The bases for using a particular occlusal design in tooth and implant‐borne reconstructions and complete dentures

Abstract

CRP--Studies of occlusal form and tooth arrangements, included balanced, lingualised and monoplane arrangements--lingualised posterior occlusion was preferred. Early studies on CRP design were observational as case reports, however data suggested that optimum function is achieved by modification of the maxillary occlusion, irrespective of the opposing mandibular occlusion. PRP--Edentulous ridge resorption is patient-specific, has a multifactorial aetiology and there is no objective data to confirm that mechanical factors cause bone loss; oral hygiene management is crucial for long-term health. Studies on distal extension PDs confirmed a link between bite force and masticatory function; preservation of two functioning posterior tooth units ipsilateral to the distal extension optimises function. Data indicate that patient-specific factors, rather than PD design-specific features, influence long-term PD outcomes. Implant superstructures--There is little scientific evidence specifying occlusal and superstructure design for fixed prostheses for teeth or implants. Occlusal scheme design and occlusal form have evolved through clinical experience, but there is no evidence to indicate that a particular design is superior. Complex neurophysiological mechanisms allow the jaw muscle system to accommodate to oral and dental changes.

Influence of implant abutment angulations on the fracture resistance of overlaying CAM‐milled zirconia single crowns

“…However, bone loading per se has been questioned as the lone source of resorption. 3 Nevertheless, biomechanical considerations play a role in the planning of fixed prostheses supported by osseointegrated implants where design of crown contour as well as occlusal form should be planned to achieve appropriate implant location. 3 Pre-angled abutments may be used to overcome non-ideal implant location due to lack of bone.…”

“…3 Nevertheless, biomechanical considerations play a role in the planning of fixed prostheses supported by osseointegrated implants where design of crown contour as well as occlusal form should be planned to achieve appropriate implant location. 3 Pre-angled abutments may be used to overcome non-ideal implant location due to lack of bone. 4 The high stresses induced through pre-angled abutments at the cervical zone of the implant could be a dominant factor influencing the success of the restoration.…”

“…4 The high stresses induced through pre-angled abutments at the cervical zone of the implant could be a dominant factor influencing the success of the restoration. 3 In a recent review it was reported that identical vertical loads applied to preangled abutments produced higher stresses at the coronal zone of the implant compared with straight abutments. Pre-angled abutments have been found to produce different stress distributions compared to straight abutments.…”

“…Pre-angled abutments have been found to produce different stress distributions compared to straight abutments. 3 In addition, the types of restorative materials used to construct the overlaying crowns are significant factors in determining the amount and distribution of the stresses loaded onto the superstructure and implant under functional forces. 5 The development of computer-aided design ⁄ computer-aided manufacturing (CAD ⁄ CAM) technology has focused on precise and consistent manufacturing of zirconia ceramics with high strength and toughness.…”

Prosthodontic considerations designed to optimize outcomes for single‐tooth implants. A review of the literature

“…As a result, the criteria for 'success' should be broadened to include objective and subjective measures of outcome. 5 This article examines the relationship in the literature between the methods of prosthesis fabrication and biological, technical and patient-related outcomes.…”