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Case Reports

Seating A Crown on Tooth #10

Daniel S. Kim, DDS demonstrates seating a crown using the ContacEZ Restorative Strip System.

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Fig. 1) The temporary crown was removed from the tooth #10 prep.

Fig. 2) The e.max crown was placed onto Tooth #7.

Fig. 3) With the abrasive side facing the crown, the ContacEZ Black Diamond Strip was inserted in the mesial and distal and passed buccolingually a few times to determine the side with heavier proximal contact. The side where greater pressure is felt against the strip is where the proximal contact is heavier.

Fig. 4) Heavier contact was detected on the distal side, and so the Black Diamond Strip was passed 5-6 more times through the distal interproximal space. This process (Fig. 3 & 4) is then repeated on the mesial and distal interproximal spaces until equal light resistance on the Strip is felt on both sides. Note that the central opening of the Strip allows for easy access with cotton pliers to securely hold the crown in place. When this light resistance is achieved, the ideal proximal contact adjustment of the crown is complete and ready for cementation.

Fig. 5) The x-ray shows superb marginal fitting.

Fig. 6) The crown was cemented firmly into place, and the dual cure resin cement was light cured.

Fig. 7) Excess resin cement is removed from around the crown with an explorer, but harder to reach cement remains in the interproximal spaces.

Fig. 8) The ultra-thin White Serrated Strip, is passed through both mesial and distal interproximal spaces to cut and clean out the trapped resin cement without opening the contact.

Fig. 9) The Gray Final Polishing Strip is then used, both to confirm Interproximal Relief and to polish the surface of the crown to a natural finish.

Fig. 10) Dental floss was snapped into and out of the contacts with firm resistance, confirming the ideal proximal contacts. Note that the ContacEZ Gray Strip, which is thinner than some floss, passed through the interproximal space with light resistance.

Fig. 11) Occlusion was checked using articulating paper and required minimal or no adjustment. The patient said that the crown felt natural and that there was no discomfort or pressure.

Fig. 12) The x-ray shows the complete marginal seating of the crown after cementation. Using the ContacEZ Restorative Strip System easily produces complete marginal seating with every crown.

An Innovative and Simplified Crown Seating on Tooth #8

Daniel S. Kim, DDS explains the process of seating a crown using the ContacEZ Restorative Strip System.

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Figure 1

Fig. 1) A ceramic crown was placed on Tooth #8 and pressed up to the prepared margin. There was resistance to seating the crown against the prepared margin.










Figure 2

Figure 3

Fig. 2) To find the side of the heavier proximal contact among mesial and distal, ContacEZ Diamond Dental Strip, the ideal proximal contact solution (Black) was inserted into the mesial and distal interproximal spaces facing the abrasive side to the crown and passed buccolingually a few times. The side with more pressure against the strip is the side of heavier proximal contact and needed more relief.

Fig. 3) More pressure was detected in the mesial than the distal interproximal space and ContacEZ Diamond Dental Strip was passed buccolingually a few more times (or 5-6 times) through the mesial interproximal space. This procedure was repeated in the mesial and distal interproximal space until there was light resistance in both of the interproximal spaces. When light resistance in both the mesial and distal interproximal spaces was equal, the ideal proximal contact adjustment of the crown on Tooth #8 was completed.

Figure 4

Fig. 4) The crown was cemented and the resin cement was light cured.











Figure 5

Figure 6

Fig. 5) The excess resin cement around the crown was removed with an explorer. ContacEZ Serrated Dental Strip, the interproximal space cleaner (White), was passed through to cut and clean out the remaining resin cement in the distal and mesial interproximal spaces.











Figure 7

Figure 8

Fig. 6) Using ContacEZ Final Polishing Strip, the final proximal surface polisher (Gray), the mesial and distal proximal surfaces were polished.

Fig. 7) The ideal proximal contacts are confirmed using dental floss. The dental floss was passed through the interproximal contacts with heavy resistance - snapping in and out. The crown seating of Tooth #8 was completed.

