1) Which type of post should be used when more than3/4 coronal tooth structure is lost (reduced wall height)?

2) In case of retreatment, when should a crown be kept?

3) Canal orifices are identified with:

4) A working length has a file inserted 17mm. It is 2.5 short of the anatomical apex. What is the true working length?:

5) Which solvent can be used to soften hard-setting cements in a retreatment case?

6) The effects of mechanical instrument are enhanced by all of the following properties of root canal irrigation except one:?

7) Cementum cannot be resorbed by:

8) Which statement is true about digital radiograph?

9) In case of NaOCl allergy,

10) What is the main cause of apical periodontitis?

11) Gates glidden bur used by

12) A common name of chronic apical periodontitis is:

13) A patient presents with a periapical abscess and a draining sinus on tooth 12, how would you manage the sinus?

14) What shape is the access cavity for upper and lower premolars?:

15) In root canal treatment, over preparation of the wall of the canal with inflexible instrument will cause:

16) What should we do to unsupported cusps during as well as after endodontic treatment?

17) បរុសម្នាក់មកគ្លីនិករបស់ខ្ញុំទាំងព្រឹកព្រលឹម ហើយត្អួញត្អែរថាគាត់ឈឺធ្មេញថ្គាមក្រោម លេខ#36 ឈឺចាប់ ជាមួយ ទឹកក្តៅ។អ្នកជំងឺនេះមានរោគវិនិច្ឆ័យ:

18) Step-back technique starts from:?

19) Iodine potassium iodide is usually used in which concentration?

20) When should clarithromycin be prescribed?

21) The properties of chlorhexidine are as follows except one:

22) មានអ្នកជំងឺមានdraining sinus tract in labial vestibule of a maxillary central incisor. To confirm your diagnosis about the original of pathoses you should:

23) Which is not the typical indication of endodontic surgery?

24) The treatment of choice for the vital wide apex tooth which shows the pulp exposure is:

25) According to “apical box preparation” technique, the apical enlargement of the distal root of a lower molar with two canals should be:

26) According to “apical box preparation” technique, the apical enlargement of the palatal root of an upper molar should be:

27) You started RCT on tooth #46 two days ago which was asymptomatic. Patient was given another appointment to finish the RCT. The patient came back to your clinic complaining of severe pain when chewing on the same tooth. Clinical examination revealed pain on percussion only. Radiograph shows normal apical area. The cause of the pain might be:

28) Using a conservative approach, what is the restoration of choice for a small class II MO/OD cavity in a posterior root-treated tooth with limited functional and lateral stresses?

29) According to “apical box preparation” technique, the apical enlargement of upper canine should be:

30) What is the usage dose of metronidazole?

31) For patients with severe endodontic infections but not life-threatening and given that they are not allergic to penicillin, which antibiotic should be used?

32) ក្នុង Patient’s Complaint គ្រូពេទ្យត្រូវ

33) A child has sustained a traumatic exposure of primary central incisor, he presents to you for treatment two days after the injury. Which of the following should be considered?:

34) What is the restoration of choice for a large class II MOD cavity in a posterior root-treated tooth with limited functional and lateral stresses?

35) If an instrument is broken in the middle third of a canal at the very beginning of the root canal preparation of a tooth with a periapical lesion, and the separated instrumented can neither be retrieved nor bypassed, how would the prognosis be like?

36) Using a protective approach, what is the restoration of choice for a large class I cavity in a posterior root-treated tooth with limited functional and lateral stresses?

37) Which material cannot be used as a base for composite restoration?

38) Two main types of vital pulp therapy are:?

39) Single visit root canal treatment is indicated in case of:

40) According to “apical box preparation” technique, the apical enlargement of upper lateral incisor should be:

41) What contra indicate pulp capping:

42) The sequence of therapy recommended for emergency treatment is:

43) The true working length is confirmed with a radiograph using a:

44) What are the success rates of pulpectomy if carried out properly?

45) Which type of instruments should be used with balanced force motion?

46) MTAD and Tetraclean are a mixture of:

47) What is not an advantage of plastic material build-ups (particularly composite) with post over the use of cast post and core?

