A single-visit virtual workflow

The endodontic remedy of critically compromised enamel and their recovery are on a regular basis demanding situations in dental follow. The appearance of high-performance endodontic tools, chairside CAD/CAM applied sciences and comparable fabrics has significantly diminished the rehabilitation time for those enamel, permitting remedy to be carried out in one go to. A same-visit workflow would possibly be offering an invaluable selection to the normal workflow. It introduces a special manner by which the teeth is ready for recovery and the virtual impact is taken prior to endodontic remedy.

After your complete elimination of carious tissue or broken restorations, the clinician prepares the teeth for the oblique recovery and seals the dentine, apart from for the get admission to hollow space. On the finish of this section, a virtual impact is taken, and the recovery is designed and milled from the ensuing knowledge. All over this era, the foundation canal remedy may also be finished, after which the recovery may also be luted, in some instances with out casting off the dental dam.

Fig. 1b: Radiographic view of tooth #46 showing the old composite restoration and the extent of the carious lesion.

Fig. 1b: Radiographic view of teeth #46 appearing the outdated composite recovery and the level of the carious lesion.

The factors for case variety are:

enamel with deep carious lesions and pulpal involvement requiring endodontic remedy;
enamel by which caries has led to the lack of a minimum of one cusp and an oblique recovery is indicated;
enamel requiring endodontic retreatment;
enamel with periapical lesions requiring endodontic remedy or retreatment; and
the affected person’s willingness to go through an extended appointment.

This workflow could also be flawed in instances involving:

a preparation margin that will violate the supracrestal tissue attachment;
acute or persistent periapical abscess;
temporomandibular dysfunction; and
vertical root fracture.

The prospective benefits of this workflow may also be summarised as follows:

rapid dentine sealing prior to the usage of irrigating answers would possibly reinforce progressed adhesive bonding;
contamination of adhesive surfaces by way of endodontic sealer could also be have shyed away from;
the get admission to hollow space may also be higher managed all through shaping and obturation;
the single-visit workflow reduces chair time for the affected person and the clinician; and
in a single-visit workflow, the recovery would possibly beef up the whole seal of the endodontic area.

Endodontic tools designed to reinforce conservative shaping, akin to HyFlex EDM (COLTENE), are really useful for this workflow. The resin composite CAD/CAM block BRILLIANT Crios (COLTENE), used for single-tooth oblique restorations, gives robust mechanical functionality and aesthetics, supporting integration with the encircling tissue. Luting may also be performed with BRILLIANT EverGlow composite in paste or flowable consistency, facilitating extra elimination and polymerisation.

Case 1

A 38-year-old feminine affected person introduced for an emergency appointment owing to ache and heightened sensitivity to warmth and chilly within the mandibular proper quadrant. After medical and radiographic exam, a big carious lesion with pulpal involvement was once identified in teeth #46, which had an outdated composite recovery (Figs. 1a & b). Deficient oral hygiene and acute gingivitis have been additionally noticed. Because the affected person was once because of give beginning in 3 weeks, a single-visit virtual workflow combining endodontic remedy and CAD/CAM recovery was once selected.

Fig. 2: Tooth #46 after removal of the old restoration under dental dam isolation to assess the extent of the carious lesion.

Fig. 2: Enamel #46 after elimination of the outdated recovery beneath dental dam isolation to evaluate the level of the carious lesion.

Fig. 3: Tooth #46 after caries removal, margin elevation and refinement of the cavity preparation for the planned endocrown.

Fig. 3: Enamel #46 after caries elimination, margin elevation and refinement of the hollow space preparation for the deliberate endocrown.

Section 1: Isolation and hollow space preparation
After dental dam isolation of the quadrant, the outdated recovery was once got rid of to guage the level of the carious lesion (Fig. 2). The carious tissue was once then got rid of, deep margin elevation was once carried out, the hollow space preparation was once delicate for the deliberate endocrown and the get admission to hollow space was once ready for the next endodontic remedy (Fig. 3). All of the margins have been obviously visual, and the contour of the long run endocrown was once now not anticipated to be changed by way of the foundation canal remedy procedures.

Fig. 4a: Digital impression workflow: intra-oral scan of the mandibular right quadrant with tooth #46 prepared.

Fig. 4a: Virtual impact workflow: intra-oral scan of the mandibular proper quadrant with teeth #46 ready.

