الفهرس 
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Abstract
1. Objectives: comparing the effect of conventional presurgical naso-alveolar molding (PNAM) (group I ) and computer aided design computer assisted designed naso-alveolar molding (CAD-NAM) devices for the pre-surgical preparation of unilateral cleft lip and palate and also using a new 3D (three dimensional ) surgical nostril retainer (group II) based on anatomy which facilitate repair of nose during unilateral cleft lip. 2. Design: randomized controlled clinical trials with double blind evaluation as a part of a research work conducted on 40 children. 3. Setting: prosthodontics department, faculty of dentistry Mansoura University and its related hospitals. 4. Patients: all patients were selected with the same criteria of non-syndrome associated unilateral cleft lip reaching nostril cases. 5. Interventions: patients were randomly divided in two equal groups each patient receives NAM device according to each group criteria. 6. Results: Cleft gap was measured pre/post NAM and there were a significant difference between before and after for each group and there was no significant difference between both groups except for anterior cleft gab (A’-X) which was significantly higher in group II. Better symmetry was achieved in cases using the surgical custom nostril retainer but there was no statistically significant difference between both groups. 7. Conclusions: PNAM contributed effectively for reduction of cleft gap and subsequently in lip repair surgery, the use of anatomical nasal retainer is helpful, best fits, cheaper, saves time and facilitates surgical reconstruction with better results.