RPDDNT2
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389 questions
| 🇬🇧 | 🇬🇧 |
| First dentures were fabricated from | Ivory and bone |
| Some cultures also used ________ to make dentures | Gold, copper, and teeth from animals |
| One breakthrough in prosthodontics is the discovery of _______ which is used in most denture bases | Acrylic resin |
| A line encircling a tooth, designating its greatest circumference/ bulkiest at a selected position determined by a dental surveyor | Height of Contour |
| Types of undercut | Beneficial and nonbeneficial |
| Two or more vertically parallel surfaces of abutment teeth shaped to direct a prosthesis during placement and removal | Guiding planes |
| For easy placement; identify path of insertion | Guiding planes |
| The residual bone, with its soft tissue that covers the underlying area of the denture base | Residual Ridge or Edentulous ridge |
| Remaining bone under soft tissue | Residual Ridge or Edentulous ridge |
| An accurate and positive reproduction of a maxillary or mandibular dental arch made from an impression of that arch | Cast/Dental Cast |
| Types of arches in the oral cavity | Dentulous and edentulous |
| An arch/patient with no natural | Edentulous |
| RPD aims for ____ and _____ | Restoration and maintenance |
| RPD is the maintenance and restoration of what? | Oral functions, comfort, appearance, and health of the patient |
| In what way do we restore and maintain structure in RPD | Restoration of natural teeth and/or the replacement of missing teeth and craniofacial tissues with artificial substitutes |
| CONSIDERATIONS IN PROSTHODONTIC TREATMENT: | Oral functions, comfort, health and apperance |
| The goal is to provide _____________ by striving to understand how to minimize every opportunity for _______ a stable prosthesis | Useful, functional removable partial denture prostheses; providing and maintaining |
| Consequences of denture movement under load: | Stress to the abutments and tissue in contact with the prosthesis |
| In designing RPD: goal | Provide and maintaining a stable prosthesis: |
| CLASSIFICATION OF LEVERS:R (direct retainer) F (fulcrum = rest) E (occlusal load applied) | CLASS I/ “Seesaw |
| CLASSIFICATION OF LEVERS:Movement is away from the tissue (dislodgement) | CLASS II/ “Wheel barrow” |
| CLASSIFICATION OF LEVERS:Direct retainer at the middle, posterior to the fulcrum. E at the posterior | CLASS II/ “Wheel barrow” |
| CLASSIFICATION OF LEVERS:Stability of denture; Effort at the middle-2 stable component | CLASS III/ “Fishing pole” |
| POSSIBLE MOVEMENT OF A PARTIAL DENTURE: Movement from front to back | Rotation about an axis (fulcrum) through the most posterior abutment |
| Rotation about an axis (fulcrum) through the most posterior abutment: Vertical tissue ward movement is resisted by | Residual ridge, accuracy of the fit of the denture base, Total amount of occlusal load applied |
| POSSIBLE MOVEMENT OF A PARTIAL DENTURE: Moves left to right or buccally to lingually | Rotation about a longitudinal axis as the distal extension base moves in a rotary direction about the residual ridge. |
| Rotation about a longitudinal axis as the distal extension base moves in a rotary direction about the residual ridge: resists primarily by | Rigidity of the major and minor connector |
| POSSIBLE MOVEMENT OF A PARTIAL DENTURE: Resisted by stabilizing components such as reciprocal arms and minor connector | Rotation about as imaginary vertical axis near the center of the dental arch |
| Goals of designing RPD | Consideration of basic biomechanical principles, Oral hygiene, Appropriate prostheses maintenance |
| DESIGN PROCESS FOR REMOVABLE PARTIAL DENTURES: need | Tooth replacement |
| DESIGN PROCESS FOR REMOVABLE PARTIAL DENTURES: definition of problem | Provision of stable removable prosthesis |
| DESIGN PROCESS FOR REMOVABLE PARTIAL DENTURES: objectives | Limited functional movement within tooth-tissue tolerance |
| DESIGN PROCESS FOR REMOVABLE PARTIAL DENTURES: choice or solution | Alternative based on learned principles and concepts |
| The rationale for design should logically develop from: | Analysis of the unique oral condition of each mouth |
| DESIGN PROCESS FOR REMOVABLE PARTIAL DENTURES: background information | Tissue load displacement character and potential; effects of prev dentuer |