Fig. 4b: Intra-oral scan of the opposing quadrant.

Fig. 4c: Intra-oral scan of buccal scan of the occlusal relationship.

Fig. 4c: Intra-oral scan of buccal scan of the occlusal courting.

Fig. 5a: CAD workflow for tooth #46: definition of the preparation margin.

Fig. 5a: CAD workflow for teeth #46: definition of the preparation margin.

Fig. 5b: Preview of the endocrown design.

Fig. 5c: Positioning of the restoration in the virtual block before milling.

Fig. 5c: Positioning of the recovery within the digital block prior to milling.

Section 2: Affect taking and fabrication of the recovery
On this case, the dental dam was once got rid of to permit the affected person a brief wreck. Typically, then again, it could possibly stay in position all through the virtual impact process.

Fig. 6: BRILLIANT Crios resin composite CAD/CAM blocks in Shade A2 and high translucency.

Fig. 6: BRILLIANT Crios resin composite CAD/CAM blocks in Coloration A2 and excessive translucency.

PTFE tape was once positioned at the ground of the pulp chamber to a peak of about 1.5 mm to simulate the thickness of the flowable composite that will be positioned after final touch of endodontic remedy. As soon as right kind brief blockading out of the canal orifices have been verified, the chairside virtual protocol started with intra-oral scanning the use of CEREC Primescan (Dentsply Sirona). After the teeth to be handled, recovery kind and subject matter have been decided on, intra-oral scans have been taken of the mandibular proper quadrant and opposing quadrant, adopted by way of a buccal scan of the occlusal courting (Figs. 4a–c).

As soon as intra-oral scanning have been finished, the preparation margin of teeth #46 was once outlined within the CEREC device, the endocrown design was once previewed and the recovery was once located within the digital block prior to milling (Figs. 5a–c). BRILLIANT Crios in Coloration A2 and excessive translucency was once decided on for fabrication of the endocrown (Fig. 6), and milling was once begun. On this method, the milling unit was once ready to manufacture the recovery whilst the endodontic remedy was once being carried out. Milling took about 9 mins.

Section 3: Endodontic remedy
Root canal shaping was once performed with the medium HyFlex EDM shaping set (25 mm), and the canals have been irrigated with CanalPro sodium hypochlorite (COLTENE) after each and every step. After final touch of instrumentation, the canals have been dried the use of Larger Taper 0.04 paper issues (COLTENE). ROEKO GuttaFlow bioseal obturation subject matter (COLTENE) was once then implemented, and obturation was once finished by way of vertical heat compaction with HyFlex EDM gutta-percha issues.

Fig. 7a: Endodontic treatment of tooth #46: after obturation.

Fig. 7a: Endodontic remedy of teeth #46: after obturation.

Fig. 7b: Endodontic treatment of tooth #46: application of a layer of flowable composite to the floor of the pulp chamber before luting of the endocrown.

Fig. 7b: Endodontic remedy of teeth #46: software of a layer of flowable composite to the ground of the pulp chamber prior to luting of the endocrown.

Fig. 8a: Milled resin composite endocrown after characterisation and polishing, occlusal surface.

Fig. 8a: Milled resin composite endocrown after characterisation and sprucing, occlusal floor.

Fig. 8b: Milled resin composite endocrown after characterisation and polishing, intaglio surface.

Fig. 8b: Milled resin composite endocrown after characterisation and sprucing, intaglio floor.

Fig. 9a: Sand-blasting of the intaglio surface of the endocrown.

Fig. 9a: Sand-blasting of the intaglio floor of the endocrown.

Fig. 9b: Application of a universal adhesive.

Fig. 9b: Utility of a common adhesive.

Fig. 10a: Etching of the prepared tooth under dental dam isolation.

Fig. 10a: Etching of the ready teeth beneath dental dam isolation.

Fig. 10b: Application of a universal adhesive.

Fig. 10b: Utility of a common adhesive.

Fig. 11a: Endocrown after luting but before removal of excess material.

Fig. 11a: Endocrown after luting however prior to elimination of extra subject matter.

Fig. 11b: Endocrown after finishing and polishing under dental dam isolation.

Fig. 11b: Endocrown after completing and sprucing beneath dental dam isolation.

Fig. 12: Clinical occlusal view of the luted endocrown on tooth #46 after removal of the dental dam.

