## 2 Materials and Methods
### Target Questions  
The questions processed the following guidelines, according to PICO (Patient, Intervention, Comparison, Outcome):  
* How to obtain a functional and aesthetic mobile prosthesis? * How to choose the correct vertical dimension for the patient and the correct occlusal plane of the prosthesis?To explain the method to plan the prosthetic design and understand the results, it is necessary to analyze and explain the anatomical points and reference planes used. Soft Tissue references used in the search for the vertical dimension using the golden proportions of the face included:  
1. Trichion (tri): is the point on the hairline in the midline of the forehead. 2. Lateral cann thus of the eyes (lc): is the point at the outer commissure of the eye fissure. 3. Ala of the nose (al): the most lateral point on alar contour. 4. Pronasalis (prn): the most anterior point of the tip of the nose. 5. Stomion (st): the contact point of the upper and lower lips in the mid-sagittal line when the mouth is closed. 6. Propogonion (ppo): the most anterior point of the chin profile. 7. Menton (m): the lowest point in the midline on the lower border of the chin. The cranial, maxillary and mandibular references to determine the prosthetic occlusal plane using the latero-lateral X-ray are:  
1. Basion (Ba): located at the anterior border of the foramen magnun. 2. Nasion (N): selected at the frontal margin of the fronto-nasal suture. 3. Porion (P): selected at the center of the superior border of the ear canal. 4. Orbitale (O): located at the lower rim of the orbit. 5. Pterygoid point (Pt): selected at the lower border of the Foramen Rotundum at the origin of Pterygoid buttress. 6. Center cranium (Cc): is the intersection between Frankfort Plane and Basin-Nasion Plane. Maximly reference:
1. Anterior Nasal Spine (ANS): is selected on the most forward point of maxilla bones. 2. Point A (A): selected at the deepest curvature of the contour below the anterior nasal spine. Mandibular reference:
1. Pogonion (Po): defined as the most anterior point on the outline of the chin. 2. Protuberance menti (Pm): selected where the symphyseal cortical plate ends and where the supramental contour starts to recede into the alveolar process. 3. Gnathion (Gn): selected cephalometrically and constructed by the intersection of the Facial Plane with the Mandibular Plane. 4. Menton (M): is the lowest point on the inferior border of the symphysis. 5. Xi: is selected as a centroid reference for the ramus. 6. Subgionion (Sgo): is selected at the lower border of the angle of the mandible. Teeth:
1. Upper incisor (A1): representative position of the mean of the upper central incisors traced with the Ricketts template. 2. Lower incisor (B1): representative position of the mean of the lower central incisors traced with the Ricketts template. 3. Lower incisor divine point (\(\Phi\)): selected in golden proportion between point A and Pm. The height from incisal edge to Pm should be 0.618. 4. Upper first molar (A6): selected as the bisection of the two sides. Traced with the Ricketts template. 5. Lower first molar (B6): selected as the mesial margin of the lower first molar for anterior reference and vertically as the bisection of the two sides and of the first molar occlusion. Traced with the Ricketts template. 6. Lower second molar (B7): selected as the mesial margin of the lower second molar for anterior reference and vertically as the bisection of the two sides and of the second molar occlusion. Traced with the Ricketts template. Reference employed in frontal perspective to determine the prosthetic occlusal plane:  
1. Zygomatic arch point (Za): Zygomatic arch center. B6L: lower left first molar  
3. B6R: lower right first molar  
Lateral cranial planes:  
1. Basion-Nasion plane: Ba-N  
2. Frankfort Plane: P-O  
3. True Buccal Occlusal Plane (TBOP): line through the bisection of the buccal cusp of premolars and first molar. 4. Divine Occlusal Plane (DOP): traced from Xi to Lower Incisor Divine point (\(\Phi\)). Planes and lines for the Face:  
1.