Proximal Contact Adjustment on Tooth #29

Use of ContacEZ Diamond Dental Strip restores interproximal relief* by eliminating excessive pressure between the restoration and the adjacent teeth, and complete marginal seating is achieved simply and easily.

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It is extremely important to tell your dental lab to retain the natural contour and space between the adjacent teeth. The models should not be scraped. If scraping is desired, it should not exceed 0.10mm in thickness.

Fig. 1) The crown was placed on the preparation and seated with finger pressure. The margin of the crown fit to the preparation perfectly, but there was pressure in the interproximal spaces because of overly tight proximal contact.

Fig. 2) The crown was lifted from the prepared tooth and rested passively between the adjacent teeth. There was a marginal opening due to overly tight contacts and it was found that the mesial margin had less opening, which indicated that there was more pressure in the mesial interproximal space.

The side with the edge of the crown margin closer to the prepared tooth surface is the side with the heavier proximal contact. When a crown has a very heavy proximal contact, a rotary instrument is recommended for gross adjustment.

Fig. 3) The crown was slightly lifted and a ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space that had the heavier contact. The crown was gently finger pressed. The ContacEZ Diamond Dental Strip was passed with the abrasive surface facing the crown, buccolingually 6 times. The crown seated with each pass of the ContacEZ Diamond Dental Strip.

The orientation of the diamond particles on the metal strip may initially limit the movement of the strip to one direction. The crown was visible through the opening of the ContacEZ Diamond Dental Strip. This opening allowed easy access for an additional instrument to press down the loose crown while the ContacEZ Diamond Dental Strip was passed buccolingually.

Fig. 4) Then the ContacEZ Diamond Dental Strip was moved to the distal part of the crown and inserted into the interproximal space. The ContacEZ Diamond Dental Strip was passed twice buccolingually. Because there was light resistance to the distal, it was not necessary to pass the strip more than twice.

Fig. 5) Again, the ContacEZ Diamond Dental Strip was moved to the mesial of the crown and inserted into the interproximal space. It was passed 5-6 times with light resistance to ContacEZ Diamond Dental Strip. The crown was seated completely to the margin of the preparation. The side with the most resistance to ContacEZ Diamond Dental Strip was the heavier contact side and may require more passes of the strip.

Fig. 6) A ContacEZ Diamond Dental Strip was then inserted into the distal interproximal space of the crown and was stripped twice to check for light resistance.

The ContacEZ Diamond Dental Strip is flexible and accommodates the curvature of contact surfaces of adjacent teeth. The author's observation is that most of the contact surfaces are curved, not flat.

Fig. 7) The ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space for the third time and passed twice to check for light resistance.

Fig. 8) The crown was cemented by firmly pressing down.

Fig. 9) After removal of excess cement, interproximal relief was confirmed by passing ContacEZ Diamond Dental Strip through the interproximal space on both mesial and distal of the crown.

Fig. 10) Dental floss was used to confirm the firm proximal contacts of the crown.

When the Interproximal Relief is achieved, dental floss passes through with firm resistance.

Fig. 11) The occlusion was evaluated and adjusted. There was no extrusion of the adjacent teeth.

Fig. 12) Crown cementation was finished.

Fig. 13) The occlusion of the quadrant of the crown was perfect. The patient said that she did not feel any pressure or changes in her mouth.

Using ContacEZ Final Polishing Strip, the final proximal surface polisher (Gray), the mesial and distal proximal surfaces were polished.

*"A Proximal Contact Adjustment and Interproximal Relief Method"
The Journal of Prosthetic Dentistry, Vol.97, No.4, Page 244-245, April 2007, Daniel S Kim DDS FAGD and Kyu Won Suh DDS MSD DSO

A Simple Crown Seating Method for Anterior Teeth

Daniel S. Kim, DDS completes a crown seating on teeth #8 and #9 using the ContacEZ Black Diamond Strip.