48) The causes unassociated with dental procedures, there are :

49) បរុសម្នាក់មកគ្លីនិករបស់ខ្ញុំហើយត្អួញត្អែរថាគាត់ ឈឺចាប់បន្តិចបន្តួចលើកលែងតែ ពេលទំពាចំណីអាហារចូលក្នូង Cavity។អ្នកជំងឺនេះមានរោគវិនិច្ឆ័យ:

50) Bent burs should be discarded because:?

51) For the canines, it is usually safe to introduce a file:

52) If severe endodontic flare-ups occur despite the complete instrumentation in an irreversible pulpitis case, what should we usually do?

53) Which test directly stimulates the dentin?

54) A Pregnant patient in her first trimester attends for dental examination, which of the following is correct:

55) For endodontic surgery, when can suture be usually removed?

56) When the patient is symptomatic and the root canal is wet

57) The speed at which an anesthetic solution should be injected is:

58) Which dressing material is placed permanently over the pulp stump in pulpotomy of primary teeth?

59) Which instrument should be used to remove the apical portion of GP in an attempt to retreat a failure case?

60) To achieve proper isolation for endodontic procedure, which method should we use?

61) For rubber dam, which thickness seals best?

62) To achieve optimum cavity preparation which of the following factors of internal anatomy must be considered:

63) if you choose to temporarily seal the access cavity of tooth with caviton, how thick should it be?:

64) The highest incidence of the pulp necrosis is associated with:

65) A semi-permanent restoration for anterior teeth with endodontic guarded prognosis and little tooth structure remained should be:

66) Which condition is best managed by a specialist?

67) Permanent teeth with three roots are :

68) What is the intended use of MTAD?

69) When should we first detect the extent of bone fill following endodontic surgery?

70) Extra canals are:

71) If at 6 months, the lesion is still present but smaller in size, the lesion:

72) Decreased size of pulp chamber and root canals of aged teeth is due to:

73) ភាគច្រើន Mandibular second Premolar មាន

74) Ca(OH)2 has all the following properties except one which is:

75) Which of the following is not a diagnostic tool commonly used in endodontics?

76) The push-pull motion is another name of:

77) Zinc-oxide eugenol cement has all the following properties except one which is:?

78) What are the two materials commonly used as the direct restoration for root-treated teeth?

79) Which instrument should be used to remove the coronal portion of GP in an attempt to retreat a failure case?

80) To reduce pain and cardiovascular effects upon injecting an LA containing epinephrine, one should not:

81) What is the ideal emergency treatment for irreversible pulpitis with pulp exposure if time permits?

82) When EDTA is mixed with NaOCl, what will happen?

83) Perforations in the crown and root.

84) The pulpectomy have :

85) If an instrument is broken in the middle third of a canal during the root canal preparation of a tooth with a periapical lesion, but the separated instrumented can be retrieved without much loss of root dentin, how would the prognosis be like?

86) Which of the following statements is true?

87) Third degree tetracycline staining is:

88) The pulpotomy is the surgical removal of:

89) According to “apical box preparation” technique, the apical enlargement of upper second premolar with two canals should be:

90) When chlorhexidine is mixed with NaOCl, what will occur?

91) If the canals are weeping, what shall we do?

92) Which is the antibiotic of choice for endodontic infection?

93) Symptomatic apical periodontitis can be probably diagnosed by:

94) What shape is the access cavity for upper and lower incisors?:

95) “Can you point to the offending tooth?” is the question regarding to:?

96) The pulpectomy devitalizing are:

97) Bacteria responsible for extraradicular infection are mainly:

98) Which of the following statements is not true?

99) Two main types of base materials are:

100) An ideal root canal:

101) In which condition should a final permanent restoration most likely be delayed after completing endodontic treatment?

102) Which is not a factor to consider when making a decision about the timing of obturation?

103) What is an example of non-end cutting bur used in finishing the access cavity?

104) Can assess cavity be modified during the root canal procedure?

105) Which cell type is the source of radicular cyst formation?

