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Teeth

Teeth

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...

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Related Experiment Video

Updated: Apr 29, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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Clinical decision making on extensive molar restorations.

T Laegreid, N R Gjerdet, A Johansson

Operative Dentistry

|May 16, 2014

Summary

Dentists increasingly use resin composites for extensive posterior tooth defects. Direct composite is preferred for one missing cusp, while indirect restorations are favored for three or four missing cusps.

Area of Science:

Dentistry
Restorative Dentistry
Dental Materials

Background:

Extensive posterior tooth loss traditionally managed with amalgam or indirect restorations.
Increasing use of resin-based composite restorations for large posterior defects.
Understanding dentists' decision-making processes for these restorations is crucial.

Purpose of the Study:

To survey dentists' clinical decision-making when restoring extensive defects in posterior molar teeth.
To identify factors influencing the choice between direct composite and indirect restorations.
To explore demographic and practice-related influences on restorative choices.

Main Methods:

A questionnaire was distributed to 476 dentists, achieving a 59% response rate.
The questionnaire included background information, clinical cases with treatment options, and general questions.

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Multiple logistic regression analysis was employed to examine associations.

Main Results:

Direct composite restorations were preferred for single-cusp defects.
Indirect restorations were favored for defects involving three or four cusps.
Younger dentists and those in private practice leaned towards indirect techniques.

Conclusions:

The amount of remaining tooth substance is the primary factor influencing restorative decisions.
Demographic factors like age and practice type influence technique selection.
Factors such as oral hygiene, patient requests, and economic considerations were perceived differently by gender.