Mechanical Stability

Abutment Locking Mechanism

PerioSeal implants also eliminate the frustration of loose prosthetic screws. The literature cites studies with significant numbers of prosthetic screw loosening in conventional dental implants. The PerioSeal collet locking connection rigidly secures the abutment in the implant, thus eliminating micro-motion and subsequent screw loosening. The locking mechanism for attaching abutments to PerioSeal dental implants is unique from other systems. The implant is constructed with a conical opening above an internal hex; the interior of the implant is not threaded. The abutment is held in place by a locking mechanism that expands when a screw inside the abutment is tightened. This patented feature eliminates the possibility of broken or stripped screws preventing the use of an implant. If a problem occurs with a screw in the abutment it can be easily removed and the implant will not be damaged.

The Collet Lock (The Internal Locking Mechanism)

Abutments for crown and bridge, metal impression post and tissue contour abutments have a hex index feature on the apical end of the abutment. This feature is inserted into the internal hex in the implant and expanded by tightening the screw in the abutment using a .050 hex driver. Note: The abutment locking feature is a sliding nut that moves when the screw in the abutment is loosened or tightened. It is important to make sure the screw is not tight (locked position) prior to insertion of the abutment or it will not go into the implant. Should this occur loosen the nut counterclockwise 1-2 turns and reinsert turning the abutment gently to line up the hex. After the seating of the abutment has been verified, either visually or by radiograph, tighten the screw clockwise. Impression post and tissue contour abutments may be tightened with a hand wrench; permanent abutments for crown and bridge should be tightened to 35ncm prior to cementation of the prostheses. Removal is accomplished by loosening screw counterclockwise 1-2 turns with the .050 hex wrench and withdrawing the component.
Note: Do not loosen more than two turns or the nut will come off the abutment screw. In the event the abutment nut remains in the implant, reinsert the abutment and tighten the abutment screw one or two turns and retract the abutment, verify the nut is attached.

Expanding Locking Nut

Healing caps, ball abutments, provisional and cone top abutments use an expanding nut to lock the component into the implant. These parts should be gently inserted into the implant and then loosened two turns; the component should gently push into place; if it will not go in with gentle force loosen the component one more turn and apply gentle force. The component is tightened with the appropriate driver after it is inserted in the implant to 35ncm. Proper seating is verified visually or by radiograph. Remove components by loosening 1-2 turns counterclockwise and retract component from the implant.
Note: These three components (healing caps, ball abutments, provisional abutments) must not have the locking nut expanded or they will not go into the implant. Removal: When removing the components from the implant, do not turn the component more than two turns to prevent leaving the nut in the implant; if the nut is left in the implant reinsert the component and tighten two turns then remove and verify the nut is attached to the component.With other implant systems, placing an abutment on an implant in the oral cavity can be a tedious and time-consuming task. Starting the screw without dropping it or having the patient aspirate it are typical problems with other conventional implant systems. With PerioSeal™ Implants, the abutment locking mechanisms are pre-assembled units. When the abutments are inserted into the implant, clockwise turns are required to lock the abutment into place. Removal is just as easy: 1-2 turns counterclockwise for the release and removal of the abutments.

Index Abutment

The interior of each PerioSeal™ Implant has six precision index features that allow repeatable placement in sixty-degree increments. The index corresponds to the locking nut on the abutment, and the hex feature prevents the rotation of the sbutments.

Hygienically Sealed

The Implant Abutment Junction (IAJ) of the PerioSeal Implant System is hygienically closed. The prosthetic margin of the crown is placed apical to the IAJ; thus, the IAJ is captured within the cemented crown eliminating the possibility of harboring bacteria within the IAJ. There is a relationship between bone loss and the location of the IAJ in non-sealing implant systems. Callan, O’Mahoney, and Cobb demonstrated in an eight-year study of 350 implants that when the IAJ was sub-gingival, bone loss occurred in 100% of the cases; however, when the IAJ was supra-gingival, bone loss only occurred in 14.9% of the cases. When the IAJ is located subgingivally, this non-cleansable area may act as a “cracked root syndrome” and result in bone loss and loss of the implant. By capturing and sealing the IAJ within the crown, PerioSeal Implants eliminate a potential haven for organisms adjacent to healthy bone and soft tissue.