 Hello everyone, welcome back to another session in dentistry and more. So today's topic in prosodontics is Christian sense phenomenon So it is nothing but a gap occurring in natural rendition or between the opposite thing posterior flat occlusal rims When the mandible is protruded. So that is a creation of posterior open bite When a person bites The anterior teeth or the Anterior teeth comes in edge-to-edge contact. So there will be a creation of posterior open bite Okay, so it can lead to instability in full dentures. So that is a problem when we are creating a denture This will be a problem. This will create instability This will remove or it get dislodged from the posterior region because it will give the Rotating force on the posterior aspect of the denture. So we need to apply compensatory curves compensatory curves on the teeth arrangement in order to Solve this problem of posterior open bite or Christian sense phenomenon So in case of denture, we need to have the simultaneous anterior and posterior contacts When the mandible is protruded, so it should not be there in denture So we need to have simultaneous anterior and posterior contact when the patient Brings the mandible to test the or brings the lower denture to test the maxillary Central incisors or the front teeth. So we need to have a simultaneous contact for the anterior and posterior in order to solve this problem, okay and This gap this gap is always proportional to the contiler angle Okay, so it is proportional to the contiler angle so We need to use a wax wafer To record it may record it then it can be subsequently be used to set the contiler angle on the adjusted articulator So this contiler angle should be recorded using a wax wafer and It should be adjusted on the articulator So we get a simultaneous contact on the anterior and posterior teeth when the mandible is coming forward So Christensen's phenomena as it can this is on the lateral side When the patient when we are viewing it from the lateral side. So the problem is Also there which is known as transverse Christensen's Christensen's phenomena, okay, and when we have a well-adapted occlusion rims and the patient produces a lateral movement so lateral excursion and Creation of a v-shaped gap between the rims and the molar region of the balancing side So this is a working side. This is a non-working side or balancing side. So working side is no problem but when he moves the Ringer on lateral excursion, so there will be creation of v-shaped Space and the molar region of balancing side. So that is known as transverse Christensen phenomena So this can be the sagittal Phenomena and this is the transverse phenomena. Okay, so sagittal phenomena when the anterior teeth are in contact There will be a v-shaped space creating at the posterior molar region That is a posterior open bite and the transverse phenomena is when the patient is doing the lateral movements The teeth are the occlusion rims are perfectly contacting at the working side But creating a v-shaped space at the non-working side or balancing side. So these two are the Christensen's phenomena It needs to be corrected using the compensatory curves So I'll come up with a new topic in prosthodontics. Thank you