EXAM Prognosis

Zitzmann et al. Prognosis Factors

Factors	Good	Questionable	Hopeless
Periodontal	PPD ≤3 mm, BoP-, PAL loss ≤25%, FI degree ≤I	Residual PPD ≥6 mm and BoP+, PAL loss of approximately 50%, FI degree II or III, root proximity	Insufficient residual attachment
Endodontics	No clinical signs and absence of or decreasing radiolucency	No clinical signs and persisting radiolucency	Symptomatic situation and radiolucency, no further treatment feasible
Implants	Absence of BoP, suppuration, bone loss	BoP with/without bone loss	Mobility
Prosthetic	Sufficient residual tooth substance, adequate retention and resistance forms (ideally, 4-mm wallheight with 15- to 20-degree convergence angle, 1.5- to 2-mm ferrule)	Reduced retention/ resistance form (<3-mm wall height and/or >25-degree convergence angle)	Insufficient residual tooth substance (<1.5-mm circular ferrule), no crown lengthening or extrusion feasible

(PPD: probing pocket depth; BoP: bleeding on probing; PAL: probing attachment level; FI: furcation involvement (degree 0 to 3))

Jotkowitz and Samet (2009) Classification System

	Class A Good	Class B Fair	Class C Questionable	Class D Poor or Compromised	Class X Hopeless or Illogical
Periodontal condition	80%-100% bone support. Easily maintained.	50%-80% bone support. Can be well maintained.	30%-50% remaining bone support. Difficult to be well maintained.	<30% bone support. Cannot be cleaned or maintained well and has evidence of active periodontal disease.	< 30% bone support. Cannot be cleansed or maintained without acute outbreaks of periodontal infection.
Restorative condition	80%-100% remaining sound coronal tooth structure. Easily restored.	50%-80% remaining sound coronal tooth structure. Restoration results in no infringement of biologic width, has adequate ferrule, good crown-root ratio.	30%-50% remaining sound coronal tooth structure. Achieving adequate ferrule would compromise crown-root ratio to some extent or affect adjacent structures.	<30% sound tooth structure. Extent of lost tooth structure does not enable good ferrule to be achieved without totally compromising support of adjacent tooth structures or crown-root ratio.	No remaining supragingival sound coronal tooth structure. Loss of tooth structure deep into the root dentin/canals.
Endodontic condition	Can receive straightforward primary endodontic treatment, or already has good endodontic therapy.	Failing endodontic treatment can receive predictable re-treatment, or requires a difficult primary endodontic treatment.	Failing endodontic treatment that is difficult to predictably re-treat.	Failing endodontic treatment that cannot be predictably re-treated.	A vertical root fracture or a tooth that has been retreated several times endodontically and/or surgically without resolution
Occlusal plane & tooth position	Tooth in correct occlusal plane, position, slightly deviated from ideal.	Tooth out of correct occlusal plane, can be adjusted to function within correct occlusal plane.	Tooth out of occlusal plane and requires multiple procedures to function within occlusal plane.	Tooth severely out of occlusal plane, severely tilted that after extensive treatment will exhibit reduced crown-root ratio, prevent from serving as long-term unit in arch. Position impacts health of adjacent structures.	A tooth so far super-erupted or tilted out of the occlusal plane that it cannot be restored into correct position function, or would interfere with the restoration of that arch or the restoration of the opposing arch.