Comparison of Marginal Fit and Internal Adaptation in All-Metal Crowns: an in Vitro Experimental Trial

Altamash Institute of Dental Medicine28 enrolled

Overview

The goal of this in vitro study is to compare the marginal fit and internal adaptation of all-metal crowns in polished crown preparations and non-polished crown preparations The main question it aims to answer is: are the non polished tooth preparations comparable to polished preparations? We will compare polish and non polish groups and see their effects on marginal fit and internal adaptation of all metal crown

Study Type

OBSERVATIONAL

Enrollment

Conditions

Evaluation of Marginal and Internal Fit of Metal Crowns

Interventions

microleakageOTHER

prevention of microleakage and secondary carries

Eligibility

Sex: ALLHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: 1. Phantom teeth 2. Maxillary molars 3. Metal crowns with conventional lost-wax technique for crown fabrication Exclusion Criteria: 1. Over prepared or underprepared crowns 2. Defective metal crowns 3. Ruptured silicone films upon removal 4. Defective die stone casts

Outcomes

Primary Outcomes

marginal fit

The margins of fixed restorations refers to the junction between the prepared tooth structure and the crown restoration

Time frame: six months

Secondary Outcomes

Internal fit

Internal fit is defined as the perpendicular distance between the framework and abutment teeth and the misfit is measured from occlusal/incisal and axial surfaces to the coping