Dental Education
Online Dental Education Dental education lectures and videos Online dental ce Dental education articles Expert dental educators Dental products education Dental Community
 
Dental Publication / Article Details

Biologic Width Demystified Biologic Width Demystified

Author(s):

Richard Erickson, MS, DDS

Date Added:

1/1/2001


Summary:

Much fuss is justifiably made by many clinician speakers over violating the biologic width in crown margin placement. We've all seen seminar slides of chronically inflamed tissue around a crown in violation of this sacred region. But what exactly is this so-called biologic width? Why when despite your best efforts to esthetically hide a crown margin in the sulcus, it comes peeking back at you at the next prophy visit? John Kois answered these questions recently1 much more clearly than I have ever heard in a presentation and here are the highlights.

Some healthy dimensions of the gingival area are needed in order to compare to what is abnormal. As you can see on the diagram at left, a kind of symmetry exists in normal healthy gingiva: 1mm sulcular depth, 1mm attached epithelium and 1mm connective tissue before the crest of the bone is reached. This is the biologic width. 85% of healthy patients will exhibit this 3mm dimension, while 2% will be less than 3mm and 13% will be greater than 3mm. Also, the distance between the CEJ and the crest of bone is 2mm on average. When this CEJ to crestal bone distance is less than 2mm, the gingiva ride up the clinical crown making the tooth appear submerged and short. If the CEJ to crestal bone distance is greater than 2mm, the CEJ may be exposed and the tooth will appear too long.

To summarize then, the biologic width is equal to 3mm: 1mm sulcular depth, 1mm attachment epithelium and 1mm connective tissue above the crestal bone. This is true on the broad facial surface. In the proximal papillae area, the correct biologic width increases to 4mm. This can be measured on any tooth using the "sounding" technique.



Related Articles
A Multidisciplinary Approach to Single-Tooth Replacement

A Multidisciplinary Approach to Single-Tooth Replacement
Over the last several decades, dentistry has focused on more conservative treatment modalities and preventive techniques. This has been possible not only because of improved techniques and materials, but also because of the understanding that tooth preparation, regardless of how conservative it may be, is an irreversible procedure

Author(s): Sergio Rubinstein, DDS;Alan J. Nidetz, DDS, Masayuki Hoshi, RDT
View Article>>
Long-Term Outcome of Cemented Versus Screw-Retained Implant-Supported Partial Restorations

Long-Term Outcome of Cemented Versus Screw-Retained Implant-Supported Partial Restorations
The present study was designed to compare the long-term outcome and complications of cemented versus screw-retained implant restorations in partially edentulous patients. The long-term outcome of cemented implant-supported restorations was superior to that of screw-retained restorations, both clinically and biologically.

Author(s): Joseph Nissan, DMD; Demitri Narobai, DMD; Ora Gross, DMD; Oded Ghelfan, DMD; Gavriel Chaushu, DMD, MSc
View Article>>
Effect of Different Cementation Techniques on Retained Excess Cement and Uniaxial Retention of the Implant-Supported Prosthesis

Effect of Different Cementation Techniques on Retained Excess Cement and Uniaxial Retention of the Implant-Supported Prosthesis
The aim of the study was to identify the different techniques of cementation (half filling, practice abutment, and venting) that will reduce the amount of retained cement and the effect of these techniques on retention of implant supported prostheses. The venting and practice abutment techniques are suitable methods of reducing retained excess cement with optimal retention values.

Author(s): Zubeda Begum, MDS; Radhika Sonika, BDS; Chheda Pratik, BDS
View Article>>
Related Videos
Rehabilitación Completa en Zirconio sobre Implantes y porcelana rosada Premium Member Content

Rehabilitación Completa en Zirconio sobre Implantes y porcelana rosada
Dr Julian Jaramilllo B, discutirá la optimización de una reconstrucción total maxilar con reconstrucción de estetica rosada en la terapia de implantes con la utilización de estructuras de zirconio.

Presented By:: Dr. Julián Jaramillo Botero
Presentation Style: Lecture
Community Rating:
 
Watch Now>>
Computer-Guided Occlusal Analyses in optimizing Occlusal Function - Part 1 of 3 Premium Member Content

Computer-Guided Occlusal Analyses in optimizing Occlusal Function - Part 1 of 3
Dr. Robert Kerstein introduces the principles of utilizing computer-guided occlusal analyses to direct occlusal evaluation and adjustment in the optimization of occlusal function.

Presented By:: Robert Kerstein, DMD
Presentation Style: Video
Community Rating:
 
Watch Now>>
Developing The Esthetic Eye - The Art of Team Treatment Premium Member Content

Developing The Esthetic Eye - The Art of Team Treatment
Dr. Larry Rifkin describes the key elements that all clinicians require to develop the esthetic practitioner within us.

Presented By:: Laurence R. Rifkin, DDS
Presentation Style: Lecture
Community Rating:
 
Watch Now>>
Related Courses
The Artist Within: How to Create Exceptional Looking Provisionals Premium Member Content

The Artist Within: How to Create Exceptional Looking Provisionals
In this webinar, Dr. Lerner will demonstrate how smile design, tooth anatomy and the shades of contour, surface texture and colour are all components of a beautiful smile.

Presented By:: Jay M. Lerner, DDS
Presentation Style: Online Course
CE Hours: 1 CEU (Continuing Education Unit)
Watch Now>>
Vertical or Shoulderless Preparations in Contemporary Prosthodontics Premium Member Content

Vertical or Shoulderless Preparations in Contemporary Prosthodontics
From a biological standpoint, preserving a maximum amount of sound tooth structure, as it is done in vertical preparations, might also offer a more conservative alternative to a horizontal margin design in other clinical conditions such as endodontically treated teeth, vital teeth in young individual, teeth affected by caries at the cervical third. Vertical margins on zirconia crowns have been tested in vitro and clinical reports have been published. A re-evaluation of possible advantages and shortcomings of vertical preparation design in contemporary

Presented By:: Carlo Poggio, DDS, MSD, PhD
Presentation Style: Online Course
CE Hours: 1 CEU (Continuing Education Unit)
Watch Now>>
Minimizing Adhesive Failures: The Science of Dentin Adhesives Premium Member Content

Minimizing Adhesive Failures: The Science of Dentin Adhesives
This webinar will look at the science behind bonding to dentin and review the risks and benefits of different clinical techniques.

Presented By:: Lee Ann Brady, DMD
Presentation Style: Online Course
CE Hours: 1 CEU (Continuing Education Unit)
Watch Now>>
Download Now

Important!

To view this dental publication or article, you must be a registered user of Dental XP. If you are already a member, click here to login.

Registration is free and only takes several minutes. Dental XP will never spam you, or sell your information.

Join For Free



Contact Us | Privacy Policy | Terms of Use
©2015

Preferred Language: English Flag
Contact Us · Login · Register