Repeated Acrylic Fractures on a Mandibular Fixed Full-arch Implant-supported Metal/Acrylic Prosthesis
A 77-year-old male patient was referred for the management of frequent and repeated acrylic fracture of his existing mandibular fixed full-arch implant-supported metal/acrylic prosthesis. He also complained about softtissue soreness and the lack of retention and stability of his maxillary removable partial metal/acrylic prosthesis. Both prostheses had been delivered two years previously as part of his full-mouth rehabilitation (caries, tooth wear, tooth fracture). His medical history revealed high blood pressure, controlled with the use of antihypertensive medication.
Surgical SAC classification
Advanced
Prosthodontic SAC classification
Complex
Learner Level
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1
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2
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3
|
Source
Treatment Guide 8
CME/CPD
0.25 hours
Purchase price
10
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General information
| Case Type | Edentulous Mandible |
|---|---|
| Jaw | Mandible |
| Area | Full-Arch |
| # of Teeth | All |
| # of Implants | 5 |
| Type of Implants | Two-Piece |
| Attachment | Two-Piece |
| Bone Augmentation | No |
|---|---|
| Augmentation Materials | - |
| Guided Surgery | No |
| Soft Tissue Grafting | None |
| Abutment Type | CAD/CAM |
| Prosthesis Type | FDP |
Esthetic Risk Assessment
| Esthetic Risk Factors | Low | Medium | High |
|---|---|---|---|
| Medical Status | Healthy | Compromised | |
| Smoking Habit | Non-smoker | Light smoker (< 10 cigarettes per day) | Heavy smoker (>= 10 cigarettes per day) |
| Patient's Esthetic Expectations | Low | Medium | High |
| Lip Line | No exposure of papillae | Exposure of papillae | Full exposure of mucosa margin |
| Periodontal Phenotype | Low-scalloped, thick | Medium-scalloped, medium-thick | High-scalloped, thin |
| Shape of Tooth Crowns | Rectangular | Triangular | |
| Infection at Implant Site | None | Chronic | Acute |
| Bone Level at Adjacent Teeth | <= 5 mm to contact point | 5.5 to 6.5 mm to contact point | > 7 mm to contact point |
| Prosthodontic Status of Neighboring Teeth | Virgin | Restored | |
| Width of Edentulous Span | 1 tooth (>= 7 mm) | 1 tooth (< 7 mm) | 2 teeth or more |
| Soft Tissue Anatomy | Intact | Defective | |
| Bone Volume | Horizontally and vertically sufficient | Horizontally deficient | Deficient vertically or deficient vertically AND horizontally |
* General SAC assessment modifiers that are also part of the ERA. To avoid redundancy they are listed in this section even if no complete ERA has been made.
** Not applicable to the ERA of immediate placement cases and replaced by "Socket Integrity" listed below under "Surgical SAC Classification". For all other placement types this value is a classification determinant and listed here even if no complete ERA has been made.
Surgical SAC classification
| SAC Level | Advanced |
|---|---|
| Defining Characteristics | Fully edentulous lower jaw to be rehabilitated with two or more implants |
| Modality | > 4 implants, extending to mental nerve region |
| Placement Protocol | - |
| Tooth Site | - |
| Socket Morphology | - |
| Socket Integrity | - |
| Bone Volume | Horizontally and vertically sufficient |
| Anatomic Risk | Moderate |
| Esthetic Risk | Low |
| Complexity | Moderate |
| Risk of Complications | Moderate |
Prosthodontic SAC classification
| SAC Level | Complex |
|---|---|
| Defining Characteristics | Fully edentulous lower jaw to be rehabilitated with an implant-borne fixed dental prosthesis |
| Loading Protocol | Conventional/early |
| Retention | Screw-retained, with 4 or more splinted implants Screw-retained, with 4 or more splinted implants |
| Maxillomandibular Relationship | - |
| Mesio-Distal Space | - |
| Inter-Arch Distance | Excessive (mechanical leverage issues) or restricted (space for components) |
| Bruxism | Present |
| Esthetic Risk | Low |
| Provisional Implant-Supported Prosthesis | Prosthodontic margin < 3 mm apical to mucosal crest Prosthodontic margin < 3 mm apical to mucosal crest |
| Interim Prosthesis during Healing | Removable Removable |
| Occlusion/Articulation | - |
| Occlusal Scheme/Issues | Anterior guidance |
Surgical SAC Modifiers
| Periodontal Status | History of periodontitis or genetic predisposition |
|---|
Prosthodontic SAC Modifiers
| Soft Tissue Contour and Volume | - |
|---|
General SAC Modifiers
| Oral Hygiene and Compliance | Insufficient |
|---|---|
| Access | Adequate |
| Craniofacial/Skeletal Growth | Completed |
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