Definition. A system developed by Dr. Edward Kennedy for classification of edentulous jaw conditions and partial dentures, based on the distribution of edentulous spaces. Class I is bilateral free-end saddles.

Why do we use Kennedy classification?

The Kennedy method of classification of Edentulous Spaces was originally proposed by Dr. Edward Kenedy in 1925. Like the Bailyn classification and also the Skinner classification, it is to classify the partially edentulous arch in a manner that will suggest certain principles of design for a given situation.

Which Kennedy classification has no modification?

Class IV A single, but bilateral (crossing the midline), edentulous area anterior to the remaining natural teeth Also known as anterior extension There is no modification for this.

What is modification in Kennedy classification?

Modifications. This refers to multiple edentulous areas present in a case. Modifications can only apply to Kennedy Classes I, II and III. This is because a Kennedy Class IV case with modifications would fall in to one of the other classifications, as these take priorities.

What determines the basic classification of edentulous arches?

The most posterior edentulous space determines the class of the arch for Classes I through IV. The length of the edentulous space, i.e. the number of missing teeth or the number of prosthetic teeth to be used on the denture, is not considered in the classification.

What is Ante's law?

In dentistry, Ante’s law is a postulate about crown-to-root ratio put forth by Irwin H. Ante in a thesis paper he wrote in 1926. Ante’s law states that: “the total periodontal membrane area of the abutment teeth must equal or exceed that of the teeth to be replaced.“

Which edentulous area will consider the class in Kennedy classification?

Rule 5: The most posterior edentulous area (or areas) always determines the classification. Missing teeth in the most posterior area determines the classification. An edentulous area should be classified as Kennedy Class I first, before moving on to classify as Kennedy Class II.

What is Angle's classification?

Angle in 1890, the Angle Classifications are based on the relationship of the buccal groove of the mandibular first permanent molar and the mesiobuccal cusp of the maxillary first permanent molar. This classification is considered to be one of the most commonly used methods for identifying misalignment for molars.

What is minor connector?

A MINOR CONNECTOR is the connecting link between the major connector or base of a RPD and the other units of the prosthesis, such as clasps, indirect retainers, and occlusal rests. 1. Minor connectors join. the major connector with other parts of the RPD. 2.

What is applegates rule?

RULE 1: Classification should follow rather than precede any extractions of teeth that might alter the original classification. RULE 2: If a third molar is missing and not to be replaced, it is not considered in the classification.

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What is an abutment teeth?

When your dentist installs your dental implant, the metal part that serves as a base for the crown is known as an abutment. It serves solely as a connector with one part attached to your jawbone, while the crown is fitted on the other end.

What is a saddle in dentistry?

Saddles. The saddle is the part of the denture that carries the artificial teeth over the edentulous area or saddle area. Saddles may be designed as mucosa-borne to transmit the occlusal load through the mucosa (Figure 3.3. 1) or tooth-borne, where occlusal rests transmit the load to the adjacent teeth (Figure 3.3. 2).

What is denture base?

DEFINITION. A denture base is that part of a denture which rests on the foundation areas and to which teeth are attached.

What are the rules Applegate's governing the classification of partially edentulous arches?

Applegate’s Rules: They are 8 rules to govern the application of the Kennedy system: Rule 1: Classification should follow rather than precede extractions that might alter the original classification. Rule 2: If the third molar is missing and not to be replaced it is not considered in the classification.

What are the classification of partial denture?

 Class I: Bilateral space with no teeth posterior to it.  Class II: Bilateral space with teeth present posterior to one space.  Class III: Bilateral space with teeth present posterior to both spaces.  Class IV: Unilateral space with no teeth posterior to it.

What is edentulous arch?

1. the first branchial arch, being the rudiment of the maxillary and mandibular regions; it also gives rise to the malleus and incus. 2. the dental arch formed by the teeth of the mandible; called also inferior dental arch.

What is modification space?

A space modification is a project that requires change to an existing room(s) to provide a better function for the end user. The projects can be small and require minimal changes; however many times the scope of work can require the project become a Minor Capital Project.

What is direct retainer?

A direct retainer is any unit of a removable dental prosthesis that engages an abutment tooth or implant to resist displacement of the prosthesis away from basal seat tissue.

What is altered cast technique?

The altered cast technique allows the ridge, recorded in functional form, to be related to the teeth so that when the prosthesis is seated, it derives support simultaneously from the teeth and the denture base.

What is telescopic denture?

According to GPT, a telescopic denture is also called as an overdenture, which is defined as any removable dental prosthesis that covers and rests on one or more of the remaining natural teeth, on the roots of the natural teeth, and/or on the dental implants (2).

What is telescopic crown?

The telescopic crown is defined as an artificial crown fabricated to fit over a coping (1). Telescopic crowns have been used mainly in removable dental prostheses (RDP) to connect the dentures to the remaining dentition (2, 3).

What is abutment and pier?

Pier are the internal supports of the bridge. Abutments are the ends supports of the bridge. Pier can use more than two in bridge construction. Pier are constructed between the abutments.

What is a flange in dentistry?

(flanj), That part of the denture base that extends from the cervical ends of the teeth to the border of the denture.

What is Tripoding in RPD?

Tripoding method is the simplest and traditionally used for recording the final orientation of the cast on the surveyor. It uses an analyzing rod or the carbon marker to locate and mark three points on the prominent areas of the cast. All these points should be in a single plane.

What is combination clasp?

A combination clasp is a circumferential retainer for a removable dental prosthesis that has a cast reciprocal arm and a wrought wire retentive clasp (GPT8). It consists of a wrought wire retentive arm and a cast reciprocal arm. The combination of a wrought alloy and cast alloy gives it the name ‘combination clasp’.

What is a Class 3 occlusion?

Class III occlusion is when the lower molars are very forward and do not fit their corresponding upper molars. In this faulty relationship, the lower teeth and the jaw project more forward than the upper and maxillary teeth.

What are the three classes of Angle's classification?

• Normal occlusion: The mesiobuccal cusp of the upper first molar occludes with the buccal groove of the lower first molar.
• Class I malocclusion: Same as normal occlusion but characterized by crowding, rotations, and other positional irregularities.

What classification is Neutroclusion?

neu·tro·clu·sion. (nū’trō-klū’zhŭn), A malocclusion in which there is a normal anteroposterior relationship between the maxilla and mandible; in Angle classification, a Class I malocclusion.

What is indirect retainer?

An indirect retainer consists of a minor connector and a rest, and helps to stabilize the distal extension RPD, indirectly (compared to direct retention with clasps), when the patient eats sticky foods. … Most frequently, indirect retainers are placed on canines or the mesial fossa of first premolars.

What are the components of RPD?

All definitive RPDs will have the following components: (1) a major connector, (2) several minor connectors, (3) two or more direct retainers, (4) one or more denture bases, and (5) one or more prosthetic teeth (Fig. 3-1). Each component or part one or more functions necessary for the operation of the RPD.

What is the difference between an implant and an abutment?

A dental implant is an artificial tooth root. Your jawbone fuses with the implant to provide a secure platform for an artificial tooth (prosthesis). Abutments are connecting pieces that join the prosthesis to the implants. You may need an abutment and a prosthesis as part of your treatment.