106) Which statement is true about post placement?

107) In case of pulp necrosis without swelling and limited time, the emergency treatment should be:

108) Calcium hydroxide sealers:

109) Which is the amount of anesthetic solution injected in intraligamentary injection?

110) Causes of endodontic failures include:

111) The main concern over composite filling as a final restoration of an endo-treated teeth is:

112) Which of the following tests is used to detect pulp vitality?

113) The causes of pulp injury associated with dental procedures, there are :

114) The access cavity in a maxillary central incisor is:

115) Which is the most commonly used flap in endodontic surgery?

116) The final restoration of an anterior tooth with largely intact crown or moderately class 3 or 4, and without discoloration or with discoloration responding well to bleaching should be:

117) What may not be one of the ways to manage the bleeding during endodontic surgery?

118) Pulpal inflammation reaches the periodontal areas through:

119) Which is the preoperative factor that would affect the treatment outcome:

120) An adequate restoration after an endodontic treatment should have all of the following properties except one which is:

121) What is the objective of coronal access ?:

122) Which statement is true about the indications of root canal therapy (treatment of non-vital teeth)?

123) A major determinant for the desired final apical diameter preparation is:

124) Major causes of failure in root canal therapy are:

125) According to “apical box preparation” technique, the apical enlargement of lower canine should be:

126) Give me an example of lubricant products?

127) How can you identify dentine on the floor of the pulp chamber in a molar?

128) Which condition always requires incision and drainage?

129) An 8 years old boy presents with class III fracture of tooth# 11, which appeared an hour ago, the apex is not closed. Your treatment should be

130) In which case can the treated-tooth be left open?

131) How many thicknesses of rubber dam are available?

132) Which motion is best used to prepare severely curved canals?

133) Which of the following tests is mainly use to detect cracks?

134) Direct pulp capping used by:

135) 24/ How can you identify dentine on the floor of the pulp chamber in a molar?:

136) Which syringe is recommended for irrigation?

137) What is not an advantage of build-up without post?

138) According to “apical box preparation” technique, the apical enlargement of upper first premolar with 3 canals should be:

139) Which statement is not true about the curettage of soft tissue lesion?

140) Using a conservative approach, what is the restoration of choice for a small class I cavity in a posterior root-treated tooth with limited functional and lateral stresses?

141) If amalgam is used to for cuspal coverage, what is the minimum thickness considered to be sufficient?

142) Which is the most commonly used pulp-capping material?

143) What are the indications of direct pulp capping in primary teeth?

144) Which of these does Sodium Hypochlorite not do?:

145) Which are the two universal clamp designs?

146) A fourth canal is usually found in:

147) Pain on percussion before endodontic treatment indicates

148) What shape is the access cavity for upper and lower canines?

149) Which of the followings is not one of the treatment principles of root canal therapy?

150) How many frame types are commonly used for rubber dam placement?

151) Which color of rubber dam should be used if possible?

152) Which concentrations of epinephrine are desired for LA used in surgical endodontics?

153) A 45-year-old male comes to your office complaining of severe continuous pain. He mentioned that he cannot chew or drink cold liquids and had little if any sleep in the past 48 hours. The first question you should ask to determine the specificity of the patient’s problem is:

154) According to “apical box preparation” technique, the apical enlargement of the distal root of a lower molar with one canal should be:

155) Why high-torque handpiece should only be used for detail work and to excavate carious soft dentin?

156) Which of the following features is the main difference between K-type files and reamers:

157) What type of dentine has to be removed during the indirect pulp capping procedure?

158) A Fourth canal typically found in which of the following:

159) What shape is the access cavity for upper and lower premolars?

160) What shape is the access cavity for upper and lower canines?:

161) Among the following products, which one is the gold standard as an electronic apex locator?

162) According to “apical box preparation” technique, the apical enlargement of mesio-buccal root of an upper molar with 2 canals should be:

163) Which apical landmark should be used as the apical reference point of choice?

164) When irrigating with Sodium Hypochlorite. How far should the needle be inserted ?:

165) Which type of pulp exposure has the lowest success rate when direct pulp capping is performed?

