompromised teeth that can be included in a treatment plan that can be included in a treatment plan for providing removable partial overdentures. for providing removable partial overdentures.

• The value of such teeth in providing The value of such teeth in providing aesthetic improvement, aesthetic improvement, residual bone retention, denture base support, primary or residual bone retention, denture base support, primary or secondary retention, and improved stabilitysecondary retention, and improved stability should be of should be of primary importance in treatment planning.primary importance in treatment planning.

• Presented by:Presented by:Final year BDSFinal year BDS

1.1. Aleena (lean mean fighting Aleena (lean mean fighting machine)machine)

2.2. Ammar (hamesha bemar)Ammar (hamesha bemar)3.3. Anoud (cool dude)Anoud (cool dude)4.4. Anum (janum janum)Anum (janum janum)5.5. Asma (jootae ka tasma)Asma (jootae ka tasma)6.6. Huda ( faludha)Huda ( faludha)7.7. Shahrbano (mano yea na Shahrbano (mano yea na

mano)mano)8.8. Sumaira ( kis kis ko mara)Sumaira ( kis kis ko mara)9.9. And the rest of final yearAnd the rest of final year10.10. Fahad khanFahad khan11.11. Except danny and fattyExcept danny and fatty12.12. Sheri (poison beri)Sheri (poison beri)