Selection and assembly of posterior teeth
| Size and shape |
In principle, the four posterior teeth of a maxillary hemi-arch must fit between the distal face of the canine (hence the importance of its position) and the anterior edge of the tuberosity. This distance corresponds to the sum of the mesiodistal diameters of the artificial teeth.
The height of the posterior teeth is determined by the space available between the maxillary and mandibular crests. But it is still necessary to ensure harmony of dimension between the canine and the first premolar
Nature of the material: same clinical considerations as for the choice of anterior teeth
Occlusal morphology:
This choice is the sole responsibility of the practitioner and depends on biological, morphological and psychological factors.
- age of the patient;
- condition of the support surfaces;
- morphology of the mandibulotemporal articular surfaces;
- pre-extraction documents;
- patient’s psyche
Rules for mounting posterior teeth (according to GYSI)
| horizontal | frontal | sagittal | |
1st AND 2nd UPPER PREMOLAR: | It is perpendicular to the prosthetic occlusion plane, in bicuspid contact with it. | ||
1st UPPER MOLAR: | Its mesio-distal groove is aligned with the other grooves | its mesiopalatine cusp is in contact with the POP | its occlusal face is inclined and at the top forms an angle of 6° with the POP |
2nd UPPER MOLAR | the occlusal face is in the extension of the occlusal face of the first upper molar | : no cusp should touch the POP but the mesiopalatine cusp is the closest to it | Same inclination |
| 1st LOWER MOLAR | the overhang between the upper and lower first molar is equal to 1 mm | Its mesio-vestibular cusp comes into contact with the mesial slope (the mesio-vestibular cusp of the upper first molar and the distal slope of the vestibular cusp of the upper second premolar | ANGLE CLASS I: 1st M< mesial to the 1st M > ANGLE CLASS III: 1st M< mesial to the 1st M> ANGLE CLASS II: 1st M< distal to the 1st M > |
| 2nd LOWER MOLAR. | It is in contact with the second upper molar | ||
2nd LOWER PREMOLAR | It is located between the vestibular cusps of the two upper premolars. | Its axis is perpendicular to the POP | |
| 1st LOWER PREMOLAR’ | Intercalated between the canine >and the 1st premolar> |
Conclusion :
-Mounting the teeth is not as elementary a step as the simple description of the techniques might suggest.
-For this, the preliminary diagnosis resulting from a thorough clinical examination of the totally edentulous person could lead to the assembly technique depending on the case that arises, taking into account:
-the state of the ridges;
– the intermaxillary relationship;
By meeting aesthetic and functional requirements
Assembly of teeth in total prosthesisAssembly of teeth in total prosthesis
Cracked teeth can be healed with modern techniques.
Gum disease can be prevented with proper brushing.
Dental implants integrate with the bone for a long-lasting solution.
Yellowed teeth can be brightened with professional whitening.
Dental X-rays reveal problems that are invisible to the naked eye.
Sensitive teeth benefit from specific toothpastes.
A diet low in sugar protects against cavities.