A root canal filling per se does not have a significant negative effect on the marginal periodontium.
OBJECTIVE
To evaluate the periodontal status of single-rooted endodontically treated teeth (ET), correcting for patient- and tooth-related factors.


METHODS
Clinical parameters (BoP,PD,CAL) of 240 ET and 240 contralateral vital teeth (VT), before and after non-surgical periodontal treatment, were extracted retrospectively from the journals of 175 patients. Possible patient-related (age, gender, smoking status) and tooth-related (interproximal restoration, root canal filling's extent, post, tooth type) confounders were tested.


RESULTS
At baseline, frequency of BoP at an interproximal site at ET versus VT was 70.4% versus 65.0%, respectively. The frequency of teeth with interproximal PD ≥ 5 mm and CAL ≥ 5 mm was 47.9% versus 42.9% and 54.6% versus 49.6% at ET and VT, respectively. Interproximal PD and CAL at ET versus VT were 3.86 versus 3.61 mm and 4.11 versus 3.95 mm. After correcting for tooth-related factors, no significant differences were observed between ET and VT. An improper restoration had a significant (p < 0.001) negative effect on BoP [OR 3.49 (95%CI: 1.95-6.27)], PD [36.81% (95%CI: 18.52-57.92)] and CAL [27.01% (95%CI: 12.67-43.18)]. No significant differences between ET and VT were observed regarding clinical outcome of non-surgical periodontal therapy.


CONCLUSIONS
Presence of a root canal filling per se does not have a significant negative influence on the marginal periodontium, when correcting for the quality of the interproximal restoration.
Division of Oral Surgery, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.|Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.
Kristina
http://orcid.org/0000-0002-8279-7943
K
Bertl
Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.|Division of Dental Student Training and Patient Care, Outpatient Clinic, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Nedim
N
Suljkanovic
Division of Dental Student Training and Patient Care, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Lejla
L
Suljkanovic
Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, Medical University of Vienna, Vienna, Austria.|Austrian Cluster for Tissue Regeneration, Vienna, Austria.
Stefan
S
Lettner
Division of Oral Surgery, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Azadeh
A
Esfandeyari
Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.|Division of Dental Student Training and Patient Care, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Andreas
A
Moritz
Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.
Andreas
http://orcid.org/0000-0001-8161-3754
A
Stavropoulos
Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Corinna
C
Bruckmann
D000328:Adult; D055113:Chronic Periodontitis / Q000145:classification / Q000628:therapy; D003793:Dental Restoration, Permanent / Q000145:classification; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017622:Periodontal Attachment Loss / Q000145:classification / Q000628:therapy; D057747:Periodontal Debridement / Q000379:methods; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000145:classification / Q000628:therapy; D010519:Periodontium / Q000033:anatomy & histology*; D011176:Post and Core Technique / Q000145:classification; D016300:Radiography, Bitewing / Q000379:methods; D012189:Retrospective Studies; D012390:Root Canal Therapy / Q000379:methods*; D012907:Smoking; D019227:Tooth Apex / Q000000981:diagnostic imaging; D019553:Tooth, Nonvital / Q000000981:diagnostic imaging / Q000628:therapy; D016896:Treatment Outcome
dental restoration; periodontal attachment loss; periodontitis; root canal therapy; scaling and root planing