DIFFERENCE BETWEEN SINGLE PIECE IMPLANTS & TWO PIECE IMPLANTS

SINGLE PIECE IMPLANT	TWO PIECE IMPLANT
·         Implant and abutment are fused. They are manufactured as one piece.	·         Implant and abutment are separate. The abutment is either cemented or cold welded. If abutment is secured with a screw onto the implant, then it is considered to be 3 piece.
·         Design is simple, no joints, single piece.	·         Design is complex, 2 parts joint by screw.
·         Single sitting surgical procedure and very often flapless (no open surgical procedure). Implant procedures are less time consuming than that required for bridgework.	·         Very often more complex surgical procedures are necessary, spread over 2 or 3 sittings in a period of 3-6 months. ( Implant placement, healing screw placement and abutment placement.
·         A wide range of sizes and designs are available. Suits various bone types and measurements. The design even help to avoid bone augmentation and sinus lifts.	·         Limited size and designs are available thereby limiting their application.
·         Immediate Loading- ie; patient can be given crowns / bridges the very next day.	·         Delayed loading- very often a waiting period of minimum 3 months is necessary after loading the implant with prosthesis.
·         Much cost effective when compared with 2 or 3 piece implants.	·         Expensive with respective to cost of implants as well as time taken for treatment procedures.
·         From patient point of view, less complex treatment procedure, less number of sittings, crowns / bridges can be cemented on a day or two.	·         From patient point of view, more number of sittings, Crowns/ bridges cemented only after 3 months after healing phase. Expensive.
·         There is no screw loosening since there is no separate abutment-screw-implant assembly.	·         Screw loosening is very common. Being 2 piece, the relation between root portions and abutment can present many problems.
·         Maintenance is very simple. Being 1 piece, strength provided by implant is excellent and there is no separate root portion and abutment portion.	·         Maintenance is more complex. Very often screw has to be tightened at periodic intervals as there will be micro movement between implant and abutment.