Functional harmony between the sagittal condylar path inclination and the anterior guidance inclination

Abstract

The determinants of the morphology of the mandibular tubercle of the Temporomandibular Joint (TMJ) have been the subject of numerous investigations but remain poorly understood.It has been hypothesized that the lingual surfaces of the maxillary anterior teeth could influence the growth, the development, and the shape of the mandibular tubercle.Nonetheless, there is disagreement concerning the existence of a functional relationship between the condylar path and the anterior guidance of the mandible.The objective of the study was to find a correlation between the mean Functional Incisal Path (FIP) of the maxillary anterior teeth and the Functional Condylar Path (FCP).Materials and methods: Subjects included in the study consisted of randomly selected dental students (n ¼ 50).For each student, the following was performed:-The tracing of multiple cuts of silicone of maxillary anterior block which were analyzed by an odontometry software program. -A mechanical axiography to register the protrusive path bilaterally.Results: A statistically significant correlation (r ¼ 0.8; p ¼ 0.0000; FCP ¼ PIF Ã 0.661 þ 9.799) between anterior guidance on the incisors (FIP mean value ¼ 56.96 AE 7.86) and sagittal condylar path inclination (FCP mean value ¼ 47.46 AE 6.56) was found during the protruding movement.Conclusion: The clinical application is interesting in the areas of both anterior restorative reconstruction and orthodontic treatment, classically by increasing by 10 the anterior guidance in relation to the condylar path or more precisely by using a regression formula.

Articular Eminence Inclination in Medieval and Contemporary Croatian Population

“…AEI values smaller than 30˚ have been characterized as fl at, while those greater than 60˚ have been characterized as steep 15 . Th e results of various studies correspond to this range and are similar to the values recorded in our study 21,[23][24][25][26][27] . In both the medieval and recent sample groups, diff erences were found between the right and left joints.…”

“…Gilboa et al report that the AEI values usually vary from 21 to 64 degrees 21 . Koyoumdjisky 23 measured the inclination of the anterior wall of the fossa and obtained a mean value of 47.6˚, while Zoghby et al 24 found a mean value of 47.46˚ using the method of mechanical axiography in study participants. It has been reported that the normal value of AEI in adults is from 30˚ to 60˚.…”

The relation between incisal guidance angle and the growth and development of temporomandibular joint: a multi-cross-sectional retrospective study

“…Many scholars have reported that IG influences condylar guidance, which in turn modifies TMJ morphology [5,8]. Different condylar and incisal guidance ratios have been found to affect the activity of anterior and posterior temporal muscles [9].…”

Age-related variations in position and morphology of the temporomandibular joint in individuals with anterior openbite and crossbite: a multi-cross-sectional comparative study

“…Incisal guidance is among the occlusal factors and is essential for a harmonious and functional occlusion that can stabilise mandibular movement, reduce applied forces, and protect anatomical structures. Many researchers have emphasised that the incisal path must be coordinated with the condylar path and proposed that incisal guidance affects condylar guidance, which in turn influences condyle position and morphology [ 4 , 5 ]. Interestingly, we previously reported that the relationships between the condyle and fossa are diverse in individuals with different incisor guiding angles, and incisal guidance is related to the growth and development of the TMJ [ 6 ].…”