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ContacEZ Diamond Dental Strip is an innovative new precision dental device designed to use prior to final cementation to achieve proper proximal contact adjustment of direct or indirect restorations. Use of ContacEZ Diamond Dental Strip restores Interproximal Relief by eliminating excessive pressure between the restoration and the adjacent teeth, and complete marginal seating is achieved simply and easily!

Fig. 1) Prepared abutment teeth #'s 8 and 9.

Fig. 2) The crown for tooth #8 was placed on prepared tooth #8. A ContacEZ Diamond Dental Strip was inserted into the distal interproximal space of tooth #8 with the abrasive side facing the crown. The ContacEZ Diamond Dental Strip was passed through faciolingually several times between proximal contacts until light resistance was achieved.

Fig. 3) Crown #8 was removed from prepared tooth #8 and crown #9 was placed on prepared tooth #9. The ContacEZ Diamond Dental Strip was inserted into the distal interproximal space of tooth #9 with the abrasive side facing the crown. The ContacEZ Diamond Dental Strip was passed through faciolingually several times between the proximal contacts until light resistance was achieved.

Fig. 4) With the crown #9 still in place, crown #8 was placed on the prepared tooth #8. The ContacEZ Diamond Dental Strip was inserted between crowns #8 & 9 with the abrasive side towards crown #9 and passed through faciolingually 3 to 4 times.

Fig. 5) ContacEZ Diamond Dental Strip was removed from the interproximal space between crowns #8 and 9, and flipped over so that the abrasive side towards crown #8. The ContacEZ Diamond Dental Strip was again inserted into the interproximal space. The ContacEZ Diamond Dental Strip was passed through between proximal contacts faciolingually 3 to 4 times.

Fig. 6) The ContacEZ Diamond Dental Strip was inserted into the distal interproximal space of crown #8. With the abrasive side facing the crown, the ContacEZ Diamond Dental Strip was passed through faciolingually 2 to 3 times.

Fig. 7) ContacEZ Diamond Dental Strip was inserted into the distal interproximal space of crown #9 with the abrasive surface towards crown and passed through faciolingually 2 to 3 times. Procedures 4 to 7 were repeated until the ContacEZ Diamond Dental Strip was passed through with light resistance.

Fig. 8) The crowns were cemented on prepared teeth #'s 8 and 9.

Fig. 9) After excess cement was thoroughly removed, the ContacEZ Diamond Dental Strip was inserted into the mesial and distal interproximal spaces of teeth #8 and 9, and Interproximal Relief was confirmed.

Fig. 10) The crown cementation was completed.

A Cerec Inlay Seating Method Using the ContacEZ Diamond Dental Strip

The ContacEZ Diamond Dental Strip confirms interproximal relief and leaves the inlay on tooth #18 smooth and naturally contoured.

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ContacEZ Diamond Dental Strip is an innovative new precision dental device designed to use prior to final cementation to achieve proper proximal contact adjustment of direct or indirect restorations. Use of ContacEZ Diamond Dental Strip restores Interproximal Relief by eliminating excessive pressure between the restoration and the adjacent teeth, and complete marginal seating is achieved simply and easily!

Fig. 1) Tooth #18 was prepared for MO inlay. The primer was applied in the preparation and light cured.

Fig. 2) A piece of gingival retraction cord was prepared for the subgingival margin of the preparation.

Fig. 3) The retraction cord was inserted into the sulcus of the mesial interproximal space of tooth #18 to expose the gingival margin of the preparation.

Fig. 4) An inlay body was milled in the CEREC machine, and the sprue and its elevated surroundings were removed thoroughly.

Fig. 5) The inlay body was placed in the preparation. It was found that the inlay was incompletely seated due to excessively heavy proximal contact. Note the opening of the gingival margin in the mesial proximal embrasure of tooth #18.

Fig. 6) The inlay body was lifted slightly from the preparation.

Fig. 7) A ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space of tooth #18 with the abrasive surface towards the inlay, The inlay was placed back onto the preparation.

