Patients often present to our practices with limited information about tooth replacement, most of which is gleaned from situations evaluated on the internet. In these moments, practitioners are provided with the opportunity to communicate options for treatment and discuss prognoses and long-term viability. Being able to visualize a final result prior to any surgical intervention is an advantage promoted by the use of modern diagnostic tools, such as cone-beam computed tomography (CBCT) analysis. By explaining what is possible to patients, they are enabled to become an integral part of the decision-making process.
Implant dentistry has become mainstream. Confidence and competence in communication and clinical training in anatomy, diagnosis, treatment planning, and the nuances of the surgical and prosthetic applications is essential to truly provide patients with an excellent service that restores function and esthetics. Each of these components is equally important when incorporating implant dentistry into a practice.
The concepts of smile design and emergence profile development are taken seriously in today's clinical settings. Because patients' expectations are high, achieving acceptance and success takes careful planning and a clear understanding of all of the processes. A prosthetically driven approach to planning is best when determining the ideal positioning of any implant. Designing the tooth replacement first results in better surgical placement and minimizes prosthetic complications.
In this case, the patient presented with a symptomatic mandibular left first molar (tooth No. 19) that had previously undergone endodontic treatment and restoration. Following an endodontic consultation, the tooth was deemed non-restorable, and the patient was informed that it would need to be removed. Options for treatment were presented, which included leaving the space edentulous, fabricating a single tooth removable appliance, preparing the site for a three-unit conventional fixed bridge, or delivering a single tooth implant-supported restoration. A good-better-best approach was used during the treatment presentation, with implant placement certainly being considered the best option. The replacement of missing teeth is always preferred to leaving a space in order to improve function and prevent other complications. After a discussion, the patient elected to have an implant placed.
The extraction of endodontically treated teeth with divergent roots can be challenging. Maintaining the facial plate minimizes bone loss and simplifies the grafting procedures of socket sites. In this case, after the tooth was extracted and the socket was grafted, bone turnover occurred in a short amount of time, providing the opportunity to ideally place the implant in both the mesial-distal and buccal-lingual dimensions. This is imperative for the development of a proper emergence profile. Because grafting is a critical component of dental implant therapy, being able to predictably grow bone should be within the implant dentist's wheelhouse.
It is essential to explain the use of modern dental techniques and technologies to individuals who present to our practices. These patients rely on our experience and professional judgement. Meeting perceived expectations is not always easy, but the more patients understand about what can and cannot be achieved, the more satisfied they will be with their end results.
About the Authors
Timothy Kosinski, DDS
Master
Academy of General Dentistry
Diplomate
International Congress of Oral Implantologists
Affiliated Adjunct Clinical Professor
University of Detroit Mercy
School of Dentistry
Detroit, Michigan
Private Practice
Bingham Farms, Michigan
Stephanie Tilley, DMD
Fellow
International College of Dentists
Fellow
International Congress of Oral Implantologists
Private Practice
Pensacola, Florida
Fig. 1
Pretreatment radiograph of symptomatic tooth No. 19, which had previously undergone endodontic treatment but was now failing and deemed non-restorable.
Fig. 2
Pretreatment buccal and occlusal views of the tooth No. 19 crown.
Fig. 3
Pretreatment buccal and occlusal views of the tooth No. 19 crown.
Fig. 4
An elliptical window was created in the facial aspect of the old crown in the coronal third to the central groove area.
Fig. 5
A crown separating tool (WAMkey®, GoldenDent, Inc.), which is a high strength steel tool with a bulb at the end, was inserted and rotated to remove the crown.
Fig. 6
A crown separating tool (WAMkey®, GoldenDent, Inc.), which is a high strength steel tool with a bulb at the end, was inserted and rotated to remove the crown.
Fig. 7
The roots were sectioned through the furcation, and the individual roots were removed using an atraumatic extraction system (Physics Forceps®, GoldenDent Inc.). With this instrument, the silicone bumper is positioned as far into the vestibule as possible to act as a center of rotation or fulcrum, while the shovel-shaped beak engages the 1- to 3-mm lingual surface of the root. When a slow, rotating wrist motion is applied, the steady load results in a physiologic release of enzymes that break down the periodontal ligaments and release the individual roots with minimal effort.
Fig. 8
Post-extraction radiographic evaluation of the socket site to ensure that no root fragments remained.
Fig. 9
A one-step graft material (Osteo- Gen® Plugs, Impladent) was placed and then condensed slightly above the crest to preserve the socket and develop the bone. This alloplastic material, which consists of calcium apatite in a bovine Achilles tendon matrix, does not require primary closure or the use of a membrane. The epithelium will choose to grow on top of the graft but will be unable to penetrate the socket.
Fig, 10
A one-step graft material (Osteo- Gen® Plugs, Impladent) was placed and then condensed slightly above the crest to preserve the socket and develop the bone. This alloplastic material, which consists of calcium apatite in a bovine Achilles tendon matrix, does not require primary closure or the use of a membrane. The epithelium will choose to grow on top of the graft but will be unable to penetrate the socket.
Fig. 11
An immediate post-grafting radiograph shows the material in place with some radiolucency.
Fig. 12
The site was sutured with PGA sutures (Vicryl®, Ethicon). The patient returned after 7 days so that the sutures could be removed and the healing evaluated.
Fig. 13
Three-month postoperative CBCT analysis of the integration of the graft material. An objective determination of bone turnover can only be appraised radiographically. The graft turnover to bone was more prevalent in the apical third, but integration would continue over time. The vital anatomy was evaluated, and the ideal implant length, width, and angulation were planned prior to surgical placement.
Fig. 14
An envelope reflection was performed to permit visualization and evaluation of the bone turnover and available hard tissue to confirm that the grafted site was now ready for dental implant placement.
Fig. 15
View of the dental implant (Glidewell HT™ Implant System, Glidewell) being inserted into the osteotomy site to the crest of the edentulous ridge.
Fig. 16
An immediate postoperative radiograph was acquired to verify proper implant placement.
Fig. 17
Three-month postoperative view of the tissue cuff formed during integration of the implant.
Fig. 18
A scanning pin was placed for a digital scan to facilitate proper milling of the implant-supported prosthesis.
Fig. 19
Occlusal views of the screw-retained zirconia crown (BruxZir®, Glidewell), which was torqued into place at 35 Ncm, and the screw access hole obturated with a tooth-colored material.
Fig. 20
Occlusal views of the screw-retained zirconia crown (BruxZir®, Glidewell), which was torqued into place at 35 Ncm, and the screw access hole obturated with a tooth-colored material.
Fig. 21
Posttreatment periapical and panoramic radiographs of the final implant-supported prosthesis.
Fig. 22
Posttreatment periapical and panoramic radiographs of the final implant-supported prosthesis.
Timothy Kosinski, DDS
Timothy Kosinski, DDS