The Carolina bridge is an all-porcelain bonded pontic that can be used as an interim prosthesis and for many other valuable purposes.

In my last blog, I discussed why I love the Carolina bridge and its many applications as a restorative alternative. Now, I’ll provide an overview of the design and how to begin a case using the bridge.

Carolina Bridge Design

The design of the Carolina bridge bypasses problems found in Maryland bridges and adhesion bridges. The all-porcelain Carolina bridge is very esthetic because there is no metal substructure. There is also incredible light penetration.

Maryland bridges, on the other hand, are not esthetic due to the the graying created by metal wings. All-porcelain pontics, such as the Carolina bridge, often can be used when tooth anatomy comes before or restricts the prep and placement of a Maryland-type bridge. Also, it is easier to repair the proximal resin composite retaining connectors of Carolina bridges.

Carolina Bridge Case Technique

A case that illustrates a Carolina bridge technique is one where an adolescent patient presented with a missing maxillary right lateral incisor. A team consisting of a periodontist, an orthodontist, an endodontist, and a restorative dentist determined that a dental implant would be the best treatment once the patient reaches maturity.

The team decided to orthodontically submerge the endodontically treated root to best preserve the bony site for implant placement. They selected a Carolina bridge as the best interim prosthesis because the occlusal relationship was favorable and there was sufficient crown length of the abutment teeth.

At the first appointment, shade selection was determined and an elastomeric impression was made of the anterior segment. A working case, an impression of the opposing arch, and a bite registration were created. An all-porcelain pontic was fabricated of feldspathic porcelain by the laboratory. At the second appointment, the involved abutment teeth were fully cleaned and rinsed.

The pontic was trial positioned to assess the shade accuracy and the adaptation of the pontic to the residual ridge. Once the accuracy of the shade and fit was verified, the pontic was readied for cementation.

A silane coupling agent was placed on the etched proximal surfaces of the porcelain pontic to improve the bond strength. Preparation of the abutment teeth was done by lightly roughening the proximal surfaces with a coarse, flame-shaped diamond stone. At this point, the pontic was ready for bonding into the edentulous space.

Dr. Heymann will be a featured lecturer at the Pankey 2018 Annual Meeting in Nashville, TN.

Assessing and managing the papilla is particularly important when we are treatment planning esthetic cases. Usually, we pay attention to the papilla when planning anterior implants and are less focused on this when we are treatment planning natural teeth.

The papilla is valued in cosmetic dentistry because it is an essential element of smile esthetics. If we want patients to be truly happy with their results, we must include it in our early considerations.

Papilla Tips and Why They Matter

Many of our patients who are in their sixties and seventies will still show the tips of the papilla. This isn’t the case for other aspects such as the gingival margin. Because of this, it’s critical that we don’t ignore them when treatment planning a smile.

Two main aspects to focus on when diagnosing papilla esthetics are symmetry and papilla height compared to contact length.

Papilla Symmetry

Papilla heights should be symmetric across the midline. Papilla tips will vary for patients, with some creating a straight line when connected and others having a line that tips up toward the canines. Regardless, the left and right sides should mimic one another. For example, if the papilla tip is shorter between the canine and lateral, it should do this on both sides.

Papilla Height

Papilla height compared to contact length is also important. The papilla tip should take up 45-50% of the total length of the tooth from the gingiva to the end of the contact. Then the contact should use up the remaining 50-55% of this distance.

Looking at the existing papilla symmetry and height enables you to decide if the esthetics are acceptable. Your goal will be to maintain them optimally. If they are where you want them to be esthetically already, then you have a reference to determine the positive or negative effect treatments like crown lengthening, ortho, and restorative procedures could have. If papilla esthetics are not where you want them to be, you can use these parameters to evaluate treatment options and improve them.

What is your favorite part of treatment planning a case? We’d love to hear your thoughts in the comments! 

The Carolina bridge is a novel all-porcelain bonded pontic. It requires no significant tooth preparation, making it an outstanding option as an interim prosthesis.

