Case

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Late Placement of an Implant in a Maxillary Left Central Incisor Site

Stephen T Chen

A 36-year-old female patient was referred for the replacement of the upper left central incisor (tooth 21), which had fractured. Although the tooth had been asymptomatic for many years, the crown began to loosen, at which time she presented to her dentist for an assessment. Teeth 21 and 22 had both been endodontically treated many years previously. She was a healthy individual and a non-smoker. On examination, the patient had a low lip line and only displayed the coronal half of the anterior teeth when smiling. The crown of tooth 21 was splinted to the adjacent teeth with composite resin, and the gingiva was inflamed.

General information

Case Type Single-Tooth Space
Jaw Maxilla
Area Anterior
# of Teeth 1
# of Implants 1
Type of Implants Two-Piece
Attachment Two-Piece
Bone Augmentation Horizontal|Staged
Augmentation Materials Xenogenous|Membrane
Guided Surgery No
Soft Tissue Grafting Simultaneous
Abutment Type Customized
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 One missing tooth to be replaced by an implant-borne prosthesis
Modality -
Placement Protocol Early or late implant placement
Tooth Site -
Socket Morphology -
Socket Integrity -
Bone Volume Deficient horizontally, requiring prior grafting
Anatomic Risk Low
Esthetic Risk Medium
Complexity Moderate
Risk of Complications Moderate

Prosthodontic SAC classification

SAC Level Advanced
Defining Characteristics One missing tooth to be replaced by an implant-borne crown
Loading Protocol Conventional or early
Retention Cemented, with meso-structure Cemented, with meso-structure
Maxillomandibular Relationship Angle Class I and III
Mesio-Distal Space Symmetry +/- 1 mm of contra-lateral tooth
Inter-Arch Distance -
Bruxism -
Esthetic Risk Medium
Provisional Implant-Supported Prosthesis Prosthodontic margin < 3 mm apical to mucosal margin Prosthodontic margin < 3 mm apical to mucosal margin
Interim Prosthesis during Healing Removable Removable
Occlusion/Articulation -
Occlusal Scheme/Issues -

Surgical SAC Modifiers

Periodontal Status Healthy

Prosthodontic SAC Modifiers

Soft Tissue Contour and Volume Slightly compromised

General SAC Modifiers

Oral Hygiene and Compliance Good
Access Adequate
Craniofacial/Skeletal Growth Completed

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