010 – Impact of Molar Extraction to the Existing Dentition

What will you do if you are having a toothache from a caries molar? Do you prefer to save it regardless the cost and method, or just want to take the simple way out by extract it?


Most people taught that it is located at the back, doesn’t affect their smile, so they feel “harmless” to just extract it! Some might weight it at the bottom of their priority and not willing to spend money to preserve the tooth. Before you make any decision, let me show you what are the consequences that might happened after extraction of molar.

1.Alveolar bone loss (Atrophy)

Bone will undergo remodeling after extraction, the alveolar bone will be resorbed and reduced in height (photo above) and in width (photo below).

2. Impact to the adjacent teeth.

All the adjacent teeth will suffered some degree of movement, common are shifting and tilting toward the extracted site (#1, yellow arrow), rotation of tooth during shifting (#2, blue arrow) and spacing of teeth (#3, red arrow)

3. Over eruption of opposing tooth.

Passive eruption of opposing tooth (above) till impinge on the gum of extracted site (below), caused further resorption of alveolar bone and interference of chewing process.

 4.Asymmetric of face

 Extraction of posterior tooth (molars) will affect the chewing process. People avoid to chew on missing tooth side and tends to chew on one side, this may leads to hypertrophy of the masticatory muscle of one chewing side over some time.

5. Protrusion of upper teeth

Imaging our temporal-mandibular joint is a hinge joint, and the molar act as a stopper to keep the proper vertical dimension of the face. When we lost most of the posterior teeth (molars), that means there will be no stopper for the hinge joint at posterior region. The force of the chewing muscles will load on the upper anterior teeth and caused them become more and more protruding.

Prepared by,
Dr Goon Yong Por
Dental Surgeon
BDS, FICD, FADI, FICCDE