Numerous bonded bridge designs have been advocated over the years for the temporary or permanent replacement of missing teeth. Both metal and all-porcelain designs of bonded bridges are popular, each with varying degrees of success.

All of these designs involve some degree of tooth preparation, which makes them irreversible in nature. This is where the Carolina bridge comes in. The key to success with a Carolina bridge is the availability of adequate surface area interproximally to ensure optimally strong resin composite connectors.

Utilizing an ultraconservative all-porcelain bonded bridge for the interim replacement of single incisors relies on clear understanding of indications, contraindications, and clinical technique.

I Love the Carolina Bridge & Here’s Why

The Carolina type of bonded bridge provides benefits like ease of placement, esthetic vitality (no metal substructure), ease of connector repair, and a totally reversible nature.

Patients best suited for an all-porcelain bonded Carolina bridge are young adolescents with missing maxillary incisors. In these cases, an all-porcelain bonded pontic is an excellent interim prosthesis because of its totally reversible nature.

The abutment teeth can be returned to their original condition simply through removal of the bonded pontic and the resin composite connectors.

The Carolina bridge can also be used as a restorative alternative in cases where a more permanent fixed prosthesis is impractical or unaffordable. This might be a result of the patient’s age, medical condition, or economic status.

Additionally, patients with missing lateral incisors and in whom the remaining edentulous space is too small for an implant are often excellent candidates for an all-porcelain bonded pontic of this type. By slightly lapping the adjacent teeth, an esthetically acceptable prosthesis can be obtained.

In my next blog, I’ll talk about the design of the Carolina bridge and illustrate my technique for implementing it in appropriate cases. 

Dr. Heymann will be a featured lecturer at the Pankey 2018 Annual Meeting in Nashville, TN

Ever since I started my AEGD residency following dental school, I have loved continuing education. I’ve always sought new courses, new educators, new techniques. But for me, the most impactful educational experience was taking The Essentials courses at The Pankey Institute.

Not only did I learn about the complex temporomandibular and masticatory system, perhaps more importantly, I gained the skill and confidence I needed to tackle complex esthetic cases and truly found my sweet spot in dentistry.

Finding My Way in Dentistry

I am a bread and butter general dentist. However, my favorite cases are the ones that have the capacity to change someone’s smile, to make them not only healthier and more beautiful, but most importantly, improve their confidence. Once I gained these skills I wanted to implement them into my practice as soon as possible, but unfortunately I tripped over a few stumbling blocks before I found the right way to do that.

I remember one particular patient I had who really could have benefitted from some esthetic dentistry. I spent hours mounting the case, cropping and organizing photos, even waxing up anterior teeth on a model to show him the dramatic esthetic improvement I could make to his smile. That patient was engaged and listened to everything I had to say.

He came back for his second consult, asked questions, but at the end of the day never pursued treatment. I learned a valuable lesson in that case and numerous others. When I stopped presenting the treatment I thought patients needed and instead let them tell me what they wanted, I started closing cases.

As a part of my comprehensive exam, after the radiographs, the periodontal probings, the hard and soft tissue exam, and often clinical photography, I simply ask the patient, “Is there anything about the way your teeth look that you would like to change?”

To be continued…

The truth can be hard to face: Something is wrong with the design of these provisionals … We may be working on a broken provisional and feel the deep frustration that comes with knowing something went awry.

I challenge you, in these moments, to reframe the ‘problem’ as a mystery to be solved. You are the clinical detective who needs to work backwards a la Sherlock Holmes to figure out ‘whodunit.’

Mystery of the Broken Anterior Provisional

Remaking and adjusting an anterior provisional from the upper right to the upper left canine (for the second time) is a horror story in the making. Before you allow that narrative to take over and call the lab to have them rush the case back, remember to rely on your intuition and technical expertise.

You may not be able to call the lab because you haven’t taken final impressions. Either way, let the provisionals tell you what the flaw in the design is, rather than believe you can run the solution show.