Fig. 8) The ContacEZ Diamond Dental Strip was passed through buccolinually 23 times while the inlay body was gently pressed, until light resistance was achieved. At first, the strip moved in one direction only due to excessively heavy proximal contact. Therefore, the ContacEZ Diamond Dental Strip was passed approximately the first 10 times in one direction only by making a circular motion and was gradually able to pass in both directions buccolingualy.

Fig. 9) A matrix band was installed with a wedge and the inlay body was cemented with light cure resin cement.

Fig. 10) After light curing on the occlusal surface, the matrix band was removed, and the interproximal space was light cured.

Fig. 11) The excess cement was removed and the occlusion was adjusted.

Fig. 12) Using a finishing point, the margins of the restoration were smoothed to conform evenly to the enamel surface of the tooth.

Fig. 13) The Interproximal Relief was confirmed by using the ContacEZ Diamond Dental Strip.

Fig. 14) The mesio-buccal and the mesio-lingual proximal contours of tooth #18 were smoothed using the ContacEZ Diamond Dental Strip.

Fig. 15) Tooth #18 was polished.

Fig. 16) The retraction cord was removed.

Fig. 17) The interproximal space was cleaned using dental floss.

Fig. 18) The MO inlay restoration on tooth #18 was finished. Note the smooth and even transition of the proximal contour between the restoration and the enamel surface.

Perfect Proximal Contact for Crowns Supported by Implants

Perfect proximal contact is achieved using the ContacEZ Diamond Dental Strip.

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ContacEZ Diamond Dental Strip is an innovative, new dental device designed to use prior to final cementation to achieve proper proximal contact adjustment of direct or indirect restorations. Use of ContacEZ Diamond Dental Strip restores interproximal relief* by eliminating excessive pressure between the restoration and the adjacent teeth, and complete marginal seating is achieved simply and easily.

Fig. 1) It is extremely important to instruct your dental lab to retain the natural contour and space between the adjacent teeth. The models should not be scraped. If scraping is required, it should not exceed 0.10 mm in thickness.

Fig. 2) Tooth #31 was cleaned and Teeth #29, 30, and 31 were ready for definitive cementation.

Fig. 3) Crown #31 was placed on the prepared abutment tooth and seated with finger pressure. The margin of the crown fits to the preparation and occlusion was evaluated.

Fig. 4) Crown #31 was cemented with firm finger pressure.

Fig. 5) The cement was removed from Tooth #31 and occlusion was evaluated with articulating film.

Fig. 6) The occlusion was adjusted.

Fig. 7) The abutments were screwed into the implants.

Fig. 8) Crown #30 was placed on the abutment supported by the implant and ContacEZ Diamond Dental Strip was inserted into the distal interproximal space. With the abrasive surface facing crown #30, the strip was passed buccolingually 14 times until the strip passed with light resistance. (Interproximal Relief was achieved.)

Fig. 9) Crown #30 was removed from the abutment and Crown #29 was placed on the abutment supported by the implant. ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space of Tooth #29 with the abrasive surface facing the crown. The ContacEZ Diamond Dental Strip was passed approximately 18 times until it passed with light resistance. (Interproximal Relief was achieved)

Fig. 10) Crown #30 was placed on the abutment and ContacEZ Diamond Dental Strip was inserted between Crowns #29 and 30 and passed buccolingually 16 times with the abrasive side facing the crown until the ContacEZ Diamond Dental Strip passed with light resistance. The abrasive surface faced Crowns #29 and 30 alternately.

Fig. 11) ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space of Tooth #29 confirming interproximal relief.

Fig. 12) ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space of Tooth #30 confirming interproximal relief.

Fig. 13) ContacEZ Diamond Dental Strip was inserted into the mesial interproximal space of Tooth #31 confirming interproximal relief.

Fig. 14) Crowns #29 and 30 were cemented with firm finger pressure.

Fig. 15) ContacEZ Serrated Dental Strip was used to cut and clean out hardened cement in the interproximal spaces.

Fig. 16) After the cement was removed, the occlusion was evaluated and adjusted.

Fig. 17) Cementation of Crowns #29, 30, and 31 was completed and the patient confirmed immediate comfort and functionality.