Kennedy Classification PDF

KENNEDY'S CLASSIFICATION CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES BASIC OBJECTIVES OF PROSTHODONTIC TREATMENT 01 02 03 ELIMINATION PRESERVATION RESTORATION of oral disease to of the health and of oral functi...

KENNEDY'S CLASSIFICATION CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES BASIC OBJECTIVES OF PROSTHODONTIC TREATMENT 01 02 03 ELIMINATION PRESERVATION RESTORATION of oral disease to of the health and of oral functions that the greatest extent relationships of the teeth are comfortable, are possible and the health of oral and esthetically pleasing, paraoral structures, and do not interfere which will enhance the with the patient’s removable partial speech denture design CONSEQUENCES OF TOOTH LOSS ANATOMIC PHYSIOLOGIC ANATOMIC CONSEQUENCES 01 02 Loss of ridge volume Greater mandibular bone both in height and width loss than maxillary bone loss 03 04 05 Bone loss creating Attached gingiva is replaced with Bone loss is more broader mandibular less keratinized oral mucosa pronounced posteriorly arch and constricted than anteriorly maxillary arch PHYSIOLOGIC CONSEQUENCES 01 02 Less muscular guidance Change in chewing pattern 03 04 Altered lip support Reduced facial height PURPOSE OF CLASSIFICATION FACILITATE TREATMENT DECISIONS on the basis of treatment complexity CATEGORIES location and extent of edentulous areas condition of abutments occlusal characteristics and requirements residual ridge KENNEDY’S CLASSIFICATION Most widely accepted classification of partially edentulous arch REQUIREMENTS FOR AN ACCEPTABLE METHOD OF CLASSIFICATION 01 02 03 04 Should permit Should permit Should be Should serve as a visualization of immediate universally guide to the type the type of differentiation accepted of design to be partially between tooth- used edentulous arch borne and tissue- considered borne TOOTH-SUPPORTED TOOTH- AND TISSUE-SUPPORTED with teeth both anterior and with teeth either anterior or posterior to the space posterior to the space TOOTH- SUPPORTED NATURAL TEETH provide direct resistance to functional forces REST PREPARATION positive vertical support CLASPS allow the prosthesis to maintain position under the influence of horizontal chewing loads TOOTH-AND TISSUE- SUPPORTED RESIDUAL RIDGE assist in the functional stability of the prosthesis TOOTH MODIFICATION must be designed to allow appropriate functional stability from the tooth but with allowance for the anticipated vertical and/ or horizontal movement of the extension base  DISADVANTAGES OF CLASP-RETAINED PARTIAL DENTURE STRAIN ON ABUTMENT UNESTHETIC CARIES DEVELOPMENT TEETH improper tooth particularly when placed may develop beneath preparation or clasp on visible tooth surfaces clasp and other design and/or loss of framework components tissue support  KENNEDY CLASSIFICATION proposed by Dr. Edward Kennedy in 1925 CLASS I Bilateral edentulous areas located posterior to the natural teeth CLASS II Unilateral edentulous area located posterior to the remaining natural teeth CLASS III Unilateral edentulous area with natural teeth remaining both anterior and posterior to it CLASS IV Single, but bilateral (crossing the midline), edentulous area located anterior to the remaining natural teeth CLASS I BILATERAL EDENTULOUS AREAS LOCATED POSTERIOR TO THE NATURAL TEETH CLASS II UNILATERAL EDENTULOUS AREA LOCATED POSTERIOR TO THE REMAINING NATURAL TEETH CLASS III UNILATERAL EDENTULOUS AREA WITH NATURAL TEETH REMAINING BOTH ANTERIOR AND POSTERIOR TO IT CLASS IV SINGLE, BUT BILATERAL (CROSSING THE MIDLINE), EDENTULOUS AREA LOCATED ANTERIOR TO THE REMAINING NATURAL TEETH APPLEGATE’S RULES FOR APPLYING THE KENNEDY CLASSIFICATION LET'S PRACTICE