Clinical Research Directory

In Vivo Pulp Thermal Changes During Different Slenderization Techniques

The goal of this study is to learn about the temperature rise inside the living part of a tooth (the pulp) during different ways of removing a small amount of enamel (the hard outer layer of the tooth), a procedure called Interproximal Enamel Reduction (IPR). The goal of this study is to learn about the temperature rise inside the living part of a tooth (the pulp) during different ways of removing a small amount of enamel (the hard outer layer of the tooth), a procedure called Interproximal Enamel Reduction (IPR). The main question it aims to answer is: Which IPR technique causes the highest temperature rise in the live tooth pulp? This study is important because, until now, no research has measured these temperature changes in the live pulp of teeth inside a person's mouth (in vivo) that includes both premolars and front teeth (incisors). The original studies only used premolars, and the results might be different for front teeth due to the difference in enamel thickness. Researchers will use 20 premolar teeth and 20 incisors that will be scheduled for extraction as part of orthodontic treatment. The teeth will be divided into two groups based on the IPR method used: Group 1: IPR using a high-speed air-driven drill (airotor) and bur. Group 2: IPR using an orthodontic IPR kit (an oscillating system). Participants will: Receive local anesthesia to numb the tooth. Have the baseline temperature of the pulp recorded using temperature sensor on either side of the teeth. Have the temperature changes in the pulp recorded using temperature sensor while IPR is performed on the sides of the tooth. Have the tooth extracted afterward (as part of original orthodontic plan) The key findings may provide information of the IPR method that cause a temperature rise high enough to harm the pulp. A rise beyond 5.5∘C may cause pulp damage.

The Prognostic Impact of Symptoms and Lesion Depth in Partial Removal of Carious Tissue

The goal of this prospective, observational clinical cohort study is to study the effect of the preoperative condition of the tooth on the outcome of partial removal of carious tissue in mature teeth in adults. The main questions the study aims to answer are: * Do preoperative symptoms affect the outcome? * Does the depth of the carious lesion affect the outcome? One hundred participants will be recruited. Patients who meet the eligibility criteria will be asked to give their informed consent to participate in the study. Partial carious tissue removal will be performed regardless of participation in the study because selective carious tissue removal is the standard treatment of choice for a vital tooth with a deep carious lesion according to the Finnish national treatment guidelines. Participants will be asked to fill in a questionnaire regarding symptoms 7 days post-treatment. The teeth will then be followed up for 12-24 months. The null hypothesis is that there is no difference in the success between i) deep and extremely deep carious lesions and ii) initial and mild pulpitis.