A good first place to look and listen for answers is the occlusion. For example, if the patient reports that they wake up with headaches after you’ve placed the provisionals, you would want to look closely at envelope of fucntion. Is the patient heavy on the centrals and laterals? If so, you can begin the process of adjusting.

Methods of the Dental Detective

As you examine the issue, you may find other clues, such as that the patient is catching on the incisal edge in their return stroke from protrusive. You continue to adjust, beveling edges for a smoother transition. You leave the guidance shared between the canines and centrals, keep it smooth, but even this doesn’t stop the patient from breaking the provisional.

If you’ve ever seen or read a good detective story, you know this isn’t the time to quit. When things seem most opaque, the detective is usually at a breaking point where the parts might finally start to fit together. Once they do this, the flood gates open and they rush toward the explanation.

You will reach this point while adjusting again. In response to what you’ve learned, you begin to shallow the patient’s guidance and share protrusive with the premolars. You decide to shorten lower anteriors and increase overjet by proclining the restoration. Here, you’ve come to the solution. You need to work it out on an articulator perhaps and then go back to the mouth.

The main lesson is that we have the most to learn from cases that don’t go perfectly. Plus, it would get pretty boring if there were no dental mysteries left to solve …

Click Here for When Ceramic Debonds: Part 1

A Methodical Process for Examining the Frustrating Reasons Behind Why

One of the most disheartening and emotionally upsetting situations is when a ceramic restoration debonds. Our ability to act constructively in the moment is key to our future case success.

In Part 1 of this series, I explained why it’s important to acknowledge your frustration without letting it control you. I also outlined the beginning of a methodical thought process that will help you figure out why ceramic debonds.

The following steps assume you’ve already looked at the resin and determined if the ceramic was prepared, cleaned, or conditioned properly.

Completing Your Investigative Process When Ceramic Debonds

You have a different set of explanations for what happened if all of the resin cement is on the ceramic and the tooth is clean.

Clean the tooth thoroughly to remove all trace of the temporary cement. The issue may have occurred when the enamel and dentin were etched, regardless of whether you used a total etch or a self etch technique.

Next, ask yourself about the amount of enamel you have versus the amount of dentin. This involves taking a second look at the prep, because secondary dentin can be quite problematic when bonding.

Another area you may need to reconsider is your technique for dentin adhesive. Did you accurately follow the steps? Could poor isolation have led to a contaminated tooth during the process?

Lastly, sometimes there is some resin on the tooth and some on the ceramic. In this case when resin is in both places, you can benefit from rethinking the occlusal forces on the tooth and the functional design. Your patient may have higher functional risk or you might have lacked complete precision while adjusting the final occlusion. A good clue that you’ll find resin on the tooth and the ceramic is if it fails under load.

You can better target your problem solving and decrease the risk of the same technical issue recurring in the future by identifying where the resin is located. Follow the thought process in this series and you’re well on your way to smoother cases.

How do you respond when ceramic debonds? Please let us know your thoughts in the comments!

Methodical Process for Examining the Frustrating Causes

Dentistry is not solely a clinical, emotionless skillset that uses techniques to achieve outcomes. It’s also emotional, fraught with the normal human frustrations of mistakes and complications. One of the situations where I see this most frequently is when a ceramic restoration debonds.

Acknowledging and Embracing Our Emotions When Ceramic Debonds

On an average day at the dental practice, we experience the full range of human emotions: happiness, curiosity, boredom, excitement, frustration, etc. But sometimes, this is interrupted by a situation that becomes far more dramatic.

Ceramic that debonds creates a highly disconcerting scenario. It makes us feel powerless and consequently we find it difficult to resolve the issue with the full spectrum of our scientific learning.

Before we can return to ourselves and work toward a resolution, we have to acknowledge that it’s okay to be human! You cannot outrun trouble and messiness. When ceramic debonds, you’re upset and the patient is upset. The confluence of these factors leads to the struggle of regaining control over your brain’s analytic functions.

Having a plan for these types of situations, a methodical set of steps to take and questions to answer amidst the blinders of upset can help you carry out the task at hand.

