|  | After decay is removed from 
                          a tooth, something must be placed in that space to give 
                          strength back to the tooth.  Fillings: Fillings are the most common restorative 
                          procedure.  Inlays and onlays: In addition to fillings, 
                          lab fabricated inlays and onlays are sometimes used. 
                          Although many patients think of these as fillings as 
                          well, they are actually different since they are laboratory 
                          fabricated. 
 
                           
                            |  Silver (amalgam) fillings: Silver fillings 
                              have been used reliably for many years. Typically, 
                              silver fillings are placed on back teeth (molars). 
                              They are an economical way of providing a lasting 
                              restoration for most cavities. 
                              The material is specially formulated to withstand 
                              years of chewing pressure. |  
 
                           
                            |  White fillings: White fillings are an alternative 
                              to silver (amalgam) fillings. White fillings are 
                              made of a strong composite resin that is matched 
                              to the surrounding tooth color. In the past, white 
                              fillings were placed only on front teeth, but recently 
                              a stronger more durable material has been developed 
                              that can withstand the chewing pressure of back 
                              teeth. White fillings are most commonly used for: 
                                Cosmetic reasonsPatients who prefer mercury-free fillingsPatients with sensitivity 
                                  to heat or cold - the composite resin doesn't 
                                  conduct temperature changes as fast as silver 
                                  or gold.  |  
 
                           
                            |  White Porcelain or Resin inlay or onlay: A 
                              porcelain or resin inlay or onlay is used when the 
                              cavity is too big for 
                              a filling, but isn't so big that a crown 
                              is required. An inlay is a filling within the cusp 
                              tips of the tooth. Onlays (also known as overlays) 
                              will overlay one or more cusps in order to protect 
                              and strengthen the tooth. |  
 
                           
                            |  An inlay or onlay may also be made of gold. |  |