Ostectomy versus osteotomy with repositioning of the vestibular

8/7/2019 Ostectomy versus osteotomy with repositioning of the vestibular

1/21

Reported by

O.R.Ganesh

M.Sc.D Endo

Journal of Oral Surgery and Research2010 Jul 1;15 (4):e628-32.Berta Garca-Mira, Barbara Ortega-SnchezProfessor of Oral Surgery. Director of the Master of OralSurgery and Implantology.

University Medical and Dental School. Valencia, Spain


2/21

In periapical surgery (PS), in order to eliminate the

inflammatory apical tissue, form the root-end cavity

and achieve proper sealing of the apical foramen

with rootend filling, it is necessary to eliminate the

periapical bone via ostectomy. This removal should

be the minimum necessary to allow access to the

entire lesion and enable visual control of the apicesto the affected roots.

Ostectomy

surgical removal of all or part of a

boneOsteotomy

a surgical operation in which a bone

is divided or a piece of bone isexcised (as to correct a deformity)


3/21

Due to the greater thickness of the vestibular

cortical in this region, access to the mandibular

molar root apices requires a large ostectomy,occasionally leaving extensive bone defects.

The aim was to make a preliminary study of the

morbidity and prognosis following PS using

ostectomy or by osteotomy with repositioning ofthe vestibular cortical


4/21

Study sampleRetrospective clinical study of patientsundergoing PS between May 1999 and June2004. Inclusion criteria were mandibular molarsapicoectomized using ultrasound, with aminimum follow up of 12 months and adequate

completion of the follow-up questionnaires.Patients who did not follow the postoperativeinstructions were excluded.


5/21

Two groups were considered

Patients in Group1 (G1) were treated with

ostectomy


6/21

Group 2 comprised patients treated by

osteotomy with repositioning of the cortical

bone when the vestibular cortical was intact and

the teeth apices were more than 8 mm from the

mandibular canal The osteotomy was made

creating a bony lid in the vestibular cortical witha trephine burr, which was repositioned

following the apicoectomy and root-end filling.

This cortical bone is only obtained using the

osteotomy technique, and only in these cases is

repositioned subsequent to PS.


7/21


8/21

under local anesthesia

0.27 mm round tungsten carbide drill

irrigation with sterile physiological serum raised with the aid of a surgical hammer and

chisel.

Ultrasound tips for periapical surgery

All patients were the same postoperativemedication: amoxicillin


9/21

size of the ostectomy and osteotomy was

measured using a digital caliper

sizes were classified asLess than 1 cm2,

Between 1 and 2 cm2.

Greater than 2 cm2.

postoperative pain was recorded


10/21

postoperative pain was recorded

1 absence of pain

2 slight

3 moderate

4 intense pain.

Swelling was recorded1 absent (no swelling)

2 slight (intraoral swelling at the operated area)

3 moderate (moderate intraoral swelling at the

operated area)

4 intense (intensive extraoral swelling extending

beyond the operated area).


11/21

One week after surgery the patient was

examined and the sutures removed. The

appearance of any postoperative complicationssuch as hematoma, wound opening, infection or

postoperative neuropathy was noted


12/21

Success was determined by panoramic

radiographic

study using a digital orthopantomographSuccess criteria

1 failure

2 improvement

3 success.It was also noted if the tooth remained in the

mouth


13/21

The SPSS v15 program for Windows was used,

making a descriptive analysis of each of the

variables. A mixed ANOV

A study with 2 factorswas made. Statistical significance

was considered for values of p.0.05.


14/21


15/21


16/21


17/21


18/21

In the osteotomy group, pain peaked at a maximum on

the second day, while in the ostectomy group pain

remained level during the first 48 hours. Kvist et al.

also found maximum pain during the first 24postoperative hours. Regarding perceived swelling, a

maximum peak was found on the 2nd postoperative

day; similar to results obtained by Garca et al.after

operating on 102 patients. Patients undergoingostectomy presented greater swelling during the

postoperative period than the patients with osteotomy

and repositioning of the vestibular cortical


19/21

Although the success rate of PS on mandibular

molars was 58.4% after 12 months follow-up, a

high number of teeth remained in the mouth

(94.5%); similar to results obtained by Pearrochaet al,who achieved 90.4% clinical and 54.8%

radiographic healing after operating on 31

mandibular molars. Rud et al,on 834 mandibularmolar roots obtained 92% complete healing, 1%

uncertain and 7% failure; while von Arx et al,

found a 94% success rate in 16 mandibular molars


20/21

Ostectomy was used to access the tooth roots in

the majority of the lesions (91.6%). Osteotomy

allows the repositioning of the vestibular

cortical after surgery, but brought no benefits in

the few cases of this preliminary study.


21/21

Ostectomy versus osteotomy with repositioning of the vestibular

Documents

Transcript of Ostectomy versus osteotomy with repositioning of the vestibular