Questions to Ask During a Methodical Ceramic Process

There are two initial queries in our method for sleuthing out the cause when ceramic debonds. First, we ask why the ceramic restoration came off and how we can minimize or eliminate the possibility of it occurring again.

We must also then ask: Where is the resin cement?

The process for discovering this involves examining the tooth and the internal surfaces of the ceramic through the lenses of our dental loupes. Attempting to visualize the resin is ineffective compared to scratching the surface using an explorer.

If we’ve completed this test, finding that all of the resin is attached to the tooth and a clean ceramic interface, we proceed to the next step. We must consider the process of bonding to the ceramic and whether or not the ceramic was adequately prepared.

Dental ceramics can have many different preparation requirements depending on the type. They can have different etching times, distinctive percentages of hydrofluoric acid, or can require preparation with air abrasion. Oil secreted from hands, in addition to blood, saliva, die stone, or try in paste, could have contaminated the ceramic. If it wasn’t cleaned properly, the result was marred. One step where problems are more likely is when ceramic is conditioned with silane or Monobond Plus…

You can learn about other causes in the upcoming second installment of Dr. Brady’s ‘Why Ceramic Debonds’ series. How do you feel when you face this problem? Please leave your thoughts in the comments!

How an Extra Dental Assistant Can Improve Your Protocol for Restorations

Restorations and adhesive dentistry have rapidly advanced over the past few decades. Changes in materials necessitate corresponding changes in protocol. Read on to learn the adjustment that drastically improved Dr. Mike Crete’s bonding process.

30 Years of Significant Advances in Clinical Dentistry

I have been practicing for a little over 30 years and often find myself looking back amazed at how many advances have occurred in clinical dentistry. Dental school requirements were focused on metal restorations that were either: (1) condensed into place (amalgam and gold foil) with “retention form” the key to success, or (2) cemented with the likes of zinc phosphate. Ah, the good ‘ol days of mixing on a cool glass slab!

My favorite general advancement over the years has been the concept of adhesive dentistry.  Not a day goes by in my practice where I don’t either bond a direct composite, bond a crown or two, or place an entire arch of bonded porcelain veneers.

Why 4-Handed Dentistry Fell Short for My Restorations

I must admit when I first started placing bonded restorations I was gun shy and felt like I would never be as adept as I was at carving amalgams or burnishing exquisite gold margins. I fumbled through bonded porcelain and composite like it was the same as metal restorations. I had mastered working with one chairside assistant. I could almost do dentistry blindfolded and 4-handed dentistry made me look great.

After about 3 years of really not liking treatment that involved bonding and finding myself justifying in my head how amalgam and gold were better, I finally had an aha moment when a mentor told me, ”You can’t do something new the old way.” I was a bit puzzled and asked, ”Why not?” My colleague then introduced me to the concept of 6-handed bonding.

6-Handed Dentistry Makes For a Better Bonding Protocol

Every time I do either a single unit or multiple indirect bonded restorations, I utilize both a chairside assistant and a “tray-side” or tertiary dental assistant. The tertiary assistant has the 5th and 6th hands.

The tertiary assistant helps by efficiently preparing the restorations for bonding (cleaning, silane, etch, prime, bond, resin adhesive, etc.) while the chairside assistant helps me keep the teeth isolated, etch the teeth, and place the restorations with precision and a very high level of accuracy. The chairside assistant can be totally focused on me and the patient, while the tertiary assistant prepares and hands me the indirect restorations.

Consider modifying your protocol to include a 3rd pair of hands and make 6-handed bonding part of your daily routine.

What is the most significant change in clinical dentistry you’ve noticed over the years? We’d love to hear from you in the comments!

Why Focusing on the Lower Anterior Teeth in Restorations is Important for Esthetics and Function

If you ignore the lower anterior teeth in a restoration, you may be sacrificing a significant amount of potential case benefits.

The process of improving dental techniques is one of constant refinement throughout our careers. We build upon techniques and begin to see our blind spots with each new case.

