introduction: the purpose of this study was to evaluate external root surface temperature rise during post space preparation using la axxess bur, beefill pack system, and peeso reamer drill. materials & methods: the distal canals of forty-five extracted human permanent mandibular first molars were instrumented in crown-apical manner and obturated with lateral condensation technique. teeth were ...

The main objective of endodontic therapy is the thorough mechanical and chemical cleansing of the entire root canal system and its complete obturation with an inert filling material. Failure to find and fill a canal contributes toward the failure of endodontic therapy .The root canal anatomy of mandibular first molars is complex. Studies of the morphologic structure of root canal systems hav...

introduction : teeth with irreversible pulpitis usually undergo root canal therapy (rct). this treatment modality is often considered disadvantageous as it removes vital pulp tissue and weakens the tooth structure. a relatively new concept has risen which suggests vital pulp therapy (vpt) for irreversible pulpitis. vpt with calcium enriched mixture (vpt/cem) has demonstrated favorable treatment...

introduction : there is a direct relationship between the quality of root canal obturation and success of endodontic therapy. the aim of the present study was to assess the quality of canal obturation performed by undergraduate dental students at the faculty of dentistry, mashhad university of medical sciences, mashhad, iran. materials and methods: records of 200 endodontically treated teeth fr...

introduction: this study compared the root canal microbial count of necrotic teeth after irrigation with 6% sodium hypochlorite (naocl) (single session treatment) and two-session root canal treatment with two-week application of calcium hydroxide (ch) mixed with 0.2% chlorhexidine (chx) as intracanal medicament. methods and materials: in this randomized clinical trial, single-rooted necrotic te...

many materials have been introduced for apexification each having their own advantages and disadvantages. this case report aims to present a new method of apexification using a combination of deproteinized bovine bone mineral (dbbm) and enamel matrix derivative (emd). after irrigating the canal of the maxillary right canine with 2.5 % sodium hypochlorite, a mixture of bio-oss and emd was packed...

background and aims. trauma is one of the major factors associated with temporomandibular joint disorders (tmd). these disorders result from macro-trauma or micro-trauma. macro-trauma might be iatrogenic; for example, from intubation procedures, third molar extraction procedures, and lengthy dental appointments. the aim of this study was to evaluate the effect of lengthy root canal therapy (mor...

introdouction: the high prevalence of apical periodontitis (ap) of endodontic origin raises an important public health problem. root canal treatment (rct) and crown restoration (cr) have an effect on its prevalence. this cross-sectional study was performed to assess the effect of rct and cr on the prevalence of ap. materials and methods: two observers assessed 608 teeth with rct belonging to pa...