Fig. 12: Scientific occlusal view of the luted endocrown on teeth #46 after elimination of the dental dam.

Fig. 13a: Clinical follow-up view of tooth #46 after endodontic treatment and restoration.

Fig. 13a: Scientific follow-up view of teeth #46 after endodontic remedy and recovery.

Fig. 13b: Radiographic follow-up view of tooth #46 after endodontic treatment and restoration.

Fig. 13b: Radiographic follow-up view of teeth #46 after endodontic remedy and recovery.

Section 4: Recovery
After endodontic remedy (Fig. 7a), a layer of BRILLIANT EverGlow Float was once implemented to the ground of the pulp chamber (Fig. 7b). A try-in of the recovery was once carried out, and the endocrown was once then completed and polished (Figs. 8a & b).
The recovery was once then sand-blasted and ONE COAT 7 UNIVERSAL adhesive (COLTENE) implemented (Figs. 9a & b). After dental dam isolation of the quadrant, teeth #46 was once etched and ONE COAT 7 UNIVERSAL implemented (Figs. 10a & b).
At this level, the endocrown was once luted the use of heated BRILLIANT EverGlow (Coloration A2/B2). After elimination of extra subject matter, gentle polymerisation was once performed for 90 seconds consistent with floor: occlusal, buccal and lingual. Sprucing was once then carried out the use of the DIATECH ShapeGuard Composite Sprucing Plus Package (COLTENE; Figs. 11a & b). After elimination of the dental dam, a medical take a look at of the endocrown was once carried out (Fig. 12).
The whole remedy time for this single-visit virtual workflow was once 2 hours and 30 mins. Ten days after remedy, the affected person returned for a medical and radiographic evaluation to guage the combination of the recovery with the encircling tissue (Figs. 13a & b).

Case 2

A 62-year-old male affected person introduced for an emergency appointment owing to ache and heightened sensitivity to warmth and chilly within the mandibular left quadrant. After medical and radiographic exam, a big carious lesion with pulpal involvement was once identified in teeth #36, which had an outdated amalgam recovery (Figs. 14a & b). The affected person was once presented single-visit remedy following a virtual workflow, which he permitted.

Fig. 14a: Pre-op clinical view of tooth #36 showing the old amalgam restoration and the extent of the carious lesion.

Fig. 14a: Pre-op medical view of teeth #36 appearing the outdated amalgam recovery and the level of the carious lesion.

Fig. 14b: Pre-op radiographic views of tooth #36 showing the old amalgam restoration and the extent of the carious lesion.

Fig. 14b: Pre-op radiographic perspectives of teeth #36 appearing the outdated amalgam recovery and the level of the carious lesion.

Section 1: Preliminary virtual impact taking
The consultation started with intra-oral scans of the mandibular left quadrant, opposing quadrant and occlusal courting (Figs. 15a–c). Beginning with an intra-oral scan is essential as a result of, after the teeth has been ready and the brand new state of affairs has been captured, the device can recognise and fit the 2 datasets.

Fig. 15a: Initial intra-oral scans of the mandibular left quadrant.

Fig. 15a: Preliminary intra-oral scans of the mandibular left quadrant.

Fig. 15b: Initial intra-oral scans of the mandibular opposing quadrant.

Fig. 15b: Preliminary intra-oral scans of the mandibular opposing quadrant.

Fig. 15c: Initial intra-oral scans of the mandibular occlusal relationship.

Fig. 15c: Preliminary intra-oral scans of the mandibular occlusal courting.

Fig. 16: Isolation of the mandibular left quadrant with a dental dam before removal of the old restoration.

Fig. 16: Isolation of the mandibular left quadrant with a dental dam prior to elimination of the outdated recovery.

Fig. 17: Tooth #36 after removal of the old amalgam restoration, cavity preparation and access cavity creation.

Fig. 17: Enamel #36 after elimination of the outdated amalgam recovery, hollow space preparation and get admission to hollow space introduction.

Fig. 18a: Checking of the pulp chamber depth with a probe.

Fig. 18a: Checking of the pulp chamber intensity with a probe.

Fig. 18b: Checking of the pulp chamber to guide placement of a 1–2 mm layer of PTFE tape to simulate the subsequent flowable composite layer.

Fig. 18b: Checking of the pulp chamber to lead placement of a 1–2 mm layer of PTFE tape to simulate the next flowable composite layer.

