Table 2 Positive prognostic factors for EPL outcomes
Patient | Younger patients39 Female patients39 Good plaque control and low full mouth bleeding scores46 Non-smokers47 Well-controlled diabetes47 |
Oral | No bruxism48 |
Tooth | Pre-operative factors: Less baseline attachment loss49 Anterior teeth39 Maxillary teeth39 No or minimal (≤ Grade 1) mobility Endodontic/restorative intra-operative factors: Well-sealed cuspal coverage restoration33 Orthograde root-filling within 2 mm of the root apex50 Bioceramic use as a retro or orthograde root filling material50,69 Undertaking elective RCT on EPL teeth with bone loss to or past the apex, where surgical periodontal treatment is planned33,35,52 Perforations <3 mm diameter72 Single cracks as opposed to multiple cracks in a tooth54 Cracked teeth which aren't terminal abutments54 Lower volume of any resorptive defect77 Periodontal intra-operative factors: Avoiding damage to cementum when carrying out periodontal therapy56,57 Use of guided tissue regeneration techniques in two and three-walled defects34,48,58,69 Combined endodontic-periodontal intra-operative factors: Treatment with a combination of non-surgical RCT and subgingival PMPR55 Subgingival PMPR at the same time as or within three months post-RCT52,53 |
Defect morphology | Narrow infrabony defect61 Contained (three-walled) defects61 Decreased extent of vertical component of furcation defects48 |
Operator | Operator skills and experience Minimally invasive surgical technique |
