0 Patient Assessment
- 0.1 Patient demand
- 0.2 Overarching considerations
- 0.3 Local history
- 0.4 Anatomical location
- 0.5 General patient history
- 0.6 Risk assessment & special high risk categories
  - 5.1 Risk assessment & special high risk categories
  - 5.2 age
  - 5.3 Compliance
  - 5.4 Smoking
  - 5.5 Drug abuse
  - 5.6 Recreational drugs and alcohol abuse
  - 5.7 Parafunctions
  - 5.8 Diabetes
  - 5.9 Osteoporosis
  - 5.10 Coagulation disorders and anticoagulant therapy
  - 5.11 Steroids
  - 5.12 Bisphosphonates
  - 5.13 BRONJ / ARONJ
  - 5.14 Radiotherapy
  - 5.15 Risk factors
1 Diagnostics
- 1.1 Clinical Assessment
  - 0.1 Lip line
  - 0.2 Mouth opening
  - 0.3 Vertical dimension
  - 0.4 Maxillo-mandibular relationship
  - 0.5 TMD
  - 0.6 Existing prosthesis
  - 0.7 Muco-gingival junction
  - 0.8 Hyposalivation and Xerostomia
- 1.2 Clinical findings
  - 1.1 Occlusion
  - 1.2 Alveolar atrophy and insufficiency
  - 1.3 Skeletal consequences of edentulism
  - 1.4 Head-neck cancer
- 1.3 Clinical diagnostic assessments
  - 2.1 Microbiology
  - 2.2 Salivary output
- 1.4 Diagnostic imaging
  - 3.1 Imaging overview
  - 3.2 Intraoral radiographs
  - 3.3 Panoramic
  - 3.4 CBCT
  - 3.5 CT
- 1.5 Diagnostic prosthodontic guides
  - 4.1 Prosthodontic guides overview
  - 4.2 Wax-up, arrangement, mock-up
  - 4.3 Splints and imaging for surgery
  - 4.4 Provisionals
2 Treatment Options
- 2.1 Mucosally-supported
  - 0.1 Mucosally supported - Overview and important considerations
  - 0.2 Complete denture
  - 0.3 Immediate denture
  - 0.4 Occlusal schemes
- 2.2 Implant-retained/supported, general
  - 1.1 Prosthodontic options overview
  - 1.2 Number of implants maxilla and mandible
  - 1.3 Time to function
  - 1.4 Submerged or non-submerged
  - 1.5 Soft tissue management
  - 1.6 Hard tissue management, mandible
  - 1.7 Hard tissue management, maxilla
  - 1.8 Need for grafting
  - 1.9 Healed vs fresh extraction socket
  - 1.10 Digital treatment planning protocols
    
    9.1 Digital treatment planning protocols, introduction
    
    9.2 Digital treatment planning protocols, NobelClinician
- 2.3 Implant prosthetics - removable
  - 2.1 Implant overdenture, overview
    
    0.1 Implant overdenture, introduction
    
    0.2 Overdenture retention devices, overview
  - 2.2 Secondary splinting
  - 2.3 Primary splinting
- 2.4 Implant prosthetics - fixed
  - 3.1 Fixed implant prosthesis, introduction
  - 3.2 Screw-retained restorations
    
    1.1 Screw-retained
    
    1.2 Implant-supported vs abutment-supported
  - 3.3 Cement-retained restorations
    
    2.1 Cement-retained
    
    2.2 Abutment materials
  - 3.4 Framework materials
    
    3.1 Framework materials
    
    3.2 Veneering with ceramic
    
    3.3 Veneering with Acrylic
- 2.5 Comprehensive treatment concepts
3 Treatment Procedures
- 3.1 Surgical
  - 0.1 Surgical considerations
    