Fig. 19a: CAD workflow for tooth #36: matching of the intra-oral scan of the prepared tooth #36 under dental dam isolation with the initial scan.

Fig. 19a: CAD workflow for teeth #36: matching of the intra-oral scan of the ready teeth #36 beneath dental dam isolation with the preliminary scan.

Fig. 19b: CAD workflow for tooth #36: definition of the preparation margin.

Fig. 19b: CAD workflow for teeth #36: definition of the preparation margin.

Fig. 19c: CAD workflow for tooth #36: preview of the endocrown design.

Fig. 19c: CAD workflow for teeth #36: preview of the endocrown design.

Fig. 19d: CAD workflow for tooth #36: positioning of the restoration in the virtual block before milling.

Fig. 19d: CAD workflow for teeth #36: positioning of the recovery within the digital block prior to milling.

Fig. 20a: Endodontic treatment of tooth #36: after obturation.

Fig. 20a: Endodontic remedy of teeth #36: after obturation.

Fig. 20b: Application of a layer of flowable composite to the floor of the pulp chamber before luting of the endocrown.

Fig. 20b: Utility of a layer of flowable composite to the ground of the pulp chamber prior to luting of the endocrown.

Section 2: Isolation and hollow space preparation
After dental dam isolation of the quadrant (Fig. 16), the amalgam recovery was once got rid of, and the mesial margin was once increased. The hollow space preparation was once then finished for the deliberate endocrown, and the get admission to hollow space was once created for endodontic remedy (Fig. 17).
Section 3: Ultimate virtual impact taking and fabrication of the recovery
Ahead of the virtual impact, PTFE tape was once implemented to the ground of the pulp chamber (Figs. 18a & b). As soon as right kind brief blockading out of the canal orifices have been verified, teeth #36 was once digitally got rid of from the preliminary scan, and the ready teeth was once scanned beneath dental dam isolation.
The brand new scan was once then matched to the preliminary one the use of the adjoining enamel as references. The preparation margin of teeth #36 was once then outlined within the CAD device, the endocrown design was once previewed and the recovery was once located within the digital block prior to milling (Figs. 19a–d). The method then endured with milling of the recovery, which took about 11 mins.

Fig. 21a: Milled resin composite endocrown after characterisation and polishing, occlusal.

Fig. 21a: Milled resin composite endocrown after characterisation and sprucing, occlusal.

Fig. 21b: Milled resin composite endocrown after characterisation and polishing intaglio surfaces.

Fig. 21b: Milled resin composite endocrown after characterisation and sprucing intaglio surfaces.

Fig. 22b: Sand-blasting of the intaglio surface of the endocrown.

Fig. 22b: Sand-blasting of the intaglio floor of the endocrown.

Fig. 22b: Application of a universal adhesive.

Fig. 22b: Utility of a common adhesive.

Section 4: Endodontic remedy
Root canal shaping was once performed with the medium HyFlex EDM shaping set (25 mm), and the canals have been irrigated with CanalPro sodium hypochlorite after each and every step. After final touch of instrumentation, the canals have been dried the use of Larger Taper 0.04 paper issues. ROEKO GuttaFlow bioseal was once then implemented, and obturation was once finished by way of vertical heat compaction with HyFlex EDM gutta-percha issues.
Section 5: Endocrown luting process
After endodontic remedy (Fig. 20a), a layer of BRILLIANT EverGlow Float was once implemented to the ground of the pulp chamber (Fig. 20b).The endocrown was once attempted in, completed and polished (Figs. 21a & b). The recovery was once then sand-blasted and ONE COAT 7 UNIVERSAL implemented (Figs. 22a & b). The teeth was once etched and ONE COAT 7 UNIVERSAL implemented (Fig. 23).
At this level, the endocrown was once luted the use of heated BRILLIANT EverGlow (Coloration A2/B2). After elimination of extra subject matter, gentle polymerisation was once performed for 90 seconds consistent with floor: occlusal, buccal and lingual. Sprucing was once then carried out the use of the DIATECH ShapeGuard Composite Sprucing Plus Package (Figs. 24a & b). After elimination of the dental dam, a medical and radiographic take a look at of the endocrown was once carried out (Figs. 25a & b). The whole remedy time for this workflow was once 2 hours and 20 mins.