a 24 Patients above 12 years old with missing upper incisor were divided into two groups, group 1: 12 patient will be treated by resin bonded bridge (RBB) with no preparation protocol, group 2: 12 patient will be treated by resin bonded bridge (RBB) with minimal preparation protocol.

(RBB) retention/survival, patient's speech as well as thermal sensitivity and patient's satisfaction will be evaluated for 12 month at 3,6,9 and 12 month.

Inclusion Criteria:

1. 12-18 years old
2. Full set of permanent teeth.
3. Missing upper incisor
4. Controlled dental disease - no active caries or periodontal diseases
5. Patients will be available to be clinically reviewed up to 1 year

Exclusion Criteria:

1. Patients with uncontrolled active tooth decay or periodontal disease (i.e. 4+ mm probing depth and bleeding on probing).
2. Patients with teeth missing opposite to the planned RBB
3. Abutment tooth mobility of 2 or greater (Millers classification)
4. Patients with debilitating illnesses or complicating medical conditions
5. Heavily restored tooth abutment not suitable for an RBB