This blog is about specificity and detail-oriented technique. Excellent clinical dentistry balances the patient’s desire to improve their smile esthetics with effectively conveying the overall importance of planned changes to their health.

Incorporate the approach I discuss below into your restorative work and you’ll see the benefits extend widely to both final case esthetics and patient satisfaction. After all, those twin goals entwine throughout everything we do in the dental practice.

Restore Lower Anterior Teeth for Esthetics and Function

Have you ever noticed cases in various dental publications where nice restorative work has been completed on the upper anterior teeth, but the lower incisors were completely ignored? Oftentimes the lower anterior teeth (the little guys) are crowded, uneven, worn, and/or damaged.

This discordant aspect is visually jarring and detracts from the perceived beauty of the final result. The pristine nature of the upper anterior teeth throws the correspondingly less appealing look of the lower anterior teeth into greater relief.

The little guys are important for esthetics and function. They show considerably more on speech as we age, something very few patients realize. They are also critical for distribution of forces as we move into protrusive and excursions. The Pankey Institute recognizes the importance of lower anterior teeth as a vital aspect of complete dental care.

This is a periodontal case where a simple equilibration substantially improved esthetics and force distribution. Patients really appreciate an enhanced smile. They immediately feel better function and stability.

What commonly overlooked areas or techniques do you use to improve restoration esthetics and function? We’d love to hear from you in the comments!

Why You Should Determine Value Before Chroma and Hue When Matching Shades for Composites

The true artistry of the dental profession tends to show itself in many of the more challenging requirements of cosmetic dentistry. One of these areas where we can express our esthetic skills is in shade matching for composites. The struggle arises in understanding the various properties of natural-looking teeth and determining what visual aspects to match first.

 Composites 101: Defining ‘Shades’ and Their Components

Before you can begin to choose which aspects of a natural ‘shade’ to preference, it’s integral to delve into the nature of these complex components.

Reflectiveness and translucence combined determine the appearance of a tooth. Reflective properties are especially important for shade matching because this is the true definition of ‘value.’ Value tends to be defined as the coloring on a range of white to grey, but it’s actually a measure of tooth reflectiveness.

Other esthetic qualities of dentin and enamel include ‘chroma’ and ‘hue.’ A classic numeric scale of 1 (lowest) to 4 (highest) is used to judge chroma, which simply refers to the intensity of a color. Hue, on the other hand, is generally deconstructed into the letters A, B, C, and D. These indicate the names of color.

‘Shade’ is simply the end result when all three parameters of value, intensity, and hue are viewed together. The key lesson here is that these parameters must be matched separately. To achieve the best case outcome, you must rank them according to importance.

Should You Shade Match for Value, Chroma, or Hue First?

This is where things get tricky and we start to juggle multiple considerations at once.

Layering is paramount because dentin shades and light properties differ in composites versus real dentin. This is also true for enamel shades. Added to these differences is the fact that dentin and enamel do not have the same amounts of reflectiveness and translucence. Basically, you have dentin and enamel discrepancies between composites and real teeth in addition to the discrepancies that exist between dentin and enamel.

Precision will impact the final appearance of the tooth, so it’s important that you layer composites to get around these discrepancies. The composite materials selected should match for value before chroma and chroma before hue. Because final value is a blend of the individual values of every composite layer, you must consider that each layer is not going to be representative of your intended value. They build on one another to create life-like reflectiveness and translucency.

A Method You Can Use for Determining Value in Composites

My favorite method for constructing an esthetically superior value is to start the appointment with layering. I plan what composite shades I want to combine ahead of time and work efficiently so that inevitable teeth dehydration doesn’t affect my results.

I layer the materials on the labial of the adjacent tooth in their final thicknesses and photograph the outcome. This allows me to see if my chosen combinations match my esthetic goals and troubleshoot if the composite doesn’t disappear against the tooth. When I’m not happy with the look, I easily pop the composite off the tooth and re-do the process. I only begin to contemplate chroma and hue once I’ve matched the value.

How do you troubleshoot shade matching issues in your esthetic cases? We’d love to hear your perspective in the comments!