| Consideration of the forces inherent in the oral cavity is critical | Direction, duration, frequency, and magnitude |
| Physiologic tolerance | Capacity of oral structures to receive stresses without damage |
| Six phases of partial denture service: | Patient education; Diagnosis, treatment planning, design, treatment, sequencing and mouth preparation;Support for distal extension bases;Establishment and verification of oclusal relation and tooth arrangemnts;Inititial placment procedures; Periodic recall |
| Six phases of partial denture service:Patient education; Secure | Informed consent, patient cooperation and high level of patient compliance |
| Six phases of partial denture service:evaluate what in periodic recall | Fit (movement), functionality of denture, compliance of patient |
| TYPES OF RPD | Assresin appliance, resin with wire clasp, resin with castsed clasp |
| Maxillary teeth will be lost before mandibular | INTERarch Difference |
| Posterior teeth will be lost before anteriors | INTRAarch Difference |
| Remaining teeth usually | Mandibular anterior/Mandibular canine |
| Anatomical result of tooth loss | Broader mandible and constriction of maxilla |
| Clinical significance of anatomic loss of teeth | Hard time setting the pontics esp with remaining tooth because the jaw relationship is already class III |
| Why does the jaw protrude? | Compensate to cover/ close the mouth |
| Changes in facial features due to: | Altered lip support, reduced facial height |
| Attached gingiva is replaced with | Less keratinized oral mucosa |
| Clinical significance of less keratinized oral mucosa | Prone to trauma, lacerations, or to ulcers |
| Physiologic effects of tooth loss | Diminished masticatory effect, speech |
| Serve the role of reducing food to a point that it is ready for swallowing. | Teeth or prostheses |
| Ability to reduce food to a certain size in a given time frame | Masticatory efficiency |
| Index of food reduction | Masticatory efficiency |
| TOOTH REPLACEMENT FROM THE PATIENT’S PERSPECTIVE | Improves health/condition but not necessarily cure |
| Improves health/condition but not necessarily cure | EXPECTED OUTCOMES |
| Those that might involve factors related to our control or manipulation as a dentist. | UNEXPECTED OUTCOMES |
| Tissue damage, tissue abuse, design of dentures, materials that you use for the denture, or the design if you are fabricating RPD | UNEXPECTED OUTCOMES |
| Related to our control of manipulation:from faulty design not considering the impingement of tissues | Tissue damage |
| Those that we cannot control: | Accidental trauma, parafunctional habits |
| A typical sequence is used to discuss tooth replacement options: | Dental implant supported prosthesis, fixed prosthesis, rpd/cd |
| Purpose of Classification: | Facilitate treatment decisions on the basis of treatment complexity |
| Complexity is determined from the four broad diagnostic categories | Location and extent of edentulous areas, Condition of the abutments, Occlusal characteristics and requirements, Residual ridge characteristics |
| CLASSIFICATION OF PARTIALLY EDENTULOUS ARCH (KENNEDY):Also called bilateral distal extension cases | CLASS I |
| CLASSIFICATION OF PARTIALLY EDENTULOUS ARCH (KENNEDY):Also called unilateral distal extension case | CLASS II |
| Requirements of an Acceptable Method of Classification | It should permit immediate visualization of the type of partially edentulous arch that is being considered, It should permit immediate differentiation between tooth-supported and tooth-tissue-supported RPD, It should be universally acceptable |
| What then defines important differences between these prostheses? | Technical outcomes, physical outcomes, esthetic outcomes, maintenance needs, initial and future costs, physiologic outcomes |
| The replacement prosthesis ideally should provide | Function, level of comfort as equivalent as possible to normal dentition (gold standard). |
| RPD is like fixed partial denture because natural teeth alone provide direct resistance to functional forces | Tooth-bound spaces |
| Necessary that the residual ridge be used to assist in the functional stability of the prosthesis. | Tooth-tissue supported |
| TOOTH SUPPORTED(design consideration): | Less variable |