Oral Health Group

Treatment of Intrabony Defects After Impacted Mandibular Third Molar Removal With Resorbable and Non-Resorbable Membranes

March 13, 2011
by ken

Giuseppe Corinaldesi, MD, DDS, Giuseppe Lizio, DDS, et al

ackground: Mandibular second molar
(M2) periodontal defects following third molar (M3) removal in
high-risk patients is a clinical dilemma for clinicians. This study
compared the healing of periodontal intrabony defects at the distal
surface of the mandibular M2 using resorbable and non-resorbable

Methods: Eleven patients with bilateral pocket
depth = 6 mm distal to mandibular M2 and intrabony defect = 3 mm,
related to total impaction of M3, were treated with third molar
extraction, covering the surgical bone defect with a resorbable collagen
barrier on one side and a non-resorbable polytetrafluoroethylene
(e-PTFE) barrier contralaterally. The probing pocket depth (PPD),
probing attachment level (PAL), M2 molar mobility, and grade of
furcation probing were evaluated preoperatively,and 3,6, and 9 months
postoperatively. Intraoral periapical radiographs were taken
preoperatively, immediately and at 3 and 9 months postoperatively.

Both treatment modalities were successful. At 9 months, the mean PPD
reduction was 5.2±3.9 mm for resorbable sites and 5.5±3.0 mm for
non-resorbable sites; the PAL gain was 5.9±3.3 and 5.5±3.4 mm,
respectively. The outcome difference between the two sites for both PPD
and PAL did not differ statistically (p > 0.05) at any assessment time (3, 6, 9 months).

Alveolar bone loss causing a furcation defect.

Image via Wikipedia

Resorbable collagen membranes in guided tissue regeneration treatment
of intrabony defects distally to mandibular M2 obtained the same marked
PPD reduction and PAL gain as non-resorbable e-PTFE membranes following
third molar extraction.

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