Tooth numbering system

tooth numbering system

1. TOOTH NUMBERING SYSTEM

2. INTRODUCTION Teeth are arranged in the jaws forming two dental arches : Maxillary Arch(Upper Arch) Mandibular Arch(Lower Arch) Two arches together constitute the dentition Each arch divided by an imaginary midline into : A right and left half called – QUADRANTS Maxillary right/left quadrants Mandibular right/left quadrants

3. Dental Formula For Primary/Deciduous Teeth: I2/2 C1/1 M2/2 = 10 Incisors, two maxillary and two mandibular Canine, one maxillary and one mandibular Molars, two maxillary and two mandibular. Totally 10 on one side (right/left)

4. Dental Formula For Permanent Teeth I2/2 C1/1 P2/2 M3/3 = 16 Incisors, two maxillary and two mandibular Canine, one maxillary and one mandibular Premolars, two maxillary and two mandibular Molars, three maxillary and three mandibular . Total -16 on one side(right/left)

5. WHAT IS TOOTH NUMBERING SYSTEM WHY DO WE NEED IT ?? System used by dentists to associate information to a specific tooth. In clinical practice some “shorthand” system of tooth notation is necessary for recording data. To do so efficiently, it is necessary to adopt a type of code or numbering system for teeth.

6. TOOTH NUMBERING SYSTEM The combined primary and deciduous dentition result in a total 52 teeth a clear and convenient means of identification of specific teeth is necessary . But there are 3 most popular. They are : Zsigmondy/Palmer system American Dental Association (ADA) system or Universal Numbering system Federation Dentaire International (FDI) system

7. Zsigmondy/Palmer system It is oldest system also called as Grid or Angular system In this system Primary Dentition are denoted by English Upper case Latter and Permanent Dentition are denoted by Number

8. Advantages : System is simple to use. Easier for beginner due to less confusion as permanent teeth and deciduous teeth are indicated differently. Disadvantages : There is no differentiation between right upper, right lower , left upper and left lower. Segments has only one number and used to designate particular tooth. No provision to identify supernumerary tooth Difficult for verbal transmission

9. ADA System or Universal System The Primary Dentition are denoted by consecutive english upper case latter starting from maxillary 2nd Molar The Permanent Teeth are indicated by number 1 to 32 .

10. Advantages : Separate number/ alphabet is given for individual tooth. Easy to visualize Disadvantages : Confusing when comparing with palmar notation system. Cannot be coded by computer. Confusing and difficult to remember. It does not consider the jaw quadrant clearly, thus similar teeth are given various numerous in different quadrant

11. FDI System it is also referred as Two Digit System. The first digit identifies the Quadrant to which tooth belong and second digit denotes the tooth. Both digit have to be pronounced separately. for Permanent Dentition Quadrant are numbered 1 to 4 and tooth are numbered 1 to 8 from the midline for Deciduous dentition the quadrant are 5 to 8 and teeth are denoted 1 to 5 from the midline

12. Advantage : It is very simple, accurate, and is easy to memorize. It is user friendly, and prevents errors in differentiating left and right, upper and lower arches, and tooth type. Simple to teach and easy to understand. Simple to translate into computer input. Simple in conversation and direction. Readily communicable in print. Disadvantage : In the case of deciduous teeth, there can be confusion and it is difficult to memorize. For specialists other than pedodontics, it can be difficult to understand or to define teeth. It is difficult to enter multiple teeth in different arches and it would be too long to use routinely.

13. THANK YOU..! DONE BY : M.P.YUVAN SAI 2 ND YR BDS