Injection overmolding of the cervical margin

Performed by: Marco Maiolino DDS


The case is the restoration of a small mesial decay but the patient complained about food entrapment due to poor contact point . The tooth is mesially tilted. Doing a conventional composite restoration in these cases exposes to over contour the proximal restoration and give scarce support to the new marginal ridge , thus the high risk of fracture of the composite . Injection overmolding of the cervical margin is a clinical solution to improve the anatomy and support of the marginal ridge.



#1 Pre operative view of a maxillary first molar




#2 Cavity cleaned and wedge (positioned from palatal in order to avoid pushing the matrix on the margin)




#3 Ring application and matrix stabilization with some flowable.




#4 Final restoration with injection molding technique




#5 View of the new anatomy of the inter proximal wall




#6 Closed view of the overmolding of the cervical margin.



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