In Single Piece Implants, the abutment portion comes attached to the implant unlike the conventional two / three piece implants. Therefore, these implants provide several advantages which two / three piece implants do not provide.

Here are some of the advantages of using the single piece systems:

  • Quick and simple procedures
  • Immediate loading
  • Less armamentarium
  • Economical
  • Can be used in patients with poor bone quality and quantity
  • Can be used in anatomically unfavorable situations
  • Helps avoid sinus lifts and bone augmentation / grafting procedures
  • Overcomes disadvantages of two piece implants which cannot be used in patients with poor periodontal conditions, smokers and diabetics.

Difference between one piece and two piece Implant

Difference between one piece and two piece Implant

 One piece Implant Two Piece Implant
ConsiderationThe implant and the abutment are fused – they are manufactured as one piece.The implant and the abutment are separate. The abutment is either cemented or cold welded. If the abutment is secured with a screw onto the implant, then it can be considered to be three pieces.
Basic Design Simple. No joint. Single peice.Complex. Two parts joint by screw.
Implant placement procedureSingle sitting surgical procedure and very often flapless (no open surgical procedures are necessary). 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 & Abutment Placement)
LoadingImmediate Loading - ie patient can be given the crown(s) / bridge(s) the very next dayDelayed Loading – very often a waiting period of minimum of 3 months is necessary efore loading the implants with prosthesis
Prosthodontic procedureConventional impressions of the implants can be made just as is the case with conventional bridgework. Less time consuming. Requires more complex procedures and is more time consuming.
Size and DesignA wide range of sizes and designs are available suiting various bone types and measurements. The designs even help avoid bone augmentation and sinus lifts.Limited sizes and designs are available thereby limiting their application.
These work out a lot more cost effective in comparison with two/three piece implants.
Expensive – with respect to the costs of the implants as well as the time taken for multiple procedures
From the patient’s point of viewLess complex placement procedure, less number of sittings and crown(s) & bridges can be cemented in a day or two… more or less like that of a conventional bridgework & costs are comparable with that of conventional bridgework.Crowns / bridges are cemented only after 3 months after the healing phase. Much more expensive than the conventional bridgework..
Screw Loosening
Long term MaintenanceBeing a single piece, the strength provided by the implant is excellent and there is no separate root portion and abutment portion. Maintenance is very simple… maintenance is just the same as that of conventional bridgework.Maintenance of these implants are more complex… very often screws (when used) are to be tightened at periodic intervals as there will be micro-movement between the implant and the abutment.
Table showing the difference between the single piece implants and two piece implant

However, it is to be kept in mind that KOS Single piece implants are not indicated in all cases & they are to be used only in cases where there is good D1 / D2 bone.KOS Implants are approved by the European Union and due to be approved by the US-FDA shortly.