Dentine-bonded resin composite (Retroplast) for root-end filling: a prospective clinical and radiographic study with a mean follow-up period of 8 years.
OBJECTIVE
To evaluate treatment outcome after using a resin composite (Retroplast, RP) in combination with a dentine-bonding agent (GLUMA) as root-end filling material after 1 year as well as after more than 5 years (final examination). Also, the influence of various pre-, intra- and postoperative factors on the treatment outcome was studied.


METHODS
All patients (87) undergoing root-end resection consecutively treated by root-end filling with RP on an incisor, canine, pre-molar, or first molar (87 teeth, 118 roots) were initially enrolled in the study. RP was applied on the entire resected surface that was prepared to a slightly concave shape and after conditioning with EDTA and GLUMA. The treatment outcome involving subjective, clinical and radiographic parameters was evaluated after 1 year and at the final examination. A total of 27 patients (36 roots) were excluded from the study because of unavailability of follow-up (19) and extraction of the operated tooth for reasons other than failed surgery (8). Consequently, 60 patients (82 roots) were included in the final material. The mean follow-up period at the final examination was 8 years (range: 6.5-9 years).


RESULTS
The radiographic evaluation at the final examination revealed that 77%, 5%, 7% and 11% of the treated roots were characterized by complete, incomplete, uncertain and unsatisfactory healing, respectively. A total of 95% of the roots classified as completely healed at the 1-year control were also completely healed at the final examination. Two roots (5%) showing complete healing at the 1-year control revealed unsatisfactory healing at the final examination because of displaced or lost RP-filling. Moreover, 60% of the roots with uncertain healing at the 1-year control demonstrated complete or incomplete healing at the final examination. The classification according to subjective, clinical and radiographic parameters revealed that 78% of the teeth were characterized by a successful treatment outcome at the final examination. Evaluation of the influence of various pre-, intra- and postoperative factors on the treatment outcome revealed that the radiographic classification at the final examination was exclusively influenced by the radiographic classification at the 1-year control (P < 0.001).


CONCLUSIONS
The present long-term study indicates that RP can be used for root-end filling with a successful treatment outcome.
Yazdi
P M
PM
Department of Oral and Maxillofacial Surgery, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark. pmy@odont.ku.dk
Schou
S
S
Jensen
S S
SS
Stoltze
K
K
Kenrad
B
B
Sewerin
I
I
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001047:Apicoectomy; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate / Q000627:therapeutic use*; D002614:Chelating Agents / Q000627:therapeutic use; D003188:Composite Resins / Q000627:therapeutic use*; D003481:Cuspid; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D004492:Edetic Acid / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D005976:Glutaral / Q000627:therapeutic use*; D006801:Humans; D007180:Incisor; D008297:Male; D008875:Middle Aged; D008963:Molar; D011109:Polymethacrylic Acids / Q000627:therapeutic use*; D011446:Prospective Studies; D011859:Radiography; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D019227:Tooth Apex / Q000000981:diagnostic imaging; D016896:Treatment Outcome; D014945:Wound Healing
D002614:Chelating Agents; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D011109:Polymethacrylic Acids; D012387:Root Canal Filling Materials; D017438:Bisphenol A-Glycidyl Methacrylate; C044372:Gluma; D004492:Edetic Acid; D005976:Glutaral