Over Denture-Definition,Advantages,Disadvantages

What is “Over Denture” (Definition)

a complete or partial removable denture supported by retained roots that is intended to provide improved support, stability, and tactile and proprioceptive sensation and to reduce ridge resorption.

Advantages of Over denture

•          Preserve alveolar ridge

•          Possibly
                -support
                -proprioreception
                -retention (eventually)
                -stress distribution

Disadvantages of Over denture

•          Poor oral hygiene

                            -caries and periodontal disease

•          Soft tissue undercuts
                -esthetics
                -retention

•          Breakage of denture
                -thin
                -stress concentration over abutments

Criteria of Selection of abutment teeth for over  denture

•          One per quadrant

•          Not adjacent teeth

•          Usually mandibular cuspids and premolars

•          Maxillary cuspids frequently cause esthetic and retention problems due to soft tissue undercuts

Overdentures

•          Regard as transitional

                - need perfect oral hygiene
                -daily non acidulated topical fluoride (sodium fluoride)

•          Probably better to place 2 implants

Head and Neck Radiology-How to Identify Important Structures in Different Radiographic Views

• Facial pain with “air/fluid level “on x-ray
• Bruit heard  in neck
• Trauma with questionable “blowout fracture”
• Difficulty swallowing with mass in lower neck
• Hoarseness
• Blurred vision
• Epistaxsis

 

Case Histories

• Facial pain
• Bruit heard  in neck
• Trauma to orbit
• Difficulty swallowing
• Neck mass in lower neck
• Blurred vision
• Epistaxsis 

Facial pain and nasal congestion

 

Trauma to orbit

Asymtomatic Bruit on physical exam

Palpable neck mass inferiorly

Hoarseness

Visual field defect –Blurred vision

Epistaxis