166) In RCT, over preparationof the outer wall of the optical curvature of the canal with inflexible instrument will cause:

167) What are the responses of the pulp tissue to non-destructive stimuli?

168) Pulpotomy is must be:

169) If an instrument is broken in the middle third of a canal at a later stage of the root canal preparation of a tooth with a periapical lesion, and the separated instrumented can neither be retrieved nor bypassed, how would the prognosis be like?

170) Which of the following is not a main reason for using rubber dam during root canal treatment?

171) Why is straight-line access important?

172) A motion in which a file is rotated 60-90 degree clockwise and then move counter-clockwise through 120-360 degree is called:?

173) Which one has the most tissue-dissolving ability?

174) Which dentin plays a role in creating the sclerosis of the dentinal tubules?

175) Which solvent is commonly used to make a custom solvent-softened cone technique?

176) In case of retreatment, when should a crown be removed?

177) According to “apical box preparation” technique, the apical enlargement of upper first premolar with 2 canals should be:

178) The infection of root canal system is related to:

179) Cervical pulpotomy is also called:?

180) Which method is not practical to evaluate the outcome of endodontic treatment?

181) In case of vital tooth, how should we determine the success of our treatment?

182) Extensive diffuse calcification as seen radiographically is indicative of:

183) An example of life-threatening conditions is Ludwig angina, which is:

184) Leaving the tooth open between appointment during root canal therapy could lead to:

185) According to “apical box preparation” technique, the apical enlargement of lower incisors with 1 canal should be:

186) The patient has no any symptoms and response normally to both pulp and periapical test. However, the radiograph shows the caries extend well into the pulp. So, what is the likely pulpal diagnosis of this case?

187) Which cells produce collagen and ground substance of the pulp tissue?

188) The majority of the pulp nerves are:

189) Which apical landmark is the part of root canal with the smallest diameter?

190) Which of the following stimuli can be considered as non-destructive?

191) A mechanical pulp exposure of small diameter ( Less than 1 mmin diameter ) in mandibular first molar is treat by:

192) The pulpectomy is the surgical removal of:

193) Which irrigant has tissue-dissolving ability?

194) If the endodontic flare-up may be caused by incomplete instrumentation, what should be done?

195) Which the best choice for pulp capping

196) Which of the following cells are not found in the pulp tissue?

197) The plexus of Raschkow is located:

198) Endodontic treatment is contraindicated when:

199) Factors to consider whether to retreat or not include all of the following except one, which is:

200) Which statement is true?

201) The incident of periapical cyst is well below:

202) What is the restoration of choice for a posterior tooth with a large decay and less than half of the tooth structure remained?

203) In which condition will the repair of the pulp be likely resulting as completed regeneration?

204) The best pulp capping is

205) Which of the following flap does not involve gingival margin, thus no risk of gingival recession?

206) Where is an extra canal often found in upper molars?:

207) What shape is the access cavity for upper and lower molars?:

208) The prognosis of retreatment to correct an endodontic failure is:

209) Which of the following is not a procedural error usually caused by improper straight-line access?

210) បរុសម្នាក់មកគ្លីនិករបស់ខ្ញុំហើយត្អួញត្អែរ ថាគាត់ឈឺធ្មេញថ្គាមក្រោម ឈឺចាប់ជាមួយទឹកត្រជាក់ ឬដោយជញ្ជក់ មាត់ការឈឺចាប់នេះនូវតែបន្តទោះបីយកចេញនូវអ្វីដែលជាមូលហេតុក៏ដោយ។ អ្នកជំងឺនេះមានរោគវិនិច្ឆ័យ:

211) Which of the following is defined as a treatment, which aims to preserve and maintain the pulp tissue that has been compromised but not destroyed, by caries, trauma or restorative procedures, in a healthy state?

212) The pulpotomy is usually done on:

213) The maximal distance from the CDJ to the root apex can be up to:

214) Trigeminal neuvralgia differs from odontogenic pain by being:

215) Why do we always try to preserve the pulp vitality of immature teeth?