We will be comparing the proximal contacts of zirconia crowns and adjacent natural teeth in two groups. One receiving crowns fabricated via digital intra oral scanning means. And the other group recieving crowns fabricated via the dental impression method using trays and impression material.
Patients seeking definitive full coverage ceramic crowns for molars.
Patients in age group of 18- 47 years.
Patients with healthy adjacent and opposing teeth.
Patients with healthy periodontium.
Patients with grade 1 mobility in adjacent or opposing teeth.
Patients with diastema in posterior teeth.
Patients having severe malocclusion associated with traumatic occlusion.
Patients with temporomandibular joint disorders.
Parallel
Digital intra oral scanning
Procedure/SurgeryOne groups prepared teeth will be scanned by a digital intra oral scanner.
Conventional impression
Procedure/SurgeryOne group will recieve impressions conventionally in a tray with dental impression polyvinly siloxane.
Proximal contact tightness in terms of frictional force generated as shown on digital dynamometre in newtons at cementation day 1.
Proximal contact tightness will be assesed when shimstock will be pulled out by a hook attached to a digital dynamometre. The frictional force generated in newtons will be assesed and noted at the day 1 of cementation.
Proximal contact tightness of zirconia crowns in terms of frictional force in newtons as shown on digital dynamometre at the day 10.
We will assess the proximal contact tightness of zirconia crowns with adjacent teeth as we pull shimstock with a hook attached to digital dynamometre and asses the frictional force generated in Newtons at the day 10 of cementation of crown.
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