Assessing incisor inclination: a non-invasive technique

Area of Science:

• Dentistry
• Orthodontics
• Dental Morphology

Background:

• Accurate assessment of incisor inclination is crucial in orthodontics.
• Traditional methods rely on lateral cephalometric radiography, which involves radiation exposure.
• A non-invasive, reliable method for measuring incisor inclination on dental casts is needed.

Purpose of the Study:

• To introduce and validate the Tooth Inclination Protractor (TIP) for measuring incisor inclination on dental casts.
• To compare TIP measurements with traditional cephalometric assessments.
• To evaluate the reliability and validity of the TIP for clinical application.

Main Methods:

• The Tooth Inclination Protractor (TIP) was utilized to record incisor inclination on dental casts.
• TIP measurements were correlated with inclinations determined from lateral cephalometric radiographs.
• Systematic bias and correlation coefficients were analyzed between the two methods.

Main Results:

• TIP scores demonstrated a close relationship with cephalometrically determined upper incisor to maxillary plane and lower incisor to mandibular plane angles.
• A systematic bias was observed: TIP under-scored maxillary incisor inclination by 10.46 degrees and over-scored mandibular incisor angulation by 2.57 degrees.
• The TIP proved to be a reliable and valid measure for assessing maxillary and mandibular crown inclinations.

Conclusions:

• The Tooth Inclination Protractor (TIP) is a reliable and valid tool for assessing incisor inclination on dental casts.
• The TIP offers a viable, non-radiographic alternative for measuring incisor angulation in orthodontic practice.
• This instrument can effectively track changes in incisor inclination during orthodontic treatment.