Replacement of Multiple Teeth in a Partially Dentate Posterior Maxilla with Crowns Using a Conventional Loading Protocol
In 2004, an 84-year-old female patient presented at our practice with a hopeless prognosis for her maxillary right first and second premolars. These teeth were supporting a three-unit fixed dental prosthesis and had a cantilevered pontic replacing the first molar. Both teeth had combined endodontic and periodontal lesions, with significant bone loss in the area. The patient also had a large maxillary sinus apical to the first molar site. The patient presented with normal facial form and upon normal smiling, she displayed the affected area. She reported mobility and pain with mastication. The fixed dental prosthesis displayed severe mobility and could be depressed into the alveolar sockets. Exudate was evident around both abutments. There were no significant medical problems reported and the patient reported taking no medications.
Surgical SAC classification
Complex
Prosthodontic SAC classification
Straightforward
Learner Level
|
1
|
2
|
3
|
Source
Treatment Guide 2
CME/CPD
0.15 hours
Purchase price
10
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General information
| Case Type | Short Space |
|---|---|
| Jaw | Maxilla |
| Area | Posterior |
| # of Teeth | 3 |
| # of Implants | 3 |
| Type of Implants | One-Piece |
| Attachment | One-Piece |
| Bone Augmentation | Horizontal|Sinus Floor Elevation|Staged |
|---|---|
| Augmentation Materials | Autogenous chips|Xenogenous |
| Guided Surgery | No |
| Soft Tissue Grafting | None |
| Abutment Type | Standard |
| 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 | Complex |
|---|---|
| Defining Characteristics | Up to three missing teeth to be replaced with an implant-borne restoration or restorations |
| Modality | - |
| Placement Protocol | Early or late implant placement |
| Tooth Site | - |
| Socket Morphology | - |
| Socket Integrity | - |
| Bone Volume | Deficient vertically or deficient vertically AND horizontally |
| Anatomic Risk | High |
| Esthetic Risk | Low |
| Complexity | High |
| Risk of Complications | High |
Prosthodontic SAC classification
| SAC Level | Straightforward |
|---|---|
| Defining Characteristics | Up to three missing teeth to be replaced with an implant-borne restoration or restorations |
| Loading Protocol | Conventional or early |
| Retention | Cemented, with prosthesis margin < 3mm submucosal Cemented, with prosthesis margin < 3mm submucosal |
| Maxillomandibular Relationship | - |
| Mesio-Distal Space | Anatomic space corresponding to the missing teeth +/- 1 mm |
| Inter-Arch Distance | > 8 mm |
| Bruxism | Absent |
| Esthetic Risk | Low |
| Provisional Implant-Supported Prosthesis | - - |
| Interim Prosthesis during Healing | Removable Removable |
| Occlusion/Articulation | Harmonious |
| Occlusal Scheme/Issues | - |
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 | Sufficient |
|---|---|
| Access | Adequate |
| Craniofacial/Skeletal Growth | Completed |
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