Posterior tooth

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Posterior Tooth: Insights from Recent Research

Posterior Dahl Concept for Tooth Wear Management

Minimally Invasive Treatment for Posterior Tooth Wear

The Posterior Dahl concept is a minimally invasive method designed to manage localized posterior tooth wear. A retrospective case series involving nine patients demonstrated that this approach effectively increased the vertical dimension immediately post-treatment. The treatment involved creating localized occlusal space and placing supra-occluding direct restorations bilaterally on molars. Follow-up scans showed a tendency towards reestablishment of occlusion in untreated areas, although one patient experienced a persistent vertical open bite. Patient satisfaction was high, with eight out of nine patients reporting being "very satisfied" with the outcomes, and pre-treatment issues such as sensitivity were resolved within six months.

Specifications and Design of Artificial Posterior Teeth

Framework for Evaluating Posterior Tooth Suitability

The design and suitability of artificial posterior teeth can be evaluated using a set of specifications that emphasize the importance of adhering to basic principles over specific designs. This framework allows for considerable flexibility in design while ensuring that future developments remain appropriate and effective.

Morphometric Analysis of Posterior Tooth Root Complex

Digital Analysis of Root Complex Characteristics

A detailed morphometric study analyzed the three-dimensional characteristics of the root complex in posterior teeth. The study included 240 well-preserved permanent posterior teeth, which were digitally scanned to assess features such as root trunk length, surface area, and root concavities. Findings revealed significant variations between maxillary and mandibular posterior teeth, with maxillary first premolars exhibiting a long root trunk that constitutes 65% of the root surface area. These insights are valuable for clinical practice and future research in dental anatomy and digital technology.

Restoration Alternatives for Posterior Teeth

Cost, Longevity, and Aesthetic Considerations

Various restorative techniques are available for posterior teeth, each differing in cost, physical characteristics, and longevity. Commonly used restorations include amalgam, resin-based composites, PFM, cast gold alloy, and all-ceramic restorations. The choice of restoration often depends on the dentist's expertise and the patient's preferences, with a current trend towards aesthetic materials despite their relatively unknown long-term performance .

Occlusal Changes and Interferences Post Tooth Loss

Impact of Posterior Tooth Loss on Occlusion

Posterior tooth loss can lead to positional changes in teeth, altering arch forms and occlusal planes, and resulting in occlusal interferences. A study involving 100 patients with unopposed posterior teeth found that these teeth were more likely to be involved in retruded contact position (RCP) contacts and other interferences compared to controls. Factors such as supraeruption and the presence of adjacent teeth influenced the likelihood of these interferences.

Consequences of Not Replacing Missing Posterior Teeth

Long-Term Effects of Untreated Bounded Edentulous Spaces

A longitudinal study with a median follow-up of 6.9 years examined the consequences of not replacing a missing posterior tooth. Contrary to common assumptions, the majority of patients experienced minimal adverse effects, such as less than 1mm of tooth shifting, extrusion, and alveolar bone loss. These findings suggest that immediate replacement may not be critical for maintaining arch stability, and regular follow-up assessments could be a viable alternative.

Posterior Tooth Size and Dietary Adaptations in Australopithecines

Relationship Between Tooth Size and Diet

Research on South African gracile australopithecines indicated that their large posterior teeth were adapted for a diet requiring heavy mastication, including grains, roots, and scavenged animal protein. This adaptation is significantly greater than that observed in any living hominoid, highlighting the evolutionary significance of posterior tooth size in dietary habits.

Sensitivity Post Orthodontic Debonding

Sensitivity Differences Between Anterior and Posterior Teeth

A study assessing tooth sensitivity post-orthodontic debonding found that anterior teeth exhibited higher sensitivity to thermal stimuli compared to posterior teeth. This sensitivity was most pronounced immediately after debonding but returned to baseline levels within seven days.

Conclusion

The research on posterior teeth spans various aspects, from innovative treatment methods and restorative options to the anatomical and functional implications of tooth loss and sensitivity. These insights are crucial for advancing clinical practices and improving patient outcomes in dental care.