Advantages and Disadvantages of All on 4 Treatment

At times of the totally edentulous patients, embed bolstered prosthesis

treatment is practically unthinkable without complex methods, for

example, nerve transposition and joining in the maxilla and mandible.

An answer to such circumstances is the All-on-4 idea. This technique

backers tilting distal embeds in edentulous curves which empowers us

in the situation of longer embeds, improved prosthetic help with

shorter cantilever arm, improved entomb embed separation and improved

port in the bone. The "All-on-4 "Treatment idea was created by Paulo Malo

with straight and calculated multi-unit projections, to give edentulous patients

a promptly stacked full-curve reclamation with just four inserts. 

At the point when utilized in the mandible, tilting of back inserts makes it

conceivable to accomplish great bone jetty without meddling with mental

foramina in seriously resorbed maxillae, tilted inserts are an option in contrast

to sinus floor expansion. 

General contemplations

• To accomplish essential embed solidness (35 to 45 Ncm inclusion torque). 
• Demonstrated with a base bone width of 5mm and least bone stature of 10mm from canine to canine in maxilla and 8mm in mandible. 
• In the event that angulation is 30o or more, the tilted inserts can be supported. 
• For tilted back inserts, the distal screw access openings ought to be situated at the occlusal face of the principal molar, the subsequent premolar, or the primary premolar.

Advantages of  the All-on-4 Treatment 

• Calculated back inserts stay away from anatomical structures 
• Calculated back inserts permit longer embeds tied down in the better quality bone 
• Decreases back cantilever 
• Takes out bone unites in the edentulous maxilla and mandible in most of the cases 
• High achievement rates 
• Embeds well-divided, great biomechanics, simpler to clean 
• Quick capacity and feel 
• The last rebuilding can be fixed or removable 
• Diminished expense because of less number of inserts and shirking of joining in most of the cases. 

Confinements 

• Great general wellbeing and adequate oral cleanliness; 
• Adequate bone for 4 inserts of at any rate 10mm long; and 
• Inserts accomplish adequate steadiness for prompt capacity. 

Disadvantages

• Freehand self-assertive careful arrangement of the embed isn't constantly conceivable as embed position is totally prosthetically determined. 
• The length of the cantilever in the prosthesis can't be reached out past the utmost. 
• It is procedure delicate and requires to expand pre-careful planning.