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Aim of study. The aim of the present study was to assess the prevalence of periapical lesions in root-filled lateral teeth as well as the distribution of periapical lesions according to various factors that can influence the therapeutic outcome. Materials and method. The study group included 163 patients (gender: 58 males, 105 females; mean age 48.13 ± 14.708 yrs.) with at least 2-yrs. follow-up of 412 endodontically treated teeth. Following the radiographic assessment of the root and its periapical area, the root canal treatments were classified as adequate and poor, while the apical lesions was diagnosed on radiographic examen. The quality of coronal marginal sealing (poor, adequate) was assessed by radiographic examen. The distribution of apical lesion was assessed on socio-demographical parameters (gender, age groups), location (maxillary, mandibular), follow-up, quality of root canal filling, status of coronal marginal sealing, occlusal contacts, recurrent caries. Results. Periapical lesions prevalence in root-filled lateral teeth was as follows: gender (males- 47,3%; females- 50,2%); age groups (20-39 yrs.- 41,9%; 40-59 yrs.- 52,4%; ≥60 yrs.- 47,4%); follow-up (2-4 yrs.- 57,7%; 5-8 yrs.- 44,5%) (p=.010*); location (maxillary teeth- 46,1%; mandibular teeth- 54,5%). 58% of teeth with poor coronal marginal sealing, and 59% of teeth with poor root canal fillings were diagnosed with AP. Conclusions. Apical lesions were detected in 49.3% of the lateral root-filled teeth. Molars, poor root canals fillings, poor coronal marginal sealing, presence of recurrent caries were significantly associated with endodontic periapical lesions.

Aim of study. The aim of the present study was to assess the prevalence of periapical lesions in root-filled lateral teeth as well as the distribution of periapical lesions according to various factors that can influence the therapeutic outcome. Materials and method. The study group included 50 patients (gender: 12 males, 38 females; mean age 51.48 ± 13.218). A total number of 150 anterior root-filled teeth were evaluated at 2-8 yrs. post-treatment. Following the radiographic assessment of the root and its periapical area, the root-canals fillings were classified as adequate and poor. The status of periapical area was assessed on periapical radiographic images. The quality of coronal marginal sealing was assessed as poor or adequate by clinical and radiographic examen. The distribution of apical periodontitis was assessed according to socio-demographical parameters (gender, age groups), location (maxillary, mandibular), follow-up, quality of root canal filling, status of coronal marginal sealing, recurrent caries. Results. The global prevalence of apical periodontitis was 50,7%. The prevalence of apical periodontitis in root-filled anterior teeth was as follows: gender (males- 37,5%; females- 54,2%); age groups (20-39 yrs.- 30%; 40-59 yrs.- 52,9%; ≥60 yrs.- 57,1%); location (maxillary teeth- 42,4%; mandibular teeth- 81,3%). The prevalence of apical periodontitis was 70% in teeth with poor coronal marginal sealing, and 61,4% in teeth with poor root canal fillings. Conclusions. Apical periodontitis was detected in half of the anterior root-filled teeth. The rate of apical periodontitis was significantly increased in maxillary anterior teeth, poor root canals fillings, poor coronal marginal sealing, and root-filled teeth with the presence of recurrent caries.

Aim. The aim of study was to assess the quality of root canal fillings and occurrence of various categories of technical errors in patients with endodontically treated teeth. Materials and method. The study group included 158 patients (gender: 56 males, 102 females; mean age 50.44 ± 13.469 yrs.) with 400 endodontically treated teeth. The endodontic treatments were considered poor when one or more of the next technical errors were noted on the orthopantomography and/or periapical radiography: length (short filling; overfilling); poor density; inadequate preparation; inadequate conicity; untreated root canals. Results. Only 21,5% of the endodontically treated teeth had root canal fillings without any technical error. 78,5% of the endodontically treated teeth had at least 1 root canal with poor endodontic treatments. AP prevalence in teeth with adequate root canal fillings was 16,3%, while teeth with at least one poor root canal filling had AP prevalence of 56,4%. According to sociodemographic parameters the distribution of poor root canal fillings was as follows: gender (males- 69,1%; females- 82,7%; age groups: 20-39 yrs.- 76,2%; 40-59 yrs.- 76,9%; ≥ 60 yrs.- 86,5%). According to location, the distribution of poor root canal fillings was as follows: Mx/Md: Mx- 75%; Md- 84,2%); dental groups: frontal- 76,3%; premolars- 73,1%; molars- 83,2%). Most technical errors were non-homogenous root canal fillings (64,8%), poor conicity (64,5%), short filling (56%). Conclusions. Considering all categories of technical errors in root canal filling, 78,5% of endodontically treated teeth had inadequate endodontic filling in at least one root canal. Apical periodontitis was found in 56,4% of teeth with poor root canal filling. The most frequent technical errors in endodontically treated teeth were inadequate conicity, non-homogenous root canal fillings and underfilled root canals.

In practice, there are clinical situations that make diagnosis difficult, particularly in case of endo-periodontal lesions with destructive effect at the furcal level. Sometimes these situations may lead to an incorrect therapeutic approach, the main objective in the treatment of endo-periodontal lesions being the stopping of the inflammatory process and the subsequent loss of the periodontal attachment. The aim of this study was to determine the influence of endodontic diseases on the periodontal tissues of furcal area and the rate of recovery in time after the treatment of radicular perforation which produced chronic injury, using reparative materials. Materials and method: The clinico-radiological study was carried out on a group of 24 molars with chronic furcal lesions. In both cases where the lesion was already present and where it was involuntarily performed, it was attempted to stimulate the restoration of the affected tissue by applying repairing biomaterials, seal the root canals and apply a coronal restoration. Results and Discussions: Based on the results of this study, MTA is required as an excellent material for perforation repair, and calcium hydroxide sealants have great advantages in regenerating periradicular bone tissue and the furcal area. Subsequent to endodontic therapy, in most cases, a prosthetic restoration of the treated tooth was made by applying a post and crown. Conclusions: In the case of the teeth included in this study, the effectiveness of medication based on calcium hydroxide and of the sealants with biostimulating properties was suported by the complete healing of the affected tissues.

Aim of the study The study aimed to determine the influence of root filling and coronal restorations quality on prevalence and severity of chronic apical periodontitis (CAP). Materials and method The study was performed on 126 patients (age 20-50), with a total number of 299 teeth with finished endodontic treatments and amalgam and composite resins restorations. The assessment of root fillings was performed on periapical radiographs and coronal restorations were assessed using clinical examination and byte-wing radiographs. The periapical status was analysed using P.A.I. indices. Results The study proves the high prevalence of chronic apical periodontitis (73.6%). High prevalence of C.A.P. (94.1%) and P.A.I. indices (4.06) are present for teeth with coronal restoration with poor marginal integrity and short root fillings. Conclusions Both the quality of the coronal restoration and the quality of the root filling (length and density) are correlated with the presence and severity of chronic apical periodontitis.