This document discusses contact points between teeth and issues that can arise from improper contact points in dental restorations. It defines contact points as the areas where adjacent teeth touch and lists their functions as maintaining a stable dental arch and preventing food impaction. Problems from faulty contacts include changing tooth anatomy, increased decay risk, and damage to periodontal tissue from food getting trapped. The document also discusses different matrix systems used in restorations to form temporary walls around prepared tooth structures, including Tofflemire, Automatrix, and Denovo matrices.

1. Case Presentation of
dislodged class 2
composite filling due
to poor contact point

2. What is Contact Point?
• Proximal contact area is the term used to donate
the area of proximal height of contour at the
mesial and distal surfaces of a tooth that touches
its adjacent tooth in the same arch.

3. Functions of interproximal
contact area:
• To maintain a stable dental arch.
• Properly located contact area allows
normal healthy interdental papilla to fill
the interproximal space.
• The prevention of food impaction in
interdental areas.

4. According to their shape:
• Tapering teeth
• Square type
• Ovoid type

5. Problems associated with
faulty contacts in restoration:
Improper contact size
Too Broad contact:
• It will change the tooth anatomy.
• With too broad contact, the interdental
area is difficult to clean.
• Increased risk of decay.

6. Too narrow contact:
• The embrasure size will increase leading to
impaction of food.
• Increase risk of damaging periodontal
tissue.

7. Open contact:
• Open contacts would create the problem ready
inflow of food causing accumulation of debris ,
plaque and damage to the periodontal disease

8. Matricing
• Is a procedure by which a temporary wall is
created opposite to axial wall that surrounds the
area of the tooth structure, which was lost
during tooth preparation.

9. Matallic Matrices
Circumferential
• Tofflemire (universal)
• Automatrix
• T-band matrix
• Siquveland
• Denovo

10. Metallic Matrices
Sectional
• Sectional
• Palodent
• Composi-tight
• Ivory
• T-matrix

11. Tofflemire (universal)
• Matrix band
• Matrix band retainer

13. Automatrix:
• They are fitted and tightened around the tooth
then held in place by a retainer clip
• It has advantage of time saving

15. Denovo:
• Supplied in 15 different sizes
• Saves time per patient as the bands are slipped
over the tooth and wedged in place in seconds

16. Siqveland matrix:

17. Wedge
• In this method, space is created by inserting
wedge shaped device between the teeth.

18. Management

19. THANK YOU