    0.1 Anesthesia
    
    0.2 Peri-operative care
    
    0.3 Post-operative care
    
    0.4 Flap-or flapless
    
    0.5 Wound closure
    
    0.6 Intra-operative complications
    
    0.7 Guided vs non-guided
    
    0.8 Semi-guided surgery with prosthetic template
    
    0.9 Guided surgery with drill guides
  - 0.2 Surgical protocols - general
    
    1.1 Crestal incision
    
    1.2 Choice of implant
    
    1.3 Parallel implant placement
    
    1.4 Tapered implant placement
    
    1.5 Insertion torque
    
    1.6 Insertion height
    
    1.7 Implant angulation
  - 0.3 Surgical protocols - mandible
    
    2.1 Implant placement with open flap procedure - mandible
    
    2.2 Grafting, mandible
  - 0.4 Surgical protocols - maxilla
    
    3.1 Implant placement - maxilla
    
    3.2 Grafting, maxilla
    
    3.3 Sinus lifting
    
    3.4 Zygomatic implants
    
    3.5 Pterygoid implants
    
    3.6 Problems and complications in maxillary implant surgery
- 3.2 Removable prosthetics
  - 1.1 Complete dentures
    
    0.1 Complete denture clinical protocol
    
    0.2 Complete denture impressions
    
    0.3 Complete denture - maxillo-mandibular relations
    
    0.4 Complete denture trial placement
    
    0.5 Complete denture placement
    
    0.6 Complete denture post-placement
  - 1.2 Implant overdentures
    
    1.1 Overdenture clinical protocol
    
    1.2 Implant overdenture impressions
    
    1.3 Implant overdenture maxillo-mandibular relations
    
    1.4 Implant overdenture trial placement
    
    1.5 Implant overdenture placement
    
    1.6 Implant overdenture post-placement
- 3.3 Fixed prosthetics
  - 2.1 Fixed implant prosthesis clinical protocol
  - 2.2 Impressions
    
    1.1 Impressions - overview
    
    1.2 Splinted vs unsplinted impression copings
    
    1.3 Open versus closed tray
    
    1.4 Parallel vs non-parallel
  - 2.3 Maxillo-mandibular relations
  - 2.4 Trial placement
  - 2.5 Framework trial placement
  - 2.6 Placement
  - 2.7 Post-placement
4 Aftercare
- 4.1 Surgical aftercare
  - 0.1 Medication
  - 0.2 Post-operative soft tissue management
  - 0.3 Suture removal
  - 0.4 Post-surgical recommendations
- 4.2 Prosthetic aftercare
  - 1.1 Esthetic and function check
  - 1.2 Provisionals / temporary prosthesis
  - 1.3 Oral hygiene instructions
  - 1.4 Occlusal guard
- 4.3 Post-treatment complications and management
  - 2.1 Bleeding
  - 2.2 Soft tissue and hard tissue
  - 2.3 Patient compliance / recall
  - 2.4 Biologic complications
  - 2.5 Esthetic complications
- 4.4 Recall visits and logistics
  - 3.1 Recall visits - overview
  - 3.2 Patient expectations
  - 3.3 General health check
  - 3.4 Professional oral hygiene
  - 3.5 Implant overdenture maintenance
  - 3.6 Occlusion check
  - 3.7 Probing
  - 3.8 Inflammation, infection
    
    7.1 Inflammation and infection - overview
    
    7.2 Infection, microbiological diagnostics
  - 3.9 Radiological control

Treatment guidelines

Problems and complications in maxillary implant surgery

Key points

Complications below can occur in the maxilla regarding implant placement or bone grafting:
Lack of primary implant stability
Placement of the implant tip in the maxillary sinus or nasal cavity
Perforation of the Schneiderian membrane during sinus floor elevation
Dislocation of implants or augmentation material
Bleeding

Complications

In the edentulous upper jaw the proximity of adjacent anatomical structures and bone density of residual bone can compromise implant insertion and may lead to complications such as lacking primary implant stability, perforation, dislocation of implants or augmentation material and bleedings.

Primary stability

Due to the bone quality of the maxilla (predominantly spongious bone) implants may lack primary stability and can loosen after insertion.

Penetration and perforation

Penetration of the maxillary sinus or the nasal cavity during implant bed preparation is a minor problem if there is adequate residual bone height for implant placement and implant primary stability. The tip of the implant should not be inserted deeper than 2 mm into the maxillary sinus.

Dislocation

Displacement of the augmentation material into the sinus happens due to perforation of the Schneiderian membrane during mobilisation and augmentation procedures of the maxillary sinus [Katranji 2008].

Implants can be dislocated into the maxillary sinus. The persistence of the implant/augmentation material in the sinus can lead to acute or chronic infections of the maxillary sinus. Dislocated implants and/ or augmentation material should be removed via a transoral or a transnasal access. Prior to the surgical intervention a 3D radiography, such as computed tomography (CT) or cone beam computed tomography (CBCT) is recommended [Sgaramella 2014].

Bleeding

An anastomosing vessel is located at the facial antral wall between the posterior superior alveolar artery and the infraorbital artery. Bleedings may occur during sinus lifting procedures. With the increase of the width of the lateral sinus wall, the vessel diameter increases as well leading to an increased risk of bleedings during surgery. The mean distance to the inferior border of the vessel from the sinus floor and from the alveolar crest can vary from 8-17 mm, respectively. Treatment of intraoperative bleedings includes: pressure, bone wax, burnish with bur and electro-cautery [Kang 2013].

Clinical topics

Additional resources

Videos

Edmond Bedrossian: Management of complications in the graftless concept

The All-on-4 treatment concept has an impressive track record. Described by Branemark et al. in 1971, a 10 year follow up in 1975 reported no statistical differences in success rates between a 4 or 6 implant restoration. Dr Bedrossian presents a comprehensive recent literature...

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